Oil cooled piston rings
Patent 4026197 Issued on May 31, 1977. Estimated Expiration Date: 
May 31, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 31, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 522459 2386117 2554234 2832618 3204617 3272092 3296943 3761102 3843138 InventorsAssigneeApplicationNo. 05/583239 filed on 06/02/1975US Classes:92/186, With ported chamber in piston part for circulating heat exchange fluid277/449Particular piston seatExaminersPrimary: Cohen, Irwin C.Attorney, Agent or FirmAbstractAn improved reciprocating engine wherein the pistons are provided with hollow compression rings having a fluid inlet and a fluid outlet and an elongated fluid flow path extending therebetween. A path is established through various parts of the engine including the piston for directing a coolant, usually oil, through the inlet to the interior of the piston ring to cool the ring during engine operation. | |
