Power plants – Pressure fluid source and motor – Pulsator
Patent
1998-12-24
2000-05-23
Nguyen, Hoang
Power plants
Pressure fluid source and motor
Pulsator
913692, 913693, 91376R, B60T 1300, F15B 910
Patent
active
060652918
ABSTRACT:
A pressure generator includes a housing in which is formed at least one pressure chamber, and a power piston disposed inside the housing for advancing and retreating movement with respect to the housing. A moving wall divides the pressure chamber into a front chamber connected to a vacuum source and a rear chamber selectively connected to the vacuum source and the atmosphere, and a valve housing is attached to the moving wall. A valve mechanism disposed inside the valve housing has a vacuum valve for connecting the rear chamber with the front chamber. The valve mechanism also has an atmospheric air valve for connecting the rear chamber with the atmosphere. An output member outputs a thrust force accompanying movement of the moveable wall, and a cylinder body is provided which has a cylinder bore and which is mounted on the front part of the housing. A piston is located in the cylinder bore for advancing and retreating movement. The piston forms a pressure chamber in front of the piston and extends into the housing and is engageable with the output member. An auxiliary movable wall is located in the front chamber for advancing and retreating movement, with the auxiliary movable wall being engageable with the piston. An isolating member forms an auxiliary variable pressure chamber behind the auxiliary moving wall, and a switching device selectively connects the auxiliary variable pressure chamber with the vacuum source or the atmosphere.
REFERENCES:
patent: 5275265 (1994-01-01), Castel
patent: 5845558 (1998-12-01), Tsbouchi et al.
patent: 5890775 (1999-04-01), Tsubouchi et al.
Aisin Seiki Kabushiki Kaisha
Nguyen Hoang
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