High pressure compressor cut-off switch

Claim 2

A combination pressure relief valve and disconnect switch adapted for use with an air conditioning compressor which is activated by the energization of an electromagnetic clutch comprising: a valve housing enclosing an interior space and having a relief passage extending therefrom for connection to the outlet portion of the compressor; a valve seat formed around the end of the relief passage; valve means within said interior space normally engaging said valve seat to prevent fluid flow therebetween when the fluid pressure in the compressor outlet is below a predetermined level and being movable away from said valve seat in response to said predetermined fluid pressure to discharge excess pressurized fluid into said interior space; a generally cup-shaped connector member having a hollow interior and an open end; said open end having turned-in edge means engaging said valve housing and sealingly enclosing said connector interior; said valve housing having a fluid relief passage connecting the interiors of said housing and said connector; a clutch terminal member normally held in electrical contact with said housing by said connector member to close a clutch energization circuit whereby pressurization of said connector interior by opening of the valve causes separation of the inturned edge and said valve housing and opening of said clutch circuit by the resultant disconnection of said terminal member and said valve housing.

Claim 3

A combination pressure relief valve and disconnect switch adapted for use with an air conditioning compressor which is activated by the energization of an electromagnetic clutch comprising: a valve housing enclosing an interior space and having a relief passage extending therefrom for connection to the outlet portion of the compressor; a valve seat formed around the end of the relief passage; valve means within said interior space normally engaging said valve seat to prevent fluid flow therebetween when the fluid pressure in the compressor outlet is below a predetermined level and being movable away from said valve seat in response to said predetermined fluid pressure to discharge excess pressurized fluid into said interior space; a generally cup-shaped connector member having a hollow interior and an open end; said connector member having an inwardly directed edge portion encircling said open end; said valve housing having a groove therein adapted to be engaged by said edge portion of said connector to connect said valve housing and connector member and sealingly enclose said connector interior; said valve housing having a fluid relief passage connecting the interiors of said housing and said connector; a clutch terminal member normally held in electrical contact with said housing by said connector member to close a clutch energization circuit whereby pressurization of said connector interior by opening of the valve causes separation of the inturned edge and said valve housing and opening of said clutch circuit by the resultant disconnection of said terminal member and said valve housing.

Claim 4

A combination pressure relief valve and disconnect switch adapted for use with an air conditioning compressor which is activated by the energization of an electromagnetic clutch comprising: a valve housing enclosing an interior space and having a relief passage extending therefrom for connection to the outlet portion of the compressor; a valve seat formed around the end of the relief passage; valve means within said interior space normally engaging said valve seat to prevent fluid flow therebetween when the fluid pressure in the compressor outlet is below a predetermined level and being movable away from said valve seat in response to said predetermined fluid pressure to discharge excess pressurized fluid into said interior space; a generally cup-shaped connector member having a hollow interior and an open end; said connector member having an inwardly directed edge portion encircling said open end; said valve housing having a groove therein adapted to be engaged by said edge portion of said connector to connect said valve housing and connector member and sealingly enclose said connector interior; said valve housing having a fluid relief passage connecting the interiors of said housing and said connector; a clutch terminal member normally held in electrical contact with said housing by said connector member to close a clutch energization circuit whereby pressurization of said connector interior by opening of the valve causes separation of the inturned edge and said valve housing and opening of said clutch circuit by the resultant disconnection of said terminal member and said valve housing.