US4059370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary engine having low thermal conductivity rotor
Assignee: Caterpillar Inc
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Filing: 1976-06-25
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Granted: 1977-11-22
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Expires: 1996-06-25
Abstract
Abstract A rotary engine having a high surface to volume ratio including a housing having intake and exhaust ports and defining a chamber, a shaft journalled in the housing to extend therethrough and having an eccentric within the chamber, and a rotor on the eccentric within the chamber, the rotor having a body consisting essentially of a material having a low coefficient of thermal conductivity.
Inventors
- 👤 Myron R. Gibson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:56
CPC Classifications
F; F01; F01C; F01C19/00; F01C19/08; F01C21/00; F01C21/08; F02; F02B; F02B53/00; F02B53/10; F01C1/00; F01C1/22; F02B2053/005; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
104 words
In a rotary engine having a high surface to volume ratio, the combination of: a housing having intake and exhaust ports and defining a chamber; a shaft journalled in the housing to extend through the chamber and having an eccentric within the chamber; a rotor journalled on said eccentric within said chamber, said rotor having a body consisting essentially of a ceramic material; seals carried by said rotor sealingly engaging the walls of the chamber; and metallic, grooved inserts in said rotor body for receiving the seals in the groove thereof, means placing said insets in tension so that said body is in compression.
Claim 2
Dependent Claim
104 words
In a rotary engine having a high surface to volume ratio, the combination of: a housing having intake and exhaust ports and defining a chamber; a shaft journalled in the housing to extend through the chamber and having an eccentric within the chamber; a rotor journalled on said eccentric within said chamber, said rotor having a body consisting essentially of a ceramic material; seals carried by said rotor sealingly engaging the walls of the chamber; and metallic, grooved inserts in said rotor body for receiving the seals in the groove thereof, means placing said insets in tension so that said body is in compression.
Claim 3
Dependent Claim
11 words
The rotary engine of claim 1 wherein said inserts are interconnected.
Claim 4
Dependent Claim
117 words
In a rotary engine having a high surface to volume ratio, the combination of: a housing having intake and exhaust ports and defining a chamber; a shaft journalled in the housing to extend through the chamber and having an eccentric within the chamber; a rotor journalled on said eccentric within said chamber, said rotor haing a body consisting essentially of a ceramic material; portions of said body in near or partial contact with said housing having knurled surfaces; and seals carried by said rotor and sealingly engaging said housing metallic, grooved inserts in said rotor body for receiving the seals in the groove thereof, means placing said inserts in tension so that said body is in compression.
Claim 5
Dependent Claim
117 words
In a rotary engine having a high surface to volume ratio, the combination of: a housing having intake and exhaust ports and defining a chamber; a shaft journalled in the housing to extend through the chamber and having an eccentric within the chamber; a rotor journalled on said eccentric within said chamber, said rotor haing a body consisting essentially of a ceramic material; portions of said body in near or partial contact with said housing having knurled surfaces; and seals carried by said rotor and sealingly engaging said housing metallic, grooved inserts in said rotor body for receiving the seals in the groove thereof, means placing said inserts in tension so that said body is in compression.
References Cited (Backward Citations)
US974803A
Cited
US3081745A
Cited
US3307453A
Cited
US3601513A
Cited
US3749072A
Cited
DE2109139A1
Cited
US3822973A
Cited
US3802811A
Cited
DE2312263A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-11-21 | 1981-05-23 | 1981-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-21 | 1985-05-23 | 1985-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-21 | 1989-05-23 | 1989-11-22 | $7700.00 | Window Closed / Lapsed |