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| Number | Title | Issue Date |
| 7251879 | Installation, insulation displacement, and terminating tool having piston-cylinder driving assembly An installation, insulation displacement, and terminating power tool, for inserting electrical wires into, and for electrically connecting the electrical wires to electrical contact members disposed within, an electrical connector, comprises a piston-cylinder drivin... | 08/07/2007 |
| 7240771 | Mast staging hydraulic circuit A multistage mast assembly for use on a lift truck and method of operation for staging first and second mast sections of the multistage mast assembly. Each mast section has a retracted position and an extended position. The apparatus includes a mast staging hydrauli... | 07/10/2007 |
| 7137331 | Hydraulic cylinder device A pair of hydraulic cylinders 10 which are coupled to a driven member, placed parallel to each other and extend/contract in synchronization with each other, and a control valve 20 which controls hydraulic fluid supplied to or discharged from the hydrau... | 11/21/2006 |
| 7128152 | Method and apparatus to selectively reduce wellbore pressure during pumping operations A downhole tool has at least one diverter valve. The diverter valves are used to reduce pressure in a wellbore caused by frictional resistance to fluid flow during a gravel pack operation. The increased pressure tends to be created as the beta wave of a gravel pack ... | 10/31/2006 |
| 7114429 | Power steering assist apparatus and method of retrofitting A power steering assembly and method of retrofitting therefore includes a housing having a cavity defined therein. A drive member extends axially into the cavity and a first piston and a second piston are received in the cavity for axial reciprocation therein. The f... | 10/03/2006 |
| 6997221 | Reach actuation for energy saving hydraulic knuckle booms The knuckle boom includes a hoist boom having a proximal end pivoted to a machine base, and a stick boom having a proximal end pivoted to a distal end of the hoist boom. At least one hydraulic hoist cylinder is mounted between the machine base and the hoist boom, an... | 02/14/2006 |
| 6715402 | Hydraulic control circuit for operating a split actuator mechanical mechanism A system for simultaneously operating first and second hydraulic cylinders has an inlet node for connection to a source of pressurized fluid and an outlet node for connection to a tank. A two-position, three-way primary control valve has a first port connected to th... | 04/06/2004 |
| 6584884 | Integral valve-cylinder assembly and fork positioning system An integral valve-cylinder assembly and a fork folding hydraulic system for front loading waste collection vehicles is provided that allows the forks to be full tucked for over-the-road travel and without exceeding the vehicle height limit that uses a mul... | 07/01/2003 |
| 6397726 | Device for path-dependent control of force generated by a piston The invention provides a method and apparatus for controlling in a path-dependent manner the force generated by a piston. A first piston travels in a first cylinder--divided into a first and second chamber by the first piston--together with a pressure flu... | 06/04/2002 |
| 5743167 | Pneumatic booster A tandem pneumatic booster having a shell body, the inside of which is divided into two, front and rear, chambers by a center shell. Each chamber includes a negative pressure chamber and a working pressure chamber. A valve body is slidably fitted in the s... | 04/28/1998 |
| 5707201 | Forklift truck side shifter A removable side shifter attachment attachable to the carriage bar of a lift truck has a frame shiftable with respect to the truck. The frame includes a shifter carriage bar for receiving a lift fork. A hydraulic cylinder attached to the truck carriage ba... | 01/13/1998 |
| 5680807 | Vacuum brake booster for motor vehicles To prevent a rolling diaphragm (13), which forms the movable wall (4) of a vacuum brake booster along with a metallic diaphragm disk (12), from becoming detached from an annular groove (52) accommodating a radially inner bead (32) of the rolling diaphragm... | 10/28/1997 |
| 5664479 | Tandem vacuum booster A tandem vacuum booster includes a front shell and a rear shell which are connected to each other to form a housing, a front movable wall having an outer circumferential portion that is fit in a fluid-tight manner between the front shell and the rear shel... | 09/09/1997 |
| 5570622 | Power booster with guided power piston A guide rod extends longitudinally through the power piston of a vacuum power booster providing lateral support thereto and tying the master cylinder housing to a bracket on the rear of the power booster housing. A guide rod provides a means of positively... | 11/05/1996 |
| 5522302 | Cylinder and piston assembly and method of porting A multi-piston assembly is illustrated wherein a cylindrical housing (A) is ported through longitudinal circumferentially spaced ports (F) and (G) carried within the cylindrical housing. Porting through piston rods is thus avoided so that their cross sect... | 06/04/1996 |
| 5450781 | Booster An improvement of the inner periphery of a power piston which is connected to a valve body of a booster is disclosed. The inner periphery of the power piston comprises a radial portion which is disposed in abutment against an end face of a step formed on ... | 09/19/1995 |
| 5323689 | Method of manufacturing a tandem brake booster A method of manufacturing a tandem brake booster by selectively choosing a front shell having a first cylindrical body with first effective diameter, a transition shell having a second cylindrical body with a second effective diameter and a rear shell hav... | 06/28/1994 |
| 5308215 | Passenger lift movable at variable speeds A hydraulic drive passenger lift with distinct lifting "up and down" (loading, unloading) and "fold-unfold" (storage) motion patterns, includes a flow control structure that accommodates various hydraulic flows, somewhat unrestricted for "up-and-down" mov... | 05/03/1994 |
| 5305606 | Actuating unit for hydraulic brake systems The present invention discloses an actuating unit that achieves shortening of the actuating travel of the brake power booster when the brake system is precharged. The actuating unit is preferably used with hydraulic brake systems of automotive vehicles ha... | 04/26/1994 |
| 5277100 | Tandem type vacuum booster In a tandem type vacuum booster, the inner peripheral end of a front booster piston and the inner peripheral bead of a front diaphragm are clamped between a front end of a sleeve fitted over the outer periphery of a piston boss and a flange provided on th... | 01/11/1994 |
| 5233911 | Tandem brake booster A method of manufacturing a tandem brake booster wherein a rearwall is derived from the separation plate of a single brake booster. The separation plate is modified by creating a passageway therethrough and using splines on the hub which are mated with ke... | 08/10/1993 |
| 5214996 | Vacuum brake-booster of the tandem type The invention relates to a vacuum brake-booster of the tandem type comprising two compartments (22, 24) separated by a stationary plate (20), each of the compartments being divided into a front chamber and a rear chamber by way of a piston (26, 28) and of... | 06/01/1993 |
| 5142964 | Negative pressure booster A negative brake booster having a power piston 8 with a piston unit 8a extending in a radial direction, a cylinder unit 8b provided at a backward position in an axial direction and airtightly and slidably supported on a center plate 4. A front diaphragm 1... | 09/01/1992 |
| 5115719 | Pneumatic booster A pneumatic booster for use, for example, in a brake system of a vehicle, and designed so that the overall axial length is reduced without interfering with the operation thereof. The booster comprises a valve body which is movable back and forth between f... | 05/26/1992 |
| 5111734 | Booster An improvement of a variable pressure passage which is formed in a valve body of a booster, for example, a brake booster, is disclosed. The valve body which is disposed within a shell of the booster comprises a first and a second tubular member which are ... | 05/12/1992 |
| 5086690 | Booster interlock divider and diaphragm concept A peripheral sealed interlock for a dual diaphragm tandem vacuum booster with front and rear housings is provided. An outer radial peripheral end of a divider of the inventive interlock is greatly simplified and in the preferred embodiment a bead of a sec... | 02/11/1992 |
| 5083495 | Brake booster with one-way valve on centerplate A brake booster includes a center plate disposed within a shell. A seal member is provided to interrupt a communication between a variable and a constant pressure chamber which are located across the center plate. The seal member is formed with a lip, act... | 01/28/1992 |
| 5063830 | Brake booster An improvement relating to a front shell of a brake booster and a reinforcing plate which is connected to and extends along the inner surface of the front shell is disclosed. A radially inward portion of the front shell is formed with a cylindrical sectio... | 11/12/1991 |
| 5029515 | Pneumatic booster A pneumatic booster comprising a housing, a power piston separating the inside of the housing into a constant pressure chamber and a variable pressure chamber, a valve body attached to the power piston, an output shaft, a plunger slidably received in a bo... | 07/09/1991 |
| 4922804 | Variable speed hydraulic unit The variable speed hydraulic unit has the peculiarity of comprising a fixed body and a rotatable body with hydraulic actuation and fixed displacement, which are operatively interconnected. The output shaft of the fixed body is rigidly associated with the ... | 05/08/1990 |
| 4896748 | Full free lift mast assembly A full free lift mast assembly having a first pair of spaced apart uprights, a second pair of spaced apart uprights mounted on the first pair of uprights and elevationally movable therealong and a carriage mounted on the second pair of uprights is provide... | 01/30/1990 |
| 4882979 | Dual-piston acuator A fluid-powered actuator having a body with first and second end walls, with a bulkhead positioned therebetween, which is adjustably rotatable to angularly position the bulkhead relative to the body for fluid-powered operation to establish the end limits ... | 11/28/1989 |
| 4759260 | Super reliable air-spring return air cylinder This invention relates to a fail-safe or auto-return actuator cylinder employing the air spring effect provided by compressed air trapped in an air-spring compartment; which air spring effect replaces the conventional mechanical coil spring employed in co... | 07/26/1988 |
| 4706710 | Cylinder-mounted rotary valve A cylinder valve includes a body with a threaded extension defining a first output port which screws directly into the cylinder port. An input port connected to a source of hydraulic fluid communicates with the first output port through an axially extendi... | 11/17/1987 |
| 4651843 | Compact assisted steering system for a motor vehicle The mechanism comprises two movable cylinders (7, 9) which are sealingly slidably mounted on respective stationary pistons which are firmly carried by rods (3, 4) mounted in a stationary casing (1). One of the cylinders (9) supports a rack (11) which mesh... | 03/24/1987 |
| 4650377 | Right angle drill An improved right angle drill including a pneumatically powered motor and feed and retract apparatus driven by the motor. The feed and retract apparatus includes a control valve for controlling the flow of pressurized air to the motor and to the feed and ... | 03/17/1987 |
| 4516474 | Tandem diaphragm brake booster A tandem diaphragm brake booster includes a housing, first and second diaphragms disposed in said housing, a partition wall disposed between said first and second diaphragms within said housing for defining four pressure chambers. The housing is composed ... | 05/14/1985 |
| 4430924 | Petroleum pumping unit A petroleum pumping unit which is especially suitable for use in remote oil fields and under unpredictable pumping conditions is disclosed. The petroleum pumping unit of the present invention, which is easily movable between a folded, collapsed position f... | 02/14/1984 |
| 4377966 | Servo boosters for vehicle braking systems In a servo booster for a vehicle braking system, of the kind having a tie rod for relieving the booster housing of braking reaction forces which extends through the movable wall(s) of the booster, the movable wall is sealingly connected to a wall of the h... | 03/29/1983 |
| 4335733 | Valve for use in handling abrasive materials and method of wear prevention A valve, comprising: a cylindrical casing, closed at its ends by covers, and having axially aligned inlet and outlet chambers midway of its length disposed at right angles to the axis of the casing. Communication between said chambers is controlled by a p... | 06/22/1982 |
