Patent US3645148A successfully refreshed from Google Patents.
US3645148A
Expired / Lapsed
US
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Skew axis gearing
Assignee: Pitney Bowes Inc
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Filing: 1970-06-15
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Granted: 1972-02-29
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Expires: 1990-06-15
Abstract
Abstract The disclosed skew axis gearing includes a face gear which is driven by a cylindrical pinion or worm gear having a constant lead throughout its axial length. The pinion teeth are of trapezoidal cross section and are symmetrical to a bisecting axis perpendicular to the pinion axis. Thus the pinion teeth have equal pressure angles.
Inventors
- 👤 Ernst Schrempp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:53
CPC Classifications
F; F16; F16H; F16H1/00; F16H1/02; F16H1/04; F16H1/12; F16H1/14; F16H1/145; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19642; Y10T74/19688; Y10T74/19698; Y10T74/19828
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
124 words
Skew axis gearing comprising, in combination; A. a face gear; B. a cylindrical pinion gear in meshing engagement with said face gear; and C. at least one helical thread of constant lead formed on said pinion gear, said thread having 1. a trapezoidal profile which is symmetrical about a bisecting axis perpendicular to the axis of said pinion gear to provide equal pressure angles, and 2. a lead determined in accordance with the formula: L 2 pi O/R where O equals the offset of the pinion gear axis from the face gear axis measured along an axis perpendicular to both gear axes, and R equals the gear ratio or the ratio of the number of face gear teeth to the number of pinion threads.
Claim 2
Dependent Claim
124 words
Skew axis gearing comprising, in combination; A. a face gear; B. a cylindrical pinion gear in meshing engagement with said face gear; and C. at least one helical thread of constant lead formed on said pinion gear, said thread having 1. a trapezoidal profile which is symmetrical about a bisecting axis perpendicular to the axis of said pinion gear to provide equal pressure angles, and 2. a lead determined in accordance with the formula: L 2 pi O/R where O equals the offset of the pinion gear axis from the face gear axis measured along an axis perpendicular to both gear axes, and R equals the gear ratio or the ratio of the number of face gear teeth to the number of pinion threads.
Claim 3
Dependent Claim
58 words
a lead determined in accordance with the formula: L 2 pi O/R where O equals the offset of the pinion gear axis from the face gear axis measured along an axis perpendicular to both gear axes, and R equals the gear ratio or the ratio of the number of face gear teeth to the number of pinion threads.
Claim 4
Dependent Claim
58 words
a lead determined in accordance with the formula: L 2 pi O/R where O equals the offset of the pinion gear axis from the face gear axis measured along an axis perpendicular to both gear axes, and R equals the gear ratio or the ratio of the number of face gear teeth to the number of pinion threads.
Claim 5
Dependent Claim
18 words
The skew axis gearing defined in claim 1, wherein the thread pressure angles are each 14 1/2 *.
Claim 6
Dependent Claim
17 words
The skew axis gearing defined in claim 1, wherein said face gear is formed of molded plastic.
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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |