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| Number | Title | Issue Date |
| 7171963 | Product pump for an oxygen concentrator A product pump for pumping separated product gas from an oxygen concentrator which produces oxygen-rich product gas by utilizing a vacuum swing adsorption (VSA) process. The oxygen concentrator comprises a cartridge containing an adsorbent material for separating th... | 02/06/2007 |
| 6884045 | Hydraulically powered diaphragm pump with pretensioned diaphragm A hydraulically driven diaphragm pump with a diaphragm clamped at its edge between a pump body and a pump cover separating a delivery chamber from a hydraulic chamber and pretensioned in the direction of its intake stroke by spring force. A hydraulic diaphragm drive... | 04/26/2005 |
| 6695279 | Pressure-responsive actuator In a pressure-responsive actuator, the inside of a case is divided into first and second air chambers by a diaphragm, and a coil spring is accommodated in the second air chamber for exerting a spring force for urging the diaphragm in a direction to decrea... | 02/24/2004 |
| 6591736 | Master cylinder A master cylinder includes a cylinder housing having a rearwardly opening inner bore, a piston having a forwardly opening bore positioned in the inner bore of the cylinder housing, a spring disposed in the inner bore of the piston, a stopper supporting a ... | 07/15/2003 |
| 6519940 | Master cylinder for a hydraulic vehicle braking system with improved return spring restraining A master cylinder includes a restraining device arranged between the first and second pistons for preventing the return spring from being compressed and expanded beyond a certain extent. The restraining device includes a first, substantially sleeve-shaped... | 02/18/2003 |
| 6454548 | Low power electromagnetic pump An electromagnetic pump including a housing having an interior fluid containing region, a check valve operatively flow in a direction from an inlet toward an outlet and blocking fluid flow in a direction from the outlet to the inlet, an electromagnet carr... | 09/24/2002 |
| 6338293 | Reduced oil volume piston assembly for a hydrostatic unit A reduced oil volume piston assembly for a hydrostatic unit includes a piston assembly having a piston body and a stem formed separately from the piston body. A cavity is formed in one end of the piston body. The stem includes an enlarged head and an elon... | 01/15/2002 |
| 6253657 | Steering apparatus A vehicle steering apparatus (10) for turning steerable wheels (14, 16) of a vehicle includes a member (44) movable linearly in opposite directions to turn the steerable wheels in opposite directions. A housing (40) has a chamber (42) into which the membe... | 07/03/2001 |
| 5560206 | Master cylinder with return spring An object of the present invention is to provide a master cylinder in which the buckling of spring is prevented and the packing is not damaged. To achieve this object, in a master cylinder in which a return spring is disposed between the end wall of a cyl... | 10/01/1996 |
| 5400886 | Clutch slave cylinder A hydraulic clutch slave cylinder (16) for a motor vehicle clutch comprising an annular body (21) having inner and outer cylindrical walls (22,23) defining a annular bore (40) therebetween, and a piston (31) having annular portion (32) sealingly slideable... | 03/28/1995 |
| 5189942 | 3-position actuator A 3-position actuator having a moving body comprising a piston and piston rod slidingly reciprocating in an axial direction within a casing, a part of the rod protruding from said casing, said moving body being moved to one end side when fluid flows into ... | 03/02/1993 |
| 5125326 | Three position actuator having a neutral normal position for shifting a two speed transfer case A three position actuator which is used to position the gear range control lever on a two speed transfer case. Three positions are required to achieve HIGH, LOW and NEUTRAL. Two individual air chambers may be selectively charged with compressed air to mov... | 06/30/1992 |
| 5088385 | Actuator apparatus with secondary seal motion An actuator having a plurality of concentric cylinders with the inner and outer cylinders being adapted to connect to apparatus which must move relative to one another. Flexible sealing rings are positioned between adjacent cylinders and when the pressure... | 02/18/1992 |
| 4932312 | Master cylinder piston valve A valve for an automotive brake master cylinder piston is disposed at the end of forward stroke of the brake master cylinder piston in a passage defined along the axis of the master cylinder piston and communicating mutually an oil reservoir and an oil ou... | 06/12/1990 |
| 4881725 | Accumulator piston having a coil spring secured thereto Herein disclosed is an accumulator for suppressing an abrupt rise in and suppressing the pressure of a fluid. In this accumulator, a coil spring for urging a piston fitted in a cylinder in the axial direction thereof is secured on the pistion by securing ... | 11/21/1989 |
| 4875665 | Accumulator In an accumulator including a piston which slides freely in a cylinder and a spring which presses the piston, a hole of the piston end where, at the bottom, a large diameter section is made, and small diameter section whose diameter is smaller than that o... | 10/24/1989 |
| 4862788 | Valve positioning device A valve positioning device capable of comparing the travel position of an output shaft of a diaphragm actuator or cylinder with the pressure level of a pneumatic input signal and further being capable of manipulating the pressure of a separate air signal ... | 09/05/1989 |
| 4258614 | Cylinder device A cylinder device has a main body having therein a cylinder having an inner closed end and an outer open end, a piston slidably fitted in the cylinder and having a small diameter portion on the inner end thereof, a liquid pressure chamber defined between ... | 03/31/1981 |
