F - Mech Eng,Light,Heat,Weapons – 04 – B
Patent
F - Mech Eng,Light,Heat,Weapons
04
B
F04B 49/12 (2006.01) F04B 39/00 (2006.01)
Patent
CA 2401923
A reversible reciprocating piston compressor includes a crankcase defining at least one cylinder therein and a crankshaft rotatably supported by the crankcase. The crankshaft includes a drive portion and a crankpin eccentrically positioned relative to an axis of rotation of the crankshaft. A piston is reciprocable within the cylinder and a connecting rod assembly is provided between the crankpin and the piston to reciprocally drive the piston in response to forward or reverse rotation of the crankshaft. A cam assembly is operably connected to the crankpin and is engageable with the drive member to effectuate a first stroke length in a first direction of rotation of the crankshaft and a second stroke in a second direction of rotation of the crankshaft. The cam assembly includes a cam, a driven portion and a counterweight. The cam is interposed between the connecting rod assembly and the crankpin and the driven portion is attached to the cam and is in a contacting relationship with the drive portion through at least one contact interface. The contact interface is oriented at a non-zero angle to a radial reference originating from a centerline axis of the crankpin. The counterweight is attached to the cam and has a center of mass located radially adjacent to or through the contact interface. The drive portion is engageable and disengageable with the driven portion through sliding movement of the drive portion relative to the driven portion along the contact interface.
Manole Dan M.
Robbins Elizabeth A.
Ridout & Maybee Llp
Tecumseh Products Company
LandOfFree
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