Patent US3548225A successfully refreshed from Google Patents.
Patent US3782866A successfully refreshed from Google Patents.
US3782866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary fluid pressure device
Assignee: Individual
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Filing: 1972-05-30
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Granted: 1974-01-01
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Expires: 1992-05-30
Abstract
Abstract A rotary fluid pressure positive displacement mechanism operative selectively as a fluid pump or motor and including a relatively stationary internally toothed member and a relatively rotary externally toothed rotor having one tooth less than the internally toothed member and in meshing engagement therewith. The rotor partakes of rotary and orbital movement within the internally toothed member with the axis of the rotor describing an orbit around the axis of the internally toothed member. A drive shaft is journalled for rotation on the axis of the internally toothed member and is operatively connected to the rotor.
Inventors
- 👤 H Mcdermott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:04
CPC Classifications
F; F01; F01C; F01C21/00; F01C21/008; F16; F16D; F16D3/00; F16D3/16; F16D3/18; F16D3/185
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
185 words
In a rotary fluid pressure device comprising, a casing including an internally toothed relatively stationary gear, a cooperating externally toothed gear having at least one less tooth than said internally toothed gear and disposed therein for intermeshing engagement therewith and for rotary and orbital movement wherein the axis of said externally toothed gear describes an orbit around the axis of the internally toothed gear, said externally toothed gear having an axial opening therethrough, and a drive shaft journalled in said casing on the axis of said internally toothed gear; the improvement comprising, a gear shaft rigidly mounted in said axial opening and extending axially from said externally toothed gear for rotary and orbital movement in common therewith, an enlarged head on said gear shaft axially spaced from said externally toothed gear, an enlarged inner head on said drive shaft, and a connector element having an axis disposed oblique to the axes of said gear shaft and drive shaft, said enlarged heads and connector element having intermeshing gear teeth of a diameter substantially greater than the diameter of said axial opening in the externally toothed gear.
Claim 2
Dependent Claim
185 words
In a rotary fluid pressure device comprising, a casing including an internally toothed relatively stationary gear, a cooperating externally toothed gear having at least one less tooth than said internally toothed gear and disposed therein for intermeshing engagement therewith and for rotary and orbital movement wherein the axis of said externally toothed gear describes an orbit around the axis of the internally toothed gear, said externally toothed gear having an axial opening therethrough, and a drive shaft journalled in said casing on the axis of said internally toothed gear; the improvement comprising, a gear shaft rigidly mounted in said axial opening and extending axially from said externally toothed gear for rotary and orbital movement in common therewith, an enlarged head on said gear shaft axially spaced from said externally toothed gear, an enlarged inner head on said drive shaft, and a connector element having an axis disposed oblique to the axes of said gear shaft and drive shaft, said enlarged heads and connector element having intermeshing gear teeth of a diameter substantially greater than the diameter of said axial opening in the externally toothed gear.
Claim 3
Dependent Claim
55 words
The rotary fluid pressure device defined in claim 1 in which said axial opening defines a plurality of circumferentially spaced spline teeth, said gear shaft having spline teeth interfitting the teeth in said axial opening, the intermeshing teeth on said heads and connector element having substantially greater circumferential and radial measurement than said spline teeth.
Claim 4
Dependent Claim
46 words
The rotary fluid pressure device defined in claim 2 in which said enlarged heads on the gear and drive shafts define axial recesses, the teeth of said enlarged heads comprising internal gear teeth in said recesses, the teeth on said connector element being external gear teeth.
Claim 5
Dependent Claim
55 words
The rotary fluid pressure device defined in claim 2 in which the teeth on said enlarged gear shaft and drive shaft heads comprise external gear teeth, said connector element comprising a tube having an inner surface, the teeth of said connector element being internal gear teeth defining at least a portion of said inner surface.
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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |