Oil distribution system

Claim 1

In a machine frame incorporating a cylinder disposed to accommodate a reciprocable piston therewithin, an oil distribution system for dispersing incident cylinder heat throughout the cylinder, comprising: a cylinder liner; a cylinder jacket enveloping said liner and fixed to the frame; said liner and jacket having means cooperatively defining at least one chamber therebetween; an oil reservoir within said frame; and given means wholly confined and fixed within said frame for conducting oil from said reservoir into said one chamber; wherein said given oil conducting means includes an oil pump, mounted within said frame, operatively interposed between said one chamber and said reservoir for supplying reservoir oil under pressure to said one chamber; said liner and jacket have means cooperative to define a plurality of chambers therebetween, and a cylinder inlet passageway opening at one end thereof on one chamber of said plurality of chambers; said given oil conducting means further includes means interposed between said cylinder inlet passageway and said pump, for communicating, and for interrupting a communication between, the other end of said cylinder inlet passageway and said pump; said communication/interrupting means includes valving means, mounted within said frame, normally operative to interrupt said communication; said valving means being operative in response to a predetermined oil pressure conducted thereto by said pump to accommodate communication between said other end and said pump to admit oil to said one chamber; and said chambers-defining means comprises a partitioning rib integral with said jacket and projecting therefrom in contacting engagement with said liner, said partitioning rib cooperating with liner and jacket surfaces to define separate chambers to opposite sides thereof.