Pumps – Condition responsive control of drive transmission or pump... – Adjustable cam or linkage
Patent
1998-08-13
2000-10-17
Freay, Charles G.
Pumps
Condition responsive control of drive transmission or pump...
Adjustable cam or linkage
92140, F04B 106
Patent
active
06132177&
ABSTRACT:
A two stage reciprocating compressor and associated HVAC systems and methods are disclosed. The reciprocating compressor includes a crankshaft having an eccentric crankpin, a reversible motor for rotating the crankshaft in a forward and a reverse direction, and an eccentric, two position cam rotatably mounted over the crankpin. The crankshaft and cam combine to cause the piston to have a first stroke when the motor operates in the forward direction and a second stroke when the motor operates in the reverse direction. The cam and crankpin also include stabilization means to restrict the relative rotation of the cam about the crankpin. A lubrication system is provided to lubricate the engaging surfaces of the crankshaft and cam and between the cam and the bearing surface of the connecting rod. There is also provided a control for selectively operating the motor either in the forward direction at a first power load or in the reverse direction at a reduced second power load. A protector for the motor is also provided. In addition, the application of the reciprocating compressor to both air conditioning and heat pump systems is disclosed.
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Hill Joe T
Loprete Joseph F.
Monk David T
Peters Robert B.
Pippin Larry
Bristol Compressors, Inc.
Freay Charles G.
Solak Timothy P
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