In 1608, Dutch eyeglass maker Hans Lipperhey filed the first patent for a working telescope. The patent was denied.
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| Number | Title | Issue Date |
| 8011909 | Balanced variable displacement vane pump with floating face seals and biased vane seals A vane pump assembly including a cam ring having an elliptical inner bore defining a hydraulic pumping chamber, the pumping chamber having an interior camming surface. The cam ring defines ports for admitting fluid into the pumping chamber. A rotor, within the cam r... | 09/06/2011 |
| 7258535 | Sealing features for a pump and ink jet printer mounting the pump A pump is provided with a housing, a rotor, and a separating member. The housing is formed by connecting two housing members. A first housing member has a cylindrical wall and a bottom wall, and the other end of the cylindrical wall is open. A second housing member ... | 08/21/2007 |
| 7134855 | Vane pump with integrated shaft, rotor and disc A rotary vane suction pump that includes a housing that defines a pump chamber. A shaft is rotatably mounted to the housing. A rotor is fixed to the front end of the shaft to rotate in unison with the vanes. The vanes that form the fluid cavities, into which the flu... | 11/14/2006 |
| 7117841 | K.Engine K. Engine (KE) is rotary internal combustion engine, combination Reciprocating Engine (RE) and Gas Turbine (GT) comprising coaxially separate piston rotary compressor and turbine having housings with annular channels, outside combustion chambers (CH) unified with ro... | 10/10/2006 |
| 6457450 | Ju. M. Luzhkov rotary-turbine internal combustion engine A rotary-turbine internal combustion engine, having working members that make oscillatory movements about an axle fixed to a rotor using carriers that couple the working members and a guide on a body, makes it possible to provide good smoothness of rollin... | 10/01/2002 |
| 6273694 | Rotary-piston machine A rotary-piston machine (10) comprising a housing (5) having a cavity (9), a rotor (2) received in the housing (5), which rotor (2) having a rotor axis (A) and a peripheral surface (21), inlet and outlet passages (3, 4) in communication with said cavity (... | 08/14/2001 |
| 6106257 | Hydraulic power transmission system A hydraulic power transmission system including a stationary inner barrel connected between a hydraulic oil inlet pipe and a hydraulic oil return pipe and having a plurality of openings spaced around the periphery and a plurality of movable blocks moved i... | 08/22/2000 |
| 5141423 | Axial flow fluid compressor with oil supply passage through rotor A compressor having a cylinder and a cylindrical rotational body housed within the cylinder. A spiral groove is formed in the outer peripheral surface of the rotational body, and a spiral blade is fitted in the groove so as to be freely retreated in and p... | 08/25/1992 |
| 4898524 | Fluid driven rotary motor An improved, fluid driven rotary motor of the vane type includes a housing having a rotor cover disposed between a pair of end plates, a rotor rotatably mounted in the housing and a drive shaft torsionally affixed to the rotor. In the improved rotary moto... | 02/06/1990 |
| 4657491 | Blade sealing for impeller pumps A sealing for a rotary impeller blade partially extending outwardly from a rotor of an impeller pump includes two sealing strips of plastics, the ends of which abut against the opposing side faces of the blade in the region of a slot found in the rotor, a... | 04/14/1987 |
| 4618319 | Vane-type compressor having resilient slot seals In a vane-type compressor, the slotted rotor includes resilient slot sealing means in the form of leaf springs. Each spring extends between consecutive slots and has curved end portions projecting into the slots and sealingly engaging opposite sides of co... | 10/21/1986 |
| 4548559 | Rotary unit A rotary piston displacing machine for use as a pump compressor or power engine, as well as a hydrostatic coupling. The machine has a disk-shaped rotor rotatable in a housing, several similar diametrically opposed rotary vanes which penetrate the annular ... | 10/22/1985 |
| 4529366 | Vane type compressor with elastic sealings In a vane type compressor including a plurality of radial vanes extending from a compressor shaft through the slots in a rotary piston elastic flexible tubes are inserted in the slots and interconnected between the respective vanes and the rotary piston, ... | 07/16/1985 |
| 4432555 | Centrifugal seal with deformable frustoconical sealing ring An arrangement for effecting a seal between components 10,12 that rotate together and between which relative radial movement is tolerated while maintaining the seal. A conical, or Belleville, sealing ring 25 is located between the components 10,12 and mea... | 02/21/1984 |
| 4201526 | Pivoted blade between rotor and stator having arcuate sections An improved rotor blade arrangement pivotally mounted in a cylindrical recess in the rotor. The blade arrangement is pivotally mounted on a blade support and has a center of gravity offset from the pivot mounting. The arrangement includes a pair of arcuat... | 05/06/1980 |
| 4097205 | Orbital pump with inlet and outlet through the rotor An orbital pump or the like comprises a housing having first and second end walls and intermediate, axially spaced first and second annular, inwardly projecting wall members. First and second axial drive shaft portions are installed through the housing fi... | 06/27/1978 |
| 3955540 | Rotary internal combustion engine A rotary internal combustion engine which includes a housing having a cylindrical inner peripheral wall surface, a hollow, cylindrical rotor rotatably shaft-mounted in the housing in eccentric relationship with respect to the housing, a cylindrical vane t... | 05/11/1976 |