US3583250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmission including toothed belt and partially toothed pulley
Assignee: RCA Corp
•
Filing: 1969-04-01
•
Granted: 1971-06-08
•
Expires: 1989-04-01
Abstract
Abstract A transmission is provided including two pulley wheels which re coupled by a toothed belt. One of the pulleys has teeth along the complete periphery thereof, and the other pulley has groups of teeth positioned in spaced relation along the periphery thereof. When the belt is loose, the teeth of the belt are disengaged from the teeth of the other pulley by the stiffness of the belt, permitting slipping of the belt with respect to the other pulley. When the belt is tight, the belt conforms itself to the periphery of the other pulley, whereby the teeth of the belt mesh with the teeth of the pulley providing a positive drive.
Inventors
- 👤 Robert M Kongelka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:29
CPC Classifications
F; F16; F16H; F16H55/00; F16H55/02; F16H55/17; F16H55/171; F16H7/00; F16H7/02; F16H7/023; G; G03; G03B; G03B19/00; G03B19/18; F16H7/08; F16H2007/0889; F16H2007/0893; F16H35/00; F16H2035/003
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
82 words
A pulley for a toothed belt said pulley having an untoothed peripheral portion and a toothed peripheral portion, all points on the teeth in said toothed portion extending radially a distance no greater than the radial distance of said untoothed portion, the roots of the teeth in said toothed portion being a chord of a circle having the radius of the untoothed portion of the pulley and wherein the tops of several of the teeth comprises another chord of the same circle.
Claim 2
Dependent Claim
82 words
A pulley for a toothed belt said pulley having an untoothed peripheral portion and a toothed peripheral portion, all points on the teeth in said toothed portion extending radially a distance no greater than the radial distance of said untoothed portion, the roots of the teeth in said toothed portion being a chord of a circle having the radius of the untoothed portion of the pulley and wherein the tops of several of the teeth comprises another chord of the same circle.
Claim 3
Dependent Claim
118 words
A pulley for a toothed beLt said pulley having a plurality of untoothed peripheral portions and toothed peripheral portions, all points on the teeth in said toothed portions extending radially a distance no greater than the radial distance of said untoothed portions, the number of toothed portions and the number of teeth in the toothed portions and the arrangement of the toothed portions being such that each semiperiphery of the pulley contains a plurality of teeth, the roots of the teeth comprising the group of teeth being a chord of a circle having the radius of the untoothed portions of the pulley and wherein the tops of several of the teeth comprises another chord of the same circle.
Claim 4
Dependent Claim
118 words
A pulley for a toothed beLt said pulley having a plurality of untoothed peripheral portions and toothed peripheral portions, all points on the teeth in said toothed portions extending radially a distance no greater than the radial distance of said untoothed portions, the number of toothed portions and the number of teeth in the toothed portions and the arrangement of the toothed portions being such that each semiperiphery of the pulley contains a plurality of teeth, the roots of the teeth comprising the group of teeth being a chord of a circle having the radius of the untoothed portions of the pulley and wherein the tops of several of the teeth comprises another chord of the same circle.
Claim 5
Dependent Claim
50 words
A transmission comprising two pulleys coupled by a toothed belt one of said pulleys having an untoothed peripheral portion and a toothed peripheral portion, said belt being sufficiently stiff so that the teeth on said belt and the teeth on said pulley do not mesh when the belt is loose.
Claim 6
Dependent Claim
50 words
A transmission comprising two pulleys coupled by a toothed belt one of said pulleys having an untoothed peripheral portion and a toothed peripheral portion, said belt being sufficiently stiff so that the teeth on said belt and the teeth on said pulley do not mesh when the belt is loose.
Claim 7
Dependent Claim
40 words
The invention as expressed in claim 3 in which means are provided to tighten said belt, said belt being sufficiently flexible so that the teeth on said belt and the teeth on said pulley mesh when said belt is tightened.
Claim 8
Dependent Claim
41 words
The invention as expressed in claim 3 in which the toothed portion and the number of teeth in the toothed portion and the arrangement of the toothed portion is such that each semiperiphery of the pulley contains a plurality of teeth.
Claim 9
Dependent Claim
51 words
The invention as expressed in claim 3 in which the roots of the teeth comprising the group of teeth is a chord of a circle having the radius of the untoothed portion of the pulley and wherein the tops of several of the teeth comprises another chord of the same circle.
Claim 10
Dependent Claim
32 words
The invention as expressed in claim 3 in which all points on the teeth in said toothed portion extend radially a distance no greater than the radial distance of said untoothed portion.
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) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |