Did You Know...
...that to encourage use of his new invention, the shopping cart, market owner Sylvan Goldman hired fake shoppers to push the carts around his store in Oklahoma City? Seems his customers were reluctant to give up their hand-carried baskets.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7299739 | Hydraulic cylinder A fluid pressure cylinder has a piston rod 18 fixed to a piston 26 and projecting outside a cylinder body 23. A lock surface 43 inclining to a radial direction of the piston rod 18 is formed in an engagement member 31 provid... | 11/27/2007 |
| 7284473 | Fastening element and adapt cylinder cover of a fluid-actuated working cylinder An attachment element (12) for the selective pivotal and/or fixed bearing of a power cylinder, comprising a base region (33) having attachment means (45) for its attachment on a support structure (35) and from which two attachment arms ( | 10/23/2007 |
| 7243685 | High pressure closure A closure includes a hub having a bore in fluid communication with the port of a vessel. A door is removably positioned within the bore of the hub, and a locking ring is threaded with the hub thread for moving the door to a closed and circumferentially sealed positi... | 07/17/2007 |
| 7194990 | Electro-hydraulic engine valve actuation Hydraulic actuator as an element of a system for controlling an engine valve is presented. The actuator includes a fluidic actuation chamber, defined by an actuation piston that increases chamber volume as the actuation piston is urged away from a neutral. Chamber i... | 03/27/2007 |
| 7036421 | Driving device, particularly lifting device for a working vehicle The invention concerns a driving device, particularly a lifting device for a working vehicle, with a drive in the form of a hydraulic motor, the drive having a first connection and a second connection, a pump and a control valve arrangement between the drive and the... | 05/02/2006 |
| 6598513 | Cylinder apparatus A cylinder apparatus comprises a cylinder tube which is connected between a first cover member and a second cover member each having a cylindrical configuration, an axially displaceable piston which inscribes the cylinder tube, a piston rod which is conne... | 07/29/2003 |
| 6178868 | External pneumatic cushion system for air cylinder A system by which the air exhausted from either end of a pneumatic cylinder is directed, by an arrangement of control valves, to external surge tanks of appropriate volume where it is compressed to produce a deceleration effect at the end of each stroke b... | 01/30/2001 |
| 6164385 | Automatic depth control system and method An automatic depth control system is disclosed. The system includes a Console and remote Controller mounted in the tractor cab, power beyond Valving, and Depth Sensors, either ground contact or non-ground contact, mounted on the frame of the implement. Th... | 12/26/2000 |
| 6129001 | Method and valve apparatus for controlling a reciprocatable fluid actuated power machine A method and an apparatus for controlling the function of all kinds of reciprocable power machines which are actuated by pneumatic, hydraulic of any other pressure fluid, irrespective if the machines are of rotary or axially operating type, in which the a... | 10/10/2000 |
| 5799560 | Check valve for controlling the extracting movement of a pneumatic threaded fastener-setting tool A check valve for controlling a pneumatic threaded fastener-setting tool comprises a hollow cylinder housing connected between the tool and a pneumatic source for transmitting the air pressure therethrough, a retaining ring, a stopper member, a guider mem... | 09/01/1998 |
| 5613420 | Reciprocating engine An engine for driving a piston arrangement for pumping water from an inlet to an outlet at a higher level is disclosed. The engine includes a hollow housing having an inlet and an outlet between which liquid passes, the housing at least partly enclosing a... | 03/25/1997 |
| 4932311 | Fluid apparatus A fluid apparatus includes a pneumatic cylinder having a main body, a piston, and a hollow rod. A ball screw shaft engaged with a ball nut fixed to the piston is rotatably and axially unmovably mounted in the cylinder and extends in the hollow rod. A magn... | 06/12/1990 |
| 4889036 | Speed reducer for pneumatic actuator A speed-reducing valve assembly is provided in an air passage through which compressed air is discharged when a pneumatic actuator is decelerated. The speed-reducing valve assembly comprises a three-way valve actuated by a signal generated when the actuat... | 12/26/1989 |
| 4885978 | Fluid-operated miniature engine Miniature engine operated by an expanding gaseous fluid, which comprises a cylinder (18), piston (20) and inlet valve (29), the upper part of the piston (20) cooperating with a radially expansible resilient diaphragm (28), which is secured to the piston (... | 12/12/1989 |
| 4852664 | Hydraulic impact tool An impact tool for striking a tool such as a chisel includes a piston mounted in a cylinder. Upper, middle and lower chambers are formed therebetween. Pressure oil is fed into and discharged from the middle and lower chambers to reciprocate the piston in ... | 08/01/1989 |
| 4789131 | Pilot valve A pilot valve assembly is provided which substantially eliminates stalling in air motors. The pilot valve assembly is located on one end over an air piston such that when the air piston hits the trip rod, the trip rod compresses a trip spring which is in ... | 12/06/1988 |
| 4766802 | Small-sized engine operated by fluid Small-sized engine operated by an expanding gaseous fluid, which comprises a cylinder (18), a piston (20) and an inlet valve (38), the upper parts of the cylinder (18) and the piston (20) cooperating momentarily with a perforated (29) resilient membrane (... | 08/30/1988 |
| 4757744 | Apparatus for controlling flaps in an installation for heating and ventilating or for air-conditioning a motor vehicle Apparatus for controlling a plurality of moving members, e.g. the flaps in an installation for heating and ventilating or for air conditioning a motor vehicle, comprises single-acting actuators (46, 48) whose piston rods (50, 52) are connected to rotate t... | 07/19/1988 |
| 4506898 | Drift eliminator for series hydraulic lift system on tillage implements and the like The double-acting hydraulic cylinders of the lift system are connected in a master-slave series relationship. When the cylinders have been retracted to a predetermined extent, a control valve between the last slave and a primary selector valve of the syst... | 03/26/1985 |
| 4463659 | Cylinder stroke limiter A hydraulic cylinder stroke limiter has a valve for controlling fluid flow from a port of the cylinder. A flexible hose has one end fixed to the valve housing and the other end movably supported at the rod end of the cylinder by a pivotal bracket. A cable... | 08/07/1984 |
| 4404892 | Hydraulic operating apparatus A hydraulic operating apparatus including an actuating cylinder having a piston arranged therein and moved by a fluid under high pressure further includes a control valve having only one metallic seal whether the piston is at its upper or lower positions.... | 09/20/1983 |
| 4327810 | Tilting cab device for vehicles A device for the raising and lowering of a tilting cab of a road vehicle, with respect to the chassis of the vehicle on which the cab is pivoted, permits both lifting and lowering to take place under the control of a manual pump. The cab can also be left ... | 05/04/1982 |
| 4267767 | Position lock A manually operable position lock for a hydraulic actuator (10) adding a cylinder (20) and a piston rod (22) with a stop finger (61) for actuating a push rod (60) to close a valve (32) and prevent fluid egress from the cylinder. The lock includes a pivot ... | 05/19/1981 |
| 4233885 | Apparatus for improved motion control An improved type of hydraulic control cartridge with mounting structure and accessorial safety device for installation within both ends of reciprocative pneumatic actuators to permit a safe increase in their speed of operation. The safety device automatic... | 11/18/1980 |
| 4191498 | Hydraulic roof support control system A hydraulic control system is provided for a roof support unit of an underground mining installation. The roof support unit is provided with a roof cap supported by hydraulic props. The control system comprises a valve for controlling the supply of pressu... | 03/04/1980 |
| 4154147 | Press unloader with defrost and water drain valve A defrost and water drain valve suitable for use with air cylinders, such as used to furnish power to material handling equipment, is connected to receive air from the exhaust side of the piston and direct this air against the inlet end of the cylinder an... | 05/15/1979 |
| 4152970 | Fluid pressure supply apparatus A fluid pressure supply apparatus includes a fluid pressure source, a fluid supply circuit to receive fluid under pressure from the fluid pressure source, and a fluid return circuit. These circuits are to be coupled to an hydraulic motor through first and... | 05/08/1979 |
| 4151978 | Stroke limiting apparatus for hydraulic cylinders The invention relates to a valve assembly adapted in conjunction with a valve actuator to provide positive control of the stroke of hydraulic cylinders. The valve is attached to a pressure port on the cylinder and the actuator assembly is positioned on th... | 05/01/1979 |
| 4104899 | Pneumatic buffering system A pneumatically buffered drive system is provided which quickly moves a movable member, such as a press safety curtain or press bolster, a predetermined length in three sequential speed stages to prevent maximum acceleration from occurring at the end of t... | 08/08/1978 |
| 4099450 | Feed mechanism A fluid cylinder assembly includes a cylinder and a piston slidably disposed in the cylinder, the cylinder having a cylinder bore closed at both ends by end caps. One of the end caps is provided therein with a flow control valve assembly for controlling t... | 07/11/1978 |
| 3983790 | Brake actuator A brake actuator for a vehicle having air brakes is disclosed in which air pressure is expelled through the actuator upon release of the brakes in order to purge the latter of contaminants. The actuator includes a housing in which a piston reciprocates. F... | 10/05/1976 |
| 3975992 | Lift control system for press unloader or the like There is herein disclosed a lift control system for a press unloader having an extendable and retractable jaw means for gripping and removing a part from the die cavity of a press with pivotal frame means supporting the jaw means for pivotal movement to l... | 08/24/1976 |
| 3972265 | Stroke control device A stroke control mechanism for a hydraulic actuator having a piston and cylinder device including a blocking valve for selectively blocking fluid flow from one side of the actuator, the blocking valve consisting of a spring biased check valve mounted on o... | 08/03/1976 |
| 3967539 | Variable stroke fluid cylinder An adjustable stroke length fluid cylinder used to move agricultural or industrial machinery is disclosed. The cylinder is an enclosed unit having a movable piston therein which is attached to an axial piston rod secured to the load. A fluid valve directs... | 07/06/1976 |
