| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 092165000 | WITH GUIDE OR SEAL ON CYLINDER END PORTION FOR PISTON OR MEMBER MOVED BY PISTON | 55 |
| 20090107328 | Reciprocating Pump - A reciprocating pump ( | 04-30-2009 |
| 20090158924 | PISTON PUMP - The present invention relates to a piston pump for feeding a fluid, having a piston and a pressure chamber which is arranged between an inlet valve and an outlet valve. The inlet valve has a closing element, a spring element for restoring the closing element, and a holding device. The holding device has a holding region for holding and supporting the spring element and an integrally formed sealing region in order to seal the pressure chamber with respect to a low-pressure region of the piston pump. The sealing region is of annular design and has a parting gap which is closed in an installed state. | 06-25-2009 |
| 20100031814 | CLAMPING LEVER AND END CAP FOR RODLESS CYLINDERS - The present invention relates to an end cap for a rodless cylinder ( | 02-11-2010 |
| 20100071546 | CYLINDER APPARATUS - A cup seal | 03-25-2010 |
| 20100071547 | CYLINDER APPARATUS - A cup seal | 03-25-2010 |
| 20100206162 | RAM BEARING ASSEMBLY, SEAL ASSEMBLY THEREFOR AND ASSOCIATED METHOD - As seal assembly for a ram assembly is provided. An elongated ram extends through the seal assembly. The seal assembly includes a housing body, a plurality of seals and a retaining, and compression, device. The seals, as well as a male energizer and a female energizer, each have a split body. In this configuration, the seals and energizers may be replaced without removing the seal assembly housing body and retaining device from about the ram. This further allows for the ram to remain in place during seal replacement. That is, the split seals may be separated an placed about the ram. Once in place, the ends of the split seal are joined at an interface. The retaining/compression device compresses the seals so that the interface is sealed. | 08-19-2010 |
| 20100326269 | CYLINDER APPARATUS AND METHOD OF MANUFACTURING CYLINDER APPARATUS - A metallic protecting cover is formed from two axially split members, i.e. a first protecting cover member secured to a mounting eye, and a second protecting cover member having an overall length shorter than that of each of first and second cylinders and having a predetermined gap between itself and the second cylinder. The second protecting cover member is press-fitted into the first protecting cover member secured to the mounting eye to integrate the first and second protecting cover members into the protecting cover. Accordingly, the lower end of the second cylinder can be caulked in a state where the second protecting cover member has been temporarily assembled to the second cylinder. Thus, it is possible to ensure the required strength of the protecting cover and to increase the degree of freedom in assembly process. | 12-30-2010 |
| 20110011257 | ELECTRO-HYDRAULIC ACTUATOR HAVING END CAP WITH SPLIT BUSHING - An electro-hydraulic actuator includes a hydraulic pump, an electric motor operable for driving the hydraulic pump, a piston/rod assembly that is movable in response to fluid from the hydraulic pump, and a housing. A portion of the housing defines a cylinder bore within which a piston of the piston/rod assembly is located. The electro-hydraulic actuator also includes an end cap for closing an end of the cylinder bore and through which a rod of the piston/rod assembly extends. The end cap includes a bushing for supporting movement of the rod through the end cap. The bushing has an axially extending split and is adapted to be under compression when installed in the end cap. | 01-20-2011 |
| 20110067564 | HYDRAULIC CYLINDER - A hydraulic cylinder includes a piston unit inside a cylinder to be free to slide within the cylinder; and a piston rod having the piston unit fixed to one end thereof and another end thereof projecting from the cylinder. The piston unit is inserted into a small diameter portion of the piston rod with an end surface thereof fixedly contacting a shoulder end surface of the piston rod. A round portion is formed as an annular concave in a base end portion outer periphery of the small diameter portion of the piston rod. A tapered portion is formed on an inner periphery of the piston unit from the end surface in alignment with a portion formed by concaving the small diameter portion. A length of the tapered portion in a piston unit axial direction is equal or greater than a length of the concave portion in a piston rod axial direction. | 03-24-2011 |
| 20110107909 | PISTON SEAL GUIDE BEARING - A priming piston reciprocating pump | 05-12-2011 |
| 20110120298 | SLAVE CYLINDER - A slave cylinder inside a hydraulic section for clutch actuation. The slave cylinder is arranged concentrically about a transmission input shaft in the region of two different diameters that come in direct contact with each other. In order to create a slave cylinder with a compact design, despite unfavorable space conditions, the ratio of 2:1 between the mean housing diameter and the necessary guide length can be implemented, both the inner surface of the housing directed toward the transmission input shaft and the piston are congruent in the longitudinal section with the outer shape of the stepped transmission input shaft such that the piston is guided in the housing at the inside diameter on the clutch-side end and at the outside diameter on the transmission-side end. | 05-26-2011 |
| 20110185890 | SEALING MEMBER FOR MASTER CYLINDER AND MASTER CYLINDER HAVING THE SAME - Disclosed is a sealing member for a master cylinder and the master cylinder having the same, capable of shortening the delay in the release operation of the hill start assist control system. The sealing member includes an outer blade making contact with the cylinder body and an inner blade making contact with the outer surface of the piston. The inner blade includes a circumferential fluid path extending in a circumferential direction of the inner blade and a plurality of axial fluid paths connected to the circumferential fluid path. | 08-04-2011 |
| 20110192278 | FLUID PRESSURE CYLINDER - When a fluid pressure cylinder ( | 08-11-2011 |
| 20110197756 | Wiper Arrangement and Compressor with such a Wiper Arrangement - Conventional wiper arrangements with cut rings suffer from unavoidable leakage and, in particular in an embodiment as metallic wiper ring with a sharp wiping edge, scratch on the surface of the piston rod which can be damaged in this manner. In order to eliminate these problems, a wiper arrangement is proposed in which the radially inner circumferential surfaces | 08-18-2011 |
| 20110283880 | FLUID PRESSURE APPARATUS - In a fluid pressure apparatus, a packing includes an annular seal member made of an elastic material, and support rings made of a low-friction material, which are mounted on an outer circumference of the seal member. The seal member includes, on an outer circumference thereof, a sealing projection that contacts an inner surface of the slide hole. The support rings are disposed on both sides of the sealing projection, and protrude beyond the seal member in the axial direction. Outer circumferential surfaces of the support rings always contact the inner circumferential surface of the slide hole. When a transverse load does not act on a piston as a partitioning member, the inner circumferential surfaces of the support rings do not contact the outer circumference of the piston. When a transverse load acts on the piston, the inner circumferential surfaces of the support rings contact the outer circumference of the piston. | 11-24-2011 |
| 20120103182 | Slide Parts and Equipment Including Same - It is an objective of the invention to provide a slide part in which a seal member formed of an elastic body is in sliding contact with a hard member. There is provided a slide part comprising: a hard member having an amorphous carbon coating containing nitrogen formed on an outermost surface of a substrate; and a seal member formed of an elastic body, the seal member being in sliding contact with the hard member, wherein: content of the nitrogen in the coating is 3 at. % or more and 25 at. % or less, taking a total content of the carbon and the nitrogen in the coating as 100 at. %; the seal member contains fluorine at least in a sliding contact surface region thereof; and content of the fluorine in the surface region of the seal member is equal to or more than the nitrogen content in the coating. | 05-03-2012 |
| 20120118140 | JOIN CONNECTION FOR A PISTON GUIDING UNIT IN A HOUSING - Join connection for a piston guiding unit, preferably made from steel, in which a piston, in particular a brake or pump piston, is guided movably. The piston guiding unit is screwed to a housing which is preferably produced from aluminum, and the thread of the screw connection has a thread-forming contour. | 05-17-2012 |
| 20120152111 | PLUNGER PACKING WITH WEDGE SEAL HAVING EXTRUSION RECESS - A seal assembly is disposed in an annular recess in a cylinder chamber between a pump cavity and a pump exterior. The seal assembly includes a main seal and a back-up seal and seals to a pump plunger disposed within the cylinder chamber. The back-up seal includes an extrusion recess extending from a surface of the back-up seal adjacent the main seal along an inner or an outer diameter of the back-up seal. During pumping operations the plunger strokes through the cylinder chamber causing the main seal to extrude into the extrusion recess to form a seal between the plunger and the cylinder chamber. | 06-21-2012 |
| 20120160093 | AIR CYLINDER - An air cylinder having a simple and effective configuration to reduce the axial length and provide ease of processing. A sliding bearing that guides a piston rod is disposed at a position adjacent to a groove in which a rod packing is fitted. One end of the sliding bearing serves as the side wall of the groove and prevents displacement of the rod packing. The other end of the sliding bearing extends so as to cover part of a yenta of a first port. An orifice having a sectional area smaller than that of the yenta is formed at the position of the yenta by the sliding bearing. | 06-28-2012 |
| 20120210868 | PACKING ASSEMBLY FOR A PUMP - A header ring for use in a stuffing box comprising an annular body portion of an elastomeric material, an annular radially inward projecting sealing lip portion formed on said body portion and an annular, axially facing pedestal portion formed on said body portion, said pedestal portion defining an annularly extending radially inwardly facing pedestal surface, the sealing lip portion defining an annularly extending, radially inward facing sealing surface, the sealing surface and the pedestal surface forming a juncture, at least a portion of the pedestal portion adjacent the juncture and forming the pedestal surface and at least a portion of the sealing lip portion adjacent the juncture and forming a portion of the sealing surface being comprised of a layer of reinforced elastomeric material bonded to the body portion. | 08-23-2012 |
| 20120216673 | Coiled Felt Seal (CFS) Sealed Piston of Hydraulic Cylinder - Pistons and piston rods of hydraulic cylinders are fitted with coiled felt seal (CFS) in place of rubber O-rings for the sealing of the cylinders. The resulting piston-cylinder mechanical device has a simpler structure, lesser number of components without the multiple rubber O-rings, improved durability and higher performance with extreme temperature tolerance, enhanced internal pressure capacity, reduced power loss due to reduced piston-cylinder friction, and significantly reduced leakage. | 08-30-2012 |
| 20120260798 | Piston Assembly for Gyratory Crusher - A piston assembly for a gyratory crusher that contains designed wear parts comprising an upper piston bushing, a lower piston bushing, a piston wear ring and a hydraulic seal. All the wear parts can be replaced without access to the underside of the crusher | 10-18-2012 |
| 20120279388 | Sealing Ring, in Particular for a Hydraulic Piston Pump - A sealing ring, in particular for a hydraulic piston pump, for sealing a pressure chamber which is filled with a fluid is disclosed. A sealing lip having a contour contacts a sealing surface and is movable relative thereto. The contour of the sealing lip is adapted according to the speed of the sealing lip relative to the sealing surface, such that a defined leakage of the fluid out of the pressure chamber is adjusted. | 11-08-2012 |
| 20130087039 | GASKETLESS HIGH PRESSURE CONNECTION - A sealing system for a high pressure pump, in which the pump includes a vessel defining a vessel bore and having an end portion, the vessel bore having a first engagement face and defining a central longitudinal axis, and in which the pump further includes a plunger cooperative with the vessel to increase the pressure of a fluid within the bore, includes a seal member at least partially received within the bore and defining a second engagement face. The sealing system further includes a retaining member in operative contact with the seal member to mate the first engagement face with the second engagement face to inhibit fluid leakage from the bore. The first engagement face includes a first contacting surface having a non-linear cross-section. The second engagement face includes a second contacting surface having a non-linear cross-section in contact with the first contacting surface. | 04-11-2013 |
| 20130152779 | SHAFT ARRANGEMENT FOR AN AXIAL PISTON PUMP ASSEMBLY - A shaft arrangement for an axial piston pump assembly to couple to a rotatable member such as a gear therewith. A shaft extends at least partially through a housing chamber of the pump about a longitudinal axis. Reciprocating pistons are disposed within the chamber radially about the shaft. A cam unit is fitted over the shaft and provides an angled camming surface to engage the pistons. Bearing assemblies are fitted over the cam unit. An adapter can be fitted over the proximal end of the cam unit. The adapter has a distal surface which may abut the bearing assembly and be axially spaced from the cam unit, and an outer radial surface to engage the rotatable member. A clamping device provides a desired clamp load path between the rotatable member, the adapter, the cam unit, the bearing assemblies and the shaft. | 06-20-2013 |
| 20130152780 | Installation Assembly with Sealing Apparatus - A sealing apparatus for an installation assembly, which installation assembly serves for accommodating a measuring insert, wherein the sealing apparatus includes a piston, a bushing and at least one sealing element. The piston and the bushing serve to accommodate the measuring insert by a bore provided in the piston and in the bushing, wherein the piston is additionally connected interactively with the bushing in such a manner that a pressure transmitted by the piston to the bushing serves to deform the sealing element, which is preferably arranged on at least one end of the bushing, and thereby to achieve a sealing action, in order, in the case of introduced measuring insert, to seal the bore, especially liquid or gas tightly. | 06-20-2013 |
| 20130167714 | METHODS AND SYSTEMS FOR MANAGING A CLEARANCE GAP IN A PISTON ENGINE - A piston engine may include a non-contact bearing between a piston assembly and a cylinder. The piston may be configured to translate in a bore of the cylinder, and a non-contact bearing may be included in a clearance gap between the piston assembly and the bore. A bearing fluid may be supplied to the clearance gap via the piston assembly and/or cylinder to create the non-contact bearing. A bearing element may be used to direct or otherwise manage the flow of bearing fluid in the clearance gap. The bearing element may include one or more holes, porous portions, and/or passages to direct the bearing fluid to the clearance gap. | 07-04-2013 |
| 20130205993 | ADAPTIVE HYDRAULIC CYLINDER WITH FLOATING SEAL INTERFACE - In one possible implementation, a misalignment-tolerant hydraulic actuator, e.g., for a submersible hydraulic diaphragm insert pump (HDI), has a floating piston that can reciprocate while decoupled from collinearity with a cylinder barrel and a central feed rod that slides through a central axis of the piston. The floating seal can be integrated or provided by a separate insert and provides a pivotable interface between the piston and center rod, allowing these components freedom of motion to avoid elastic deformation, friction, power loss, and early wear when misalignment or transverse forces on an external end of the piston rod are present. Bearing placement can also be selected to eliminate over-constraint. | 08-15-2013 |
| 20130255481 | RAM BEARING ASSEMBLY, SEAL ASSEMBLY THEREFOR AND ASSOCIATED METHOD - As seal assembly for a ram assembly is provided. An elongated ram extends through the seal assembly. The seal assembly includes a housing body, a plurality of seals and a retaining, and compression, device. The seals, as well as a male energizer and a female energizer, each have a split body. In this configuration, the seals and energizers may be replaced without removing the seal assembly housing body and retaining device from about the ram. This further allows for the ram to remain in place during seal replacement. That is, the split seals may be separated an placed about the ram. Once in place, the ends of the split seal are joined at an interface. The retaining/compression device compresses the seals so that the interface is sealed. | 10-03-2013 |
| 20130319220 | Fluid End Reinforced With Abrasive Resistant Insert, Coating Or Lining - A fluid end for use in a high-pressure, reciprocating, fluid pump assembly is provided having a bore therethrough in which a plunger reciprocates. The fluid end is provided with an insert to improve the fluid end washout life. In one embodiment, the insert is constructed of a ceramic material. In another embodiment, the insert includes an abrasive resistant coating or lining. | 12-05-2013 |
| 20130333554 | Seal Assembly for Use in Harsh Environments - A sealing assembly, for example a piston ring, for use in harsh environments, e.g., high radiation levels. The piston ring has an annular sealing surface which together with a member forming a radially outer annular cylinder surface, e.g., a cylinder, forms a seal pocket. Received in the seal pocket is an annular seal comprised of a plurality of wraps of at least one strand of a substantially incompressible and inelastic material such as graphite fiber. The assembly further includes a compression ring and compression assembly which compresses the seal body between the support surface and the compression ring to displace the seal body into sealing engagement with the radially inner and outer sealing surfaces. | 12-19-2013 |
| 20130340609 | PUMP HEAD OUTLET PORT - Pumps used in liquid chromatography applications employ actuators for pressurizing and moving liquid. An actuator includes a pump head having a chamber, a gland, a movable rod extending through the gland into the chamber of the pump head, and a plunger seal disposed in the gland around the rod for sealing against fluidic leakage from the chamber. The plunger seal has an annular flange that provides an OD (outer diameter) seal against the gland. The flange defines a seal cavity. The pump head further includes an outlet port and an outlet channel. One end of the outlet channel is in communication with the outlet port and the other end of the outlet channel opens into the seal cavity of the plunger seal. The outlet channel provides a flow path for liquid in the chamber to travel towards the outlet port in response to movement of the rod. | 12-26-2013 |
| 20150122117 | Device And Method In Respect Of A Rock Drilling Machine And Rock Drilling Machine - A device for a hydraulic rock drilling machine ( | 05-07-2015 |
| 20160052759 | ACTUATOR IN A LIFT TRUCK - An actuator may comprise: cylinder structure, ram structure and a cushioning seal. The cylinder structure may comprise a cylinder tube, a cylinder base and a cylinder cap. The ram structure is slidably mounted within a cylinder structure bore and defines with the cylinder structure a gap therebetween. The ram structure may comprise fluid passageway structure for defining a path for fluid to move internally through the ram structure. The path may communicate with an outlet in a sidewall of the ram structure. The cushioning seal may be located between the ram structure and the cylinder structure and engage the ram structure and the cylinder cap during ram structure extension such that the seal substantially closes off a first portion of the gap extending from the seal toward the cylinder structure outer open end. The cushioning seal may be moved during ram structure retraction in a direction of ram structure retraction such that fluid flowing out of the ram structure sidewall outlet when the outlet is in the gap first portion flows between the seal and the cap. | 02-25-2016 |
| 20160178055 | GAS CYLINDER ACTUATOR WITH OVERTRAVEL SAFETY DEVICE | 06-23-2016 |
| 20160178056 | GAS CYLINDER ACTUATOR WITH OVERTRAVEL SAFETY DEVICE | 06-23-2016 |
| 20110296982 | Packing Nut Lock and Method of Use - An apparatus for preventing a threaded nut from unscrewing from a threaded bore of a device. The threaded nut has a circular periphery containing a plurality of apertures. The apparatus has a body with a first pin configured to insert into one of the apertures of the threaded nut, and a retainer that releasably holds the first pin within the aperture. | 12-08-2011 |
| 092168000 | Non-metallic seal means between piston or member and end portion | 18 |
| 20080216646 | Piston seal member and disc brake using the piston seal member - The piston seal member is formed of a crosslinked rubber composition, the rubber composition including 100 parts by weight of an ethylene-propylene rubber, 20 to 60 parts by weight of a first carbon black, 50 to 100 parts by weight of a second carbon black, and 5 to 20 parts by weight of carbon nanofiber having an average diameter of 0.5 to 500 nm, the total amount of the first carbon black and the second carbon black being 70 to 160 parts by weight. The first carbon black has an average particle diameter of 35 to 100 nm and a DBP absorption of 50 to 200 ml/100 g. The second carbon black has an average particle diameter that is greater than the average particle diameter of the first carbon black and ranges from 60 to 500 nm and a DBP absorption of 5 to 50 ml/100 g. | 09-11-2008 |
| 20080223210 | Reciprocating Piston Machine - A reciprocating piston machine, such as an air-conditioning compressor for motor vehicles, having a housing, a a rotationally drivable shaft, a shaft sealing device, in particular a mechanical shaft seal, at least one radial shaft bearing, especially a radial rolling-contact bearing, and at least one axial shaft bearing, in particular an axial rolling-contact bearing, a bearing sleeve which accommodates at least the radial shaft bearing, being configured within an opening in the housing, extending into the same. | 09-18-2008 |
| 20080276799 | ALUMINUM PISTON WITH AN INCORPORATED SEAL - In order to reduce product weight, enhance design freedom, reduce production cost and improve productivity, an aluminum piston with an incorporated seal is provided, the piston comprising an aluminum die-cast piston main body ( | 11-13-2008 |
| 20090071325 | CYLINDER DEVICE - A cup seal | 03-19-2009 |
| 20090114086 | Reciprocating Gas Compression Installation with Controlled Leakage Rate - The invention relates to a reciprocating installation ( | 05-07-2009 |
| 20090260516 | SEALING STRUCTURE FOR FLUID PRESSURE DEVICE - A sealing mechanism is mounted at an end section of a cylinder tube, which configures a cylinder device, by having a step section in between, and the sealing mechanism is sandwiched between the cylinder tube and a rod cover. The sealing mechanism includes a thin plate formed of a metal material, and a sealing member attached to one side surface of the plate. The plate and the sealing member are integrally arranged. | 10-22-2009 |
| 20090272260 | Pressure attenuated pump piston - A pump piston assembly for use with a high-pressure pump includes a first section extending axially from a first end, a second section positioned adjacent to the first section and extending axially towards a second end, and an attenuation feature disposed within the piston bore such that the attenuation feature is part of the second end. By integrating the attenuation feature directly into the pump piston, pressure spikes, such as pressure peaks and valleys of an oscillatory pressure wave originating from the reciprocating motion of the piston, may be compensated directly in a supply pressure chamber. By providing a variety of attenuation features, such as a ball/spring assembly, an elastomer insert, an elastomer insert/internal piston assembly, and an elastomer insert/spring/ball assembly, attenuation for applications with a variety of frequencies and pressures can be utilized. | 11-05-2009 |
| 20100192766 | CYLINDER APPARATUS - A piston connected with a piston rod is fitted in an outer tube having a hydraulic fluid sealed therein, with the piston rod projecting out of the outer tube. A seal part for the piston rod includes a rod guide, a seal case, an oil seal, a dust seal and a securing member, which are inserted into an end portion of the outer tube and secured by first and second staked portions. The sliding part of the piston rod is sealed with the rod seal and a seal lip of the oil seal. The area between the seal case and the outer tube is sealed with an O-ring and a seal member. The pressure resistance of the seal part can be increased to a considerable extent by two-point staking by the first and second staked portions and two-stage sealing by the rod seal and the oil seal. | 08-05-2010 |
| 20110030553 | HYDRAULIC CYLINDER AND METHOD FOR THE MANUFACTURE THEREOF - A hydraulic cylinder comprising:
| 02-10-2011 |
| 20110197757 | Wiper Arrangement and Compressor with such a Wiper Arrangement - Conventional wiper arrangements with cut rings suffer from unavoidable leakage and, in particular in an embodiment as metallic wiper ring with a sharp wiping edge, scratch on the surface of the piston rod which can be damaged in this manner. In order to eliminate these problems, a wiper arrangement with a wiper ring | 08-18-2011 |
| 20120118141 | PLUNGER-TYPE MEASURING PUMP - A plunger-type measuring pump in which a pump head | 05-17-2012 |
| 20120325083 | PISTON GUIDE RING COMPRISING POLYAMIDE-POLY(ARYLENE ETHER) COMPOSITION - A piston guide ring for use in a piston-cylinder assembly includes a compatibilized polyamide-poly(arylene ether) blend. The compatibilized polyamide-poly(arylene ether) blend includes about 35 to about 95 parts by weight polyamide and about 5 to about 65 parts by weight poly(arylene ether), based on 100 parts by weight total of the polyamide and the poly(arylene ether). The piston guide rings provide improved compressive strength at elevated operating temperatures, more isotropic mold shrinkage, and reduced moisture absorption compared to piston guide rings prepared from polyamide. | 12-27-2012 |
| 20130199365 | Annular Seal Element - An annular seal element is configured to seal off a pressurized region filled with a fluid. The annular seal element has one end face which is pressed onto a contact surface of a piston. The end face is formed with a sealing contour in such a way that the sealing contour is elastically deformable on the contact surface by the pressure exerted. | 08-08-2013 |
| 20140318366 | HYDRAULIC CYLINDER AND METHOD FOR THE MANUFACTURE THEREOF - A hydraulic cylinder may include a cylinder body having an open end with an opening, a piston rod movable back and forth, a close-off member having an insert part protruding in a fitting manner into the open end of the cylinder body, the close-off member having a flange opposing the edge of the cylinder body, a coupling means operable between the inner surface of the cylinder body and the outer circumferential face of the insert part to secure, in at least one axial direction, the close-off member in the cylinder body, the coupling means including a radially-compressible coupling ring, and a clamping ring clamped between the flange and the edge at the open end of the cylinder body, the clamping ring being made of a resilient, compressible material, the clamping ring being clamped, when compressed in the axial direction, between the flange and the edge at the open end. | 10-30-2014 |
| 20140345451 | Method And Device For Fixing And Synchronising Rotary Pistons In A Rotary Piston Pump - A method and a device for fixing and synchronising rotary pistons in a rotary piston pump are disclosed. The rotary pistons are introduced into the pump space of the rotary piston pump. A shaft stub of each rotary piston is then pushed through a pump rear wall onto a driveshaft provided for the respective rotary piston. The rotary pistons are aligned and synchronised in the pump space by means of a template, the template being fixed detachably to a pump housing. The shaft stubs of the respective rotary piston are connected, after the synchronisation, in each case by means of a clamping device in a friction-locked manner to the respective driveshaft, outside the pump space. | 11-27-2014 |
| 20150040751 | Stirling Cycle Machine - A rod seal assembly. The rod seal assembly includes a housing between two spaces configured to receive a reciprocating rod, the reciprocating rod disposed within a first space and a second space, a floating bushing configured to move axially and radially within the housing and disposed coaxially around the reciprocating rod, a rod seal configured to seal the outside diameter of the reciprocating rod relative to an inside surface of the floating bushing, and at least one stationary bushing fixed within the housing that may form a seal with the floating bushing to the axial flow of fluid in the presence of a pressure difference between the two spaces. | 02-12-2015 |
| 20150377356 | PACKING ASSEMBLY FOR A PUMP - A header ring for use in a stuffing box comprising an annular body portion of an elastomeric material, an annular radially inward projecting sealing lip portion formed on said body portion and an annular, axially facing pedestal portion formed on said body portion, said pedestal portion defining an annularly extending radially inwardly facing pedestal surface, the sealing lip portion defining an annularly extending, radially inward facing sealing surface, the sealing surface and the pedestal surface forming a juncture, at least a portion of the pedestal portion adjacent the juncture and forming the pedestal surface and at least a portion of the sealing lip portion adjacent the juncture and forming a portion of the sealing surface being comprised of a layer of reinforced elastomeric material bonded to the body portion. | 12-31-2015 |
| 20160084247 | High Pressure Pump - A high pressure fuel pump unit includes a pump head, a cam-follower, a plunger extending along a longitudinal axis from a first extremity slidably arranged in a pumping bore of the pump head to a second extremity cooperating with the cam-follower lubricated by oil and, a spring compressed between the pump head and the cam-follower. The pump unit further includes an annular seal arranged around the plunger and fixed to the pump head in order to prevent mixing of fuel with oil. | 03-24-2016 |
| 092165000 | Prevent rotation | 1 |
| 20090107328 | Reciprocating Pump - A reciprocating pump ( | 04-30-2009 |
| 20090158924 | PISTON PUMP - The present invention relates to a piston pump for feeding a fluid, having a piston and a pressure chamber which is arranged between an inlet valve and an outlet valve. The inlet valve has a closing element, a spring element for restoring the closing element, and a holding device. The holding device has a holding region for holding and supporting the spring element and an integrally formed sealing region in order to seal the pressure chamber with respect to a low-pressure region of the piston pump. The sealing region is of annular design and has a parting gap which is closed in an installed state. | 06-25-2009 |
| 20100031814 | CLAMPING LEVER AND END CAP FOR RODLESS CYLINDERS - The present invention relates to an end cap for a rodless cylinder ( | 02-11-2010 |
| 20100071546 | CYLINDER APPARATUS - A cup seal | 03-25-2010 |
| 20100071547 | CYLINDER APPARATUS - A cup seal | 03-25-2010 |
| 20100206162 | RAM BEARING ASSEMBLY, SEAL ASSEMBLY THEREFOR AND ASSOCIATED METHOD - As seal assembly for a ram assembly is provided. An elongated ram extends through the seal assembly. The seal assembly includes a housing body, a plurality of seals and a retaining, and compression, device. The seals, as well as a male energizer and a female energizer, each have a split body. In this configuration, the seals and energizers may be replaced without removing the seal assembly housing body and retaining device from about the ram. This further allows for the ram to remain in place during seal replacement. That is, the split seals may be separated an placed about the ram. Once in place, the ends of the split seal are joined at an interface. The retaining/compression device compresses the seals so that the interface is sealed. | 08-19-2010 |
| 20100326269 | CYLINDER APPARATUS AND METHOD OF MANUFACTURING CYLINDER APPARATUS - A metallic protecting cover is formed from two axially split members, i.e. a first protecting cover member secured to a mounting eye, and a second protecting cover member having an overall length shorter than that of each of first and second cylinders and having a predetermined gap between itself and the second cylinder. The second protecting cover member is press-fitted into the first protecting cover member secured to the mounting eye to integrate the first and second protecting cover members into the protecting cover. Accordingly, the lower end of the second cylinder can be caulked in a state where the second protecting cover member has been temporarily assembled to the second cylinder. Thus, it is possible to ensure the required strength of the protecting cover and to increase the degree of freedom in assembly process. | 12-30-2010 |
| 20110011257 | ELECTRO-HYDRAULIC ACTUATOR HAVING END CAP WITH SPLIT BUSHING - An electro-hydraulic actuator includes a hydraulic pump, an electric motor operable for driving the hydraulic pump, a piston/rod assembly that is movable in response to fluid from the hydraulic pump, and a housing. A portion of the housing defines a cylinder bore within which a piston of the piston/rod assembly is located. The electro-hydraulic actuator also includes an end cap for closing an end of the cylinder bore and through which a rod of the piston/rod assembly extends. The end cap includes a bushing for supporting movement of the rod through the end cap. The bushing has an axially extending split and is adapted to be under compression when installed in the end cap. | 01-20-2011 |
| 20110067564 | HYDRAULIC CYLINDER - A hydraulic cylinder includes a piston unit inside a cylinder to be free to slide within the cylinder; and a piston rod having the piston unit fixed to one end thereof and another end thereof projecting from the cylinder. The piston unit is inserted into a small diameter portion of the piston rod with an end surface thereof fixedly contacting a shoulder end surface of the piston rod. A round portion is formed as an annular concave in a base end portion outer periphery of the small diameter portion of the piston rod. A tapered portion is formed on an inner periphery of the piston unit from the end surface in alignment with a portion formed by concaving the small diameter portion. A length of the tapered portion in a piston unit axial direction is equal or greater than a length of the concave portion in a piston rod axial direction. | 03-24-2011 |
| 20110107909 | PISTON SEAL GUIDE BEARING - A priming piston reciprocating pump | 05-12-2011 |
| 20110120298 | SLAVE CYLINDER - A slave cylinder inside a hydraulic section for clutch actuation. The slave cylinder is arranged concentrically about a transmission input shaft in the region of two different diameters that come in direct contact with each other. In order to create a slave cylinder with a compact design, despite unfavorable space conditions, the ratio of 2:1 between the mean housing diameter and the necessary guide length can be implemented, both the inner surface of the housing directed toward the transmission input shaft and the piston are congruent in the longitudinal section with the outer shape of the stepped transmission input shaft such that the piston is guided in the housing at the inside diameter on the clutch-side end and at the outside diameter on the transmission-side end. | 05-26-2011 |
| 20110185890 | SEALING MEMBER FOR MASTER CYLINDER AND MASTER CYLINDER HAVING THE SAME - Disclosed is a sealing member for a master cylinder and the master cylinder having the same, capable of shortening the delay in the release operation of the hill start assist control system. The sealing member includes an outer blade making contact with the cylinder body and an inner blade making contact with the outer surface of the piston. The inner blade includes a circumferential fluid path extending in a circumferential direction of the inner blade and a plurality of axial fluid paths connected to the circumferential fluid path. | 08-04-2011 |
| 20110192278 | FLUID PRESSURE CYLINDER - When a fluid pressure cylinder ( | 08-11-2011 |
| 20110197756 | Wiper Arrangement and Compressor with such a Wiper Arrangement - Conventional wiper arrangements with cut rings suffer from unavoidable leakage and, in particular in an embodiment as metallic wiper ring with a sharp wiping edge, scratch on the surface of the piston rod which can be damaged in this manner. In order to eliminate these problems, a wiper arrangement is proposed in which the radially inner circumferential surfaces | 08-18-2011 |
| 20110283880 | FLUID PRESSURE APPARATUS - In a fluid pressure apparatus, a packing includes an annular seal member made of an elastic material, and support rings made of a low-friction material, which are mounted on an outer circumference of the seal member. The seal member includes, on an outer circumference thereof, a sealing projection that contacts an inner surface of the slide hole. The support rings are disposed on both sides of the sealing projection, and protrude beyond the seal member in the axial direction. Outer circumferential surfaces of the support rings always contact the inner circumferential surface of the slide hole. When a transverse load does not act on a piston as a partitioning member, the inner circumferential surfaces of the support rings do not contact the outer circumference of the piston. When a transverse load acts on the piston, the inner circumferential surfaces of the support rings contact the outer circumference of the piston. | 11-24-2011 |
| 20120103182 | Slide Parts and Equipment Including Same - It is an objective of the invention to provide a slide part in which a seal member formed of an elastic body is in sliding contact with a hard member. There is provided a slide part comprising: a hard member having an amorphous carbon coating containing nitrogen formed on an outermost surface of a substrate; and a seal member formed of an elastic body, the seal member being in sliding contact with the hard member, wherein: content of the nitrogen in the coating is 3 at. % or more and 25 at. % or less, taking a total content of the carbon and the nitrogen in the coating as 100 at. %; the seal member contains fluorine at least in a sliding contact surface region thereof; and content of the fluorine in the surface region of the seal member is equal to or more than the nitrogen content in the coating. | 05-03-2012 |
