F - Mech Eng,Light,Heat,Weapons – 04 – B
Patent
F - Mech Eng,Light,Heat,Weapons
04
B
230/33
F04B 49/02 (2006.01) F04B 39/10 (2006.01)
Patent
CA 1313169
ABSTRACT A pressure relief valve for a hermetically sealed reciprocating piston compressor is disclosed in which a bore (50) in a compressor cylinder head (20) defines the valve body. Valve components are introduced into the bore through a valve opening on the bottom surface of the cylinder head. A discharge pressure chamber (34) in the cylinder head also has a discharge pressure opening on the bottom surface. A path is provided between the valve opening (86) and the discharge pressure opening (84), when the compressor is assembled, by means of a duct (78) in a valve plate interposed between the cylinder head (28) and a compressor crankcase (14). Also disclosed is a method for assembling the pressure relief valve in a cylinder head, whereby the valve components are temporarily retained within the bore by a washer-shaped soft metal valve seat (70) that is compressed and expanded into an annular undercut (108) or recess in the bore (50) located adjacent to the bottom surface (29) of the cylinder head (28). Upon final assembly of the cylinder head to the crankcase, the valve seat and other valve components are positively retained within the bore.
561674
Borden Ladner Gervais Llp
Tecumseh Products Company
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