Pumps – Inertia-type pumping member or drive means
Reexamination Certificate
2005-10-11
2005-10-11
Freay, Charles G. (Department: 3746)
Pumps
Inertia-type pumping member or drive means
C417S315000
Reexamination Certificate
active
06953324
ABSTRACT:
A stabilizing structure for a throw adjusting eccentric cam in a two-stage reciprocating compressor is provided. The compressor includes a block that has at least one cylinder with an associated compression chamber and piston, a crankshaft that includes an eccentric crankpin, and a reversible motor for rotating the crankshaft in a forward and a reverse direction. An eccentric, two position cam is rotatably mounted over the crankpin. The cam rotates to and operates at a first position relative to said crankpin when the motor is running in the forward direction and rotates to and operates at a second position relative to said crankpin when the motor is running in the reverse direction. The combined eccentricities of the crankpin and the cam 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. There is also provided a control for selectively operating the motor either in the forward direction or in the reverse direction.
Hill Joe T.
Loprete Joseph F.
Monk David T.
Peters Robert B.
Wagner Philip C.
Bristol Compressors, Inc.
Freay Charles G.
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