US3668947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gearwheel machine
Assignee: Danfoss AS
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Filing: 1970-10-02
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Granted: 1972-06-13
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Expires: 1990-10-02
Abstract
Abstract The invention relates to a gerotor mechanism of the type having an internally toothed ring member which surrounds an eccentrically displaced, externally toothed wheel member having one less teeth. The teeth of the ring member have the form of rollers which is old but the pitch circle of the ring member has a particular diameter relative to a circle which is tangent to the rollers so that in operation the rollers are caused to rotate continuously in one direction only.
Inventors
- 👤 Jorgen Frederik Waldorff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:08
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/08; F04C2/10; F04C2/103; Y; Y10; Y10S; Y10S475/00; Y10S475/904
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
81 words
A gerotor comprising an externally toothed wheel and an internally toothed ring member eccentrically disposed relative to said wheel and having one tooth more than said wheel, said ring member having pockets formed with cylindrical surface portions, cylindrically shaped rollers rotatably disposed in said pockets, said rollers forming the teeth of said ring member, said ring member having a pitch circle W1 which is at most equal to a circle T which is tangent to said teeth of said ring member.
Claim 2
Dependent Claim
81 words
A gerotor comprising an externally toothed wheel and an internally toothed ring member eccentrically disposed relative to said wheel and having one tooth more than said wheel, said ring member having pockets formed with cylindrical surface portions, cylindrically shaped rollers rotatably disposed in said pockets, said rollers forming the teeth of said ring member, said ring member having a pitch circle W1 which is at most equal to a circle T which is tangent to said teeth of said ring member.
Claim 3
Dependent Claim
44 words
A gerotor according to claim 1 wherein the eccentricity e between said wheel and said ring member relative to an eccentricity eo which occurs when said circle W1 equals said circle T satisfies the condition: eo/1.20 < or = e < or = eo/1.04
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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |