US3705619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing a toothed ring for an internal-shaft meshing rotary piston engine
Assignee: Danfoss AS
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Filing: 1971-02-16
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Granted: 1972-12-12
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Expires: 1991-02-16
Abstract
Abstract A method and apparatus for producing the ring member of a gerotor gear set. Ring members are first formed roughly to size by broaching a stack of blanks. The honing of the crests and flanks of the teeth is done with a honing mandrel having tapered cross section with the same shape as the star member of a gerotor gear set. The honing mandrel is reciprocated and at the same time is given rotational and orbital movements which correspond to the movements of the same character which occur in the operation of a gerotor gear set wherein the star member may have both rotational and orbital movement relative to the ring member of the gear set.
Inventors
- 👤 Svend Holm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:53
CPC Classifications
B; B24; B24D; B24D99/00; B23; B23F; B23F15/00; B23F15/08; B23Q; B23Q27/00; B23Q27/006; B24B; B24B19/00; B24B19/08; B24B33/00; B24B33/05; B24B5/00; B24B5/01
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
78 words
A method of producing a gerotor ring member so that the crest and flank portions of the teeth thereof are accurately formed, comprising the steps of roughly forming said member by any means, providing rotational and orbital movements for said member, providing a honing mandrel having the same shape as a gerotor star member, and honing the teeth of said member by reciprocating said mandrel in an axial direction and in synchronism with said rotational and orbital movements.
Claim 2
Independent Claim
78 words
A method of producing a gerotor ring member so that the crest and flank portions of the teeth thereof are accurately formed, comprising the steps of roughly forming said member by any means, providing rotational and orbital movements for said member, providing a honing mandrel having the same shape as a gerotor star member, and honing the teeth of said member by reciprocating said mandrel in an axial direction and in synchronism with said rotational and orbital movements.
Claim 3
Dependent Claim
23 words
A method according to claim 1 wherein said step of roughly forming said member is performed by broaching a stack of said members.
Claim 4
Dependent Claim
23 words
A method according to claim 1 wherein said honing is performed only on the crests and flanks of the teeth of said member.
Claim 5
Dependent Claim
21 words
A method according to claim 1 wherein said honing step is performed by radially and axially displaceable stones on said mandrel.
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) | 1975-12-12 | 1976-06-12 | 1976-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-12 | 1980-06-12 | 1980-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-12 | 1984-06-12 | 1984-12-12 | $7700.00 | Window Closed / Lapsed |