US3659683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromechanical shifting device
Assignee: Individual
•
Filing: 1970-04-20
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Granted: 1972-05-02
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Expires: 1990-04-20
Abstract
Abstract A plunger is adapted to transmit external work to a shifting member. A transmission comprises a screw having male screw threads, a nut which is formed with female screw threads which surround said male screw threads and define a helical guide path therewith, revolving elements disposed in said guide path between and guided by and coupling said male and female screw threads, means for continuously moving said revolving elements in and along said guide path and through the same and back into said guide path, and means holding said nut against rotation. Said transmission is adapted to transform a rotational drive movement of a motor shaft of an electric stop motor into a linear working movement of said plunger. A freewheel clutch is disposed between said motor shaft and said screw and adapted to rigidly couple said motor shaft and screw for rotation in one direction and to uncouple said motor shaft and screw for relative rotation in the opposite direction. Shock-absorbing means are disposed between a holder for the device and the shifting member. The periphery of the freewheel clutch substantially coincides with the periphery of an imaginary cylinder which is contiguous with said crests of said male screw threads.
Inventors
- 👤 Rudolf Betzing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:32
CPC Classifications
F; F16; F16H; F16H25/00; F16H25/18; F16H25/20; F16H25/22; F16H25/2204; B; B60; B60T; B60T13/00; B60T13/02; F16H25/2015; F16D; F16D2121/00; F16D2121/14; F16D2121/16; F16D2121/18; F16D2121/24; F16D2121/26; F16D2125/00; F16D2125/18; F16D2125/20; F16D2125/34; F16D2125/40; F16D2127/00; F16D2127/02; F16H2025/2062; F16H2025/2068; F16H2025/2075; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
220 words
An electromechanical shifting device for shifting at least one shifting member, said device comprising, in combination, support means; a motor connected to said support means and having a motor shaft; a reciprocatable member connected to said shifting member; transmission means between said motor shaft and said reciprocatable member for transforming rotational movement of said shaft into linear movement of said reciprocatable member, said transmission means comprising a screw having male screw threads, and nut non-rotatably arranged about the screw and having female screw threads surrounding said male screw threads and defining with the latter a helical guide path, rolling elements disposed in said guide path and arranged to continuously move in and along said guide path, through the same and back into said guide path for coupling said male to said female screw threads; a freewheel clutch disposed between said motor shaft and said screw and arranged to rigidly couple said motor shaft and said screw for rotation in one direction and to uncouple said motor shaft and screw for relative rotation in the opposite direction, the outer periphery of said wheel of said free wheel clutch substantially coinciding with the periphery of an imaginary cylinder which is contiguous with the crests of said male screw threads; and shock absorbing means disposed between said support means and said shifting member.
Claim 2
Dependent Claim
220 words
An electromechanical shifting device for shifting at least one shifting member, said device comprising, in combination, support means; a motor connected to said support means and having a motor shaft; a reciprocatable member connected to said shifting member; transmission means between said motor shaft and said reciprocatable member for transforming rotational movement of said shaft into linear movement of said reciprocatable member, said transmission means comprising a screw having male screw threads, and nut non-rotatably arranged about the screw and having female screw threads surrounding said male screw threads and defining with the latter a helical guide path, rolling elements disposed in said guide path and arranged to continuously move in and along said guide path, through the same and back into said guide path for coupling said male to said female screw threads; a freewheel clutch disposed between said motor shaft and said screw and arranged to rigidly couple said motor shaft and said screw for rotation in one direction and to uncouple said motor shaft and screw for relative rotation in the opposite direction, the outer periphery of said wheel of said free wheel clutch substantially coinciding with the periphery of an imaginary cylinder which is contiguous with the crests of said male screw threads; and shock absorbing means disposed between said support means and said shifting member.
Claim 3
Dependent Claim
111 words
A shifting device as set forth in claim 1, in which said motor shaft comprises a pot-shaped end portion having a cylindrical inner boundary surface which is substantially an imaginary extension of said periphery of said imaginary cylinder which is contiguous to the crests of said male screw threads, said screw having an end journal which is smaller in cross-section then the core of said screw formed witH said male screw threads, said end journal extending into the cavity of said pot-shaped end portion of said motor shaft, said freewheel clutch being disposed between said end journal and said inner boundary surface of said pot-shaped end portion of said motor shaft.
Claim 4
Dependent Claim
98 words
A shifting device as set forth in claim 1, in which said screw has a core bore having a cylindrical inner boundary surface which is substantially an imaginary extension of the periphery of said imaginary cylinder which is contiguous with the crests of said male screw threads, said motor shaft has an end journal which is smaller in cross-section than the rest of the motor shaft and extends into said core bore, and said freewheel clutch is disposed between said end journal of said motor shaft and said inner boundary surface of the core bore of the screw.
Claim 5
Dependent Claim
95 words
A shifting device as set forth in claim 1, in which said screw is hollow and has an inner boundary surface which is substantially an imaginary extension of the periphery of said imaginary cylinder which is contiguous with the crests of said male screw threads, said motor shaft has an end journal which is smaller in cross-section than the rest of the motor shaft and extends into the interior of said hollow screw, and said freewheel clutch is disposed between said end journal of said motor shaft and said inner boundary surface of said screw.
Claim 6
Dependent Claim
17 words
A shifting device as set forth in claim 1, in which said revolving elements consist of balls.
Claim 7
Dependent Claim
27 words
A shifting device as set forth in claim 1, in which said freewheel clutch comprises needlelike freewheeling elements which are small in cross-section relative to their length.
Claim 8
Dependent Claim
76 words
A shifting device as set forth in claim 1, in which said shifting member is a part of a brake-applying and brake-lifting linkage of a braking device, and which comprises a spring, which is adapted to store energy as a result of the operation of the motor and to use said energy for a brake-applying operation when said spring is allowed to relax, said plunger being operable to perform said working movement in a brake-lifting direction.
Claim 9
Dependent Claim
64 words
A shifting device as set forth in claim 1, wherein said reciprocatable member comprises a plunger including a pot-shaped member, said nut being arranged in said pot-shaped member and including means guiding said plunger for rectilinear movement, and resilient means between said guide means and said plunger for moving the latter in a direction opposite to which the plunger is moved by said motor.
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) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |