Class / Patent application number | Description | Number of patent applications / Date published |
138031000 | Piston or plunger type | 50 |
20080230135 | Piston-Type Accumulator - The invention relates to a piston-type accumulator comprising a separating piston (24), which can be axially displaced inside an accumulator housing ( | 09-25-2008 |
20080308168 | COMPACT HYDRAULIC ACCUMULATOR - A lightweight, optimally efficient, easily serviced, piston-in-sleeve high pressure accumulator is provided. The accumulator includes one or more cylindrical composite pressure vessel separate end cap manifolds. A piston slidably disposed in a thin impermeable internal sleeve in the accumulator separates two chambers, one adapted for containing a working fluid and the other adapted for containing gas under pressure. Gas is provided in a volume between the impermeable internal sleeve and the composite pressure vessel wall. Additional gas is optionally provided in gas cylinders. Further components are provided for withstanding harmful effects of radial flexing of the composite vessel wall under high pressures, and from stresses present in use in mobile applications such as with a hydraulic power system for a hydraulic hybrid motor vehicle. | 12-18-2008 |
20080314467 | Piston-in-sleeve hydraulic pressure accumulator - A piston-in-sleeve accumulator includes a cleaning element positioned on the piston and configured to remove and prevent debris from lodging between the piston and a cylindrical nonpermeable sleeve within which the piston slides. A seal on the piston is positioned to engage an opposing surface in the event of a leak, and thereby prevent the possibility of a complete drainage of pressurized fluid from occurring through the accumulator's fluid port. A position contactor switch is further provided to signal position of the piston within the accumulator. | 12-25-2008 |
20090126815 | LIGHTWEIGHT HIGH PRESSURE REPAIRABLE PISTON COMPOSITE ACCUMULATOR WITH SLIP FLANGE - A reduced weight and repairable piston accumulator. The accumulator includes a load bearing metallic cylinder with removable end caps secured thereto with slip flanges for allowing repairability and for achieving the required cycle life. The cylinder serves as the surface on which the piston slides and is designed such that it sustains the axial stress induced by pressurization of the accumulator. A composite over wrapping is designed such that it sustains the stress in the hoop (radial) direction. A stress transitioning bushing can be provided for transitioning hoop stresses between the overwrap and the slip flange. When combined with the cylinder, the fibers of the composite wrap will not be placed in shear and thus will not fatigue in the same manner as some prior art designs. | 05-21-2009 |
20090126816 | LIGHTWEIGHT HIGH PRESSURE REPAIRABLE PISTON TIE ROD COMPOSITE ACCUMULATOR - A lightweight high pressure repairable piston composite tie-rod accumulator that does not use a load bearing metallic liner. An exemplary accumulator includes composite tie rods that sustain the axial stress induced by pressurization of the accumulator, while the shell is designed such that it sustains the stress of pressurization in the hoop direction. The tie rods can be secured using a wedge-type tie rod retention mechanism. As a result, no pretension is applied to the tie rods and the composite shell may be designed entirely for hoop stress. | 05-21-2009 |
20090205731 | Hydraulic accumulator - The invention relates to a hydraulic accumulator, particularly in the form of a suction stream stabilizer, having an accumulator housing ( | 08-20-2009 |
20090293977 | Spring-tensioned Piston Accumulator With Detent Function - A piston accumulator ( | 12-03-2009 |
20090293978 | SPRING-LOADED PISTON ACCUMULATOR WITH LOCKING FUNCTION - A piston accumulator ( | 12-03-2009 |
20100193059 | ACCUMULATOR - To restrain abnormal deformation of a bellows due to a pressure difference between the inside and outside thereof, an outside gas type accumulator includes a pressure difference regulation mechanism ( | 08-05-2010 |
20100288388 | DUCT PROVIDED WITH A DEVICE FOR ABSORPTION OF PRESSURE PULSES - A duct for a hydraulic steering system comprises a pipe for feeding a fluid and a device for absorption of the fluid pressure pulses is provided. In particular, the device defines a chamber which is connected in parallel to the pipe by means of a first and a second connection, a mobile inertial element defining a first and a second compartment inside the chamber, and resilient means acting on the inertial element in order to maintain the inertial element in an intermediate position, such as to define a first and a second compartment inside the chamber and communicating by means of a leakage defined by a passage. | 11-18-2010 |
20110000565 | HYDRAULIC OSCILLATING MOTOR - A hydraulic oscillating motor which has at least two working chambers which are coupled via pressure lines to a device for pressure compensation. A first working chamber is connected to a first pressure line and a second working chamber is connected to a second pressure line. The motor further has a device for pressure compensation with a first compensating cylinder and a second compensating cylinder. Each of the compensating cylinders has in each case one compensating volume and in each case one elastic force store for delimiting the respective compensating volume. The compensating volume of the first compensating cylinder is connected to the first pressure line, and the compensating volume of the second compensating cylinder is connected to the second pressure line. | 01-06-2011 |
20110108148 | BREATHABLE LOW PRESSURE ACCUMULATOR - A breathable low pressure accumulator includes a housing with a cylindrical bore formed therein. A piston slides within the bore and includes an elastic piston head. A biasing member urges the piston towards a first end of the bore. At least one passage communicates between an exterior of the housing and a volume that is enclosed by the bore and the elastic piston head. The elastic piston head is formed of rubber. The elastic piston head is molded into the piston. | 05-12-2011 |
20110226371 | ACCUMULATOR ASSEMBLY - An accumulator assembly is includes a piston located within a pressure canister. The pressure canister has a piston stop therein. The piston stop is located radially outboard of a biasing member or spring located within the pressure canister between the pressure canister and the piston. A support bracket is disposed on an end of the pressure canister in alignment with the spring. The outboard piston stop and the support bracket reduce the stresses due to reaction forces when the accumulator assembly is fully charged. By reducing the stresses due to reaction forces, the accumulator assembly can be made from steel casting or plastic molding without sacrificing the charge capacity of the accumulator assembly. | 09-22-2011 |
20110226372 | SIDE GRIPPING MECHANISM AND DEVICE HANDLERS HAVING SAME - An apparatus comprises a cavity coupled to a pneumatic controller configured to control pressure in the cavity; a piston configured to be pulled into the cavity when pressure in the cavity is below atmospheric pressure and to be pushed outward when pressure in the cavity is greater than atmospheric pressure; and a gripper arm mechanically coupled to the piston. The gripper arm may be configured to support a device under test. The gripper arm may be coupled to the piston through a pusher bar. The apparatus may further comprise a pneumatic control port; and a pneumatic bleed port. The pneumatic control port is coupled to the cavity, and the pneumatic bleed port is configured to bleed pneumatic pressure to atmosphere if the piston over-travels a predetermined position. | 09-22-2011 |
20110277863 | LOW PRESSURE ACCUMULATOR FOR ANTI-LOCK BRAKE SYSTEM - Disclosed is a low pressure accumulator for an anti-lock brake system of a vehicle. The low pressure accumulator includes a cylinder having one end communicated with a fluid path connected to a valve and a pump and an opposite end formed with an opening, a piston moving back and forth in the cylinder, a spring installed in the cylinder to elastically support the piston, and a plug installed in the opening of the cylinder to support one end of the spring. The plug includes a vent to ventilate air through an inside and an outside of the cylinder. | 11-17-2011 |
20110308654 | DAMPER ARRANGEMENT AND METHOD FOR DESIGNING SAME - A damper arrangement ( | 12-22-2011 |
20120042976 | FLUID MANIFOLD - A hydraulic accumulator | 02-23-2012 |
20120067446 | ULTRA LIGHTWEIGHT AND COMPACT ACCUMULATOR - An accumulator assembly comprises an accumulator cylinder formed of a cylindrical, gas-impermeable shell and a cylindrical gas-impermeable sleeve disposed within and substantially concentric with the shell. An interstitial space is formed between the sleeve and the shell. A piston slidably is disposed within the sleeve, the piston separating an interior of the sleeve into a first chamber configured to contain a compressed gas, and a second chamber configured to contain a pressurized fluid. A pair of removable axial closures retained to the gas-impermeable sleeve at opposing ends and sealingly engaged with corresponding opposing ends of the gas-impermeable shell is configured to provide maximum resistance to the tensional stress of the sleeve. | 03-22-2012 |
20120085450 | ACCUMULATOR ASSEMBLY - An accumulator assembly for a motor vehicle powertrain includes an armature and a follower. Together the armature and the follower can selectively lock together. The accumulator assembly may include a biasing member and a solenoid. When the solenoid is de-energized, the biasing member pushes the armature towards the follower to lock the armature and the follower together. When the solenoid is energized, the armature is magnetically drawn towards the solenoid and away from the follower to unlock the two components and to compress the biasing member. | 04-12-2012 |
20120085451 | HYDRAULIC ACCUMULATOR - A hydraulic accumulator includes a cylindrical body or housing having male or external threads on each end and shoulders proximate the ends of the threads nearer the center of the cylindrical body or housing that act as stops. An end cap having internal or female threads is disposed at one end of the accumulator. The accumulator may be threaded into a manifold or control valve assembly or it may include a second threaded end cap having an access, i.e., inlet/outlet, port. A piston resides within the accumulator and is biased by a pair of compression springs toward the manifold, control valve body or second threaded end cap. | 04-12-2012 |
20120103452 | PEDAL SIMULATOR - A pedal simulator includes a cylinder mechanism for absorbing a fluid pressure generated in a pressurization chamber of a master cylinder by operating a brake pedal. The cylinder mechanism includes a housing, a piston slidably held in the housing and defining a fluid chamber for introducing a working fluid thereinto, and a plurality of spring members for urging the piston toward the fluid chamber. The housing includes an open end on an opposite side of the housing from the piston, and a lid member which covers the open end. The lid member is composed of a member separate and distinct from the housing. The lid member is provided with a damper made of a rubber member. | 05-03-2012 |
20120216900 | INTEGRATED HYDRAULIC ACCUMULATOR ARRANGEMENT - A compact and light-weight hydraulic accumulator configuration for a hydraulic brake includes a high-pressure storage chamber, a medium-pressure storage chamber and an atmospheric-pressure storage chamber. The high-pressure storage chamber, the medium-pressure storage chamber and the atmospheric-pressure storage chamber are disposed in a common housing which delimits the high-pressure storage chamber along with a high-pressure piston movably guided within the housing while delimiting the medium-pressure storage chamber along with a medium-pressure piston movably guided within the housing. A high-pressure spring located in the housing rests on the high-pressure piston outside the high-pressure storage chamber and a medium-pressure spring located in the housing rests on the medium-pressure piston outside the medium-pressure storage chamber. | 08-30-2012 |
20120298240 | HYDRAULIC DAMPING APPARATUS - A hydraulic damping apparatus comprising a conduit for a hydraulic fluid having a port in a wall of the conduit; a resonator having a chamber and a neck, the neck being arranged to provide fluid communication between the chamber and the port. The apparatus further comprises a first pressure sensor arranged to sense pressure in the conduit upstream of the port, a second pressure sensor arranged to sense pressure in the conduit downstream of the port, and a controller configured to determine the amplitude of a pressure fluctuation sensed by the first pressure sensor and the amplitude of a pressure fluctuation sensed by the second pressure sensor. The controller is further configured to vary a resonant frequency of the resonator in accordance with a difference between the amplitude of the pressure fluctuation sensed by the first pressure sensor and the amplitude of the pressure fluctuation sensed by the second pressure sensor. | 11-29-2012 |
20120305120 | PRESSURE-COMPENSATED ACCUMULATOR BOTTLE - A pressure-compensated accumulator bottle is provided. In one embodiment, the accumulator bottle includes a housing and an interior wall that generally define first, second, and third chambers within the housing. In this embodiment, a spring is disposed in the second chamber and configured to apply a biasing force on a first piston disposed within the first chamber. Further, in this embodiment, an additional piston is disposed within the third chamber and is configured to facilitate balancing of the pressure of a fluid disposed in the second chamber with the pressure of the external environment such that the magnitude of a second biasing force applied on the first piston by the pressure of the fluid depends at least in part on the pressure of the external environment. Hydraulic circuits and systems including a pressure-compensated accumulator bottle are also disclosed. | 12-06-2012 |
20120312406 | Automatic Transmission Fluid Accumulator Replacement Assembly - A fluid accumulator assembly used with 2002 to 2005 model years of ZF Getriebe GmbH ZF-6HP19, ZF-6HP26, ZF-6HP32 automatic transmissions, and model years up to 2011 of Ford 6R60 automatic transmissions. The fluid accumulator assembly includes a piston that can be received into a bore that is in fluid communication with a solenoid-controlled fluid circuit of the transmission. The fluid accumulator assembly also includes a compression spring sized and configured to fit within the piston, and used to provide an urging force to the piston. | 12-13-2012 |
20130019980 | Accumulator with single direction seal - A depth compensated subsea accumulator with a cylinder with a cylinder end, a first larger bore, a cylinder shoulder and a second smaller bore, a piston sealingly and slidably engaging the first large bore with a single direction seal and having a rod attached to a first side, the rod sealingly and slidably engaging the second smaller bore, the piston having a working fluid on the first side and a compressed gas on the second side, the working fluid on the first side of the piston having a higher pressure than the gas on the second side of the piston while the piston is moving between the cylinder end and the cylinder shoulder, when the piston sealingly engages the cylinder shoulder, a portion of the working fluid on the first side of the piston within a seal diameter having a lower pressure than the gas on the second side of the piston and a portion of the working fluid on the first side of the piston outside the seal diameter having a higher pressure than the gas on the second side of the piston, such that the single direction seal always encounters pressure from the same direction. | 01-24-2013 |
20130048126 | PISTON ACCUMULATOR - A piston accumulator, having a pressure vessel; a cylinder, which is situated within the pressure vessel; an interspace formed between the pressure vessel and the cylinder; and a separating piston, which is provided movably in the cylinder; in which a hydraulic fluid acts upon on a first side of a separating piston, and a gas acts upon a second side of the separating piston; and in which the gas is in fluidic connection to the interspace and the hydraulic fluid is in fluidic connection to a connection on the cylinder. | 02-28-2013 |
20130048127 | Temperature Adaptive Fluid Damping System - A temperature adaptive fluid damping system is provided. One embodiment of the temperature adaptive fluid damping system comprises two fluid chambers, a piston in fluid communication with the fluid chambers, and a fluid path between the fluid chambers. An elastomeric retaining element adjacent to the fluid path is constrained to deform substantially perpendicular to the fluid path, so that the retaining element is operable to vary the cross-sectional area of the fluid path inversely to a change in temperature. | 02-28-2013 |
20130068333 | DUAL PISTON ACCUMULATOR - The invention relates to a dual piston accumulator which is provided, in particular, in a hydrostatic hybrid-drive system for vehicles to replace a high pressure hydro accumulator and a low pressure hydro accumulator, wherein, inside a single accumulator housing ( | 03-21-2013 |
20130074967 | HYDRAULIC ACCUMULATOR - A hydraulic accumulator includes a housing with a pair of ends, a piston slidably disposed in the interior of the housing, and a biasing member that urges the piston towards one end of the housing. The accumulator further includes a fluid flow control device in communication with a fluid chamber defined by a face of the piston and the interior surface of the housing. The desired amount of fluid entering and exiting the fluid chamber is controlled by the fluid flow control device according to the desired pressure within the fluid chamber as determined by a pressure sensor which is also in communication with the fluid chamber. | 03-28-2013 |
20130098492 | WATER HAMMER ARRESTER - A water hammer arrester and a process for making a water hammer arrester. The arrester includes a includes a cylindrical tube that contains a sliding piston separating the interior into a gas portion and a liquid portion. The gas portion is enclosed by a cap. The liquid portion has a pipe fitting for connection to a liquid-carrying pipe. The process includes assembling the piston, cylinder, fitting, and cap together outside of a pressured chamber used to charge the gas portion. A pressure chamber receives the cap and open end of the cylinder, and tabs around the cap allow fluid flow into the gas portion of the cylinder. Increasing gas pressure in the pressure chamber simultaneously increases gas pressure inside the gas portion. At this raised pressure, an ultrasonic welding horn engages the cap and/or cylinder to weld the two together trapping the gas therein under pressure. | 04-25-2013 |
20130153073 | DISTRIBUTED PISTON ELASTOMERIC ACCUMULATOR - The present invention is a distributed piston elastomeric accumulator which stores energy when its elastomeric member stretches from its original length in response to the flow of a pressurized fluid. The stored energy is returned when the fluid flow is reversed and the accumulator discharges the fluid as its elastomeric member returns to its original length and moves the piston to its initial position. At least one part of the novelty of the invention is that the accumulator is not subject to radial strain gradients and the accumulator allows for precise pressure and linear position measurements. Accordingly, the invention allows for optimization of the energy strain storage capacity of a given elastomer. | 06-20-2013 |
20130269815 | PRESSURE DAMPING DEVICE FOR BRAKE SYSTEM - There is provided a pressure damping device for a brake system. According to an embodiment of the present invention, an air damping space whose volume is changed in accordance with pressure is provided in an oil passage for connecting two hydraulic circuits, thereby reducing a pressure pulsation generated by a liquid pressure. | 10-17-2013 |
20130269816 | PRESSURE DAMPING DEVICE FOR BRAKE SYSTEM - There is provided a pressure damping device for a brake system. The damping device includes a cylindrical housing that is fixed to the oil passage, includes a first liquid pressure hole and a second liquid pressure hole respectively communicating with a main oil passage of the first and second hydraulic circuits, and is opened on one side thereof, a lid member that is coupled so as to close the opened one side of the housing, first and second pistons that are spaced apart from each other and move forward and backward within the housing, and a spring that is interposed between the first and second pistons to provide an elastic force to the first and second pistons. Here, a sealing member is provided on an outer circumferential surface of each piston so that a space between the first and second pistons is sealed, and an air damping space whose volume is changed in accordance with a pressure of a liquid pressure is provided between the first and second pistons. | 10-17-2013 |
20130299029 | WATER HAMMER ARRESTER - A water hammer arrester for installation into a water pipeline, the water hammer arrester including an inlet for receiving water from the water pipeline, an outlet for returning the water to the water pipeline, a body connecting the inlet and the outlet, and a piston assembly positioned in the body to allow water to flow from the inlet to the outlet between the piston assembly and the body, wherein the piston assembly is adapted to absorb pressure variations in the water pipeline to thereby at least partially reduce water hammer in the water pipeline in use. | 11-14-2013 |
20130340871 | PRESSURE ACCUMULATOR - A pressure accumulator includes a housing having a housing cavity, a piston axially displaceable in the housing cavity between a first final position and a second final position and having a pressure surface which together with a wall of the housing cavity delimits at least partially a reservoir connectable to an ICE consumer in a fluid-conveying manner, an energy store cooperating with the piston, the piston being displaceable against the force of the energy store from the first final position into the second final position in that the reservoir is acted on by pressure using a pressure medium, and a locking device for locking the piston in the second final position. A locking tube is connected to the piston and supported within the housing in an axially shiftable manner, and lockable at an end of the housing facing away from the reservoir with the aid of a locking pin. | 12-26-2013 |
20140130924 | COMPOSITE ACCUMULATOR HAVING METAL INSERT - A composite accumulator includes a base defining a first cavity and having a closed end, an open end, and a fluid port in communication with the first cavity for communicating a hydraulic fluid in or out of the first cavity, a cover disposed over the open end of the base, the cover defining a second cavity, an insert disposed within the second cavity, a piston disposed within the first cavity and the second cavity, the piston sealed to the insert and translatable along an axis, and a biasing member disposed axially between the piston and the insert, the biasing member configured to bias the piston towards the base. Both the base and the cover are a plastic and the insert is a metal. | 05-15-2014 |
20140130925 | PRESSURE CONTROL RESERVOIR WITH CHECK VALVE - A pressure control reservoir includes a valve ball and a shaft which is movable to move the valve ball to open or close a fluid path leading to a fluid reservoir chamber. The shaft has a tip with a slant surface which has a peripheral edge of a polygonal shape with even numbers of vertices and is inclined to the longitudinal center line of the shaft. Such a polygonal geometry increases an entire or inclined length of the slant surface, which results in an increased range where an angle which the slant surface makes with a plane extending perpendicular to an axial direction of the tip is permitted to be increased without causing the point of contact between the valve ball and the slant surface to be shifted close to the tip of the slant surface when the tip of the shaft moves the valve ball. | 05-15-2014 |
20140230940 | OIL WELL SUCKER ROD SHOCK ABSORBER - An improved oil well sucker well shock absorber assembly having a cylindrical outer casing, a spring disposed therewithin, a plurality of apertures extending through the casing and allowing fluid communication with upwardly extending slidably disposed threadedly connected piston plunger rod device. Unwanted play and travel and its associated wear can be minimized by force dissipation through the associated spring within the casing. This improvement provides a stronger and more reliable connection between the plunger rod and the piston plunger connected thereto providing better load distribution and a more secure connection. | 08-21-2014 |
20140261828 | In-Line Water Hammer Arrester - An in-line water hammer arrester comprises a housing connectable at each end to a piping system, a fluid channel disposed within the housing to permit fluid to flow from the piping system through the housing and back into the piping system, a piston and a pressurized gas chamber. When a pressure spike occurs, the piston is pushed against the pressurized gas chamber allowing an expanded area for water flow until the pressure spike is dissipated and the piston returns to its resting position. When used with flexible hoses and tubing typically found with household appliance water supply lines, the in-line arrester is easily installed by a crimping or clamping type connector and takes up little space. | 09-18-2014 |
20140318655 | HYDRAULIC ACCUMULATOR - A hydraulic accumulator, comprising a base body ( | 10-30-2014 |
20140332106 | ACCUMULATOR - In an accumulator having an accumulator housing which is provided with an oil port connected to a pressure piping of equipment, and an inner portion of the accumulator housing being sectioned into a gas chamber filling with gas and a fluid chamber communicating with the oil port by a bellows and a bellows cap, the bellows cap seals the fluid chamber by coming into contact with a seal on the basis of movement in a stroke in the case that a pressure of the pressure piping is decreased, and the seal is retained by a seal retaining portion which is provided in an inner peripheral side of the seal. In the accumulator, a seal diameter of the seal is set to be larger than an effective diameter of the bellows at a position where the seal comes into contact with the bellows cap. | 11-13-2014 |
20140360608 | HYDRAULIC ACCUMULATOR - A hydraulic accumulator comprises a pressure shell, a bladder, and a rod. The pressure shell is filament wound around a leak proof barrier/mold. The bladder is tubular and carried by the rod. The rod extends though the pressure shell and seals to the ends of the shell. The shell has a first generally cylindrical section positioned at the first end and a second generally cylindrical section positioned at the second end. A third generally cylindrical mid section is positioned between the first end and the second end. A first generally frustoconical section connects the first end section to the mid section and a second generally frustoconical section connects the second end section to the mid section. The bladder is tubular and expandable. A first chamber having an annular cross section for gas is formed between the rod and the bladder. A second chamber having an annular cross section for liquid is is formed between the bladder and the shell. A first flow passage is formed through an end seal means communicating with the first chamber. A second flow passage is formed though an end seal means communicating with the second chamber. | 12-11-2014 |
20150068631 | In-Line Water Hammer Arrester - An in-line water hammer arrester comprises a housing connectable at each end to a piping system, a fluid channel disposed within the housing to permit fluid to flow from the piping system through the housing and back into the piping system, a piston and a pressurized gas chamber. When a pressure spike occurs, the piston is pushed against the pressurized gas chamber allowing an expanded area for water flow until the pressure spike is dissipated and the piston returns to its resting position. When used with flexible hoses and tubing typically found with household appliance water supply lines, the in-line arrester is easily installed by a crimping or clamping type connector and takes up little space. | 03-12-2015 |
20150096640 | In-Line Water Hammer Arrester - An in-line water hammer arrester comprises a housing connectable at each end to a piping system, a fluid channel disposed within the housing to permit fluid to flow from the piping system through the housing and back into the piping system, a piston and a pressurized chamber. When a pressure spike occurs, the piston is pushed against the pressurized chamber allowing an expanded area for water flow until the pressure spike is dissipated and the piston returns to its resting position. When used with flexible hoses and tubing typically found with household appliance water supply lines, the in-line arrester is easily installed by a crimping or clamping type connector and takes up little space. | 04-09-2015 |
20150144216 | PISTON ACCUMULATOR - A piston accumulator in which good sealing and guidance of a piston is ensured, even if the diameter of the housing undergoes expansion, the strength, weight and costs of the piston accumulator being optimised as far as possible, a piston accumulator, which has a housing defining a pressure chamber and receiving a movable piston, a compressible fluid being held in the pressure chamber, the piston having a housing side facing the pressure chamber and the piston having a working side which can face a working fluid that can move the piston with a bushing provided, within which the piston can move. | 05-28-2015 |
20150323115 | WATER HAMMER ARRESTER - A water hammer arrester having a cap assembly, a piston assembly, a pair of o-rings, and a base assembly, wherein the cap assembly, piston assembly and base assembly are made from plastic. | 11-12-2015 |
20160138357 | DEVICE FOR ADJUSTING A MEDIA PRESSURE RELATIVE TO AN AMBIENT PRESSURE | 05-19-2016 |
20160153600 | In-Line Water Hammer Arrester | 06-02-2016 |
20160153601 | In-Line Water Hammer Arrester | 06-02-2016 |