US4528862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Precision gear mount
Assignee: Philips North America LLC
•
Filing: 1983-12-20
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Granted: 1985-07-16
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Expires: 2003-12-20
Abstract
Abstract A gear arrangement is provided for precisely driving a goniometer in an X-ray apparatus with zero backlash. This arrangement involves structure for maintaining a preload between a driving pinion gear and a spiroid gear rotating an output shaft. The preload structure may be formed by way of a diaphragm, a finger diaphragm, or a roller bearing acting in combination with a finger diaphragm.
Inventors
- 👤 Michael P. Goldowsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:47
CPC Classifications
F; F16; F16H; F16H1/00; F16H1/02; F16H1/04; F16H1/12; F16H57/00; F16H57/12; F16H57/02; F16H57/021; F16H57/022; F16H2057/0221; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19623; Y10T74/19642; Y10T74/19698; Y10T74/19828; Y10T74/1987; Y10T74/19893; Y10T74/19898
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
67 words
A structure for a gearbox providing absolute positioning accuracy and zero backlash comprising an output shaft disposed for rotation, a longitudinal cylinder disposed concentrically over said shaft for sliding therewith, a spiroid gear wheel mounted on said longitudinal cylinder, a pinion gear for driving said gear wheel, and engaging means for providing a preload between said gear wheel and said pinion gear to maintain precise engagement therebetween.
Claim 2
Dependent Claim
67 words
A structure for a gearbox providing absolute positioning accuracy and zero backlash comprising an output shaft disposed for rotation, a longitudinal cylinder disposed concentrically over said shaft for sliding therewith, a spiroid gear wheel mounted on said longitudinal cylinder, a pinion gear for driving said gear wheel, and engaging means for providing a preload between said gear wheel and said pinion gear to maintain precise engagement therebetween.
Claim 3
Dependent Claim
21 words
A structure according to claim 1, wherein said engaging means includes at least one roller member acting on said gear wheel.
Claim 4
Dependent Claim
29 words
A structure according to claim 2, wherein said engaging means further includes a finger diaphragm acting on said gear wheel at a position diametrically opposed to said roller member.
Claim 5
Dependent Claim
22 words
A structure according to claim 3, wherein said engaging means further includes adjustment means for adjusting said preload on said roller member.
Claim 6
Dependent Claim
22 words
A structure according to claim 2, wherein said engaging means further includes adjustment means for adjusting said preload on said roller member.
Claim 7
Dependent Claim
18 words
A structure according to claim 1, wherein said engaging means includes a diaphragm acting on said gear wheel.
Claim 8
Dependent Claim
19 words
A structure according to claim 1, wherein said engaging means includes a finger diaphragm acting on said gear wheel.
References Cited (Backward Citations)
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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) | 1988-07-15 | 1989-01-14 | 1989-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-15 | 1993-01-14 | 1993-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-15 | 1997-01-14 | 1997-07-16 | $7700.00 | Window Closed / Lapsed |