Patent EP0257916A1 successfully refreshed from Google Patents.
Patent EP0304990A2 successfully refreshed from Google Patents.
US3979167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal gear set having roller teeth
Assignee: Individual
•
Filing: 1975-01-27
•
Granted: 1976-09-07
•
Expires: 1995-01-27
Abstract
Abstract Internal gear set comparable to a geroter gear set except that all teeth are provided by rollers positioned in slightly oversize pockets. The internal gear set may have two, three or more gear members to provide, respectively, one, two or more sets of expanding and collapsing chambers and may be used as a hydraulic motor, pump and/or speed reducer.
Inventors
- 👤 Leslie H. Grove
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:56
CPC Classifications
F; F01; F01C; F01C1/00; F01C1/08; F01C1/10; F01C1/113
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
174 words
An internal gear set comprising first and second gear members, the first gear member having n identical cylindrical rollers in slightly oversize semi-cylindrical pockets formed in its radially outer face and equally spaced along a circle, the center of which is the axis of the first gear member, and the second gear member having n + 1 identical cylindrical rollers in slightly oversize semi-cylindrical pockets formed in its radially inner face and equally spaced along a circle having the axis of the second gear member as its center, n being an integer greater than 2, the first gear member nesting within and axially offset from the second gear member to provide expanding and collapsing chambers between the gear members upon rotation of one gear member relative to the other, each roller being free to move radially except to the extent that such movement may be restricted by its pocket and by rollers of the other gear member, and the diameter of each roller exceeding the spacing between adjacent rollers of the other gear member.
Claim 2
Dependent Claim
174 words
An internal gear set comprising first and second gear members, the first gear member having n identical cylindrical rollers in slightly oversize semi-cylindrical pockets formed in its radially outer face and equally spaced along a circle, the center of which is the axis of the first gear member, and the second gear member having n + 1 identical cylindrical rollers in slightly oversize semi-cylindrical pockets formed in its radially inner face and equally spaced along a circle having the axis of the second gear member as its center, n being an integer greater than 2, the first gear member nesting within and axially offset from the second gear member to provide expanding and collapsing chambers between the gear members upon rotation of one gear member relative to the other, each roller being free to move radially except to the extent that such movement may be restricted by its pocket and by rollers of the other gear member, and the diameter of each roller exceeding the spacing between adjacent rollers of the other gear member.
Claim 3
Dependent Claim
15 words
An internal gear set as defined in claim 1 wherein n is at least 5.
Claim 4
Dependent Claim
24 words
An internal gear set as defined in claim 1 wherein the rollers of the first gear member are identical to those of the second.
Claim 5
Dependent Claim
25 words
An internal gear set as defined in claim 1 wherein the first gear member has a central opening for journalling the eccentric of a crankshaft.
Claim 6
Dependent Claim
19 words
An internal gear set as defined in claim 1 wherein the first gear member has an integral central driveshaft.
Claim 7
Dependent Claim
35 words
A hydraulic device incorporating an internal gear set as defined in claim 1 wherein one of said gear members is stationary and the axis of the other orbits about the axis of the stationary member.
Claim 8
Dependent Claim
24 words
An internal gear set as defined in claim 1 wherein the pockets extend arcuately beyond semi-cylinders to hold the rollers in place during assembly.
Claim 9
Dependent Claim
33 words
An internal gear set as defined in claim 1 wherein the diameter of the rollers of each gear member exceeds 120 percent of the spacing between adjacent rollers of the other gear member.
Claim 10
Dependent Claim
122 words
A fluid displacement device incorporating an internal gear set as defined in claim 1 wherein the first gear member is formed with three or more equally spaced holes of equal diameter, each centered on a circle, the center of which is the axis of the first gear member, which fluid displacement device includes a drive shaft concentric with the second gear member and an integral plate having a cycloid pin for each said hole, said pins being centered on a circle having its center at the axis of the driveshaft and a radius equal to that of the first-mentioned circle, the diameter of said holes approximately equalling or exceeding the diameter of each pin plus twice the eccentricity of the gear set.
Claim 11
Dependent Claim
22 words
A fluid displacement device as defined in claim 9 wherein said holes are centered in the rollers of the first gear member.
Claim 12
Dependent Claim
166 words
An internal gear set as defined in claim 1, the second gear member having m identical rollers in slightly oversize pockets formed in its radially outer face and equally spaced along a circle having the axis of the second gear member as its center, which gear set further includes a third gear member having m + 1 identical rollers in slightly oversize pockets formed in its radially inner face and equally spaced along a circle having the axis of the third member as its center, m being an integer greater than 2, the second gear member nesting within and axially offset from the third gear member to provide upon relative rotation an outer set of expanding and collapsing chambers, each gear member being rotatable on a unique fixed axis, the three axes lying on a straight line, the distance between the axes of the second and third gear members being an integral multiple of the distance between the axes of the first and second gear members.
Claim 13
Dependent Claim
18 words
An internal gear set as defined in claim 11 wherein the integral multiple is 2, 3 or 4.
Claim 14
Dependent Claim
34 words
A hydraulic device incorporting an internal gear set as defined in claim 11 wherein both the expanding outer chambers and the expanding first-mentioned chambers are on the same side of the internal gear set.
Claim 15
Dependent Claim
29 words
A hydraulic device incorporating an internal gear set as defined in claim 11 wherein the outer chambers expand 180° out of phase with the expansion of the first-mentioned chambers.
Claim 16
Dependent Claim
15 words
An internal gear set as defined in claim 11 wherein m equals n + 1.
Claim 17
Dependent Claim
25 words
An internal gear set as defined in claim 15 wherein each outer-facing pocket of the second gear member is midway between its adjacent inner-facing pockets.
References Cited (Backward Citations)
US1389189A
Cited
GB228548A
Cited
US1968113A
Cited
US3424095A
Cited
US3289602A
Cited
US3623829A
Cited
US3723032A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-07 | 1980-03-08 | 1980-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-07 | 1984-03-08 | 1984-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-07 | 1988-03-08 | 1988-09-07 | $7700.00 | Window Closed / Lapsed |