Did You Know...
...that Robert Adler has the dubious distinction of being the Father of the Couch Potato? Back in 1955 Adler was employed by what was then Zenith Radio Corp., where he was charged to invent something that would allow viewers to turn down the TV volume without leaving their chairs. After a series of flops (such as a wired contraption that people tripped over), Adler hit on the idea of using sound waves. Thus the Remote Control was born...
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| Number | Title | Issue Date |
| 7464544 | Pressure device A reciprocating body 12 is reciprocably housed in a cylinder body 6, and a pressure rod 20 is reciprocably attached to this reciprocating body 12. A pressure end 20a of the pressure rod 20 protrudes from the cylinder ... | 12/16/2008 |
| 7243592 | Draining of oil leak in a hydraulic cylinder A device for a single-acting hydraulic cylinder (1) designed to lift or pull a load upon the existence of an oil pressure on the rod-side of a cylinder piston (7), where the cylinder bottom (15) of the hydraulic cylinder (1) is provided w... | 07/17/2007 |
| 7163078 | Hydrostatic drive The invention relates to a hydrostatic drive comprising at least one hydraulic pump (1) and a first and a second hydraulic motor (6, 25), which are respectively connected to said hydraulic pump (1) by means of two service lines (4, 41, 5, 5 | 01/16/2007 |
| 7003340 | Electrochemical analyte sensor An electrochemical analyte sensor formed using conductive traces on a substrate can be used for determining and/or monitoring a level of analyte in in vitro or in vivo analyte-containing fluids. For example, an implantable sensor may be used for the continuous or au... | 02/21/2006 |
| 6978746 | Method and apparatus to control a variable valve control device The present invention provides an improvement over conventional engine control systems for variable valve control devices for the valvetrain in that it provides a substantially closed-circuit hydrostatic fluid control system and accompanying method to improve respon... | 12/27/2005 |
| 6347515 | Hydraulic lift actuating device The invention relates to a drive device for a hydraulic elevator, the device comprising an actuator (1) whose pressure chamber (1a) is connected to a pump (11) via a down duct (15) and via an up duct (16). A pressure accumulator (4) is connected to the do... | 02/19/2002 |
| 6125938 | Control module system for subterranean well A control module system provides convenient and economical operation of downhole tools, which operation is controllable from a remote location. In a described embodiment, a control module system includes a control circuit configured to control selective o... | 10/03/2000 |
| 6116025 | Dynamic, automatic stroke reversal system for reciprocating, linearly driven pumping units This pneumatic stroke reversal system for reciprocating, linearly driven pumping units is completely automatic in its cyclic operation, and greatly improves efficiency. A smaller drive motor is required because kinetic energy is stored at the end of each ... | 09/12/2000 |
| 5832727 | Hydraulic oil well pump drive system A hydraulic oil well pump drive system for driving an oil well sucker rod includes a master piston positioned within a master cylinder for axial displacement between first and second ends of the master cylinder. The master piston has a piston drive rod wh... | 11/10/1998 |
| 5778669 | Hydraulic positioning system with internal counterbalance A fluid system is connected to a three chamber fluid cylinder. The effective pressure responsive areas of two of the pressure chambers are equal such that when fluid at a selected rate of flow and at a predetermined pressure is communicated to one of the ... | 07/14/1998 |
| 5536150 | Hydraulic-pneumatic stroke reversal system for pumping units, and its application in preferred embodiments This pumping unit stroke reversal invention can be employed in various embodiments, and uses one or more resilient hydraulic-pneumatic accumulators which slow and stop each stoke, storing the kinetic energy, and returning this energy to begin and accelera... | 07/16/1996 |
| 5447026 | Hydraulic oil well pump drive system A hydraulic oil well pump drive system for driving an oil well sucker rod includes a master piston positioned within a master cylinder for axial displacement between first and second ends of the master cylinder. The master piston has a piston drive rod wh... | 09/05/1995 |
| 5429036 | Remote hydraulic pressure intensifier A double acting reciprocating intensifier uses a single low pressure fluid stream as both the power supply and the source of fluid the pressure of which is to be intensified. The entire device, including flow paths, is confined within a compact cylindrica... | 07/04/1995 |
| 5281100 | Well pump control system A well pumping system includes a pivotally mounted walking beam and "horsehead" connected to a downhole pump by a pump rod in the conventional manner. A hydraulic lift piston and cylinder and a pneumatic balance piston and cylinder are connected to the wa... | 01/25/1994 |
| 5180289 | Air balance control for a pumping unit An air-balance control system for a pumping unit minimizes the difference in torque on pumping unit components on the upstroke and the downstroke. The control system measures pump motor current and rod string position to effectuate porting air to or venti... | 01/19/1993 |
| 4848085 | Oil-well pumping system or the like The invention involves pressure-counterweighted oil-well pumping apparatus in which derrick structure of elemental simplicity involves components which are readily assembled and disassembled, such that a given pumping apparatus can be loaded on a single t... | 07/18/1989 |
| 4761953 | Hydraulic elevator mechanism The invention contemplates hydraulic-lift mechanism which employs a power integrator in the connection between a charged hydraulic accumulator and the actuator for a vertically positionable load; the power integrator, additionally, has a prime-mover conne... | 08/09/1988 |
| 4761954 | Fork-lift system A battery-operated electric-motor driven hydraulic-lift mechanism for a fork-lift vehicle employs a hydraulic accumulator which serves an intertia-free counterweight function, designedly to the degree that such counterweight action is a direct offset of a... | 08/09/1988 |
| 4715180 | Hydraulic lift mechanism The invention contemplates hydraulic-lift mechanism which employs a power integrator in the connection between a charged hydraulic accumulator and the actuator for a vertically positionable load; the power integrator, additionally, has a prime-mover conne... | 12/29/1987 |
| 4707993 | Pumping apparatus A pumping apparatus is disclosed which uses a reversible, variable displacement hydraulic drive pump capable of pumping fluid under pressure. A hydraulic cylinder enclosing a piston is operatively connected to a port of the hydraulic drive pump. A fluid a... | 11/24/1987 |
| 4702076 | Hydraulically operated clam-shell device The invention contemplates a hydraulically operated twin-cable suspension for a clamshell or the like load-handling device. In a preferred embodiment, a charged accumulator is effectively a counterweight and is the source of all hydraulic fluid needed for... | 10/27/1987 |
| 4698968 | Pumping unit A pumping unit particularly for pumping oil from an oil bore has an inner stationary cylinder unit and an outer cylinder unit reciprocatable relative to the inner unit by hydraulic fluid; the units are enclosed in a casing and the outer unit functions as ... | 10/13/1987 |
| 4631918 | Oil-well pumping system or the like The invention contemplates oil-well pumping apparatus (a) in which a traction cylinder is mounted at the well-head for direct reciprocating operation of the polish rod from which a pumping piston is suspended in a well casing, and (b) in which hydraulic-c... | 12/30/1986 |
| 4571939 | Hydraulic well pump A hydraulic well pump for operating a pump sucker rod string including a hydraulic cylinder assembly for raising and lowering the sucker rod string and a fluid counterbalancing system for offsetting the combined weight of the reciprocating service equipme... | 02/25/1986 |
| 4546607 | Pumping apparatus A pumping apparatus includes a reversible variable displacement drive pump having two ports and a lifting apparatus connected to one of the ports. The lifting apparatus is designed to fit on the well-head of an oil well and attach to the polish rod of the... | 10/15/1985 |
| 4516473 | Cylinder driving system A cylinder driving system comprising balance cylinders communicated to an accumlator for supporting a load under balanced state, a drive cylinder of a small diameter connected by way of a switching control device to an air source for driving the load with... | 05/14/1985 |
| 4483662 | Method for pumping a liquid from a well and apparatus for use therein A pumping method, principally for oil, allows the sucker rod to fall under gravity for the first part of the downward stroke, then decelerates the sucker rod to a slow rate of descent, so creating a pause in the sucker rod's motion. Shock-absorbing means ... | 11/20/1984 |
| 4462759 | Oil well pump shutdown system An emergency shutdown system for an air-balanced pumping unit which includes a pump motor, a walking beam driven by the pump motor, a rod string reciprocated by the beam, and an air-balance cylinder and an air receiver which together define an air spring ... | 07/31/1984 |
| 4414808 | Hydraulic actuator for well pumps A hydraulic actuator and system for driving a subsurface reciprocating pump. The actuator is double acting and comprises a piston reciprocable in a cylinder on a guide tube, so that the maximum volume of the chamber below the piston is greater than that o... | 11/15/1983 |
| 4406122 | Hydraulic oil well pumping apparatus The preferred embodiment is directed to an oil well pumping apparatus incorporating a walking beam having a horsehead at one end which connects to the sucker rods in the oil well. The opposite end of the walking beam is supported on a fixed pivot. A hydra... | 09/27/1983 |
| 4406597 | Method for pumping a liquid from a well and apparatus for use therein A pumping method, principally for oil, allows the sucker rod to fall under gravity for the first part of the downward stroke, then decelerates the sucker rod to a slow rate of descent, so creating a pause in the sucker rod's motion. Shock-absorbing means ... | 09/27/1983 |
| 4400141 | Hydraulic pump unit A hydraulic pump unit for pumping oil from oil-bearing strata which includes a frame slidably mounted on a stationary push-off tray and a hydraulic pumping unit mounted on the frame, which pumping unit further includes a pair of hydraulic cylinders suppor... | 08/23/1983 |
| 4392792 | Lineal multi-cylinder hydraulic pumping unit for wells The present invention provides a hydraulic pumping unit, which is capable of pumping oil and other fluids from the downhole of a well. The pumping unit includes a frame and multi-cylinder system which is attached to the frame in such a manner that it is g... | 07/12/1983 |
| 4380150 | Pump jack assembly for wells One pair of actuating piston and cylinder assemblies are operatively connected to the polish or sucker rod of the pump and are extended or retracted by hydraulic fluid. A further pair of piston and cylinder assemblies are operatively connected to the poli... | 04/19/1983 |
| 4347049 | Balance hydraulic pumping unit A balanced hydraulic well pumping unit for actuating an underground pump in which the weight of the downstroke is utilized to store energy in an accumulator which is then used to assist in the upward stroke of the pump. A working rod passes through first ... | 08/31/1982 |
| 4198820 | Pumping unit for a well pump A pumping unit for a well pump has a surface main cylinder with a main piston reciprocable therein, the piston having a connection to a standard well pump. In a flow cylinder of a relatively large diameter, a flow piston reciprocates within and divides th... | 04/22/1980 |
| 4191016 | Pumping jack A pumping jack for use with a well having a vertically reciprocable polish rod has a base including a horizontally extending table. A hydraulic cylinder is mounted on the base, with the cylinder axis extending parallel to and above the table. A plunger is... | 03/04/1980 |
| 4167098 | Horizontal pumping unit A horizontally exposed pumping unit including a hollow base structure containing a volume of hydraulic fluid and compressed air, the base structure supporting a horizontally aligned reciprocating piston assembly deployed for horizontal translation along a... | 09/11/1979 |
| 4114375 | Pump jack device A pump jack, such as the type capable of use in pumping crude oil from an oil well, the pump jack including a double acting piston and cylinder motor with the piston rod of the motor being adapted to be connected to the polished rod projecting upwardly fr... | 09/19/1978 |
| 4099447 | Hydraulically operated oil well pump jack A hydraulically operated oil well pump jack utilizing a double acting hydraulically operated piston and cylinder assembly for pivoting the walking beam of an oil well pump jack, a linkage mechanism for operating a reversing valve to cause extension and re... | 07/11/1978 |
