Patent US3866486A successfully refreshed from Google Patents.
US3866486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
One-way rotation control for synchronous motor shafts
Assignee: Garlock Inc
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Filing: 1973-10-09
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Granted: 1975-02-18
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Expires: 1993-10-09
Abstract
Abstract A drive means powered by a synchronous motor includes a gearing worm on the motor shaft meshing with a gear that is adapted to be drivingly connected to apparatus to be driven and said worm and said gear are specially constructed to coact with each other to block rotation of the shaft in one direction and to permit free rotation in the opposite direction.
Inventors
- 👤 Walter L Lechner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:40
CPC Classifications
F; F16; F16H; F16H57/00; F16H57/02; F16H57/039; F16H1/00; F16H1/02; F16H1/04; F16H1/12; F16H1/16; F16H55/00; F16H55/02; F16H55/22; G; G04; G04C; G04C15/00; G04C15/0009; G04C15/0045; F16H2057/02034; F16H2057/02095; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19642; Y10T74/19698; Y10T74/19828; Y10T74/1987; Y10T74/19874; Y10T74/19949; Y10T74/19953
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
81 words
The combination with the shaft of a synchronous motor that is capable of starting in either direction, of a worm on said shaft to rotate therewith, and a gear rotatable about an axis perpendicular to the axis of said shaft and meshing with said worm providing upon energization of the motor for free rotation of the shaft and said gear in one direction, said worm and said gear having portions coactive to block rotation of the shaft in the opposite direction.
Claim 2
Dependent Claim
81 words
The combination with the shaft of a synchronous motor that is capable of starting in either direction, of a worm on said shaft to rotate therewith, and a gear rotatable about an axis perpendicular to the axis of said shaft and meshing with said worm providing upon energization of the motor for free rotation of the shaft and said gear in one direction, said worm and said gear having portions coactive to block rotation of the shaft in the opposite direction.
Claim 3
Dependent Claim
56 words
The combination according to claim 1 wherein said coactive portions are an abutment surface on the worm and a tooth on said gear having a stop surface to abut said abutment surface on the worm when the shaft starts to rotate in the second-mentioned direction and thereby stop rotation of the shaft in the second-mentioned direction.
Claim 4
Dependent Claim
70 words
The combination according to claim 1 wherein said coactive portions comprise a flat abutment surface on the worm intermediate the length thereof and in a plane approximately parallel to the worm axis, and a tooth on said gear which has a stop surface approximately in the plane of the worm axis to abut said abutment surface on the worm and thereby block rotation of the shaft in the second-mentioned direction.
Claim 5
Dependent Claim
24 words
The combination according to claim 1 with the addition of a driving connection between said gear and apparatus to be driven by the motor.
Claim 6
Dependent Claim
24 words
The combination according to claim 1 wherein said gear has means to drivingly coact with means on apparatus to be driven by the motor.
Claim 7
Dependent Claim
32 words
The combination according to claim 1 with the addition of apparatus including a rotatable part to be driven by the motor, and means to drivingly connect said gear to said rotatable part.
Claim 8
Dependent Claim
13 words
The combination according to claim 1 wherein said gear is a spiral gear.
Claim 9
Dependent Claim
99 words
The combination according to claim 2 wherein a plurality of the gear teeth at one side of said stop tooth adjacent to each other and with one immediately adjacent to the stop tooth are relieved at the sides thereof opposite the sides that coact with the worm to drive the gear in the right direction, providing play or backlash between the gear and the worm preventing jamming of the worm and the gear teeth and insuring proper engagement of the stop tooth and said abutment surface of the worm when the worm starts to rotate in the wrong direction.
References Cited (Backward Citations)
US3768325A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |