Quotables
"That’s an amazing invention, but who would ever want to use one of them?"
President Rutherford B. Hayes ; Said in 1876, after Alexander Graham Bell demonstrated the telephone to him at the White House
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 |
| 7168257 | Rotary compressor, method for manufacturing the same, and defroster for refrigerant circuit An object of the present invention is to provide a method for manufacturing a multi-stage compression type rotary compressor which can avoid the replacement of parts to be used as much as possible to reduce costs and also which enables easily setting an appropriate ... | 01/30/2007 |
| 7121817 | Scroll fluid machine comprising compressing and expanding sections A scroll fluid machine comprises an orbiting scroll and front and rear stationary scrolls. The orbiting scroll is driven by a driving shaft via an eccentric portion and has front and rear orbiting scroll wraps. The front and rear stationary scroll have front and rea... | 10/17/2006 |
| 7048525 | Flow divider A flow divider for use with fluent materials, such as raw sausage. The flow divider is a combination of at least two housing bodies with chambers defined by elliptical cylindrical sidewalls. Hubs with transverse vanes have necked-down regions at one end that are rot... | 05/23/2006 |
| 6931866 | Multistage compression type rotary compressor and cooling device A multi-stage compression type rotary compressor, having a driving element and a first and a second rotary compression element that are driven by the driving element in a sealed container, is provided. The refrigerant compressed by the first rotary compression eleme... | 08/23/2005 |
| 6478559 | Balanced vane pump A balanced rotary vane pump for a motor vehicle power steering system includes a rotor having fifteen vanes disposed in a three lobe cam ring. Three inlet ports and three outlet ports disposed in equally spaced pairs provide fluid communication to the thr... | 11/12/2002 |
| 6390794 | Rotary piston assembly A rotary piston assembly including a piston housing with a central axis, and an annular chamber defined about the central axis. A pair of pistons are disposed about 180 degrees apart from one another within the annular chamber and rotate about the central... | 05/21/2002 |
| 5704774 | Pump with twin cylindrical impellers A pump which is easy to manufacture and which has a high efficiency and low vibration includes a pair of identical circular-shaped impellers which are respectively eccentrially and rotatably connected to respective parallel shafts so as to rotate opposite... | 01/06/1998 |
| 5597295 | Multi-chamber rotary fluid machine with at least two ring members carrying vanes A multiple rotary fluid machine which includes a stator and a plurality of coaxial rotors held together, sealing vanes and fluid ports which are all offset alternately in the radial plane and form a multiplicity of rotary fluid machines or stages which ar... | 01/28/1997 |
| 5375985 | Multi-chamber rotary fluid machine having at least two vane carrying ring members A multiple rotary fluid machine which includes a stator and a plurality of coaxial rotors held together, sealing vanes and fluid ports which are all offset alternately in the radial plane and form a multiplicity of rotary fluid machines or stages which ar... | 12/27/1994 |
| 5004409 | Displacement machine A prime mover or pump comprising of a first stationary plate and a second plate arranged parallel to the stationary plate and spaced therefrom. The second plate is rotatably mounted about its central axis. A plurality of elongated wall elements are dispos... | 04/02/1991 |
| 4484871 | Torque delivering tool with dual motor drive A pneumatic power tool for tightening screw joints includes a primary motor 11 for the high speed running down sequence and a secondary motor 12 for the high torque final tightening sequence. The tool includes a coupling gearing 18 providing a high ratio ... | 11/27/1984 |
| 4173439 | Apparatus having expanding and contracting chamber An apparatus having at least one alternately expanding and contracting chamber comprises a plurality of cylindrical rollers each having an exterior surface in continuous rolling engagement with two adjacent rollers, the rollers being rotatable along paral... | 11/06/1979 |
| 4139336 | Expansible chamber apparatus with pairs of cylindrical rollers An apparatus having an alternately expanding and contracting chamber comprises at least one pair of cylindrical rollers each having an exterior surface in continuous rolling engagement with the surface of the other roller of the pair, the rollers being ro... | 02/13/1979 |
| 3930763 | Rotary cell pump for the conveying of sausage stuffing and the like A rotary cell pump is provided for the conveying of sausage stuffing and the like. The pump has a stationary hub and a stator surrounding the hub in concentric relation therewith and an eccentric rotor. The rotor divides the pump into an inner pumping cha... | 01/06/1976 |
