US4072064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-backlash gear assembly
Assignee: Westinghouse Electric Corp
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Filing: 1977-02-02
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Granted: 1978-02-07
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Expires: 1997-02-02
Abstract
Abstract An anti-backlash gear assembly including an hydraulic piston that automatically maintains clearance-filling positioning of two relatively circumferentially adjustable axial parts of a split gear by receipt of hydraulic fluid from a local accumulator via a fluid-retaining check valve means.
Inventors
- 👤 Wayne B. Lloyd
- 👤 John H. Staehlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:04
CPC Classifications
F; F16; F16H; F16H55/00; F16H55/02; F16H55/17; F16H55/18; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19623; Y10T74/1987; Y10T74/19893; Y10T74/19898
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
95 words
An anti-backlash gear assembly comprising, mating gears having interengaging teeth for effecting a driving relationship therebetween, geartooth clearance adjusting means for said mating gears, hydraulic piston means operatively connected to said geartooth clearance adjusting means, an accumulator storing hydraulic fluid for supply to said piston means, check valve means for retaining hydraulic fluid supplied to said piston means, and bias means for urging hydraulic fluid to flow from said accumulator to said piston means via said check valve means upon existence of any backlash-inducing clearance during relaxation of driving effort between said interengaging gear teeth.
Claim 2
Dependent Claim
95 words
An anti-backlash gear assembly comprising, mating gears having interengaging teeth for effecting a driving relationship therebetween, geartooth clearance adjusting means for said mating gears, hydraulic piston means operatively connected to said geartooth clearance adjusting means, an accumulator storing hydraulic fluid for supply to said piston means, check valve means for retaining hydraulic fluid supplied to said piston means, and bias means for urging hydraulic fluid to flow from said accumulator to said piston means via said check valve means upon existence of any backlash-inducing clearance during relaxation of driving effort between said interengaging gear teeth.
Claim 3
Dependent Claim
26 words
The anti-backlash gear assembly of claim 1, wherein, said bias means includes spring means disposed within said accumulator and other spring means disposed without said accumulator.
Claim 4
Dependent Claim
17 words
The anti-backlash gear assembly of claim 1, wherein, said bias means is disposed exclusively within said accumulator.
Claim 5
Dependent Claim
34 words
The anti-backlash gear assembly of claim 1, wherein, said geartooth clearance adjusting means is in the form of a split gear having side-by-side sections with teeth adjustable circumferentially, one section relative to the other.
References Cited (Backward Citations)
US2081644A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-06 | 1981-08-08 | 1982-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-06 | 1985-08-08 | 1986-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-06 | 1989-08-08 | 1990-02-07 | $7700.00 | Window Closed / Lapsed |