Bizarre Patents
A method of swing on a swing is disclosed, in which a user positioned on a standard swing suspended by two chains from a substantially horizontal tree branch induces side to side motion by pulling alternately on one chain and then the other.
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| Number | Title | Issue Date |
| 8181457 | Fuel efficient hydraulic power steering A hydraulic power steering system that maintains proportional pressure control between an input side of a gear and assist pressures internal to the steering gear by relying upon a control valve. A pressure differential is maintained between the input side of a gear ... | 05/22/2012 |
| 8166753 | Accumulator system and method of monitoring same An accumulator system includes an accumulator containing working fluid and gas, an isolation valve through which working fluid selectively flows to and from the accumulator, an actuator operably coupled to the isolation valve, and a passageway fluidly communicating ... | 05/01/2012 |
| 8151564 | Fuel efficient hydraulic power steering A hydraulic power steering system that maintains proportional pressure control between an input side of a gear and assist pressures internal to the steering gear by relying upon a control valve. A pressure differential is maintained between the input side of a gear ... | 04/10/2012 |
| 7784277 | Hydraulic drive system with temperature compensation for pressure limit A hydraulic drive system for storing and releasing hydraulic fluid includes a high pressure storage device, a low pressure storage device, and a pump-motor operating at a range of pump-motor speeds for converting between hydraulic energy and mechanical energy. The p... | 08/31/2010 |
| 7743610 | Fuel efficient hydraulic power steering A hydraulic power steering system that maintains proportional pressure control between an input side of a gear and assist pressures internal to the steering gear by relying upon a control valve. A pressure differential is maintained between the input side of a gear ... | 06/29/2010 |
| 7677037 | Hydraulic drive system with precharge logic A hydraulic drive system for storing and releasing hydraulic fluid includes a high pressure storage device, a low pressure storage device and a pump-motor operating at a range of pump-motor speeds for converting between hydraulic energy and mechanical energy. The pu... | 03/16/2010 |
| 7341318 | Circulating fluid regulated braking device for air and land vehicles A circulating fluid regulated braking device for a vehicle includes a piston pump mounted directly on the hub of each vehicle wheel. The pumps mounted on front wheels are connected by pipes to a primary two-way valve, which, in turn, is connected by pipes to a prima... | 03/11/2008 |
| 7296407 | Hydraulic service module A hydraulic service module is provided for a hydraulic fluid system, which includes a fluid reservoir for storing an appropriate amount of a hydraulic fluid. The hydraulic service module comprises an outer casing defining an enclosure therewithin including an air ch... | 11/20/2007 |
| 7281372 | Hydraulic controller and hydraulic drive unit provided with said hydraulic controller A hydraulic controller in which driving sound and the number of parts can be reduced, and a long service life can be realized, and a hydraulic drive unit provided with said hydraulic controller. The hydraulic controller for a hydraulic drive unit includes a housing ... | 10/16/2007 |
| 7194856 | Hydraulic system having IMV ride control configuration A hydraulic control system for a work machine is disclosed. The hydraulic control system has a source of pressurized fluid and at least one actuator having a first and a second chamber. The hydraulic control system also has a first independent metering valve dispose... | 03/27/2007 |
| 7171810 | Stirling engine with hydraulic output A heat engine has a region within which a working fluid travels and an hydraulic fluid provided in a reservoir and the output from the heat engine drives the movement of the hydraulic fluid. ... | 02/06/2007 |
| 7159506 | State detecting device for load element receiving load of working fluid and state detecting device for fluid pressure control circuit The load element state detecting portion 72 detects the completion of the filling of the hydraulic oil into the clutch 62 and the working limit of the accumulator 64 on the basis of the displacement of the spool valve element 42. That is,... | 01/09/2007 |
| 7111704 | Hydrostatic drive apparatus for a road vehicle A road vehicle utilizes hydraulic machines for primary and accessory vehicle drive functions. An internal combustion engine directly drives a first variable capacity hydraulic machine selectively operable as pump or motor, an electric machine electrically coupled to... | 09/26/2006 |
| 7100371 | Hydraulic arrangement and process for its use A hydraulic arrangement is provided with at least one pressure accumulator for a hydraulic fluid, a hydraulic cylinder with at least one chamber to which pressure can be applied, a connecting line, on the basis of which the at least one accumulator is connected with... | 09/05/2006 |
| 7061736 | Method to project electronics from load dump A method for averting damage that may be caused by a transient energy surge during a load dump event, the method including detecting the load dump event and in response causing the consumption of transient excess energy due to the load dump event. ... | 06/13/2006 |
| 7055317 | Hydraulic module The invention relates to a new type of hydraulic module for actuating at least one hydraulic control element with a hydraulic pump in a housing, with an electric motor fastened to a first housing side for driving the pump, with a tank located on a second housing sid... | 06/06/2006 |
| 7017342 | Air compressor and control method therefor An air compressor includes a tank unit storing a compressed air used by a pneumatic tool, a compressed air generator which generates the compressed air and supplies the compressed air to the tank unit, a motor driving the compressed air generator, a drive portion in... | 03/28/2006 |
| 7019411 | Energy recovery apparatus and method of operating energy recovering apparatus A system is provided to recover unutilized energy as electric power in hydraulic turbine power generation. The system includes a heat storage tank, a pump for pumping water from the heat storage tank and to air conditioning loads, a first water feed pipe connected b... | 03/28/2006 |
| 7018002 | Motor vehicle master cylinder with device for detecting actuation of a braking system The invention proposes a master cylinder 1 with a device for detecting actuation of a braking system. The detection device is fixed to a body 2 of the master cylinder 1 at a pressure chamber 5. The detection device comprises a magnetic ci... | 03/28/2006 |
| 7018178 | Variable displacement pump and control therefore for supplying lubricant to an engine A control system for a variable displacement pump. The control system is operably associated with an engine control unit for passively or actively controlling the output of the pump in response to signals from the engine control unit. ... | 03/28/2006 |
| 6735942 | Method, computer program, and control unit for operating a vacuum reservoir provided in an internal combustion engine Described are a method, a computer program, and a control unit for operating a vacuum reservoir provided in an internal combustion engine of a motor vehicle for a servo booster or power-assist unit of the internal combustion engine, which is coupled to an intake man... | 05/18/2004 |
| 6679281 | Switching device for a machine A switching device for a machine, especially a digger, has at least one supply connection and one useful connection in addition to at least one hydraulic accumulator. An on-off valve is arranged between the supply connection and the useful connection, and... | 01/20/2004 |
| 6496767 | Constant groundspeed autoshift method and apparatus for maximizing fuel economy A method of determining shift points in a step gear transmission system to maximize fuel economy is disclosed. In operation, the method uses fuel economy data from a first gear ratio to determine a first series of constant fuel consumption curves for the ... | 12/17/2002 |
| 6470677 | Free piston engine system with direct drive hydraulic output A free piston engine system, particularly suitable for use in a motorized vehicle, is provided with at least one hydraulic pump, each pump having a first fluid port and a second fluid port. A free piston internal combustion engine includes a combustion cy... | 10/29/2002 |
| 6164068 | Variable pressure hydraulic systems A variable pressure hydraulic system includes a hydraulic pressure source which is selectively connected to a hydraulic system or to drain, via a control valve and a pressure transducer; the control valve in a first position isolating the pressure source ... | 12/26/2000 |
| 6085520 | Slide driving device for presses A slide driving device employs a variable-displacement pump/motor for driving a rotating element of the slide driving device. The displacement volume of the variable-displacement pump/motor, whose output drives the slide, is varied in response to deviatio... | 07/11/2000 |
| 6070408 | Hydraulic apparatus with improved accumulator for reduced pressure pulsation and method of operating the same Hydraulic apparatus including hydraulic supply means and an accumulator with an accumulator piston and a means for sensing the accumulator piston position to indicate a load requirement to a control means to selectively actuate the hydraulic supply means ... | 06/06/2000 |
| 6000219 | Charging valve arrangement to charge a store A load valve apparatus having a control valve which can be connected to a pump and an accumulator and which in a first position connects the pump to the accumulator and in a second position isolates the pump from the accumulator, and the pump and the accu... | 12/14/1999 |
| 5921342 | Power assisted steering apparatus for automotive vehicle A power assisted steering apparatus for a vehicle having a driving source, such as an engine, has an actuator, a hydraulic pump, a working oil pressure passage, and a drive switch. The actuator, which is in the vehicle steering mechanism, receives a suppl... | 07/13/1999 |
| 5878569 | Energy conversion system The energy conversion system of the subject invention converts the energy from a source of pressurized fluid, such as a free-piston engine and a storage accumulator, to a work system at various pressure levels. This is accomplished by providing power modi... | 03/09/1999 |
| 5794734 | Method and apparatus for supplying driving energy to vehicle subassemblies A method of supplying driving energy to subassemblies of a vehicle having an engine, a braking system including a brake pedal, a hydraulic machine, a hydraulic accumulator and a clutch having an engaged state for connecting the engine to the hydraulic mac... | 08/18/1998 |
| 5727389 | Actuation systems An actuation system for a vehicle in which a pump (10b) draws fluid from a reservoir (10a) to supply one or more first consumers, such as steering valve (50). One of more second consumers, such as a clutch actuator (12), are actuated via a solenoid valve ... | 03/17/1998 |
| 5630316 | Hydraulic driving apparatus using a bladder-type accumulator with an improved safety In a hydraulic driving apparatus with a bladder-type accumulator connected to a fluid supply pipe extending from a hydraulic fluid source to at least one actuator, the apparatus comprises a hydraulic pressure sensor attached to the fluid supply pipe in th... | 05/20/1997 |
| 5498138 | Sampling pump having a fluid motor pressure regulator An improved sampling pump has utility for withdrawing fluid from a pressurized source and outputting fluid to a sampling container. The fluid pump assembly of the present invention includes an operator unit for reciprocating a plunger, and a side body por... | 03/12/1996 |
| 5477675 | Fluid power assist method and apparatus An apparatus for driving a piston with fluid power is disclosed. The apparatus includes a fluid filled cylinder having an inner and an outer wall and defining a longitudinal axis. A piston is slidably positioned in the cylinder to move along a path of tra... | 12/26/1995 |
| 5477674 | Underwater hydraulic system for reducing pump noise A hydraulic system which includes a pump for supplying hydraulic fluid to a load by a fluid supply line and receiving hydraulic fluid from the load by means of a fluid return line. The pump, as well as a drive motor therefore is enclosed within a pressure... | 12/26/1995 |
| 5419401 | Oil-pneumatic load control device A load control device applicable on agricultural machinery in general and in particular on machinery used for direct planting, so that the working components in contact with the ground will maintain the same load constantly at all times for any ground pro... | 05/30/1995 |
| 5392690 | Marine power steering system A marine hydraulic system for operation of a power steering assembly includes a pressure accumulator to provide pressurized hydraulic fluid and valving that permits the transfer of hydraulic fluid within the cylinder to provide efficient use of hydraulic ... | 02/28/1995 |
| 5317870 | Pressure source for pressure device A pressure source for a pressure device has a pump for pumping fluid from a tank, an accumulator connected to the pump and to a pressure device, a device for detecting the pressure in the accumulator, and a control system for controlling the operation of ... | 06/07/1994 |
| 5293952 | Hydraulic fluid supply system for an installation in a motor vehicle having power assisted steering with a pressure regulation value connected to the main and secondary circuits The steering of a motor vehicle is assisted by a power steering means including a hydraulic distributor which is supplied with pressurized fluid by a pump from a reservoir. The vehicle also has a clutch having hydraulic servo assistance supplied by a serv... | 03/15/1994 |
