US3909673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Installation for stopping drive motor of rotating machine in event of destruction of a rotating machine part
Assignee: MAN AG
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Filing: 1974-02-01
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Granted: 1975-09-30
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Expires: 1994-02-01
Abstract
Abstract An installation has been provided for shutting off the drive motors of rotating machine parts in case of overload or shortcircuit by extending the power supply wires between the stator winding of the motor and a connector plug, loop-shaped in a boss protruding into the space accommodating the rotating machine part so that the power supply wires are broken when the boss is sheared off upon mechanical failure of the machine part. The present invention provides improved means for enhancing the shearing-off of the boss during mechanical failure of the machine part by rotational forces. The improvements include providing the boss with a notch-like portion at its connection with the device and by attaching the boss to the device by means of thin, pinlike connecting means.
Inventors
- 👤 Ottmar Kreissl
- 👤 Eckhard Pritsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:12
CPC Classifications
H; H02; H02H; H02H5/00; H02H5/10; F; F16; F16P; F16P7/00; F16P7/02; H02K; H02K11/00; H02K11/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
117 words
In a device for automatically stopping a drive motor of a rotating member in the event of rotational destruction of the rotating member, said device being of the type having a pin-like boss means disposed adjacent to a rotating portion of said member in such a manner to be struck by fragments of said rotating member in the event of destruction thereof, wherein a portion of the power supply wires to the drive motor are disposed within said boss means, the improvement comprising said boss means being provided with a notch at the connection of said boss means to the device so that shearing of said boss means upon being struck by said fragments will be enhanced.
Claim 2
Dependent Claim
117 words
In a device for automatically stopping a drive motor of a rotating member in the event of rotational destruction of the rotating member, said device being of the type having a pin-like boss means disposed adjacent to a rotating portion of said member in such a manner to be struck by fragments of said rotating member in the event of destruction thereof, wherein a portion of the power supply wires to the drive motor are disposed within said boss means, the improvement comprising said boss means being provided with a notch at the connection of said boss means to the device so that shearing of said boss means upon being struck by said fragments will be enhanced.
Claim 3
Dependent Claim
115 words
In a device for automatically stopping a drive motor of a rotating member in the event of rotational destruction of the rotating member, said device being of the type having a pin-like boss means disposed adjacent to a rotating portion of said member in such a manner to be struck by fragments of said rotating member in the event of destruction thereof, wherein a portion of the power supply wires to the drive motor are disposed within said boss means, the improvement comprising pin-like connecting means for connecting said boss means to the device, said pin-like connecting means being sufficiently thin such that said boss means will be sheared upon being struck by said fragments.
Claim 4
Dependent Claim
115 words
In a device for automatically stopping a drive motor of a rotating member in the event of rotational destruction of the rotating member, said device being of the type having a pin-like boss means disposed adjacent to a rotating portion of said member in such a manner to be struck by fragments of said rotating member in the event of destruction thereof, wherein a portion of the power supply wires to the drive motor are disposed within said boss means, the improvement comprising pin-like connecting means for connecting said boss means to the device, said pin-like connecting means being sufficiently thin such that said boss means will be sheared upon being struck by said fragments.
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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |