Patent US3802811A successfully refreshed from Google Patents.
US3802811A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotor for rotary combustion engines
Assignee: Individual
•
Filing: 1973-03-07
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Granted: 1974-04-09
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Expires: 1993-03-07
Abstract
Abstract This invention refers to a multi-apex rotor for rotary combustion engines of the trochoidal type which rotor carries at its apexes radially movable sealing strips arranged in radial grooves in the rotor apexes; and at its end faces axially movable sealing strips which are arranged in grooves in the rotor endfaces, the sealing cooperation between the radial and the axial sealing strips being obtained by sealing pins which are axially movably arranged in the rotor end faces.
Inventors
- 👤 J Steinwart
- 👤 M Ruf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:58
CPC Classifications
F; F01; F01C; F01C19/00; F01C19/10; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49231; Y10T29/49234
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
153 words
A multi-apex rotor for rotary combustion engines of the trochoidal type, having at its apexes radial grooves for accommodating radially movable sealing strips, and having at its endfaces axial grooves for accommodating axially movable sealing strips as well as axial bores for accommodating sealing pins that form a sealing interconnection between the axial and radial sealing strips, comprises a prefabricated grooved armour having radial and axial anchoring means and made of a wear-resistant material in each rotor apex, said armour extending over substantially the whole axial width of the rotor and having at each of its axial ends a bore for accommodating a sealing pin, the wall of each bore being provided with recesses which are in continuation of the grooves in the rotor endface for accommodating the axial sealing strips, said recesses being open towards the adjacent rotor endface and having a cross-sectional area larger than said grooves in the rotor endface.
Claim 2
Dependent Claim
153 words
A multi-apex rotor for rotary combustion engines of the trochoidal type, having at its apexes radial grooves for accommodating radially movable sealing strips, and having at its endfaces axial grooves for accommodating axially movable sealing strips as well as axial bores for accommodating sealing pins that form a sealing interconnection between the axial and radial sealing strips, comprises a prefabricated grooved armour having radial and axial anchoring means and made of a wear-resistant material in each rotor apex, said armour extending over substantially the whole axial width of the rotor and having at each of its axial ends a bore for accommodating a sealing pin, the wall of each bore being provided with recesses which are in continuation of the grooves in the rotor endface for accommodating the axial sealing strips, said recesses being open towards the adjacent rotor endface and having a cross-sectional area larger than said grooves in the rotor endface.
Claim 3
Dependent Claim
16 words
A rotor according to claim 1, wherein the prefabricated armour is manufactured as a precision casting.
Claim 4
Dependent Claim
24 words
A rotor according to claim 1, wherein the prefabricated armour is manufactured as a continuous casting, the axial anchoring means being provided after casting.
Claim 5
Dependent Claim
13 words
A rotor according to claim 1 wherein the armour is manufactured by sintering.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-08 | 1977-10-08 | 1978-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-08 | 1981-10-08 | 1982-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-08 | 1985-10-08 | 1986-04-09 | $7700.00 | Window Closed / Lapsed |