Bizarre Patents
Mountable Printable Placard With Headband
A resilient headband in a shape for being mounted on the head of the user. The headband is equipped with a longitudinal slotted member for holding a placard.
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| Number | Title | Issue Date |
| 7788920 | Hydraulic pump with control system A hydraulic motor is driven by a fixed displacement, three stage gear-type pump. The three equal displacement sections provide 3 equally-stepped flows so that the hydraulic motor can have three speeds. Valving and controls are provided for remote on-the-fly shifting... | 09/07/2010 |
| 7739870 | Hydrostatic transmission A transmission for a vehicle includes a fixed displacement pump operable to produce a high pressure flow and a fixed displacement motor. A fluid flow path is disposed between the pump and the motor. The fluid flow path is integrated into a housing containing at leas... | 06/22/2010 |
| 7614227 | Rotary control valve for a hydrostatic transmission A rotary control valve for a vehicle hydrostatic transmission includes a hydraulic pump and a hydraulic motor. The valve is configured to control both a direction and a speed of the hydrostatic transmission. The rotary control valve includes a rotary valve plate con... | 11/10/2009 |
| 7281376 | Hydraulic hybrid powertrain system A hydraulic hybrid powertrain system includes a power plant generating a high pressure fluid at an output, at least one drive motor responsive to the high pressure fluid for generating rotary motion at an output, and a mode selection device connected to the power pl... | 10/16/2007 |
| 7222680 | Pneumatic motor improvements and pneumatic tools incorporating same A pneumatic motor having a motor chamber having an inner surface with an eccentric longitudinal axis, a motive gas fluid inlet, and at least one end wall located transversely to the longitudinal axis with an exhaust aperture located therethrough. A rotor is rotatabl... | 05/29/2007 |
| 7150150 | Open hydraulic circuit including a relief valve device The circuit includes a main pump, a hydraulic motor, two main ducts, a selector for connecting the main ducts to the main pump or to a reservoir or for isolating them therefrom, a boost duct, and two pressure limiters disposed between the main ducts. A relief valve ... | 12/19/2006 |
| 7140179 | Valve An apparatus comprises a valve body having a cylindrical bore centered on an axis. A cylindrical core extends axially within the bore and is fixed relative to the valve body. A sleeve within the bore extends circumferentially about the core and is rotatable about th... | 11/28/2006 |
| 7121187 | Fluid powered control system with a load pressure feedback An apparatus controls fluid flow to an actuator. A feedback mechanism responds to a pressure differential that occurs across the actuator by altering the fluid flow. That pressure differential indicates acceleration of the actuator that can occur when the load actin... | 10/17/2006 |
| 7047737 | Oil-hydraulic vehicle An oil-hydraulic vehicle comprising (i) at least one oil-hydraulic pump 10 driven by an engine E, an input shaft of said oil-hydraulic pump being directly coupled with a crankshaft C of the engine, (ii) at least one oil-hydraulic motor 30 to drive at l... | 05/23/2006 |
| 6996982 | Method and device for switching hydraulic fluid supplies, such as for a hydraulic pump/motor A spool valve includes a first valve port coupled to a fluid source at a first pressure range, a second valve port coupled to a fluid source at a second, lower, pressure range, and first and second output ports coupled to a hydraulic device. The valve includes a val... | 02/14/2006 |
| 6959671 | Cooling system for work machine A cooling system for use in a work machine is provided, in which an increase in the load imposed on a fan driving circuit and occurrence of abnormal noise can be prevented without fail by means of an inexpensive arrangement at the time of switching the rotating dire... | 11/01/2005 |
| 6955045 | Oil pump system Variable displacement pump pumps oil to one or the other ports of an oil operated vehicle wheel motor to drive a lawn mower. ... | 10/18/2005 |
| 6902011 | Variable torque impact wrench Disclosed herein is a fluid control system for varying the power available to a fluid powered tool, a hydraulically driven impact wrench. The system disclosed herein varies power available to the tool by use of a bypass mechanism that is downstream of a directional ... | 06/07/2005 |
| 6263670 | Loop flushing circuit for lubricating rotating elements in a hydrostatic transmission module A loop flushing circuit for a hydrostatic transmission module includes a three position, three port pilot pressure operated loop flushing valve having a first inlet port fluidly connected to the first system pressure line, a second inlet port fluidly conn... | 07/24/2001 |
| 5992148 | Relief mechanism and hydraulic circuit equipped with relief mechanism If a first control valve 71 is arranged so as to change between a flow position A and a throttling position C by a fluid for switching purpose guided through a pilot channel 77, the flow area of a first intermediate channel can be changed in two steps. As... | 11/30/1999 |
| 5930997 | Driving device for a hydraulic motor A hydraulic motor driving apparatus includes a directional control valve for supplying discharge pressure fluid from a hydraulic pump into a first or second port of a hydraulic motor and returning the hydraulic fluid from the second or first port into a t... | 08/03/1999 |
| 5862665 | Apparatus for preventing reverse rotation for hydraulic actuator A reverse rotation preventing apparatus for a hydraulic actuator includes a hydraulic actuator for driving an inertia member, a main valve which is switched to a driving position in which a pressure oil is supplied to one of first and second ports of the ... | 01/26/1999 |
| 5836160 | Hydraulic system for driving axial piston type hydraulic motor A hydraulic system for driving an axial piston type hydraulic motor wherein a swash plate can tilt at a right angle relative to a shaft. The hydraulic system comprises a swash plate cylinder; a double-acting swash plate piston disposed in the swash plate ... | 11/17/1998 |
| 5799487 | Automatic inertial continuously variable hydrostatic transmission An automatic hydrostatic transmission in which two vane pumps have their pumping chambers coupled together in a closed circuit with a constant volume of hydraulic fluid, the volume of each pump being changed by the axial displacement of a moving side of t... | 09/01/1998 |
| 5592818 | Reversible hydrostatic transmission with dump valve A hydrostatic transmission is disclosed comprising a radial ball pump (11) and a radial ball motor (13) wherein the normal journal member (33) may be replaced by an alternative or modified journal member (33'), such that even with a reverse direction of a... | 01/14/1997 |
| 5575149 | Hydraulic swing circuit Roughness or jerkiness in a hydraulic swing circuit in an implement having a plurality of control circuits each having a work performing device (28), (30), (32) including a swing circuit having a hydraulic motor (32), which when under an aiding load may f... | 11/19/1996 |
| 5531071 | Hydraulic system A hydraulic system comprises a mechanical brake assembly having a brake piston engageable with an output rotation shaft of a hydraulic motor, a cylindrical casing having the brake piston slidably received therein and a brake spring resiliently urging the ... | 07/02/1996 |
| 5499503 | Hydraulic swing circuit Roughness or jerkiness in a hydraulic swing circuit in an implement having a plurality of control circuits each having a work performing device (28), (30), (32) including a swing circuit having a hydraulic motor (32), which when under an aiding load may f... | 03/19/1996 |
| 5481873 | Hydraulic actuating system for a fluid transfer apparatus A hydraulic drive system for actuating a reciprocating member such as a polished rod in a pump jack device, and for acting as a counterbalance and/or for energy conservation. The system has two hydraulic circuits and a prime mover. A first circuit include... | 01/09/1996 |
| 5421156 | Hydraulic drive system A hydraulic drive system has a consumer of hydraulic power connected to a pressure medium source, e.g., a hydraulic motor 1. The consumer can be actuated by a control valve 4 throttling in intermediate positions; its width of opening is determined by a pr... | 06/06/1995 |
| 5419132 | Inertial body drive mechanism An inertial body drive mechanism which is arranged to prevent a reversing motion of a hydraulic motor 1 after an inertial rotation and which is capable of stopping the hydraulic motor 1 quickly together with an inertial body. An oil chamber 26 of a revers... | 05/30/1995 |
| 5361584 | Hydrostatic drive system A hydrostatic drive system including a pump and a hydraulic motor in an open circuit which includes a feed line and a control valve in the feed line on the inflow side of the hydraulic motor to control the quantity of hydraulic pressure medium supplied to... | 11/08/1994 |
| 5293747 | Power regulator for a pressure fluid motor A method and device for regulation of the output power of a fluid power motor involving the bypass of a selected portion of the supplied pressure fluid to the motor exhaust as a means of effectively reducing the available pressure drop across the motor an... | 03/15/1994 |
| 5220790 | Assembly of a pressurized fluid motor with multiple cubic capacities and a brake associated therewith The assembly of a fluid motor with two cubic capacities and of a brake which is coupled thereto, is disclosed. According to the invention, the large cubic capacity of the motor can be selected only when the brake is in its brake-release configuration. One... | 06/22/1993 |
| 5211015 | Hydraulic circuit for limiting the torque of a hydrostatic hydraulic motor connected in closed circuit to a hydraulic pump The invention refers to a hydraulic circuit for limiting the torque of a hydrostatic hydraulic motor connected in closed circuit to a hydraulic pump, which in braking mode operates as a hydraulic pump, in which pressure control valves are connected before... | 05/18/1993 |
| 5197283 | Hydraulic-motor drive circuit system with anti-cavitation control A hydraulic-motor drive circuit system includes an auxiliary hydraulic source connected to one end of an auxiliary line, a low-pressure selector connected to the other end of the auxiliary line and a pair of main lines for causing the other end of the aux... | 03/30/1993 |
| 5177964 | Hydraulic drive traveling system A hydraulic drive traveling system has a pressure compensated low control valve connected between a hydraulic pump and a variable displacement type hydraulic motor for controlling a flow rate of the hydraulic fluid supplied to the motor. The flow rate is ... | 01/12/1993 |
| 5159813 | Slewing control device for crane A slewing control device for a hydraulic slewing crane adapted to supply a discharge oil from a hydraulic pump through a slewing control valve to a slewing motor and control a rotational direction and a rotational speed of the slewing motor. The slewing c... | 11/03/1992 |
| 5158150 | Hydraulic wheelchair A hydraulic system for powering a vehicle for human transporation. The output of a hydraulic pump is connected to at least one hydraulic motor by a hydraulic circuit, the motor(s) being mechanically connected to drive the vehicle. The hydraulic circuit es... | 10/27/1992 |
| 5107754 | Articulated mechanism with rotary vane motors An articulated mechanism for use as an articulated arm of an industrial robot, for example, includes a plurality of arms interconnecting articulations having respective fluid pressure angular displacement motors for angularly displacing the arms relativel... | 04/28/1992 |
| 5097745 | Speed control valve for a hydraulic motor speed controlled by pressure between throttle and motor A control block, having few moving parts and few bores, for the hydraulic drive of an airplane control surface comprises a primary spool valve 2 which is shifted by two electromagnetic valves I, II to determine the direction of rotation of a hydraulic mot... | 03/24/1992 |
| 5062267 | Hydrostatic transmission containing an axial piston motor located in a recess of a valve controlled axial piston pump To make possible a small, compact construction of a hydrostatic transmission comprising a housing containing a valve-controlled piston pump, in particular an axial piston pump, which includes a first drive part rotatably driven by a drive shaft and a stat... | 11/05/1991 |
| 5058383 | Hydraulic motor control circuit A hydraulic motor control circuit for use in a device for driving construction equipment, such as shovel loader, which comprises a hydraulic driving motor, a pump for feeding compressed oil to the hydraulic motor and a tank for receiving the compressed oi... | 10/22/1991 |
| 5046312 | Swivel speed control circuit for working vehicle A hydraulic circuit for controlling the deck swiveling speed of a working vehicle comprises a hydraulic actuator for driving the swivel deck, a flow control valve for controlling a rate of oil flow to the hydraulic actuator, and a direction control valve ... | 09/10/1991 |
| 5018935 | Automatic pressure relief system for a hydraulic motor A check valve assembly having first and second check valves and an unseating spool is positioned between a control valve and a rotary motor. The unseating spool is elongated so that it continually contacts the valve elements of the check valves. The check... | 05/28/1991 |
