Patent US3682015A successfully refreshed from Google Patents.
US3682015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pinion construction
Assignee: Rexnord Industries LLC
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Filing: 1971-03-05
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Granted: 1972-08-08
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Expires: 1991-03-05
Abstract
Abstract A pinion construction comprising a major toothed portion, a minor toothed portion and a shaft wherein there is a torsionally resilient driving means between the minor toothed portion and the shaft, and the teeth on the minor toothed portion are thicker than the teeth on the major toothed portion. A pinion of this construction may be used in a reversing gear drive to provide a reversing pinion which will not vibrate or rattle when it is idling during forward drive operation of the gear drive by virtue of tuning the natural frequency of the reverse gear branch to avoid torsional vibration resonancies.
Inventors
- 👤 William S Richardson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:46
CPC Classifications
F; F16; F16F; F16F15/00; F16F15/10; F16F15/12; F16H; F16H55/00; F16H55/02; F16H55/17; F16H55/18; F16H57/00; F16H57/0006; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19377; Y10T74/19414; Y10T74/19484; Y10T74/19488; Y10T74/19623; Y10T74/19628; Y10T74/19633; Y10T74/1987; Y10T74/19893; Y10T74/19898
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
51 words
A pinion construction comprising, in combination: a shaft; a major toothed portion rigidly mounted on the shaft; a minor toothed portion, and torsionally resilient drive means connecting the minor toothed portion to the shaft; the teeth of the minor toothed portion being thicker than the teeth of the major toothed portion.
Claim 2
Dependent Claim
51 words
A pinion construction comprising, in combination: a shaft; a major toothed portion rigidly mounted on the shaft; a minor toothed portion, and torsionally resilient drive means connecting the minor toothed portion to the shaft; the teeth of the minor toothed portion being thicker than the teeth of the major toothed portion.
Claim 3
Dependent Claim
36 words
A pinion according to claim 1, wherein: the torsionally resilient driving means includes a bushing element attached to the shaft and a plurality of resilient driving keys connecting the minor toothed portion to the bushing element.
Claim 4
Dependent Claim
40 words
A pinion construction according to claim 2 wherein the bushing element includes a hub portion on which the minor toothed portion of the pinion is supported and a collar portion which bears against a side of the minor toothed portion.
Claim 5
Dependent Claim
42 words
A pinion according to claim 1, further including: spacer means positioned between the major toothed portion and the minor toothed portion; and spring means carried by the major toothed portion and arranged to urge the spacer means against the minor toothed portion.
Claim 6
Dependent Claim
115 words
A pinion construction comprising, in combination: a shaft; a major toothed portion rigidly mounted on the shaft; a bushing element mounted on the shaft and including a hub portion carried on the shaft and a collar portion; a minor toothed portion Which is rotatably mounted on the hub portion of the bushing element; torsionally resilient drive means connecting the minor toothed portion to the hub portion of the bushing element; and spacer means between the major toothed portion and the minor toothed portion and arranged to bear against one side of the minor toothed portion, the collar portion of the bushing element being arranged to bear against an opposite side of the minor toothed portion.
Claim 7
Dependent Claim
115 words
A pinion construction comprising, in combination: a shaft; a major toothed portion rigidly mounted on the shaft; a bushing element mounted on the shaft and including a hub portion carried on the shaft and a collar portion; a minor toothed portion Which is rotatably mounted on the hub portion of the bushing element; torsionally resilient drive means connecting the minor toothed portion to the hub portion of the bushing element; and spacer means between the major toothed portion and the minor toothed portion and arranged to bear against one side of the minor toothed portion, the collar portion of the bushing element being arranged to bear against an opposite side of the minor toothed portion.
Claim 8
Dependent Claim
201 words
In a gear drive having a driven gear, a forward pinion meshed with the driven gear to drive it in one direction, a reverse pinion meshed with the driven gear to drive it in an opposite direction, and means to selectively connect one of said pinions to a prime mover to drive the driven gear while the other pinion rotates in an idle condition, the improvement wherein: the reverse pinion comprises a shaft, a major toothed portion rigidly mounted on the shaft, a minor toothed portion mounted on the shaft and rotating relative to the major toothed portion, the teeth of the minor toothed portion being thicker than the teeth of the major toothed portion, and the teeth of both portions being meshed with teeth of the driven gear; the minor toothed portion contacting the sides of teeth of the driven gear when the reverse pinion is in an idle condition with the teeth of the major toothed portion being out of contact with said sides; and both the major toothed portion and the minor toothed portion contacting the sides of teeth of the driven gear when the reverse pinion is connected to a prime mover to drive the driven gear.
Claim 9
Dependent Claim
201 words
In a gear drive having a driven gear, a forward pinion meshed with the driven gear to drive it in one direction, a reverse pinion meshed with the driven gear to drive it in an opposite direction, and means to selectively connect one of said pinions to a prime mover to drive the driven gear while the other pinion rotates in an idle condition, the improvement wherein: the reverse pinion comprises a shaft, a major toothed portion rigidly mounted on the shaft, a minor toothed portion mounted on the shaft and rotating relative to the major toothed portion, the teeth of the minor toothed portion being thicker than the teeth of the major toothed portion, and the teeth of both portions being meshed with teeth of the driven gear; the minor toothed portion contacting the sides of teeth of the driven gear when the reverse pinion is in an idle condition with the teeth of the major toothed portion being out of contact with said sides; and both the major toothed portion and the minor toothed portion contacting the sides of teeth of the driven gear when the reverse pinion is connected to a prime mover to drive the driven gear.
Claim 10
Dependent Claim
98 words
A gear drive according to claim 6, wherein the reverse pinion includes torsionally resilient driving means connecting the minor toothed portion to the shaft, said driving means being flexible to admit relative motion between the minor toothed portion and the major toothed portion when the reverse pinion transmits driving loads but limit relative motion between the minor toothed portion and major toothed portion when the reverse pinion is in an idle condition to thereby prevent contact between teeth of the major toothed portion and teeth of the driven gear when the reverse pinion is in an idle condition.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |