| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 417490000 | Pumping member position controlled port | 26 |
| 20080317617 | Fluid pump - A pump for fluid, comprising a pump body defining a bore, a pumping plunger having an end region which is slidably received within the bore, a spill port defined by the pump body in a wall of the bore which port is coverable by the end region of the pumping plunger as the plunger is driven on a pumping stroke, in use, so as to initiate fluid pressurization within a pumping chamber; and a spill feature defined by the pumping plunger being arranged to uncover the spill port during a pumping stroke so as to cause depressurization of the pumping chamber. The pumping plunger further defines a speed sensitive feature configured to permit a controlled leak of fluid from the pumping chamber to the spill port towards the end of a pumping stoke. The invention also encompasses a pumping plunger particularly suited for use in the above described pump. | 12-25-2008 |
| 20100303655 | RECIPROCATING PUMP - A reciprocating pump including a sleeve comprising a first flow path element and a plunger receivable in the sleeve is provided. The plunger includes a fluid contact face and second flow path element in fluid communication with the fluid contact face. The sleeve and the fluid contact face define a compression chamber comprising an inlet and an outlet. The sleeve and the plunger are moveable relative to one another for adjusting overlap between the first flow path element and the second flow path element for diverting flow of fluid from the compression chamber and out of the second flow path element during a discharge stroke to control flow of fluid pumped out of the outlet. | 12-02-2010 |
| 20120141309 | PUMP WITH SIDE INLET VALVE FOR IMPROVED FUNCTIONING IN AN INVERTED CONTAINER - A pump for use in an inverted dispenser is disclosed herein. In one embodiment, the liquid pump includes a fluid chamber that has a top portion when in the inverted position and at least one side wall located below the top portion. A liquid intake port extends through the at least one side wall and allows fluid to flow into the fluid chamber. The pump also includes a check valve to prevent fluid from flowing out of the fluid chamber through the fluid intake port that is located in the at least one side wall. Actuation of the liquid pump in a first direction causes fluid to enter the fluid chamber through the fluid intake port and actuation of the liquid pump in a second direction causes liquid to exit the fluid chamber trough the fluid chamber outlet and out of a dispensing outlet. In one embodiment, the check valve is an elastomeric valve. The elastomeric valve may include a top portion to seal of an inlet opening in the top of an existing pump to convert the pump into a pump having an inlet opening below the top of the pump. In another embodiment, the fluid piston in the liquid pump is the check valve that seals off the intake opening from the fluid chamber when the fluid piston is moved past the inlet opening. | 06-07-2012 |
| 20120301339 | Leak-Preventing Device for a Pump - Disclosed is a pump with a shell, an air-pumping device, a cover and a leak-preventing device. The air-pumping device is used to pump air out of the shell and therefore pump liquid into the shell. The cover includes an opening and channel defined therein. The shell is in communication with the exterior via the opening and in communication with the cylinder via the channel as the cover is attached to the shell and the cylinder. The leak-preventing device is connected to the cover. The channel is normally released from the leak-preventing device as the pump is located in an upright position. The channel is blocked by the leak-preventing device as the pump is located in an inverted position. | 11-29-2012 |
| 20120308419 | Mechanism to Raise the Efficiency of a Reciprocating Refrigeration Compressor - An improvement to raise the efficiency of a reciprocating refrigeration compressor, the improvement comprising a channel in the piston that transfers pressure from the clearance volume of the cylinder to the low pressure side of the piston when an opening of the channel aligns with a groove or a duct in the cylinder wall. The channel comprises a ball extending from and held to the clearance volume opening of the channel by a spring. When the spring is compressed, the ball is moved from the opening, and pressure in the clearance volume is transferred to the low pressure side of the piston. | 12-06-2012 |
| 20130022484 | HIGH-PRESSURE PUMP - A high-pressure pump ( | 01-24-2013 |
| 20130189139 | VALVELESS RECIPROCATING COMPRESSOR - A system, in certain embodiments, includes a compression cylinder configured to mount to a reciprocating compressor. The compression cylinder includes an intake port and a discharge port. The system also includes a piston assembly disposed within the compression cylinder. The piston assembly includes a piston configured to selectively block the intake port upon movement of the piston assembly relative to the compression cylinder. | 07-25-2013 |
| 20150071802 | DEVICE FOR DOSING A FILL PRODUCT INTO A CONTAINER TO BE FILLED - A device for dosing a fill product into a container is described. The device includes a dosing unit with a dosing cylinder, a dosing piston displaceably disposed in the dosing cylinder between an upper center and a lower center of the dosing cylinder, and an intake valve with a valve seat for sucking the fill product from a rotatable product reservoir. The valve seat is disposed above a level formed by a base of the dosing piston at the lower center. | 03-12-2015 |
| 417491000 | Common pumping member controls inlet or discharge for plural chambers | 2 |
| 20090116986 | UNIVERSAL VIBRATORY PUMP - A vibratory pumping machine including a pumping chamber disposed within a housing for the machine having an inlet tube that is insertable into a container having a liquid therein to withdraw the liquid from the container upon actuation of the pumping mechanism also located within the housing. The chamber includes an oscillating rod that engages a resilient outlet member to form a vacuum within the chamber which draws the liquid upwardly through the tube into the chamber for dispensing through the outlet member. A mechanism including the pumping chamber can be utilized to withdraw liquids from within container of various shapes and sizes, as well as to introduce other fluids, such as gases, into containers containing such liquids. | 05-07-2009 |
| 20130336827 | FLUID PRESSURE CYLINDER - An open end of a cylinder main body is blocked by a cap, which includes a main body portion, and an outer edge portion that bends from the main body portion toward the open end of the cylinder main body, a distal end of the outer edge portion being locked with an inner circumferential wall. When a piston comes into abutment against the main body portion, a space is formed by the outer edge portion, the inner circumferential wall, and the end surface of the piston. A first port is disposed so as to communicate with the space, whereby the space serves as a space into which the pressure fluid is introduced. | 12-19-2013 |
| 417493000 | Including plural controlled inlet or outlet flow paths | 5 |
| 20090053086 | VOLUMETRIC PUMP WITH RECIPROCATED AND ROTATED PISTON - A volumetric pump ( | 02-26-2009 |
| 20090202374 | VALVE HEAD FOR HIGH PRESSURE HOMOGENISER - A high pressure homogenizer provided with head ( | 08-13-2009 |
| 20130094984 | VARIABLE DISPLACEMENT COMPRESSOR SHAFT OIL SEPARATOR - A compressor shaft has a fluid inlet that leads into a fluid inlet tube, which is perpendicular to a longitudinal hole in the length of the shaft. An intermediate inlet into the longitudinal hole is located between the fluid inlet and an outlet at an end of the longitudinal hole. A drive plate mounted to the compressor shaft has a protruding drive arm, which uses a holding mechanism to connect to a swash plate. At certain swash plate angles, the intermediate inlet is covered and sealed by the swash plate, or uncovered. The drive arm defines an internal bore and a through slot. At opposite ends, the bore merges into the longitudinal hole and opens into the through slot. The holding mechanism and/or swash plate guide covers the bore in the slot. | 04-18-2013 |
| 417494000 | Having means to selectively effect control at different positions of pumping member stroke | 2 |
| 20080206080 | Apparatus and Method for Compressing a Cryogenic Media - An apparatus and method for compressing a cryogenic media is disclosed. The apparatus includes a compressor compartment surrounded by a cylinder wall, a compressor piston being moved linearly in the compartment, an intake valve, and a compression valve, both valves being arranged in the area of the lower end position of the compressor piston. The compression valve is arranged laterally on the cylinder wall in the area of the lower end position of the compressor piston, and the head of the compressor piston has a conical shape. | 08-28-2008 |
| 20160160854 | ROTARY-WAVE SUB-ASSEMBLY FOR PUMPING A FLUID AND ROTARY-WAVE PUMPING DEVICE - A rotary reciprocating sub-assembly for pumping a fluid, the sub-assembly comprises: a hollow body provided with two ducts; and a piston that co-operates with the body to define a working chamber, the piston being movable angularly between two fluid-flow configurations and switching configurations, and being movable in reciprocating longitudinal translation so as to cause the dimensions of the working chamber to vary, the ducts are longitudinally offset from each other, the piston includes a channel that opens out longitudinally into the working chamber and radially into a pair of side recesses that are longitudinally offset, and that are arranged so that, in each fluid-flow configuration, only one of the recesses is in fluid-flow communication with only one of the ducts. | 06-09-2016 |
| 417496000 | Having serial control of inlet or discharge flow path | 1 |
| 20100303656 | METERING PUMP AND DRIVE DEVICE THEREOF - A drive device, comprising a housing, a rod, a limiting device, a sliding block, a rotating block, a pair of springs, a pair of first grooves, and a second groove. The rod passes through the sliding block, an axis is disposed on the sliding block, the rotating block is disposed on the axis, the springs are disposed on both sides of the rotating block, the top of the spring is contacted with one side of the rotating block, the first grooves are disposed on one side of the rod opposite to the housing, the second groove is disposed on inner side of the housing opposite to the first groove, a middle part of the second groove is lower than other parts thereof, one end of the rotating block slides in the second groove, and the other end of the rotating block slides in and between the first grooves. | 12-02-2010 |
| 417498000 | Longitudinally spaced inlet and discharge sidewall ports | 3 |
| 20080206081 | PISTON PUMP - A piston pump includes a pump mechanism for changing a volume of a pump chamber to move a piston in a housing, and a feed mechanism that has a feed ring attached to a circular groove portion of the piston to be slaved with a movement of the piston. The feed mechanism is located in a suction passage from a suction port to a pump chamber, and the piston has a flange portion protruding radially outwardly. An inner peripheral surface of the feed ring has an inner-diameter enlarged portion extending radially outwardly to have an enlarged passage portion between the inner peripheral surface of the feed ring and the outer peripheral surface of the piston, and a valve portion for opening and closing a suction passage is constructed of an end portion of the inner diameter enlarged portion of the feed ring and the flange portion. | 08-28-2008 |
| 20130034458 | PUMP DEVICE FOR LUBRICANT - To provide a pump device for lubricant which is downsized and reduced in cost due to a simplified decompression structure. | 02-07-2013 |
| 20140328708 | FUEL PUMP ASSEMBLY - The invention relates to a fuel pump assembly for a motor vehicle, which can be upstream of a fuel pump of the motor vehicle in a fuel line of the motor vehicle, having a pump housing and a pump device arranged thereupon, by means of which fuel can be pumped into and/or through the pump housing when the pump device is in the active state thereof, wherein the pump device has at least one stroke piston pump having an inlet valve and an outlet valve which are opened and closed in alternation by pressure activation when the pump device is active. In order to provide a fuel pump assembly which enables a very energy efficient operation of a motor vehicle thereby equipped, according to the invention the inlet valve and the outlet valve are held in the open positions thereof when the pump device is inactive. | 11-06-2014 |
| 417499000 | Having means to effect control at different positions of pumping member stroke | 1 |
| 20080240952 | High-Pressure Pump, in Particular for a Fuel Injection System of an Internal Combustion Engine - A high-pressure pump having a pump element a pump piston driven in a reciprocating motion and defining a pump work chamber into which fuel is aspirated from a fuel inlet during the intake stroke via an inlet valve, and from which fuel is positively displaced via an outlet valve during the pumping stroke. The inlet valve has a valve member which with a sealing face inclined relative to its longitudinal axis, cooperates with a valve seat disposed in a valve housing when the sealing face of valve member is lifted from the valve seat, a flow cross section between the valve member and the valve housing is opened between the fuel inlet and the pump work chamber. In the opened state, a region having the smallest flow cross section between the valve member and the valve housing is disposed downstream, of the sealing face of the valve member. | 10-02-2008 |
| 417500000 | Control by movement of pumping member about axis | 6 |
| 20080298989 | ROTARY AND TRANSLATING DISPLACEMENT DEVICE - A rotating-to-translating conversion device having a piston member oscillating within a casing where a rotating shaft is positioned through the piston. The interaction between a groove member between the piston and the shaft is such that an engagement member positioned within the groove will provide an oscillating motion of the piston with respect to the shaft, and a sealing system provides a seal between first and second regions within the casing. | 12-04-2008 |
| 20080304988 | Pump apparatus, assembling method of the same and washer system for vehicle - In a pump apparatus of a washer system, a closure member closes an opening of a motor housing and an opening of a circuit box. The closure member includes a plurality of terminal receiving holes. Each corresponding terminal is inserted through a corresponding one of the terminal receiving holes. One end of each terminal is placed at an interior part of the pump apparatus and is electrically connected to a corresponding one of a motor received in the motor housing and a control circuit received in the circuit box while the other end of each terminal is placed at the exterior part of the pump apparatus and forms a connection contact that is electrically connectable with a corresponding connection contact of an external connector. | 12-11-2008 |
| 20100260634 | Volumetric Pump With Reciprocated and Rotated Piston - A volumetric pump ( | 10-14-2010 |
| 20120003110 | PUMP FOR DOSING FLUIDS - A pumping assembly is provided which is suitable for use in a variety of dosing pumps. The pumping assembly comprises a pump body with a pump bore, and a sleeve fixed within the pump bore. The sleeve has a first end, a second end and a sleeve bore. A plunger is adapted to enter the first end of the sleeve and to reciprocate within the sleeve bore. The sleeve has at least one port to allow fluid flow through a wall of the sleeve. The, or each, port is elongated in a direction substantially orthogonal to a direction of reciprocation. | 01-05-2012 |
| 20140037482 | PORTABLE WORKING MACHINE - A working machine has an oil groove communicating a pump chamber with a gear chamber, and a small amount of oil is delivered to the gear chamber when oil is discharged from the pump chamber. Thus, the oil adheres to the outer peripheral surface of a rotating pump shaft and is kept remaining between a pump case and the pump shaft. Therefore, the viscosity is increased and a pressure loss between the pump chamber and the gear chamber is increased. Accordingly, the airtightness can be maintained, and the stable and inexpensive oil pump mechanism requiring less man-hour can be realized without depending on the accuracy of a gap between the pump case and the pump shaft. Since oil is kept remaining on the outer peripheral surface of the pump shaft, it is possible to prevent the pump case from being worn out and to improve the durability of components. | 02-06-2014 |
| 20160195074 | ROTARY SWINGING SUBASSEMBLY AND DEVICE FOR COINTEGRATED FLUIDIC MULTIPLEXING AND VOLUMETRIC PUMPING OF A FLUID | 07-07-2016 |
