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| Number | Title | Issue Date |
| 7073643 | Compensated rod for a frequency dependent damper shock absorber A frequency-dependent damper incorporates a compensated piston assembly to reduce the amount of static push-out force. The piston rod is a hollow rod with a compensator being disposed within the hollow portion of the piston rod. The piston rod is a hollow rod with a... | 07/11/2006 |
| 6711984 | Bi-fluid actuator The invention is a bi-fluid actuator for precise bi-directional movement and positioning of a mechanical object or load. The bi-fluid actuator includes a pneumatic fluid container defining opposed first and second pneumatic fluid chambers, and having a first mechani... | 03/30/2004 |
| 6590952 | Reactor manual control system In a boiling water reactor controlling each control rod hydraulically by driving a solenoid valve, the control system comprises an operation control means 41 having a duplicated data processing unit for generating sequence patterns based on the timing of ... | 07/08/2003 |
| 6408739 | Pneumatic cylinder with internal liquid dampening means A pneumatic cylinder having internal hydraulic dampening device for cushioning the motion of a pneumatic piston (44) at its end of stroke. The hydraulic device includes a pair of hydraulic pistons (50, 52) cooperating with a pair of hydraulic cylinders to... | 06/25/2002 |
| 6389341 | Control system for a vehicle suspension A suspension system (20) controls the amount of compressible fluid (42) within struts (28) to determine spring rate coefficients (Ks) and dampening coefficients (Bs) for the struts (28). The spring rate and dampening coefficients (K | 05/14/2002 |
| 5009068 | Pneumatic cylinder with positioning, braking, and feed rate control A pneumatic piston/cylinder unit comprises primary and secondary pistons operable in first and second cylinder zones respectively. Each of the primary and secondary pistons divide its respective cylinder zone into two chambers, one of the chambers of the ... | 04/23/1991 |
| 4907495 | Pneumatic cylinder with integral concentric hydraulic cylinder-type axially compact brake A composite hydraulic cylinder apparatus which has a pneumatic cylinder mechanism, a braking oil hydraulic cylinder mechanism associated concentrically with the pneumatic cylinder mechanism, an oil passage for communicating between the front chamber and t... | 03/13/1990 |
| 4877222 | Fluid suspension spring and dampener for vehicle suspension system A vibration isolating and damping suspension strut for vehicle undercarriages comprising an elongated cylinder and piston structure wherein the cylinder is divided into opposed chambers which are in communication with each other by flow restrictive passag... | 10/31/1989 |
| 4813341 | Pneumatic cylinder and means for powering a second pneumatic unit A pneumatic cylinder having an elongatged cylinder member, a reciprocally movable piston, an elongated slot formed in the cylinder member, a seal for sealing the slot during reciprocal movement of the piston and a transfer means for transferring reciproca... | 03/21/1989 |
| 4765225 | Digitally controlled air-over-hydraulic actuator and method A digitally controlled air-over-hydraulic actuator includes a pneumatic cylinder and a hydraulic cylinder each having a separate piston and a common connecting rod. The pneumatic piston applies force to the connecting rod urging movement of the hydraulic ... | 08/23/1988 |
| 4735402 | Fluid suspension spring and dampener for vehicle suspension system A vibration isolating and damping suspension strut for vehicle undercarriages comprising an elongated cylinder and piston structure wherein the cylinder is divided into opposed chambers which are in communication with each other by passages formed in the ... | 04/05/1988 |
| 4633758 | Double-acting working cylinder having a piston-dampening arrangement A fluid-pressure-operated, double-acting working cylinder which dampens the final braking of the work piston, includes a cylinder housing with a movable work piston disposed therein, the work piston dividing the cylinder into two work chambers. A piston r... | 01/06/1987 |
| 4569274 | Single spring fluid cylinder with motion buffer An improved double-acting fluid cylinder with primary and secondary chambers of tandem construction, wherein the primary chamber is utilized to provide ram motion in a first direction and wherein the tandemly arranged secondary chamber is provided with a ... | 02/11/1986 |
| 4558767 | Fluid amplified shock absorber with rebound stiffening construction A shock absorber having a casing and a piston with a piston head mounted thereon and located in a chamber within the casing containing fluid, an annular peripheral groove on the shock absorber head for mounting an annular turbulence inducing member having... | 12/17/1985 |