| 20120118140 | JOIN CONNECTION FOR A PISTON GUIDING UNIT IN A HOUSING - Join connection for a piston guiding unit, preferably made from steel, in which a piston, in particular a brake or pump piston, is guided movably. The piston guiding unit is screwed to a housing which is preferably produced from aluminum, and the thread of the screw connection has a thread-forming contour. | 05-17-2012 |
| 20120152111 | PLUNGER PACKING WITH WEDGE SEAL HAVING EXTRUSION RECESS - A seal assembly is disposed in an annular recess in a cylinder chamber between a pump cavity and a pump exterior. The seal assembly includes a main seal and a back-up seal and seals to a pump plunger disposed within the cylinder chamber. The back-up seal includes an extrusion recess extending from a surface of the back-up seal adjacent the main seal along an inner or an outer diameter of the back-up seal. During pumping operations the plunger strokes through the cylinder chamber causing the main seal to extrude into the extrusion recess to form a seal between the plunger and the cylinder chamber. | 06-21-2012 |
| 20120160093 | AIR CYLINDER - An air cylinder having a simple and effective configuration to reduce the axial length and provide ease of processing. A sliding bearing that guides a piston rod is disposed at a position adjacent to a groove in which a rod packing is fitted. One end of the sliding bearing serves as the side wall of the groove and prevents displacement of the rod packing. The other end of the sliding bearing extends so as to cover part of a yenta of a first port. An orifice having a sectional area smaller than that of the yenta is formed at the position of the yenta by the sliding bearing. | 06-28-2012 |
| 20120210868 | PACKING ASSEMBLY FOR A PUMP - A header ring for use in a stuffing box comprising an annular body portion of an elastomeric material, an annular radially inward projecting sealing lip portion formed on said body portion and an annular, axially facing pedestal portion formed on said body portion, said pedestal portion defining an annularly extending radially inwardly facing pedestal surface, the sealing lip portion defining an annularly extending, radially inward facing sealing surface, the sealing surface and the pedestal surface forming a juncture, at least a portion of the pedestal portion adjacent the juncture and forming the pedestal surface and at least a portion of the sealing lip portion adjacent the juncture and forming a portion of the sealing surface being comprised of a layer of reinforced elastomeric material bonded to the body portion. | 08-23-2012 |
| 20120216673 | Coiled Felt Seal (CFS) Sealed Piston of Hydraulic Cylinder - Pistons and piston rods of hydraulic cylinders are fitted with coiled felt seal (CFS) in place of rubber O-rings for the sealing of the cylinders. The resulting piston-cylinder mechanical device has a simpler structure, lesser number of components without the multiple rubber O-rings, improved durability and higher performance with extreme temperature tolerance, enhanced internal pressure capacity, reduced power loss due to reduced piston-cylinder friction, and significantly reduced leakage. | 08-30-2012 |
| 20120260798 | Piston Assembly for Gyratory Crusher - A piston assembly for a gyratory crusher that contains designed wear parts comprising an upper piston bushing, a lower piston bushing, a piston wear ring and a hydraulic seal. All the wear parts can be replaced without access to the underside of the crusher | 10-18-2012 |
| 20120279388 | Sealing Ring, in Particular for a Hydraulic Piston Pump - A sealing ring, in particular for a hydraulic piston pump, for sealing a pressure chamber which is filled with a fluid is disclosed. A sealing lip having a contour contacts a sealing surface and is movable relative thereto. The contour of the sealing lip is adapted according to the speed of the sealing lip relative to the sealing surface, such that a defined leakage of the fluid out of the pressure chamber is adjusted. | 11-08-2012 |
| 20130087039 | GASKETLESS HIGH PRESSURE CONNECTION - A sealing system for a high pressure pump, in which the pump includes a vessel defining a vessel bore and having an end portion, the vessel bore having a first engagement face and defining a central longitudinal axis, and in which the pump further includes a plunger cooperative with the vessel to increase the pressure of a fluid within the bore, includes a seal member at least partially received within the bore and defining a second engagement face. The sealing system further includes a retaining member in operative contact with the seal member to mate the first engagement face with the second engagement face to inhibit fluid leakage from the bore. The first engagement face includes a first contacting surface having a non-linear cross-section. The second engagement face includes a second contacting surface having a non-linear cross-section in contact with the first contacting surface. | 04-11-2013 |
| 20130152779 | SHAFT ARRANGEMENT FOR AN AXIAL PISTON PUMP ASSEMBLY - A shaft arrangement for an axial piston pump assembly to couple to a rotatable member such as a gear therewith. A shaft extends at least partially through a housing chamber of the pump about a longitudinal axis. Reciprocating pistons are disposed within the chamber radially about the shaft. A cam unit is fitted over the shaft and provides an angled camming surface to engage the pistons. Bearing assemblies are fitted over the cam unit. An adapter can be fitted over the proximal end of the cam unit. The adapter has a distal surface which may abut the bearing assembly and be axially spaced from the cam unit, and an outer radial surface to engage the rotatable member. A clamping device provides a desired clamp load path between the rotatable member, the adapter, the cam unit, the bearing assemblies and the shaft. | 06-20-2013 |
| 20130152780 | Installation Assembly with Sealing Apparatus - A sealing apparatus for an installation assembly, which installation assembly serves for accommodating a measuring insert, wherein the sealing apparatus includes a piston, a bushing and at least one sealing element. The piston and the bushing serve to accommodate the measuring insert by a bore provided in the piston and in the bushing, wherein the piston is additionally connected interactively with the bushing in such a manner that a pressure transmitted by the piston to the bushing serves to deform the sealing element, which is preferably arranged on at least one end of the bushing, and thereby to achieve a sealing action, in order, in the case of introduced measuring insert, to seal the bore, especially liquid or gas tightly. | 06-20-2013 |
| 20130167714 | METHODS AND SYSTEMS FOR MANAGING A CLEARANCE GAP IN A PISTON ENGINE - A piston engine may include a non-contact bearing between a piston assembly and a cylinder. The piston may be configured to translate in a bore of the cylinder, and a non-contact bearing may be included in a clearance gap between the piston assembly and the bore. A bearing fluid may be supplied to the clearance gap via the piston assembly and/or cylinder to create the non-contact bearing. A bearing element may be used to direct or otherwise manage the flow of bearing fluid in the clearance gap. The bearing element may include one or more holes, porous portions, and/or passages to direct the bearing fluid to the clearance gap. | 07-04-2013 |
| 20130205993 | ADAPTIVE HYDRAULIC CYLINDER WITH FLOATING SEAL INTERFACE - In one possible implementation, a misalignment-tolerant hydraulic actuator, e.g., for a submersible hydraulic diaphragm insert pump (HDI), has a floating piston that can reciprocate while decoupled from collinearity with a cylinder barrel and a central feed rod that slides through a central axis of the piston. The floating seal can be integrated or provided by a separate insert and provides a pivotable interface between the piston and center rod, allowing these components freedom of motion to avoid elastic deformation, friction, power loss, and early wear when misalignment or transverse forces on an external end of the piston rod are present. Bearing placement can also be selected to eliminate over-constraint. | 08-15-2013 |
| 20130255481 | RAM BEARING ASSEMBLY, SEAL ASSEMBLY THEREFOR AND ASSOCIATED METHOD - As seal assembly for a ram assembly is provided. An elongated ram extends through the seal assembly. The seal assembly includes a housing body, a plurality of seals and a retaining, and compression, device. The seals, as well as a male energizer and a female energizer, each have a split body. In this configuration, the seals and energizers may be replaced without removing the seal assembly housing body and retaining device from about the ram. This further allows for the ram to remain in place during seal replacement. That is, the split seals may be separated an placed about the ram. Once in place, the ends of the split seal are joined at an interface. The retaining/compression device compresses the seals so that the interface is sealed. | 10-03-2013 |
| 20130319220 | Fluid End Reinforced With Abrasive Resistant Insert, Coating Or Lining - A fluid end for use in a high-pressure, reciprocating, fluid pump assembly is provided having a bore therethrough in which a plunger reciprocates. The fluid end is provided with an insert to improve the fluid end washout life. In one embodiment, the insert is constructed of a ceramic material. In another embodiment, the insert includes an abrasive resistant coating or lining. | 12-05-2013 |
| 20130333554 | Seal Assembly for Use in Harsh Environments - A sealing assembly, for example a piston ring, for use in harsh environments, e.g., high radiation levels. The piston ring has an annular sealing surface which together with a member forming a radially outer annular cylinder surface, e.g., a cylinder, forms a seal pocket. Received in the seal pocket is an annular seal comprised of a plurality of wraps of at least one strand of a substantially incompressible and inelastic material such as graphite fiber. The assembly further includes a compression ring and compression assembly which compresses the seal body between the support surface and the compression ring to displace the seal body into sealing engagement with the radially inner and outer sealing surfaces. | 12-19-2013 |
| 20130340609 | PUMP HEAD OUTLET PORT - Pumps used in liquid chromatography applications employ actuators for pressurizing and moving liquid. An actuator includes a pump head having a chamber, a gland, a movable rod extending through the gland into the chamber of the pump head, and a plunger seal disposed in the gland around the rod for sealing against fluidic leakage from the chamber. The plunger seal has an annular flange that provides an OD (outer diameter) seal against the gland. The flange defines a seal cavity. The pump head further includes an outlet port and an outlet channel. One end of the outlet channel is in communication with the outlet port and the other end of the outlet channel opens into the seal cavity of the plunger seal. The outlet channel provides a flow path for liquid in the chamber to travel towards the outlet port in response to movement of the rod. | 12-26-2013 |
| 20150122117 | Device And Method In Respect Of A Rock Drilling Machine And Rock Drilling Machine - A device for a hydraulic rock drilling machine ( | 05-07-2015 |
| 20160052759 | ACTUATOR IN A LIFT TRUCK - An actuator may comprise: cylinder structure, ram structure and a cushioning seal. The cylinder structure may comprise a cylinder tube, a cylinder base and a cylinder cap. The ram structure is slidably mounted within a cylinder structure bore and defines with the cylinder structure a gap therebetween. The ram structure may comprise fluid passageway structure for defining a path for fluid to move internally through the ram structure. The path may communicate with an outlet in a sidewall of the ram structure. The cushioning seal may be located between the ram structure and the cylinder structure and engage the ram structure and the cylinder cap during ram structure extension such that the seal substantially closes off a first portion of the gap extending from the seal toward the cylinder structure outer open end. The cushioning seal may be moved during ram structure retraction in a direction of ram structure retraction such that fluid flowing out of the ram structure sidewall outlet when the outlet is in the gap first portion flows between the seal and the cap. | 02-25-2016 |
| 20160178055 | GAS CYLINDER ACTUATOR WITH OVERTRAVEL SAFETY DEVICE | 06-23-2016 |
| 20160178056 | GAS CYLINDER ACTUATOR WITH OVERTRAVEL SAFETY DEVICE | 06-23-2016 |
| 20110296982 | Packing Nut Lock and Method of Use - An apparatus for preventing a threaded nut from unscrewing from a threaded bore of a device. The threaded nut has a circular periphery containing a plurality of apertures. The apparatus has a body with a first pin configured to insert into one of the apertures of the threaded nut, and a retainer that releasably holds the first pin within the aperture. | 12-08-2011 |
