US3575538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Housing sealing means for rotary engines
Assignee: John Deere Technologies International Inc
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Filing: 1969-07-24
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Granted: 1971-04-20
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Expires: 1989-07-24
Abstract
Abstract A means of sealing an engine housing against coolant leakage, by positioning a gasket ring with a small retainer ring lodged against a housing shoulder, thus obviating the former heavy wall thickness required for seating a gasket in a groove in the edge thereof, and thereby resulting in reduced fabrication costs and improved cooling by the use of thinner wall.
Inventors
- 👤 Murray Berkowitz
- 👤 Charles Lombaerde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:53
CPC Classifications
F; F01; F01C; F01C21/00; F01C21/06; F02; F02B; F02B55/00; F02B55/02; F02B55/04; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
165 words
In a rotary internal combustion engine having a pair of end walls having coolant passages therein, the end walls being spaced apart by a peripheral housing having double circumferential walls spaced apart by ribs defining coolant passages therethrough in communication with the coolant passages of the end walls, the improvement comprising: a. at least one of the peripheral housing walls having a circumferential shoulder at each of its edges on the side adjacent to the coolant passages, and a circumferential slot in the edges of the ribs adjacent to each shoulder, b. a retaining ring disposed in each of the slots and defining an annular gasket chamber with its adjacent shoulder and adjacent end wall, c. an elastomeric gasket disposed in each gasket chamber, d. the retaining ring having clearance in its slot providing communication between the coolant passages and the gasket chamber to allow pressurized coolant to apply pressure to the gasket and to prevent direct heat transfer from the wall to the ring.
Claim 2
Dependent Claim
165 words
In a rotary internal combustion engine having a pair of end walls having coolant passages therein, the end walls being spaced apart by a peripheral housing having double circumferential walls spaced apart by ribs defining coolant passages therethrough in communication with the coolant passages of the end walls, the improvement comprising: a. at least one of the peripheral housing walls having a circumferential shoulder at each of its edges on the side adjacent to the coolant passages, and a circumferential slot in the edges of the ribs adjacent to each shoulder, b. a retaining ring disposed in each of the slots and defining an annular gasket chamber with its adjacent shoulder and adjacent end wall, c. an elastomeric gasket disposed in each gasket chamber, d. the retaining ring having clearance in its slot providing communication between the coolant passages and the gasket chamber to allow pressurized coolant to apply pressure to the gasket and to prevent direct heat transfer from the wall to the ring.
Claim 3
Dependent Claim
56 words
The combination recited in claim 1, wherein the gasket chamber has a substantially triangular cross section and the gasket has a substantially circular cross section in the relaxed state with a diameter in the relaxed state greater than can be accommodated within the gasket chamber, the gasket being deformed into the chamber by the walls thereof.
Claim 4
Dependent Claim
22 words
The combination recited in claim 2, wherein the hypotenuse of the triangular chamber is formEd by a chamfer on the retaining ring.
Claim 5
Dependent Claim
26 words
The combination recited in claim 3, wherein the corners of the retaining ring at the bottom of its slot are chamfered to provide coolant circulation therearound.
Claim 6
Dependent Claim
54 words
The combination recited in claim 1, wherein the gasket chamber has a rectangular cross section and the gasket has a substantially circular cross section in the relaxed state with a diameter in the relaxed state greater than the depth of the gasket chamber, the gasket being deformed into the chamber by the walls thereof.
Claim 7
Dependent Claim
26 words
The combination recited in claim 5, wherein the corners of the retaining ring at the bottom of its slot are chamfered to provide coolant circulation therearound.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |