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US 5,476,371 AGranted
Compressor suction valve of toroidal shape with a radial finger
AssigneeTecumseh Products Company
InventorNelik I. Dreiman
Life of this patent
Estimating the term…
Abstract
A compressor assembly is disclosed including a compressor mechanism mounted within a hermetically sealed housing. A cylinder block contains a reciprocating piston having a suction valve assembly. The piston includes a head with a deep semitorus shaped annular groove with a similarly shaped solid suction valve that seats thereto. A retaining mechanism including a clamping bolt with a plurality of radially extending fingers is used to reduce valve inertia and impact forces. The fingers behave as cantilevered beam springs.
Claims28
A compressor comprising:
- a housing;
- a cylinder block having a bore, said cylinder block disposed within said housing;
- a cylinder head assembly defining a discharge port, said cylinder head assembly attached over said bore;
- a discharge valve mounted to said cylinder head assembly over said discharge port;
- a piston disposed within said bore for reciprocation therein, said piston including a front surface having an annular depression therein, a rear surface, and a suction port extending through said piston from said rear surface to said front surface, said suction port at substantially suction pressure;
- a drive mechanism for reciprocating said piston within said bore;
- and
- a suction valve slidably attached to said piston over said suction port and said front surface, said suction valve having a top surface and a bottom surface, said bottom surface being toroidally shaped whereby during valve opening, said bottom surface is immediately fully exposed to suction pressure.
5 more elements
A compressor comprising:
- a housing;
- a cylinder block having a bore, said cylinder block disposed within said housing;
- a cylinder head assembly defining a discharge port, said cylinder head assembly attached over said bore;
- a discharge valve mounted to said cylinder head assembly over said discharge port;
- a piston disposed within said bore for reciprocating motion, said piston having a front surface, a rear surface, and a suction port extending through said piston from said rear surface to said front surface, said suction port at substantially suction pressure;
- a drive mechanism for reciprocating said piston within said bore;
- a suction valve having a top surface and a bottom surface;
- and
- a clamping bolt attached to said piston,said clamping bolt including a radial finger, said suction valve slidable along said clamping bolt to open and closed positions, said suction valve sealing said suction port when in said closed position, said radial finger in contact with said top surface when said suction valve is in said open position so that said radial finger reduces opening stress on said suction valve.
6 more elements
A compressor comprising:
- a housing;
- a cylinder block having a bore, said cylinder block disposed within said housing;
- a discharge valve mounted to said cylinder head assembly over said discharge port;
- a piston disposed within said bore for reciprocating motion, said piston including a front surface having an annular depression therein, a rear surface, and a suction port extending through said piston from said rear surface to said front surface, said suction port at substantially suction pressure;
- a drive mechanism for reciprocating said piston within said bore;
- a polymeric suction valve slidably attached to said piston over said suction port and said front surface, said suction valve having a top surface and a bottom surface, said bottom surface toroidally shaped;
- and
- a clamping bolt attached to said piston, said clamping bolt including a radial finger, said suction valve slidable along said clamping bolt to open and closed positions, said suction valve sealing said suction port when in said closed position, said radial finger in contact with said top surface when said suction valve is in said open position, whereby said radial finger reduces opening stress on said suction valve.
5 more elements
Dependencies are inferred from the claim text.