Patent US3727472A successfully refreshed from Google Patents.
US3727472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor-driven actuator
Assignee: Individual
•
Filing: 1971-06-02
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Granted: 1973-04-17
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Expires: 1991-06-02
Abstract
Abstract A motor-driven actuator comprises a reversible motor, a first shaft with a male screw formed at the front portion thereof, a second shaft, and a coupling for slidably and rotatably coupling the first shaft and the rotary shaft of the reversible motor. In this case, the second shaft has female threads engaged with the male screw of the first shaft and the first shaft is rotatably supported by a bearing which is slidably supported by a support, whereby the second shaft is moved in its axial direction.
Inventors
- 👤 M Maekawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:25
CPC Classifications
F; F16; F16H; F16H25/00; F16H25/18; F16H25/20; F16H25/2015; F16H2025/2062; F16H2025/2075; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576; Y10T74/18672
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
160 words
A motor-driven actuator in which a first shaft means having a male screw formed at one portion thereof is coupled with a rotary shaft of a reversible motor through a coupling means and a second shaft means having female threads engageable with the male screw of the first shaft means coupled to the first shaft means, the improvement comprising: a means for slidable supporting the second shaft means; a bearing means for rotatably supporting the non-threaded portion of the first shaft means, the bearing means being supported by the supporting means, slidable with the first shaft means and frictionally engageable with the supporting means; an actuating means actuated by the bearing means to control the rotation of the reversible motor; and a means for adjusting the frictional force between the bearing means and the supporting means whereby a desired force determined by the frictional force between the bearing means and the supporting means is obtained with the second shaft means.
Claim 2
Dependent Claim
160 words
A motor-driven actuator in which a first shaft means having a male screw formed at one portion thereof is coupled with a rotary shaft of a reversible motor through a coupling means and a second shaft means having female threads engageable with the male screw of the first shaft means coupled to the first shaft means, the improvement comprising: a means for slidable supporting the second shaft means; a bearing means for rotatably supporting the non-threaded portion of the first shaft means, the bearing means being supported by the supporting means, slidable with the first shaft means and frictionally engageable with the supporting means; an actuating means actuated by the bearing means to control the rotation of the reversible motor; and a means for adjusting the frictional force between the bearing means and the supporting means whereby a desired force determined by the frictional force between the bearing means and the supporting means is obtained with the second shaft means.
Claim 3
Dependent Claim
69 words
A motor-driven actuator as claimed in claim 1 wherein the frictional force adjusting means includes a substantially U-shaped spring, a pad and a screw respectively provided at both ends of the spring, the pad and the screw of the both ends of the U-shaped spring engaging pads provided on the supporting means, the frictional force between the supporting means and the bearing means being adjusted by turning the screw.
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) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |