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| Number | Title | Issue Date |
| 8132497 | Hydraulic machine, in particular hydraulic motor, and metering device comprising such a motor A hydraulic machine includes a casing with a body and a cover; a separation member which can make a reciprocating movement and defines two chambers; hydraulic switching elements including a distribution member; a compartment in the body of the casing connected to a ... | 03/13/2012 |
| 7975597 | Hydraulic machine, in particular hydraulic motor, with a reciprocating movement Hydraulic machine includes: a casing; a piston slidable therein and separating two chambers; hydraulic switching elements for supplying liquid to and for evacuating the chambers, including at least one connecting rod acting on a distribution member which can adopt t... | 07/12/2011 |
| 7207260 | Reciprocating hydraulic machine, especially a motor, and dosing apparatus comprising such a motor A hydraulic motor comprises a body and a piston able to slide in a reciprocating movement in a cylindrical housing of the body. A chamber (C1, C2) is formed on each side of the piston and hydraulic switching means are provided for feeding and evacuatin... | 04/24/2007 |
| 7174340 | Interval-based adjustment data includes computing an adjustment value from the data for a pending adjustment in response to retrieval of an adjusted data value from a database Interval-based adjustments to data are applied by a relational database engine. The engine stores raw, unadjusted data values in a separate table from adjustment values. The adjustment values are dynamically updated in response to a new adjustment interval. The adju... | 02/06/2007 |
| 6910405 | On/off switch for liquid additive injection pump Operation of a system for injecting a predetermined amount of a secondary fluid into a primary fluid stream. The system uses a liquid additive injection pump driven by a fluid powered motor that is driven by the primary fluid stream and can be selectively suspended ... | 06/28/2005 |
| 6453793 | Sprag motor A motor comprising a shaft with four racks which translate linear actuation of the racks to rotational motion of the shaft through pinions secured to sprag clutch assemblies. Motion of the rack assemblies is preferably offset to maintain a substantially c... | 09/24/2002 |
| 6263777 | Control system for reciprocating device A control system for a reciprocating device. The control system includes a switching valve having a fluid supply inlet, an exhaust outlet, a restrictor on the exhaust outlet, a drive line, a valve operable to connect one of the exhaust outlet and the flui... | 07/24/2001 |
| 5951265 | Fluid driven reciprocating engine or pump having overcenter, snap-action mechanical valve control A fluid driven reciprocating engine includes a main body having an inlet for receiving a primary fluid and an outlet for discharging the fluid. A drive piston is sealingly mounted in the main body for reciprocating movement in response to flow of the prim... | 09/14/1999 |
| 5758563 | Fluid driven reciprocating pump A fluid-driven reciprocating pump includes a housing and a reciprocating assembly defining first and second working fluid chambers. The housing includes an inlet and an outlet for introduction and exhaustion of the working fluid. A valve member slidably m... | 06/02/1998 |
| 5588813 | Fluid motor driven pump arrangement having motive fluid exhaust into the pump chamber The dosing arrangement comprises two first pumps for a liquid medium B whose pistons are mutually connected by a piston rod, and two other pumps and for a liquid medium A which are positioned outside in continuation of and coupled to the pumps for liquid ... | 12/31/1996 |
| 5505593 | Reciprocable device with switching mechanism A reciprocable device comprising a reciprocable member mounted for reciprocating movement within a chamber and a valve system for controlling the supply of fluid under pressure to the reciprocable member to bring about reciprocation of the member. The val... | 04/09/1996 |
| 5490441 | Automatic reciprocation of a reversible fluid pressure unit and switching valve therefor A fluid pressure piston-cylinder drive unit is reciprocated automatically by coupling the opposite ends of the cylinder through delivery conduits to a source of fluid pressure and exhaust through a switching valve in which a longitudinally reciprocative s... | 02/13/1996 |
| 5399071 | Pressure booster A liquid pressure booster includes a head member with a low-pressure inlet connectable to a liquid source at mains pressure, a high-pressure outlet connectable to the object to be tested, and a central bore, a compound cylinder constituted by a first, upp... | 03/21/1995 |
| 5388725 | Fluid-driven apparatus for dispensing plural fluids in a precise proportion A fluid-driven proportioning pump for dispensing precise volumes of at least three different fluids includes a drive cylinder housing a correspondingly formed drive piston which divides the drive cylinder into first and second drive fluid chambers and is ... | 02/14/1995 |
| 5363739 | Reduced icing low friction air valve An external air valve for a reciprocating air motor is provided with a the ability to transfer heat from incoming compressed air into the valve cups to prevent icing and a low friction mechanism for the valve slide to enhance reliability. The design has a... | 11/15/1994 |
| 5240390 | Air valve actuator for reciprocable machine An air control valve for directing air flow in a double-acting reciprocable motor, where the valve has a first link which is pivotally connected at one end to the motor and mechanically coupled along its length to a reciprocable motor member; a second lin... | 08/31/1993 |
| 5137436 | Device for the generation of auxiliary pressure This invention relates to a device for the generation of auxiliary pressure, and has control valves (2) arranged in a control housing (1) of a control unit. The control valves (2), depending on their position, actuate several control channels (4) leading ... | 08/11/1992 |
| 5092746 | Air-operated lubricant pump A lubricant pump that includes a pneumatic piston motor operated by compressed air, and is equipped with a control device that utilizes a slide valve mounted for reciprocal axial movement on the piston rod. A radially acting spring locking mechanism inclu... | 03/03/1992 |
| 5083906 | Fluid pump This invention relates to an improved gas-driven pump for pumping products, such as beverage syrups. A piston is mounted to a piston shaft for reciprocal movement within a housing. Cavities corresponding to the piston are alternately vented and pressurize... | 01/28/1992 |
| 5058768 | Methods and apparatus for dispensing plural fluids in a precise proportion A fluid-driven proportioning pump for dispensing precise volumes of at least three different fluids includes a drive cylinder housing a correspondingly formed drive piston which divides the drive cylinder into first and second drive fluid chambers and is ... | 10/22/1991 |
| 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 down. Additive pistons for pumping an additive liquid into ... | 10/08/1991 |
| 5024142 | Cyclically operating fluid drive motor with magnetically controlled diaphragm valves Presented is a fluid drive motor that may be attached to a conventional garden hose, for instance, to effect reciprocating motion of a drive shaft that may be connected to a utilitarian device, such as a scrub brush. The fluid drive motor is provided with... | 06/18/1991 |
| 5012643 | Pressure-driven engine A pressure-driven engine is provided therein with an intake valve and an exhaust valve the opening and closing operations of which are controlled by a combination of the urging force of the respective springs and the attractive force of the respective mag... | 05/07/1991 |
| 5002469 | 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 activating by their snap action valve operators or switching... | 03/26/1991 |
| 4923168 | Spool type switching valve device A spool type switching valve to be used for the switching operation of a diaphragm pump or a similar device, which simultaneously insures both preventing abrasion of the detent mechanism and obtaining thorough operation of switching the spool. A spool is ... | 05/08/1990 |
| 4899638 | Automatically-reversing piston-and-cylinder unit An automatically-reversing, fluid-actuated piston-and-cylinder unit includes a cylinder with a first section reciprocably receiving a piston and a second section reciprocably receiving a spool valve member. The piston is connected to a piston rod that ext... | 02/13/1990 |
| 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 stroke in the cylinder to ensure reliable stall-free opera... | 11/14/1989 |
| 4827832 | Valve system for a reciprocating device A reciprocable device comprising a reciprocable member mounted for reciprocating movement within a chamber and a valve system for controlling the supply of fluid under pressure to the reciprocable member to bring about reciprocation of such member. A moto... | 05/09/1989 |
| 4807515 | Method and apparatus for deicing a leading edge An airfoil deicer and method for deicing an airfoil wherein the deicer has an outer skin having an elevated modulus of elasticity and a means for introducing a small deflection into the outer skin thereby creating substantial chord-wise tension in the out... | 02/28/1989 |
| 4792291 | Viscous damped valve for hydraulic pump The hydraulically powered fluid pump has a spool valve which controls the direction of travel of the pump. The spool valve is designed to switch between positions relatively slowly so that in between pump cycles, the ball checks associated with the pump m... | 12/20/1988 |
| 4733599 | Apparatus for controlling the flow of a pressure fluid in a motor An apparatus for controlling the flow of a pressure fluid in a motor includes an arm which cooperates with a locking device to regulate the flow of the pressure fluid through a shut-off member or valve. The arm is connected to a lever which is pivotable a... | 03/29/1988 |
| 4705458 | Fluid operated pump A fluid operated pump comprising a housing including first and second cylinders. First and second pistons are rigidly fixed to each other and situated in their respective cylinders, the cylinders alternately receiving pressurized fluid for operating the p... | 11/10/1987 |
| 4684332 | Ratio pump and method A ratio pump for delivering first and second liquid beverage components in a desired ratio comprising a motor and a pump driven by the motor. The first beverage component is pressurized and is used as the driving fluid for the motor. The second beverage c... | 08/04/1987 |
| 4666376 | Solar powered pump assembly An apparatus for converting low level thermal radiation into mechanical work. The apparatus incorporates a collector (11) to receive and concentrate low level thermal energy to generate a pressure by vaporizing a working fluid. An expansible chamber (70),... | 05/19/1987 |
| 4610192 | Reciprocable device A reciprocable device comprising a reciprocable member mounted for reciprocating movement within a chamber and a valve system for controlling the supply of fluid under pressure to the reciprocable member to bring about reciprocation of such member. The va... | 09/09/1986 |
| 4550642 | Fluid pressure operated piston engine assembly A fluid pressure operated piston engine assembly, such as a pump assembly, including a fluid pressure operated piston engine and a fluid valve for coupling fluid under pressure to alternative portions of the piston chamber of the piston engine. As disclos... | 11/05/1985 |
| 4540349 | Air driven pump This invention relates to an improved air driven pump for pumping products such as beverage syrups. Two opposed pistons are mounted on a common piston shaft for reciprocal movement within a housing. Cavities corresponding to the pistons are alternately ve... | 09/10/1985 |
| 4519293 | Oil well jack The invention relates to an oil well jack having a walking beam mounted on a frame for motion in a vertical plane; and a plurality of hydraulic actuators connected to move the walking beam. The amplitude of movement of the beam as well as the frequency of... | 05/28/1985 |
| 4416593 | Gas operated down hole pump Double acting, gas operated pumps for lifting formation fluids from a well are disclosed as comprising a housing connectible to the lower end of a production string suspended within a well, and a pump assembly which may be lowered into and raised from a l... | 11/22/1983 |
| 4325285 | Compressed air motor A compressed air motor comprises a cylinder with a piston slidable in said cylinder and connected to a compressed air inlet through a slide valve mechanism which alternately admits respective opposite sides of the cylinder with compressed air for driving ... | 04/20/1982 |
