Bizarre Patents
Pillow with retractable umbrella
A pillow assembly having a supporting assembly and a retractable umbrella assembly that is easily transportable and allows a user to support his/her head while covering their face from sunlight.
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 |
| 7310965 | Compressor head, internal discriminator, external discriminator, manifold design for refrigeration recovery apparatus The compressor head, internal and/or external discriminator, and manifold design in general utilize ball valves on the suction and discharge of a cylinder head in the recovery of refrigerant liquid and/or vapor. The device facilitates the flashing of liquid refriger... | 12/25/2007 |
| 7275373 | High pressure device and method for clean room applications A device uses hydraulic actuation for the closure of a vessel by a rotation-symmetric reciprocating piston mechanism of an extremely compact type, which includes a reciprocating hydraulic piston and an intensifier piston, which are in each case moved in cylinders. T... | 10/02/2007 |
| 7159412 | Compressor head, internal discriminator, external discriminator, manifold design for refrigeration recovery apparatus The compressor head, internal and/or external discriminator, and manifold design in general utilize ball valves on the suction and discharge of a cylinder head in the recovery of refrigerant liquid and/or vapor. The device facilitates the flashing of liquid refriger... | 01/09/2007 |
| 7086784 | Bearing unit for the hub of a vehicle wheel equipped with a tire inflating system A bearing unit comprises a radially outer stationary race (1) and a pair of radially inner rotatable half-races (2a, 2b). Au intermediate annular chamber (8) is defined between the outer race (1) and the inner half-ra... | 08/08/2006 |
| 7073346 | Compressor head, internal discriminator, external discriminator, manifold design for refrigerant recovery apparatus and vacuum sensor The compressor head, internal and/or external discriminator, and manifold design in general utilize ball valves on the suction and discharge of a cylinder head in the recovery of refrigerant liquid and/or vapor. The device facilitates the flashing of liquid refriger... | 07/11/2006 |
| 7073643 | Compensated rod for a frequency dependent damper shock absorber A frequency-dependent damper incorporates a compensated piston assembly to reduce the amount of static push-out force. The piston rod is a hollow rod with a compensator being disposed within the hollow portion of the piston rod. The piston rod is a hollow rod with a... | 07/11/2006 |
| 6953323 | Medical fluid pump A method, system and apparatus for performing peritoneal dialysis are provided. To this end, in part, a pump for a dialysis system is provided. The pump includes a first chamber wall including a first aperture, a second chamber wall including a second aperture, a pi... | 10/11/2005 |
| 6796215 | Membrane pump A membrane pump (104) with an operating membrane (1) delimiting a conveying space (2), and a supplemental membrane (3) arranged on the side of the operating membrane (1) facing away from the conveying space (2), with a membr... | 09/28/2004 |
| 6755018 | Leakage oil return apparatus for a hydraulic motor The invention relates to a leakage oil return apparatus for a hydraulic motor. The apparatus is used for returning the oil leaked from the working pressure space of a motor (1) into a motor casing (12) from the casing (12) back to a return line ... | 06/29/2004 |
| 5899136 | Low leakage plunger and barrel assembly for high pressure fluid system An improved plunger and barrel assembly is provided which includes a plunger reciprocally mounted in a cavity formed in the barrel and a leakage flow reduction device positioned in the cavity for reducing fluid leakage flow around the plunger thus increas... | 05/04/1999 |
| 5888056 | Diaphragm pump A diaphragm pump having a simple structure for effectively preventing pulsation of liquid being discharged, which includes an air chamber connected to a head-side discharge hole of the diaphragm pump and having a discharge-side discharge hole, and thereby... | 03/30/1999 |
| 5743168 | Device for lubricating an assembly between two mechanical components which can move with respect to each other, especially a connecting rod/piston articulation A device including a first moving part such as a piston (1) and a second moving part such as a connecting rod (2) with a coupling part (4) therebetween. A low-pressure compressible liquid lubricant feed system delivers a liquid into a chamber (10) with a ... | 04/28/1998 |
| 5732811 | Ram with two control chambers and a clutch release bearing provided with such a ram The fluid-pressure ram, for controlling a clutch release bearing for an automobile clutch, has two variable-volume control chambers which follow each other axially and comprise a primary chamber which is fed with pressurized fluid and which is axially del... | 03/31/1998 |
| 5701797 | Sealing system A piston reciprocally movable within a cylinder is sealed to the cylinder wall by fluid at a pressure greater than those of the fluids on the opposed sides of the piston supplied to the space (18) between two seals (19, 20) operative between the piston an... | 12/30/1997 |
| 5600955 | Hydraulic servoactuator stabilizer device Unbalanced oscillatory pressures, developed on the power piston of hydraulic servoactuator systems cause vibrations on actuator housing supports. An unbalanced oscillatory force results, when two sides of the power piston are subjected to two unequal osci... | 02/11/1997 |
| 5515769 | Air compressor An oilless reciprocating compressor for use in a refrigerated controlled atmosphere has an uncooled, fully sealed crankcase. A bypass tubing connects the interior of the crankcase with the inlet of the cylinders, so that blow-by is returned from the crank... | 05/14/1996 |
| 5493954 | Self-venting seal assembly A self-venting seal assembly for use in an ultrahigh-pressure pump is shown and described. In a preferred embodiment, a low-pressure seal is used to energize a high-pressure seal, the low-pressure seal having a "u" shaped cross-section, thereby creating a... | 02/27/1996 |
| 5415078 | Reciprocating piston machine This invention relates to reciprocating piston machines which use the crankcase for pumping air or charge. The connecting rod with extension partitions the interior of the crankcase including the lower cylinder into two varying volumes during a portion of... | 05/16/1995 |
| 5410947 | Volume-compensated low-wear reciprocating seal assemblies A fluid-powered actuator (42) has a body (11) which includes an end wall (16) provided with a through-opening (21). A piston rod (44) has an inner portion (44A) arranged on one side of the end wall within a pressurizable working chamber (24) of the actuat... | 05/02/1995 |
| 5377488 | Hydro-pneumatic pressure transformer A hydro-pneumatic pressure transformer with a storage piston fixed between storage oil and compressed air, which furthermore is centrally penetrated by a plunger piston, wherein, for the separation of oil from water, relief grooves are provided on the jac... | 01/03/1995 |
| 5341726 | Piston for tank An elongate tank for transport or for storage in bulk of semisolid and fluid materials, such as grease and oil. The tank has an outlet at one end thereof for discharging material contained therein, and has a generally cylindric interior surface. A general... | 08/30/1994 |
| 5314172 | High pressure die cylinder and manifold system A high pressure die cylinder and manifold system including a plurality of die cylinders mounted on a manifold. Each die cylinder includes a cylinder body in which a piston rod and a piston is positioned for limited relative movement with respect to the cy... | 05/24/1994 |
| 5302087 | High pressure pump with loaded compression rods and method A high pressure pump includes a housing having a pump chamber therein for receiving a pump piston, and a separate pressure housing having a liquid pressure chamber therein in fluid communication with a pump discharge flow line within an outlet housing. A ... | 04/12/1994 |
| 5265423 | Air-oil pressure intensifier with isolation system for prohibiting leakage between and intermixing of the air and oil The present invention is drawn to an isolation system for separating two diverse fluid mediums from each other and, more particularly, an isolation system for prohibiting leakage of the diverse mediums around the peripheral surface of a piston movably mou... | 11/30/1993 |
| 5241895 | Air-powered splined rotary actuator An air-powered actuator having a body with first and second ends, an axially transverse annular bulkhead positioned therebetween, and an output shaft with a splined exterior portion. The body includes first and second end walls with each end wall having a... | 09/07/1993 |
| 5228378 | Force applicator A force applicator comprises a ram operable by fluid under pressure. A pressure pad (7) is located between one movable part of the ram (3) and the load (9) and means are provided which enable relative movement to take place between the pressure pad and th... | 07/20/1993 |
| 5056419 | Sealing device for a piston rod of a stirling engine The present invention relates to a sealing device provided between a piston rod of a Stirling cycle engine and a variable volume chamber. The sealing device is provided with an arrangement so as to equalize pressures between a seal chamber and the variabl... | 10/15/1991 |
| 4887515 | Hydraulic cylinder apparatus A hydraulic cylinder apparatus is used by connecting an external pressure source with extension and contraction-side liquid chambers defined by a cylinder, a piston sliding in the cylinder and a piston rod integral with the piston. The apparatus includes ... | 12/19/1989 |
| 4719844 | Shaft alignment system for pumps A shaft alignment system for pumps which utilizes a clamp for holding a reciprocating shaft to a piston in an abutting relationship. The clamp can be loosened and retightened after the piston, which is attached to the reciprocating shaft, is inserted in a... | 01/19/1988 |
| 4691620 | Self-flushing fluid seal assembly A self-flushing fluid seal assembly is provided to prevent particle intrusion into the main seal around a slurry pump shaft. The assembly includes an annular tube concentrically disposed about the pump shaft and forming a chamber. The volume of the chambe... | 09/08/1987 |
| 4597322 | Seal assemblies A seal assembly is arranged to contain leakage of hydraulic fluid passing between a wall opening and a penetrant rod portion passing through the opening. The seal assembly includes a sliding-seal member mounted on a portion of the rod for sliding movement... | 07/01/1986 |
| 4509409 | Pump arrangement for a linear fluid operated device This invention relates to a pump arrangement (54) for use in a linear fluid operated device having a reciprocating piston (14) separating a first active fluid chamber (30) and a second chamber (32) which eliminates the problem associated with fluid leakag... | 04/09/1985 |
| 4463663 | Hydraulic cylinder assembly with a liquid recovery system A compressible bellows surrounds a piston rod of the hydraulic cylinder of a hydraulic elevator. The lower end of the bellows surrounds a liquid receiving recess in the gland box of the cylinder and, when a sealing ring on the piston rod closes and compre... | 08/07/1984 |
| 4055107 | Apparatus for removing fluid in a piston cylinder assembly This disclosure relates to an apparatus for use with a piston cylinder assembly and includes one or more rod scraper elements employed for the removal and retention of any fluid adhering to the surface of the piston rod during its operation, which fluid i... | 10/25/1977 |
| 4036112 | Rolling diaphragm sealing devices A sealing device between a reciprocator and a stationary encircling housing comprises first and second rolling diaphragms at opposite ends of the reciprocator and exposed to higher and lower pressures, respectively, diaphragm-supporting liquid in first an... | 07/19/1977 |
| 4017214 | Packing gland leak retriever device Disclosed is a leak retriever for the packing gland on oil well pumps. The leak retriever has a reservoir disposed about the packing gland to collect oil which leaks through the gland and an auxiliary pump which is mounted in the reservoir and connected t... | 04/12/1977 |
| 3988969 | Rotary hydraulic jack A rotary hydraulic jack having two jack compartments, comprising a rotary hydraulic joint for the supply of hydraulic liquid to and the evacuation of hydraulic liquid from at least one of the compartments. The hydraulic joint comprises a fixed, hollow cyl... | 11/02/1976 |
