Patent US4564781A successfully refreshed from Google Patents.
US4564781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical bell type motor
Assignee: Individual
•
Filing: 1984-06-26
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Granted: 1986-01-14
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Expires: 2004-06-26
Abstract
Abstract The present invention relates to an electrical bell type motor for driving a surgical tool, with a stator comprising a magnet having the shape of a circular cylinder and a rotor comprising a wire coil of lacquered wire forming a hollow circular cylinder, and a rotor carrier plate made of antimagnetic stainless steel fixed to a rotatable shaft carrying the wire coil. The wire coil at its one front end is fixed to the rotor carrier plate and the other end is self-supporting.
Inventors
- 👤 Richard E. Arnegger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:29
CPC Classifications
H; H02; H02K; H02K23/00; H02K23/56
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
166 words
Electrical bell type motor for driving a surgical hand tool, with a stator comprising a magnet having the shape of a circular cylinder and a rotor, which comprises a wire coil of lacquered wire forming a hollow circular cylinder, and a rotor carrier plate carrying the wire coil and being fixed to a rotatable shaft, in which the wire coil with one of its ends is firmly mounted onto the rotor carrier plate and the other end is self-supporting, wherein the rotor carrier plate consists of a very thin disc of antimagnetic stainless steel and in which the rotor carrier plate together with the wire coil exposed at least twice to a temperature between 130° and 170° C. in dry condition and at least twice at a temperature between 130° and 160° C. in a wet surrounding, preferably in steam and a ring shaped cover of U-shaped cross-section is arranged over the other end of the wire coil which cover is made of antimagnetic stainless steel.
Claim 2
Dependent Claim
166 words
Electrical bell type motor for driving a surgical hand tool, with a stator comprising a magnet having the shape of a circular cylinder and a rotor, which comprises a wire coil of lacquered wire forming a hollow circular cylinder, and a rotor carrier plate carrying the wire coil and being fixed to a rotatable shaft, in which the wire coil with one of its ends is firmly mounted onto the rotor carrier plate and the other end is self-supporting, wherein the rotor carrier plate consists of a very thin disc of antimagnetic stainless steel and in which the rotor carrier plate together with the wire coil exposed at least twice to a temperature between 130° and 170° C. in dry condition and at least twice at a temperature between 130° and 160° C. in a wet surrounding, preferably in steam and a ring shaped cover of U-shaped cross-section is arranged over the other end of the wire coil which cover is made of antimagnetic stainless steel.
Claim 3
Dependent Claim
56 words
The electrical bell type motor according to claim 1 in which the magnet has the shape of a hollow cylinder and is carried by a tube tightly fixed to the inner surface of the magnet, wherein the tube and the magnet carrier plate fixed to the housing of the motor are formed from a single piece.
Claim 4
Dependent Claim
24 words
The electrical bell type motor according to claim 1 in which the surface of the wire coil is provided with a water rejecting coating.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-01-13 | 1989-07-15 | 1990-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-13 | 1993-07-15 | 1994-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-13 | 1997-07-15 | 1998-01-14 | $7700.00 | Window Closed / Lapsed |