US3680672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brake for stopping a broken driven shaft
Assignee: Ltv Electrosystems Inc
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Filing: 1970-08-17
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Granted: 1972-08-01
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Expires: 1990-08-17
Abstract
Abstract A control or brake apparatus for stopping or arresting rotation of a driven shaft which includes brake means operable hydraulicly to release the brake apparatus to permit rotation of the driven shaft and a releasable lock means operable upon the breaking of the driven shaft at a location between its connection with a driving shaft and the location of the application of a load to the driven shaft for releasing the brake to cause it to become operative and stop rotation of the brake to arrest rotation of the driven shaft, the hydraulic means being operably only when the pressure of fluid in a supply hydraulic fluid system exceeds a predetermined value.
Inventors
- 👤 Jack Mccurley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:03
CPC Classifications
F; F16; F16D; F16D59/00; F16D59/02; F16D55/00; F16D55/24; F16D55/26; F16D55/36; F16D55/40; F16D65/00; F16D65/78; F16D65/84; F16D65/853; F16D2055/0004; F16D2055/0058
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
215 words
A control apparatus for a driven shaft rotatable in a first housing and having one end connected to a driving shaft and an opposite end extending outwardly of the first housing, the shafts having sensor means operatively associated therewith and operable on relative rotation of the driving shaft relative to said driven shaft, said control apparatus including: a stator housing rigidly securable to said first housing; a rotor in said stator housing securable to said opposite end of said driven shaft for rotation therewith; first and second co-engageable means mounted for longitudinal non-rotatable movement on said housing and said rotor, respectively; pressure means movable between an operative position wherein said pressure means holds said first and second means in compressive frictional engagement with one another for preventing rotation of said rotor and said driven shaft relative to said stator housing and an inoperative position wherein said first and second means are free for relative rotary movement relative to one another; operator means for moving said pressure means from said operative position toward said inoperative position and including releasable lock means, said lock means being operable by said sensor means upon rotation of one of said shafts relative to the other for releasing said pressure means from said inoperative position for movement to said operative position.
Claim 2
Dependent Claim
215 words
A control apparatus for a driven shaft rotatable in a first housing and having one end connected to a driving shaft and an opposite end extending outwardly of the first housing, the shafts having sensor means operatively associated therewith and operable on relative rotation of the driving shaft relative to said driven shaft, said control apparatus including: a stator housing rigidly securable to said first housing; a rotor in said stator housing securable to said opposite end of said driven shaft for rotation therewith; first and second co-engageable means mounted for longitudinal non-rotatable movement on said housing and said rotor, respectively; pressure means movable between an operative position wherein said pressure means holds said first and second means in compressive frictional engagement with one another for preventing rotation of said rotor and said driven shaft relative to said stator housing and an inoperative position wherein said first and second means are free for relative rotary movement relative to one another; operator means for moving said pressure means from said operative position toward said inoperative position and including releasable lock means, said lock means being operable by said sensor means upon rotation of one of said shafts relative to the other for releasing said pressure means from said inoperative position for movement to said operative position.
Claim 3
Dependent Claim
68 words
The apparatus of claim 1, wherein said first and second co-engageable means comprises rotor rings mounted on said rotor and a plurality of stator rings mounted on said stator, said stator and rotor rings having overlapping interdigitated portions, said pressure means comprising a pressure plate and first means biasing said pressure plate toward said operative position wherein said pressure plate holds said overlapped portions in compressed frictional engagement.
Claim 4
Dependent Claim
71 words
The apparatus of claim 2, wherein said operator means comprises an operator piston movable in said stator housing, said operator piston and said pressure plate having co-engageable holding means for moving said pressure plate from said operative position to said inoperative position upon movement of said piston in one direction; and means for introducing hydraulic fluid under pressure to said operator piston to move said operator piston in said one direction.
Claim 5
Dependent Claim
73 words
The operator apparatus of claim 3, wherein said operator piston is tubular and said lock means comprise a piston mounted for limited longitudinal movement in said operator piston and having means engageable with said holding means of said operator piston for holding said holding means of said operator piston in position engageable with said holding means of said pressure plate; and second biasing means biasing said lock piston to its operative locking position.
Claim 6
Dependent Claim
55 words
The apparatus of claim 4, wherein said lock piston is movable longitudinally in said one direction to permit movement of said holding means of said operator piston out of engagement with said holding means of said pressure plate to permit release of said pressure plate for movement from its inoperative position to its operative position.
Claim 7
Dependent Claim
53 words
The apparatus of claim 5, wherein said holding means of said operator piston comprise a plurality of resilient collet fingers having external bosses engageable with said pressure plate when said collet fingers are in expanded position, said lock piston and said collet fingers having means holding said collet fingers in said expanded position.
Claim 8
Dependent Claim
47 words
The apparatus of claim 6, wherein said bosses and said holding means have co-engageable cam means for moving said collet fingers inwardly when said lock piston is moved in said one direction and said pressure plate is moved toward its operative position by said first biasing means.
Claim 9
Dependent Claim
64 words
The apparatus of claim 7, and means for introducing hydraulic fluid under pressure to said pistons to move said pistons in a second direction opposite said one direction relative to said pressure plate when said pressure plate is in said operative position to cause said collet fingers to move to expanded position and said lock piston to hold said collet fingers in expanded position.
Claim 10
Dependent Claim
214 words
In combination: a driving shaft; a first housing; a driven shaft rotatable in said first housing and having one end connected to said driving shaft and an opposite end extending outwardly of the first housing, sensor means operatively associated with said shaft and operable on relative rotation of the driving shaft relative to said driven shaft, a stator housing rigidly secured to said first housing; a rotor in said stator housing securable to said opposite end of said driven shaft for rotation therewith; first and second co-engageable means mounted for longitudinal non-rotatable movement on said housing and said rotor, respectively; pressure means movable between an operative position wherEin said pressure means holds said first and second means in compressive frictional engagement with one another for preventing rotation of said rotor and said driven shaft relative to said stator housing and an inoperative position wherein said first and second means are free for relative rotary movement relative to one another; operator means for moving said pressure means from said operative position toward said inoperative position and including releasable lock means, said lock means being operable by said sensor means upon rotation of one of said shafts relative to the other for releasing said pressure means from said inoperative position for movement to said operative position.
Claim 11
Dependent Claim
214 words
In combination: a driving shaft; a first housing; a driven shaft rotatable in said first housing and having one end connected to said driving shaft and an opposite end extending outwardly of the first housing, sensor means operatively associated with said shaft and operable on relative rotation of the driving shaft relative to said driven shaft, a stator housing rigidly secured to said first housing; a rotor in said stator housing securable to said opposite end of said driven shaft for rotation therewith; first and second co-engageable means mounted for longitudinal non-rotatable movement on said housing and said rotor, respectively; pressure means movable between an operative position wherEin said pressure means holds said first and second means in compressive frictional engagement with one another for preventing rotation of said rotor and said driven shaft relative to said stator housing and an inoperative position wherein said first and second means are free for relative rotary movement relative to one another; operator means for moving said pressure means from said operative position toward said inoperative position and including releasable lock means, said lock means being operable by said sensor means upon rotation of one of said shafts relative to the other for releasing said pressure means from said inoperative position for movement to said operative position.
Claim 12
Dependent Claim
69 words
The apparatus of claim 9, wherein said first and second co-engageable means comprises rotor rings mounted on said rotor and a plurality of stator rings mounted on said stator, said stator and rotor rings having overlapping interdigitated portions, said pressure means comprising a pressure plate and first biasing means biasing said pressure plate toward said operative position wherein said pressure plate holds said overlapped portions in compressed frictional engagement.
Claim 13
Dependent Claim
72 words
The apparatus of claim 10, wherein said operator means comprises an operator piston movable in said stator housing, said operator piston and said pressure plate having co-engageable holding means for moving said pressure plate from said operative position to said inoperative position upon movement of said operator piston in one direction; and means for introducing hydraulic fluid under pressure to said operator piston for moving said operator piston in said one direction.
Claim 14
Dependent Claim
64 words
The operator apparatus of claim 11, wherein said operator piston is tubular and said lock means comprises a lock piston mounted for limited longitudinal movement in said operator piston and having means engageable with said holding means of said operator piston in position engageable with said holding means of said pressure plate, and second biasing means biasing said lock piston to its locking position.
Claim 15
Dependent Claim
55 words
The apparatus of claim 12, wherein said lock piston is movable longitudinally in said one direction to permit movement of said holding means of said operator piston out of engagement with said holding means of said pressure plate to permit release of said pressure plate for movement from its inoperative position to its operative position.
Claim 16
Dependent Claim
53 words
The apparatus of claim 13, wherein said holding means of said operator piston comprise a plurality of resilient collet fingers having external bosses engageable with said pressure plate when said collet fingers are in expanded position, said lock piston and said collet fingers having means holding said collet fingers in said expanded position.
Claim 17
Dependent Claim
47 words
The apparatus of claim 14, wherein said bosses and said holding means have co-engageable cam means for moving said collet fingers inwardly when said lock piston is moved in said one direction and said pressure plate is moved toward its operative position by said first biasing means.
Claim 18
Dependent Claim
64 words
The apparatus of claim 15, and means for introducing hydraulic fluid under pressure to said pistons to move said pistons in a second direction opposite said one direction relative to said pressure plate when said pressure plate is in said operative position to cause said collet fingers to move to expanded position and said lock piston to hold said collet fingers in expanded position.
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) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |