Pumps – Condition responsive control of drive transmission or pump... – Adjustable cam or linkage
Patent
1989-01-11
1990-07-10
Smith, Leonard E.
Pumps
Condition responsive control of drive transmission or pump...
Adjustable cam or linkage
F04B 128
Patent
active
049403931
ABSTRACT:
A slant plate type compressor with a variable displacement mechanism is disclosed. The compressor includes a housing having a cylinder block provided with a plurality of cylinders and a crank chamber. A piston is slidably fitted within each cylinder and is reciprocated by a drive mechanism including a slant plate having a surface with an adjustable inclined angle. The inclined angle is controlled by the pressure within the crank chamber to control the capacity of the compressor. The pressure in the crank chamber is further controlled by a control mechanism which includes two passageways linking the crank chamber with the suction chamber, each passageway having a valve control device to control the opening and closing of the passageway. The first valve control device controls the first passageway in response to the suction chamber pressure at a third control point. The second valve control device controls the second passageway in response to the suction chamber pressure at a first control point and at a second control point such that the passageway is open when the pressure exceeds the second control point and the passageway is closed when the suction pressure is below the first control point. The first control point is less than the third control point which is less than the second control point. The second valve control device includes a deformable plate hysterically responsive to the suction chamber pressure to switch between two shapes to control the link.
REFERENCES:
patent: 4747753 (1988-05-01), Taguchi
patent: 4778348 (1988-10-01), Kikuchi et al.
patent: 4780059 (1988-10-01), Taguchi
patent: 4780060 (1988-10-01), Terauchi
patent: 4842488 (1989-06-01), Terauchi
Sanden Corp.
Smith Leonard E.
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