US4174643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silent gear wheel
Assignee: Individual
•
Filing: 1977-09-08
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Granted: 1979-11-20
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Expires: 1997-09-08
Abstract
Abstract A gear wheel having a rim with a plurality of teeth around the periphery thereof, a hub within the rim, spokes connected between the rim and the hub, sound absorbing material filling the spaces between the spokes for silencing the noise caused by vibration of the gear wheel, and side plates attached to the rim, hub and spokes and completely covering the openings from the spaces between the spokes for confining the sound absorbing material in the spaces.
Inventors
- 👤 Kotaro Tsukamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:25
CPC Classifications
F; F16; F16H; F16H55/00; F16H55/02; F16H55/14; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19851; Y10T74/19865; Y10T74/1987; Y10T74/19893; Y10T74/19907
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A gear wheel comprising a rim having a plurality of teeth around the periphery thereof, a hub within said rim, spokes connected between said rim and said hub, sound absorbing material filling the spaces between said spokes for silencing the noise caused by vibration of the gear wheel, and side plates attached to said rim, said hub and said spokes and completely covering the openings from the spaces between said spokes for confining the sound absorbing material in said spaces.
Claim 2
Dependent Claim
80 words
A gear wheel comprising a rim having a plurality of teeth around the periphery thereof, a hub within said rim, spokes connected between said rim and said hub, sound absorbing material filling the spaces between said spokes for silencing the noise caused by vibration of the gear wheel, and side plates attached to said rim, said hub and said spokes and completely covering the openings from the spaces between said spokes for confining the sound absorbing material in said spaces.
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) | 1982-11-19 | 1983-05-21 | 1983-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-19 | 1987-05-21 | 1987-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-19 | 1991-05-21 | 1991-11-20 | $7700.00 | Window Closed / Lapsed |