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 |
| 7255546 | Spindle for a vane motor The spindle of a vane motor is designed to enhance the power, speed and torque by undercutting the spindle adjacent to the vanes on the power stroke side to increase the working area of the vanes and by adding slots intermediate the vane formed in said spindle and e... | 08/14/2007 |
| 7150610 | Gas compressor To reduce an excessively high vane back pressure to an appropriate pressure to thereby relieve operational load, and to improve the vane projectability at the start and during low speed operation to thereby prevent chattering; There are provided back pressure spaces... | 12/19/2006 |
| 7134856 | Compressed air motor The invention relates to a compressed air motor comprising a housing and a rotor rotatably mounted therein, the rotor being provided with substantially radial slots and plate-like vanes being mounted in the slots so as to be radially displaceable by the centrifugal ... | 11/14/2006 |
| 7128544 | Crescent seal for the cylinder of a vane motor A vane motor is modified to increase the sealing effectiveness of the gap made at the interface of the spindle and cylinder by undercutting the cylinder a predetermined amount and distance so as to increase the effectiveness of the spindle to cylinder gap and to dec... | 10/31/2006 |
| 7083394 | Vane pump with undervane feed A vane pump is disclosed for use with gas turbine engines which has pressurized fluid supplied to the undervane portion of the vane elements to balance the forces imparted thereon. The vane pump includes a pump housing, a cam member, a cylindrical rotor member and a... | 08/01/2006 |
| 6877969 | Vane pump Within an angular area where each vane of a vane pump having backpressure grooves is moved radially inwardly as the rotor rotates, the outer circumferential edge of the backpressure groove is indented toward the rotational axis of the rotor along a locus drawn by th... | 04/12/2005 |
| 6503068 | Variable capacity type pump In a variable capacity type pump, in the inner diameter of a cam ring, an inner diameter of a portion forming a middle section between a suction section and a discharge section in a pump chamber is constituted by a negative slope curve in which an end por... | 01/07/2003 |
| 6422845 | Rotary hydraulic vane pump with improved undervane porting The pump has a multi-vane rotor operating within a cam ring to pump oil to a component such as a power steering gear. The pump rotor sandwiched between stationary thrust and pressure plates is supplied with oil from a surrounding fluid chamber through ali... | 07/23/2002 |
| 6375441 | Back pressure groove structure of variable displacement vane pump In the back pressure groove structure of a variable displacement vane pump comprising a rotor rotatably contained in a pump housing and having a plurality of vane grooves arranged radially and equidistantly in a circumferential direction, a cam ring is ar... | 04/23/2002 |
| 6203303 | Vane pump A vane pump is composed of a rotor that is rotatably disposed in a cam ring attached to a housing, a plurality of vanes that are slidably disposed in corresponding slits formed in the rotor in which the vane is projected from the slit upon rotation of the... | 03/20/2001 |
| 6132196 | Fluid vane motor/pump A motor/pump (10) comprises a housing (12) defining a cavity (18) between sealed ends (14 and 16). Rotor (24) having a substantially hollow body (26) is supported by the housing (12) for rotation within the cavity (18) about a rotation axis (28) which is ... | 10/17/2000 |
| 6019585 | Oil-sealed vane-type rotary vacuum pump with oil feed The invention concerns an oil-sealed vane-type rotary vacuum pump with a suction chamber (8) housing a rotatably mounted rotor (3) which has an anchoring section (21) and a bearing section (23) with a slot (24) in which two vanes (26) are mounted with a s... | 02/01/2000 |
| 5946903 | Internal combustion engine having a separate rotary combustion chamber An external combustion engine for driving a power shaft, which includes a rotary combustion chamber having an eccentric rotor and a plurality of telescoping vanes extending from the rotor to the inner walls of the combustion chamber. The vanes divide the ... | 09/07/1999 |
| 5807090 | Vane pump having a hydraulic resistance element A pump, particularly a vane or roller pump, with at least two pump segments, each having a suction region and a pressure region, with a first fluid path leading from the pressure side to a consumer, and with at least one hydraulic resistance element, whic... | 09/15/1998 |
| 5289681 | Power steering system An oil pump which delivers an operating oil to a power steering mechanism of vehicle is designed to reduce the power which is wasted during a high speed operation. A subpump of a reduced capacity having a number of revolutions which varies with a vehicle ... | 03/01/1994 |
| 5259741 | Rotary drainage pump lubrication device and separator A device to separate muddy water from slurry which is being drained away and a means to use said muddy water to both seal and lubricate a gap between the guide channels and the vanes of the drainage pump, thereby securing the efficient long-term functioni... | 11/09/1993 |
| 5169299 | Rotary vane compressor with reduced pressure on the inner vane tips In a rotary vane hermetic compressor an improved loading structure is provided for the vanes. A pressure reducing means incorporated into the compressor rotor reduces the frictional loading of the vane tips against the compressor walls. A passageway vents... | 12/08/1992 |
| 5073097 | Multi-chamber rotary lobe fluid machine with positive sliding seats A rotary fluid machine including a rotor provided with a plurality of lobes, a ring surrounding the rotor and with the lobes defining a plurality of chambers, a housing surrounding the ring and provided with a plurality of depressions which together with ... | 12/17/1991 |
| 5051065 | Power transmission A rotary hydraulic vane pump includes a rotor mounted within a housing, with a plurality of vanes individually slidably disposed in corresponding slots in the rotor periphery. A cam ring surrounds the rotor within the housing and has a radially inwardly f... | 09/24/1991 |
| 5033946 | Rotary vane machine with back pressure regulation on vanes A rotary machine includes a stationary housing having a rotor chamber and a rotor rotatably mounted in the rotor chamber, the inner peripheral surface of the rotor chamber having a central axis which is eccentrically disposed relative to the axis of rotat... | 07/23/1991 |
| 5030071 | Roller van motor with fluid biassed roller A roller vane motor as described, the motor having a stator with a generally cylindrical chamber provided with fluid inlet and outlet means. A rotor is provided in the chamber to be rotatable therein, the rotor having a slot to receive a roller which form... | 07/09/1991 |
| 4947646 | Radial vane hydraulic machine There is provided a positive displacement hydraulic rotator unit capable of operating in either direction of rotation. The rotator unit comprises a housing defining a substantially cylindrical internal chamber centered about a first central axis, and a ro... | 08/14/1990 |
| 4610614 | Vane pump In a vane pump, a pump housing contains a cam ring having an internal cam surface, in which a rotor carrying eight vanes is rotatable by a drive shaft. A pair of side plates positioned in the receiving bore in contact engagement with the opposite end surf... | 09/09/1986 |
| 4543049 | Vane compressor with means for obtaining sufficient back pressure upon vanes at the start of compressor Front and rear radial roller bearings are provided in front and rear side blocks of the pump housing. A partition wall member is secured to an end face of the rear side block remote from the rotor to define a sealing chamber therebetween. The sealing cham... | 09/24/1985 |
| 4538976 | Vane compressor having suction port and discharge port located at the same axial side thereof A partition member is fitted within a casing at a location between an end wall of a pump housing accommodated within the casing and an opposed inner end face of the casing and cooperates with the one end wall to define a suction chamber therebetween. A fi... | 09/03/1985 |
| 4523897 | Two stage vacuum pump The invention pertains to a two stage vacuum pump particularly suitable for servicing refrigeration systems wherein a pair of electrically driven rotors support outwardly movable vanes engaging the cylindrical circumference of pumping chambers in which th... | 06/18/1985 |
| 4510659 | Method for manufacturing a vane compressor having a lightweight rotor A vane compressor is provided which has a rotor formed therein with a plurality of axial slits opening in its outer peripheral surface in a circumferentially spaced arrangement, and in each of which a vane is received, and a plurality of cavities located ... | 04/16/1985 |
| 4479763 | Rotary compressor A sliding-vane type oil free rotary compressor comprising a rotary sleeve rotatably mounted in a center housing, a rotor eccentrically contained in the rotary sleeve, and a plurality of vanes movably fitted in the rotor. The rotary sleeve and the center h... | 10/30/1984 |
| 4469474 | Axially slidable vane motor with valves in fluid-based vanes Hydrostatic motor with axially slidable vanes. The invention relates to a hydrostatic motor having vanes sliding axially in rotor lodgings against a continuous stator bottom surface with recesses therein. The motor comprises an intercommunication circuit betwe... | 09/04/1984 |
| 4415321 | Vane compressor having a lightweight rotor A vane compressor is provided which has a rotor formed therein with a plurality of axial slits opening in its outer peripheral surface in a circumferentially spaced arrangement, and in each of which a vane is received, and a plurality of cavities located ... | 11/15/1983 |
| 4408969 | Vane compressor having improved rotor supporting means A vane compressor is provided which includes a rotor which has an internal space formed at its central portion and communicating with a plurality of vane-inserted slits formed in its outer peripheral surface, and first and second axial through holes exten... | 10/11/1983 |
| 4394114 | Compressor A rotary compressor of the sliding vane type which is constructed to prevent seizure during high speed operation, with increased volume efficiency through reduction of leakage of refrigerant, and simultaneous improvements in refrigeration cycle efficiency... | 07/19/1983 |
| 4386891 | Rotary hydraulic vane pump with undervane passages for priming A balanced vane type hydraulic pump has a thrust plate and a pressure plate which cooperate with a cam ring, rotor and vanes to provide a plurality of pump chambers. During pump operation, fluid trapped under the vanes flows from under the vanes at the di... | 06/07/1983 |
| 4274816 | Rotary vane compressor with chamfered vane slots A rotor (18) is disposed in a bore (14) of a cylinder (13) and carries vanes (33), (34), (36), (37) in radial slots (28), (29), (31), (32), the vanes (33), (34),(36), (37) being urged into engagement with the wall of the bore (14) by oil pressure applied ... | 06/23/1981 |
| 4260343 | Vane compressor A vane compressor includes a hollow stator, and a rotor which is received in the stator for rotation about an axis. The rotor is provided with a plurality of throughgoing passages which extend radially and outwardly relative to the axis. Each passage rece... | 04/07/1981 |
| 4248575 | Rotary fluid pressure biased vane compressor with pressure release means A vane compressor includes a hollow stator, and a rotor which is received in the stator for rotation about an axis. The rotor is provided with a plurality of throughgoing passages which extend radially and outwardly relative to the axis. Each passage rece... | 02/03/1981 |
| 4242068 | Vane pump with bypass for leakage of fluid when bottom of vane is connected to undervane suction port The instant invention provides an improved vane for a vane pump which incorporates an extended undervane suction port. The vane has a restricted passage which connects the inner and outer ends of the vane and an unrestricted passage which connects the out... | 12/30/1980 |
| 4230088 | Rotary internal combustion engine with integrated supercharging A rotary internal combustion engine with four vanes carried by a rotor engaging an internal oval housing surface to define four chambers that orbit the rotor axis. Two of the chambers, diametrically opposed, are operated as working chambers on a four-phas... | 10/28/1980 |
| 4202313 | Rotary engine A rotary internal combustion engine having an ellipsoidal wall member which forms an ellipsoidal internal chamber. A drive shaft is rotatably mounted in the housing and extends transversely through the ellipsoidal chamber. A substantially cylindrical roto... | 05/13/1980 |
| 4174931 | Vane for rotary compressor A rotary compressor comprises a cylinder in which a rotor is eccentrically disposed. A plurality of generally rectangular, radially extending vanes are slidably disposed in slots in the rotor and sealingly engage the inner wall of the cylinder. Rotation o... | 11/20/1979 |
