Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 6755630 | Apparatus for compressing fluid An apparatus for compressing fluid comprises a cylinder bore longitudinally penetrating a cylinder block a suction port penetrating to the cylinder bore, and a pair of slot-shaped fluid discharge having one opening at an end portion of the cylinder bore; a piston; a... | 06/29/2004 |
| 6746217 | Reciprocating compressor A reciprocating compressor includes a closed container having a suction tube and a discharge tube, and a reference frame elastically supported and mounted in the closed container. A driving motor is mounted at one end of the reference frame for generating a linear r... | 06/08/2004 |
| 6702557 | Valve assembly prohibiting re-expansion of residual fluid A fluid compressing apparatus including a cylinder block having a cylinder bore with a diameter penetrating through the cylinder block in a lengthwise direction, a discharge chamber having a diameter larger than the diameter of the cylinder bore, and at l... | 03/09/2004 |
| 6695595 | Pump for pumping at two pressures A pump includes a cylinder, a piston assembly, a first nozzle, a valve, a controller, a ring and a second nozzle. The cylinder defines first and second chambers and first and second channels for communication between the chambers. The piston assembly is r... | 02/24/2004 |
| 6357233 | Air switch operator A pneumatic operator for an air switch is provided. The operator is used to deliver at pulse of relatively high pressure air to an air switch, such as an air switch which would be commonly used in a spa bath or spa pool installation to operate a pump. The... | 03/19/2002 |
| 6200107 | Vacuum pumping systems A vacuum pumping system for use with a process chamber. The pumping system has a first vacuum pump whose inlet is adapted for communication via a first line with a chamber outlet and a second vacuum pump whose inlet is adapted for communication via a seco... | 03/13/2001 |
| 5556263 | Volumetric pump and value A volumetric pump and fluid control valve system for controlling the flow of fluid which comprises a housing containing an interior cavity, an elongated valve shaft is disposed inside the cavity, and an elongate drive shaft of smaller diameter than the va... | 09/17/1996 |
| 5407333 | Subsurface pump with pump rod connected valve ball A rod-driven, downhole pump is disclosed, the pump including a traveling barrel contained within a pump housing, a central pump rod extending axially within the barrel, a valve ball located at the lower end of the pump rod, a valve seat near the barrel lo... | 04/18/1995 |
| 5382142 | Wall pump having backwash valve actuator A backwash valve for use in a sucker-rod actuated fluid pump, may be selectively actuated to permit both the standing and traveling ball valves to be unseated at the same time permit the pump to be backwashed and/or the production tubing string drained.... | 01/17/1995 |
| 5326237 | High volume pump with valve tube A pump for moving a fluid includes an outer chamber having a first end wall portion containing a fluid entrance port and a second end wall portion containing a fluid exit port, a valve tube slidably contained within the chamber and having a first edge wit... | 07/05/1994 |
| 5147188 | Priming piston pump piston check valve A reciprocating priming piston pump is provided with a piston check valve which provides improved performance by minimizing the pressure drop there through. A dog-bone shaped seat is slideably located inside a piston which in turn slides inside the cylind... | 09/15/1992 |
| 5139398 | Neutralizer valve for a downhole pump A neutralizer valve that is for use in conjunction with one or more reciprocating pumps of a tubing string that is operated in an oil well for recovery of crude oil. The neutralizer valve takes the place of a regular traveling valve in a rod pump, which i... | 08/18/1992 |
| 5108272 | Sucker rod pump A subsurface well pump is provided which is resistant to vapor locking. The pump is a reciprocating sucker rod pump which has a top inlet valve, and a means to vent vapors from the barrel of the pump on each stroke.... | 04/28/1992 |
| 5067882 | Dual-acting, reciprocating piston pump A dual-acting, reciprocating piston pump is provided which comprises a pump body formed with a passageway having an inlet and a discharge outlet which receives a piston assembly including a plunger rod carrying a valve plate or spider, a shovel rod carryi... | 11/26/1991 |
| 4892468 | Hydraulic pump A hydraulic pump is disclosed, characterized in that, in the hydraulic pump including a cylinder body having a cylinder chamber, a suction port and an ejection port, a cam member and a reciprocatingly movable member are provided, wherein oil in said cylin... | 01/09/1990 |
| 4878819 | OTR safety urinal pumps A tie rod type cylinder valved at its lower plate and having a receiver on its upper plate. A rod-less trunk-like piston containing an inlet valve with a stem projecting out of the cylinder and connected with an actuator. The piston face having an opening... | 11/07/1989 |
| 4840548 | High pressure plunger pump A high pressure plunger pump comprises a centrally arranged pressure valve, an oscillatingly movable plunger, a sleeve guided on the plunger and limiting a working chamber, a suction pump which surrounds the sleeve and accommodates an aspirated fluid, the... | 06/20/1989 |
| 4790726 | Reciprocatory piston and cylinder machine A reciprocatory piston and cylinder machine particularly suitable for use as a vacuum pump includes a cylinder (17), a cylindrical piston (16) relatively slidably reciprocable within the cylinder (17), and means for substantially sealing the annular space... | 12/13/1988 |
| 4747760 | Hand-actuatable pump for feed pumps of fuel injection systems for internal combustion engines A pump for feed-pumps of fuel injection systems for internal combustion engines having a manually actuatable element, which operates counter to the force of a restoring spring to effect an inward stroke of a piston which includes a valve tappet thereon th... | 05/31/1988 |
| 4740141 | Plunger with composite retention valve A pump is disclosed comprising a piston plunger with a valve disposed in it. The ratio of the flow area on either side of the valve is optimized.... | 04/26/1988 |
| 4708597 | Plunger with simple retention valve A fluid pump is disclosed having a plunger reciprocating within a working cylinder and a standing intake retention valve. The plunger comprises a stem having affixed to it a plug and a stop, a body being slidably engaged to the cylinder an located on the ... | 11/24/1987 |
| 4662831 | Apparatus for fracturing earth formations while pumping formation fluids Oil and other fluids are pumped from a well drilled into chalk or other difficult-to-produce formations by applying a back pressure to the formation concurrently with pumping fluid from the formation. One embodiment a pump suitable for performing the meth... | 05/05/1987 |
| 4629402 | Valve assembly An improved submersible pump valve assembly, actuated by the reciprocating movement of a sucker rod extended from surface equipment to a downhole traveling valve located in a tubing string, the valve assembly comprising a rotatable fluid port assembly sup... | 12/16/1986 |
| 4599054 | Travelling valve assembly for a fluid pump A travelling valve assembly for use in a sucker rod actuated fluid pump includes a ball valve actuator which engages the ball valve during the downstroke of the sucker rod to force the ball valve into an open fluid transmitting relationship with respect t... | 07/08/1986 |
| 4591316 | Piston with simple retention valve A positive displacement pump particularly useful in pumping viscous fluids which may or may not contain gases, including water vapor, and/or suspended solids in which the actual flow equals the theoretical maximum flow through a check valve associated wit... | 05/27/1986 |
| 4591315 | Piston with composite retention valve A positive displacement pump particularly useful in pumping viscous fluids which may or may not contain gases, including water vapor, and/or suspended solids in which the actual flow equals the theoretical maximum flow through a check valve associated wit... | 05/27/1986 |
| 4470773 | Resilient chamber fluid sampler having vacuum breaker apparatus In a resilient chamber sampling apparatus incorporating a resilient body having a dished cavity area which is squeezed to pressure fluid trapped in the dished area, an improved form preferably incorporates an alternate anvil. It has a facing plate member ... | 09/11/1984 |
| 4060351 | Controlled inlet valves for metering pumps This invention relates to controlled inlet valves for metering pumps. The metering pumps for which the valve of the invention is applicable are of the kind comprising a cylinder in which moves a piston to which a reciprocating movement is imparted. In the... | 11/29/1977 |
| 4014629 | Pump for pumping both low viscosity and high viscosity fluids An improved pump for pumping both low viscosity and high viscosity fluids, which contains therein a body with three cavities, a hollow cylinder fitting in the first cavity and attached at its lower end, a hollow cylinder head containing therein a first va... | 03/29/1977 |
| 4009617 | On-line liquid samplers Sampling apparatus for periodically withdrawing small samples of liquid flowing through a pipe. The apparatus embodies an intake passage communicating with a T-section in the pipe. Liquid in the intake passage is pumped by a diaphragm which is pulsed pneu... | 03/01/1977 |
