US3766790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-jamming ball screw linear actuator
Assignee: Boeing Co
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Filing: 1971-12-29
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Granted: 1973-10-23
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Expires: 1991-12-29
Abstract
Abstract An actuator for moving two elements with respect to one another having structural redundancy so as to maintain the actuator in an operable condition notwithstanding actuator component failures. Two drive mechanisms each connected to an element are mounted on a common track so each is movable with respect to the track. The drive mechanisms are connected to a common shaft which will transmit power from one mechanism to the other in the event of a power loss or other failure in one of the mechanisms.
Inventors
- 👤 N Weir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:49
CPC Classifications
B; B64; B64C; B64C29/00; B64C29/0008; B64C29/0016; B64C29/0033; B64C13/00; F; F16; F16H; F16H25/00; F16H25/18; F16H25/20; F16H25/205; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576; Y10T74/186; Y10T74/19; Y10T74/19023; Y10T74/19051; Y10T74/1907; Y10T74/19074; Y10T74/19112; Y10T74/19116
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
147 words
A redundant actuator for moving a first member relative to a second member through a desired range of travel comprising: a screw; a first and second drive means wherein each includes; a housing, wherein the housing of said first drive means is adapted to be connected to the first member and the housing of said second drive means is adapted to be connected to the second member; a nut rotatably connected to said housing and rotatably mounted on said screw for translation with respect thereto; a no-back locking device connected to said housing and operably connected to said nut for preventing rotation thereof; a differential connected to said housing and operably connected to said no-back locking device; a motor means connected to said housing and operably connected to said differential; and a transmission shaft rotatably and translationally connected to the differential of each of said drive means.
Claim 2
Dependent Claim
147 words
A redundant actuator for moving a first member relative to a second member through a desired range of travel comprising: a screw; a first and second drive means wherein each includes; a housing, wherein the housing of said first drive means is adapted to be connected to the first member and the housing of said second drive means is adapted to be connected to the second member; a nut rotatably connected to said housing and rotatably mounted on said screw for translation with respect thereto; a no-back locking device connected to said housing and operably connected to said nut for preventing rotation thereof; a differential connected to said housing and operably connected to said no-back locking device; a motor means connected to said housing and operably connected to said differential; and a transmission shaft rotatably and translationally connected to the differential of each of said drive means.
Claim 3
Dependent Claim
163 words
A redundant actuator for moving a first member relative to a second member through a desired range of travel comprising: a track means; a first and second drive means operably connected to said track means, longitudinally spaced thereon and translatable with respect thereto, said first drive means adapted to be connected to the first member and said second drive means adapted to be connected to the second member, each drive means including, a translating means mounted on said track means for traversing said track means, a motor means operably connected to said translating means, and a locking means connected to said motor means and to said translating means for locking said translating means to said track means in the event said motor means becomes inoperable; and an operative means connected to said first and second drive means for permitting independent movement of said first and second drive means relative to each other along said track means substantially through the desired range of travel.
Claim 4
Dependent Claim
163 words
A redundant actuator for moving a first member relative to a second member through a desired range of travel comprising: a track means; a first and second drive means operably connected to said track means, longitudinally spaced thereon and translatable with respect thereto, said first drive means adapted to be connected to the first member and said second drive means adapted to be connected to the second member, each drive means including, a translating means mounted on said track means for traversing said track means, a motor means operably connected to said translating means, and a locking means connected to said motor means and to said translating means for locking said translating means to said track means in the event said motor means becomes inoperable; and an operative means connected to said first and second drive means for permitting independent movement of said first and second drive means relative to each other along said track means substantially through the desired range of travel.
Claim 5
Dependent Claim
31 words
The redundant actuator of claim 2 wherein said track means is comprised of a shaft and wherein said translating means are comprised of a nut mounted for rotation upon said screw.
Claim 6
Dependent Claim
41 words
The redundant actuator of claim 3 which includes transmission means for driving said translating means of said first drive means by said motor means of said second drive means when the motor means of said first drive means has become inoperable.
Claim 7
Dependent Claim
106 words
A redundant actuator for moving a first member relative to a second member through a desired range of travel comprising: a track means; a first and second drive means operably connected to said track means, longitudinally spaced thereon and translatable with respect thereto, said first and second drive means including, a first and second translating means, respectively for traversing said track means, and a first and second motor means operatively connected to said first and second translating means respectively for driving said translating means; and means for driving said second translating means by said first motor means in the event said second motor means becomes inoperable.
Claim 8
Dependent Claim
106 words
A redundant actuator for moving a first member relative to a second member through a desired range of travel comprising: a track means; a first and second drive means operably connected to said track means, longitudinally spaced thereon and translatable with respect thereto, said first and second drive means including, a first and second translating means, respectively for traversing said track means, and a first and second motor means operatively connected to said first and second translating means respectively for driving said translating means; and means for driving said second translating means by said first motor means in the event said second motor means becomes inoperable.
Claim 9
Dependent Claim
15 words
The redundant actuator of claim 5 wherein said track means is comprised of a shaft.
Claim 10
Dependent Claim
37 words
The redundant actuator of claim 6 wherein said shaft is comprised of a screw and wherein said first and second translating means are comprised of a first and second nut, respectively mounted for rotation upon said screw.
Claim 11
Dependent Claim
58 words
The redundant actuator of claim 7 wherein said first and second drive means include a first and second locking means connected to said first motor means and to said first nut and to said second motor means and to said second nut, respectively for locking said nut to said screw in the event said motor means becomes inoperable.
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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |