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Match Document Document Title
9010234 Hydraulic cylinder with piston valve assembly  
A hydraulic cylinder includes a cylinder assembly having a cylinder, defining an inner hydraulic chamber and being for reciprocating receipt of a piston and piston rod therein; a piston rod...
8850952 Cylinder phaser valves  
A phaser valve for a piston and cylinder assembly helps to keep a pair of pistons in phase with each other. The phaser valve includes a poppet which is slidable between opposing seats of a valve...
8683910 Hydraulic cylinder with piston valve assembly  
A hydraulic cylinder includes a cylinder assembly having a cylinder, defining an inner hydraulic chamber and being for reciprocating receipt of a piston and piston rod therein; a piston rod...
6505538 Multicylinder self-starting uniflow engine  
An improved uniflow engine has a plurality of vertically extending cylinders distributed in-line along a horizontally extending common crankshaft connected to pistons reciprocating in the...
6398527 Reciprocating motor with uni-directional fluid flow  
A double-acting reciprocating motor with uni-directional fluid flow path comprises a piston disposed within a cylinder. A first chamber is defined by the cylinder space between the piston and a...
6012377 Shuttle valve of a reciprocating pneumatic motor for hydraulics  
A shuttle valve mounted between a pneumatic piston and a ring plate in a reciprocating pneumatic motor and moved to control the passage between a shuttle compression chamber and a radial air inlet...
5540136 Reciprocating piston motor operating on pressure medium  
The invention relates to a reciprocating piston motor. The motor comprises at least one cylinder which is closed on at least one end, a piston which is slidable in the cylinder and forms a...
5513963 Direct action fluid motor and injection pump  
A direct action fluid motor and injection pump is disclosed which injects small quantities of a second fluid into a primary fluid stream. A housing has an inlet and an outlet connected to a...
5505224 Device for controlling piston displacement and pump including same  
The device (D) for controlling the reciprocating displacements of a differential piston (1) includes at least one valve associated with each of the parts of different cross-sections of the piston...
5269382 Impact device  
An impact device for breaking up and separating hard material comprises an actuating system for providing a faster cycle rate as well as an increased impact force. More specifically, the device...
5261311 Reciprocating hydraulic motor with a differential piston  
The invention relates to a reciprocating hydraulic motor having a differential piston interposed between an inlet pipe for fluid at a pressure P1 and an exhaust pipe for fluid at a pressure P2...
5243897 Magnetically actuated fluid motor  
A magnetically actuated fluid motor has a shiftable member having valve members for alternately closing one and opening the other of large and smaller faces of a stepped piston reciprocating in a...
RE34301 Fluid operable engine  
A fluid operable engine has a cylinder in which a piston slides up and down. The cylinder has a cylinder wall and two end walls. The piston divides the cylinder into two chambers. The piston is...
5209152 Airfoil changeover device  
An air operated reciprocating piston pump having a differential area piston is provided with an annular shaped airfoil device having a chevron cross-section and which is located beneath the bottom...
5203251 Motor with spring elements formed on valve assembly  
The present invention relates to a valve assembly (10) which is mounted on a part (piston unit 40) of an air motor (10) arranged for reciprocating movement in a housing (cylinder 12). The valve...
5150643 Reciprocating actuator  
An actuator is driven in a first direction by equal working fluid pressures acting on different piston areas acting in opposite directions, and is driven in a second direction by applying equal...
5137435 Compression spring fluid motor  
A reciprocating primary fluid driven motor has a stepped piston in a housing having a center hanging actuator rod which extends into the piston to periodically cooperate with an axially shiftable...
5120202 Switching device for reciprocating pumps  
The objective of the present invention is to provide a reciprocation switching device for a pump which will solve problems of conventional devices such as that, because coil springs are used for...
5065824 Hydraulically powered repetitive impact hammer  
An impact hammer according to this invention has a frame to house its actuating mechanism and to support a working impact tool which is to receive a sharp impact blow from the impact hammer and...
5055008 Proportionating pump for liquid additive metering  
A proportioning pump for liquid additive metering having a housing with a diaphragm piston therein and inlet and outlet primary fluid lines to said housing for moving said diaphragm piston up and...
4947731 Multicyclinder self-starting uniflow engine  
A uniflow engine has a plurality of cylinders disposed symmetrically around a common crankshaft connected to pistons reciprocating in the cylinders. In response to the availability of a working...
4879943 Expansible chamber motor with snap-acting valve  
This invention relates to an air motor having a snap-acting overcentering spring mechanism for snapping the valving of the air motor between first and second positions as the piston completes each...
4846634 Water to emulsion transformer  
Disclosed is a device for converting pressure fluid input of one fluid to pressure fluid output of a second fluid without contaminating either fluid. The transformation is accomplished by a unique...
4798125 Pneumatic type of hydraulic structure  
This invention pertains to a pneumatic mode under which the structure of a hydraulic system is driven, particularly denoting the pneumatic mode under which a mini air compressor is being used as a...
4756329 Devices for the injection of an additive product metered into a main fluid  
The invention relates to a device for injecting a metered product into a main circulation of liquid, comprising a metering piston (28) coupled to a stepped piston (11) whose motion results from...
4669553 Percussion tool  
A percussion tool utilizing a reciprocatory piston movement for applying an impact force on to a working surface including a casing (1) having disposed axially therein a hammer member (12), an...
4587732 Cable cutting and crimping  
A novel hydraulic tool used to cut cables, rods, bars and the like or crimp various items such as cable connectors and which is operated manually and with ease by a single man. The improved cable...
4521963 Hydraulic cable and rod cutting and crimping device  
A novel hydraulic tool used to cut cables, rods, bars and the like or crimp various items such as cable connectors and which is operated manually and with ease by a single man. The improved cable...
4506742 Vibrationless percussion tool  
A vibrationless percussion tool is disclosed characterized by use of a piston mounted for reciprocal movement against a constant pressure force within a casing to cyclically impact an anvil...
4470338 Self oscillating vacuum actuator  
A vacuum actuator, suitable for use in an automatic belt tensioning system, oscillates automatically when connected to a source of constant vacuum.
4458579 Hydraulically driven reciprocating motor  
A hydraulically driven reciprocating motor (10) includes a hydraulic cylinder (12) and a piston (60) mounted for reciprocation within the cylinder. The piston has passageways (74) formed...
4373425 Hydraulic engine  
Hydraulic engine with piston moving inside a chamber, the working and reversing controls being inside the piston.Said engine comprises a piston (6) which is provided with an annular chamber (15)...
4356583 Liquid-operated reciprocating prime mover assembly and body washing apparatus incorporating same  
A liquid-operated reciprocating prime mover assembly includes upper and lower reservoirs formed of interlocking cylinders enabling relative expansion and contraction of the interior volumes...
4352644 Air-hydraulic pump  
An air-hydraulic pump wherein an air-motor drives the pump. The air-motor includes a reciprocal piston which is driven in one direction by fluid under pressure and is returned by a spring. A...
4286929 Dual pressure gas motor, and method of operation  
A cylindrical shell with a double acting piston, having a high pressure area and a low pressure area on each side thereof, is provided with a valve for alternately injecting high pressure gas to...
4204812 Vacuum system  
Disclosed is a vacuum pump device that is adapted to create a vacuum source from a source of high pressure air. The device comprises a piston actuated in one direction by compressed air and in the...
4141215 Windmill mechanism  
A windmill in which a propeller is directly fixed to the shaft of a rotary hydraulic pump mounted on a cylinder casing rotatably mounted about a vertical axis to the top of a tower. A piston in...
4127057 Reciprocating fluid stroke motors with automatic control  
A new control system is provided for a reciprocating fluid stroke motor of the type which is pressured at its rod end, reciprocation being achieved by intermittent exposure of its full blind-end...
4087206 Subsurface pumping unit incorporating heavy duty reversing valve and method of operating  
The invention relates to apparatus for and the method of reversing the operation of a power piston in a power cylinder automatically to pump oil, corrosive or wax bearing fluids. The flow of high...
4034648 Reciprocating cylinder assembly for self-propelled sprinkler systems  
A reciprocating cylinder assembly for self-propelled sprinkler systems and the like comprising a cylinder tube having hollow plugs at each end having slidably engaged therein, a piston rod, said...
3960058 Device at hydraulic motor  
This invention relates to a hydraulic motor device comprising a cylinder and a piston reciprocating therein said piston being moved in one direction by means of a spring and in the other direction...
3937241 Device for injecting an adjuvant into a liquid  
A device for injecting adjuvant into a liquid employing a stepped piston in a stepped cylinder with a valve in the piston triggered to open and close at opposite ends of the piston travel to cause...
3893203 Drive motor for cleaning glass surfaces  
A drive motor for a glass cleaning device includes a cylinder having a fluid inlet at one end, a fluid outlet at its other end, and a piston slidable in said cylinder between its ends against the...
3804557 SURFACE OPERATED SINGLE TUBE PUMP  
This specification discloses a surface operated single tube pump intended for the raising of oil from the bottom of deep wells, including a small diameter well casing. The pump, considered in its...
3605556 BOOSTER PUMP  
3522996 BOTTOM HOLE PUMP  
3517741 HYDRAULIC WELL PUMPING SYSTEM  
3361036 Steam engine with self-contained valvular mechanism  
3302577 Pump metering device  
3268122 Pump with dual, fluid pressure actuated pistons and movable pick-up tube  

Matches 1 - 50 out of 76 1 2 >