| 4527502 | Expelling mechanism for discharge tubes and drain tubes of submarines An expelling mechanism adapted for use with discharge tubes and drain tubes of submarines for ejecting a weapon by compressed air includes a chamber formed with an outlet opening, and adapted to substantially communicate selectively with a storage contain... | 07/09/1985 |
| 4497394 | Piston having valves for a damper The piston comprises, fixed on a rod (9), a central element constituted by a thin perforated disc (8), and two lateral elements (6, 7) in which are provided valve members (21, 22) which cooperate with seats defined by the disc (8). The piston (1) is guide... | 02/05/1985 |
| 4481868 | Fluid cylinder with motion buffered ram assembly An improved double-acting fluid cylinder with primary and secondary chambers of tandem construction, wherein the primary chamber is utilized to provide ram motion in a first direction and wherein the tandemly arranged secondary chamber is provided with a ... | 11/13/1984 |
| 4448412 | Exercising device with double acting hydraulic cylinder An exercising device comprising a frame, actuating means, and a double acting hydraulic cylinder used therewith. The hydraulic cylinder includes a container having first and second chambers and passageways for placing the chambers in fluid communication w... | 05/15/1984 |
| 4335498 | Machine tool A machine tool having a spindle assembly associated with an indexing tool storage rack on which a number of distinct tools are stored, and a transport or tool carriage for conveying a selected tool between the storage rack and the spindle assembly; and in... | 06/22/1982 |
| 4279181 | Tool control head for pipe and tubing cutting machine A machine for performing cutting, roll-grooving and like operations on pipe or tubing. A pneumatically operated head assembly provides for rapid tool advancement to a first predetermined position short of work engagement and hydraulically cushioned advanc... | 07/21/1981 |
| 4257314 | Apparatus for improved motion control An improved type of hydraulic control cartridge with mounting structure and accessorial safety device for installation within both ends of reciprocative pneumatic actuators to permit a safe increase in their speed of operation. The safety device automatic... | 03/24/1981 |
| 4255930 | Power device A closed circuit power system is disclosed herein having a hydraulic power device incorporated therein which includes an input piston and cylinder assemblage and an output piston and cylinder assemblage connected together by a fluid conduit so as to opera... | 03/17/1981 |
| 4173920 | Plunge shaving machine A gear shaving machine employing plunge cut (radial infeed with no lateral traverse) in which the rate of relative infeed between a meshed gear-like tool and a work gear is controlled by hydraulic escapement mechanism.... | 11/13/1979 |
| 4120478 | Gas-hydraulic pressure type actuator for pipeline valve An actuator 4 for a valve 2 disposed in a gas pipe line 1 is driven directly by the gas pressure in the pipe line, which is tapped off and supplied to the appropriate end of the actuator cylinder via an electromagnetic spool valve 12 or 25. A hydraulic tr... | 10/17/1978 |
| 4043787 | Cylinder and piston assemblies in glassware forming apparatus In glassware forming apparatus the reciprocation of a transfer carriage between two operating positions is effected by a cylinder and piston device in which the traverse of the piston is progressively cushioned at the ends of the piston stroke. Members, w... | 08/23/1977 |
| 3991659 | Fail safe apparatus for load lifts To prevent rapid collapse of a hydraulic lift mechanism in event of the failure of the hydraulic mechanism (e.g. as by rupture of a pressurized hydraulic line) a rate of flow responsive check valve is provided, either in a separate backup cylinder or at t... | 11/16/1976 |
| 3955478 | Hydraulically powered percussion drill The improved hydraulically actuated percussion drill described hereinafter is designed to reciprocate a striker piston contained therein regardless of whether or not the striker piston engages the drill steel whereby vibration can be imparted to the drill... | 05/11/1976 |
| 3940887 | Hydraulically controlled pneumatic swinging door operator A hydraulically controlled pneumatic swinging door operator comprising a pneumatic cylinder with a piston therein, a continuous loop connected to opposite sides of the piston and entrained at its ends over sprockets, one of which makes driving or driven c... | 03/02/1976 |
