US3603175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plural drive clutches with automatic lock
Assignee: English Electric Co Ltd
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Filing: 1969-09-22
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Granted: 1971-09-07
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Expires: 1989-09-22
Abstract
Abstract This invention relates to an actuator having a clutch control mechanism arranged to set the actuator in a position in which it is driven by a motor via a worm wheel or in a manually driven position. The clutch control mechanism includes a yoke which is manually moved by a lever to urge the clutch member into the manual drive position. The yoke is locked in this position by a latch which bears against a rod attached to the yoke. In this position the latch also bears against the worm wheel and is rotated when the latter is motor-driven. Rotation of the latch allows the rod to drop into a hole in the latch and the clutch member moves into engagement with the worm wheel. Rotation of the worm wheel therefore automatically changes the actuator from manual drive to motor drive.
Inventors
- 👤 Peter Horton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:09
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/04; F16K31/05
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
141 words
An actuator including a clutch member movable between first and second operating positions; an output member drivable by said clutch member; a motor-driven rotatable member and a manual drive member; means to urge said clutch member into said first position, in which position it engages said motor-driven rotatable member; clutch-operating means to move the clutch member from said first position into said second position, in which latter position it engages said manual drive member; and a latch member which is pivotally mounted about an axis substantially parallel to the axis of rotation of said motordriven member and which is urged into a latching position in which it latches the clutch member in said second position, said latch member being rotated about its pivot axis, when said motor driven member rotates, to allow the clutch member to return to its first position.
Claim 2
Dependent Claim
141 words
An actuator including a clutch member movable between first and second operating positions; an output member drivable by said clutch member; a motor-driven rotatable member and a manual drive member; means to urge said clutch member into said first position, in which position it engages said motor-driven rotatable member; clutch-operating means to move the clutch member from said first position into said second position, in which latter position it engages said manual drive member; and a latch member which is pivotally mounted about an axis substantially parallel to the axis of rotation of said motordriven member and which is urged into a latching position in which it latches the clutch member in said second position, said latch member being rotated about its pivot axis, when said motor driven member rotates, to allow the clutch member to return to its first position.
Claim 3
Dependent Claim
55 words
An actuator as claimed in claim 1, wherein said clutch-operating means includes a thrust member and a stop on said thrust member, said thrust member being arranged to move said clutch member into said second position, in which position said latch member bears against said stop to latch the clutch member in said second position.
Claim 4
Dependent Claim
34 words
An actuator as claimed in claim 2, wherein said stop passes through an aperture in the latch member, when the latter is rotated, to allow the clutch member to return to said first position.
Claim 5
Dependent Claim
67 words
An actuator as claimed in claim 2, wherein there is provided a yoke member which bears against the clutch member to move the clutch member into said second position, in which the yoke member is pivoted adjacent one end and is engaged by the thrust member at a point adjacent an opposite end, and in which the yoke member acts on said clutch member between said ends.
Claim 6
Dependent Claim
48 words
An actuator as claimed in claim 1 wherein teeth are provided on said clutch member, said manual drive member and said motor-driven member, the teeth on said clutch member being selectively engageable with the teeth on said manual drive member or with the teeth on the motor-driven member.
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) | 1974-09-06 | 1975-03-08 | 1975-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-06 | 1979-03-08 | 1979-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-06 | 1983-03-08 | 1983-09-07 | $7700.00 | Window Closed / Lapsed |