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 |
| 7255539 | Pump pressure limiting engine speed control A sprinkler system for building includes an internal combustion engine which operates a water pump. The water pump in turn forces water through pipes to sprinkler heads. The engine is at least in part controlled by a throttle control mechanism which includes a sprin... | 08/14/2007 |
| 7204085 | Power source derating component protection system A protection system is provided for a work machine with a power source. At least one sensor is configured to monitor a fluid parameter of a work machine system external to the power source. The sensor is further configured to produce a signal indicative of a value o... | 04/17/2007 |
| 7107798 | Drive mechanism for an automatic washer A drive mechanism for a vertical axis automatic washer. The washer has a rotatable wash basket, a rotatable agitator concentrically mounted in the wash basket and a drive motor. The drive mechanism includes a first drive shaft driven by the motor at a first rotation... | 09/19/2006 |
| 6966448 | Trailer-mounted crane apparatus A trailer-mounted crane apparatus includes a trailer supported from a ground surface on at least two wheels. A hydraulically operated crane arm is mounted to the trailer and is extendable outwardly. A crane hydraulic power unit is mounted to the trailer and supplies... | 11/22/2005 |
| 6915631 | Forward/backward switching control apparatus for hydraulic drive vehicle, and control method therefor A forward/backward switching control apparatus for a hydraulic drive vehicle that includes the following structures. A variable displacement type hydraulic pump driven by an engine for discharging pressure oil in both directions. An electromagnetic pump inclination ... | 07/12/2005 |
| 6397592 | Hydraulic system for a motor vehicle having a hinged convertible top A hydraulic system for a motor vehicle having a convertible top (2) which can be folded back has a convertible-top control system (1) and further hydraulic control devices (3, 4) which can be activated by a common hydraulic pump (6). In hydraulic lines (8... | 06/04/2002 |
| 6205780 | Low-loss drive system for a plurality of hydraulic actuators The invention related to a drive system with at least two hydraulic actuators, which are supplied with a hydraulic fluid by means of at least one pump. The drive system comprises at least one further second pump (15') arranged parallel to the first pump (... | 03/27/2001 |
| 6076350 | Hydrostatic drive system for a vehicle A hydrostatic drive system is provided for a vehicle, in particular an industrial truck, with a hydrostatic traction drive system (16), a hydraulic work system (13) and a hydraulic steering system (9). The invention provides a drive system that is compact... | 06/20/2000 |
| 5784885 | Pressurized fluid supply system A direction control valve is formed by providing a main spool for establishing and blocking communication between an inlet port, first and second actuator ports and first and second tank ports. A pressure compensation valve comprising a check valve portio... | 07/28/1998 |
| 5317871 | Circuit capable of varying pump discharge volume in closed center-load sensing system A closed center-load sensing system, capable of varying a pump discharge volume easily and with a high degree of accuracy, includes a power source having an indicator for indicating a rotational speed, a variable volume hydraulic pump driven by the power ... | 06/07/1994 |
| 5050379 | Displacement of a variable displacemet hydraulic pump and speed of an engine driving the pump controlled based on demand A controller for a hydraulic fluid flow control apparatus determines a quantity necessary for loading/unloading operations according to a signal from a lever operating degree detector, and controls a variable displacement type hydraulic pump to obtain the... | 09/24/1991 |
| 4967557 | Control system for load-sensing hydraulic drive circuit Control system for a load-sensing hydraulic drive circuit comprising; at least one hydraulic pump; hydraulic actuators driven by the hydraulic pump; and a pressure compensated flow control valve between the pump and each of the actuators, for controlling ... | 11/06/1990 |
| 4862691 | Pump drive speed regulator with control-pressure-generating valve having spring biased by cam face on load directional control valve Speed regulation of pump drive is set by a pressure-regulating valve providing a constant control pressure for a plurality of normal loads. If a high fluid consumption load such as the lifting cylinder of a forklift truck is to be simultaneously actuated ... | 09/05/1989 |
| 4856278 | Control arrangement for at least two hydraulic consumers fed by at least one pump According to the parent patent on inadequate power of the delivery pump the flow rate set at the directional control valves for the consumers is reduced in equal proportions in that electrical signals proportional to the flow rates are supplied to a summa... | 08/15/1989 |
| 4823551 | Hydraulic control circuit for an injection molding with two loads driven by a pump A hydraulic control system for simultaneously driving two hydraulic loads of a production machine by means of a variable delivery pump feeding drive fluid to the two loads through separate load lines, in accordance with independently controllable programs... | 04/25/1989 |
| 4776164 | Hydraulic-electric control circuit for earth-moving machine main engine An earth-moving machine has an automatic device for minimizing the running speed of the main engine when no power is required by the hydraulic actuators. This device establishes a predetermined hydraulic fluid flow-rate in the servocontrol in the non-neut... | 10/11/1988 |
| 4733533 | Controls for power drive assemblies A control for a power drive assembly having a primary energy source, a hydrostatic pump driven by the energy source and a consumer of energy has a multiway valve between the pump and consumer and a control pressure dependent valve receiving fluid from the... | 03/29/1988 |
| 4716727 | Hydraulic device The hydraulic device is provided, by way of example, with a pump (10) being driven by a Diesel motor (13) feeding pressure medium through wayvalves (18 to 20) to consumers. The speed regulator (14) of the injection pump of the Diesel motor is influenced w... | 01/05/1988 |
| 4706456 | Method and apparatus for controlling hydraulic systems A control system is provided for a hydraulic actuating system having a multi-phase stepping motor with a driver therefor which supplies and controls DC current through each of the motor windings such that no current is induced into the control winding fro... | 11/17/1987 |
| 4688391 | Refrigeration unit and hydraulic power system A transport refrigeration system is connected to a hydraulic system including a pump, control valves, a reservoir and a hydraulic piston. When the refrigeration system is running, the hydraulic system is in a bypassing or idling mode and the diesel and co... | 08/25/1987 |
| 4573319 | Vehicle hydraulic system with single pump A hydraulic system is disclosed for energizing the power steering and various work handling hydraulic load circuits of a lift truck. A single positive displacement pump supplies the requirements of the plural load circuits and is driven by a changeable sp... | 03/04/1986 |
| 4523431 | Load responsive system A load responsive fluid power and control system in which the speed of the prime mover, driving a fixed displacement pump, is varied to maintain a constant pressure differential between pump discharge pressure and maximum system load pressure, above a cer... | 06/18/1985 |
| 4489623 | Axle shaft and pump drive mechanism An axle shaft and pump drive mechanism (12) for a vehicle (10) includes a continuously variable transmission unit (24), an axle shaft (20), a pump (22), and a coupling device (34,78) for connecting the transmission unit (24) to the axle shaft (20) or to t... | 12/25/1984 |
| 4485623 | Vehicle hydraulic system with pump speed control A lift truck is disclosed with a changeable speed electric motor for driving a single positive displacement pump to supply the power steering and various work handling hydraulic load circuits. Manually actuable selector means are operatively connected wit... | 12/04/1984 |
| 4449365 | Lift, tilt and steering control for a lift truck A lift truck hydraulic control system designed to conserve energy includes a pair of separately controlled pumps (21, 22). One pump (21) supplies pressure fluid to a valve (12) for a steering cylinder (11) by way of a high priority port (34) of a priority... | 05/22/1984 |
| 4334408 | Pneumatic and hydraulic power control of drill An apparatus and method of controlling the input power to a drill feed or other hydraulic system in which the hydraulic power source is obtained from a compressed air supply. Wherein, the flow of air is varied in response to a hydraulic signal controlled ... | 06/15/1982 |
| 4100739 | Pressure sensitive charging means for a steering system An improved pressure sensitive valving arrangement is provided for a power steering unit for a lift truck, and in particular for a battery powered lift truck. To the conventional implement valve is added an accumulator charging means which includes an add... | 07/18/1978 |
| 4024711 | Throttle control mechanism for an engine The throttle of an engine is controlled to maintain its speed substantially constant in spite of variations of load upon it. The illustrated load comprises hydraulically operated equipment in a hydraulic system powered by a pump driven by the engine. Thro... | 05/24/1977 |
| 4017216 | Variable underspeed system linkage A hydraulic power system having a plurality of variable displacement pumps for supplying pressurized fluid for manipulation of one or more implements includes control means operative to automatically adjust pump displacement to the output horsepower of a ... | 04/12/1977 |
| 4017215 | Infinitely variable orifice for part throttle control A hydraulic power system having a plurality of variable displacement pumps for supplying pressurized fluid for manipulation of one or more implements includes control means operative to automatically adjust pump displacement to the output horsepower of a ... | 04/12/1977 |
| 4008571 | Hydraulic system for electric lift trucks An energy conserving hydraulic system for a lift truck or the like including a hydraulic tilt cylinder and a hydraulic lift cylinder subject to varying load requirements, manually operable valves for controlling the cylinders, a first, high volume hydraul... | 02/22/1977 |
| 3999386 | Overspeed protection control for an engine An overspeed protection control for an engine which drives at least one pump and having valve means selectively operable to cause an increase in pressure in a circuit supplied by said pump and a resulting increase in load torque on the engine. Means respo... | 12/28/1976 |
| 3991846 | Power steering system A power steering system for electric vehicles in which an electric drive motor for the supply pump of a power steering system is controlled by a motor control which is in turn controlled by the steering demand of the operator. The motor and pump are opera... | 11/16/1976 |
| 3973472 | Throttle control mechanism for an engine The throttle of an engine is controlled to maintain its speed substantially constant in spite of variations of load upon it. The illustrated load comprises hydraulically operated equipment in a hydraulic system powered by a pump driven by the engine. Thro... | 08/10/1976 |
