Patent US4021015A successfully refreshed from Google Patents.
US4021015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor-equipped control device for a valve adjusting rod
Assignee: Pont a Mousson SA
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Filing: 1975-07-02
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Granted: 1977-05-03
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Expires: 1995-07-02
Abstract
Abstract A control device for a valve adjusting rod comprising an electric motor having a variable reluctance, the stator of which is attached to the frame of the valve and the rotor of which is connected for rotation with the adjusting rod - coaxially with respect to the latter. The rotor and the adjusting rod are co-rotated by means of a key arrangement which provides for an angular play between the rotor and the rod equal to the angular pitch P of the denticulations of the rotor. Repetition thereof with a nominal couple of the motor makes it possible to increase the locking or unlocking couple of the valve.
Inventors
- 👤 Claude Maeder
- 👤 Jean Georges Sutter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:45
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/04; F16K31/05
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
103 words
In a valve adjusting mechanism having an electric motor with variable reluctance, said motor having a stator attached to a frame of the valve and a rotor disposed concentrically within said stator, said rotor and stator being provided with denticulations having a predetermined angular pitch, and an adjusting rod connected to a valve, the improvement comprising a mating system means connecting the rotor to the adjusting rod to cause said adjusting rod to rotate with said rotor while allowing angular play between the rotor and the adjusting rod at least equal to the angular pitch of the denticulations of the rotor and stator.
Claim 2
Dependent Claim
103 words
In a valve adjusting mechanism having an electric motor with variable reluctance, said motor having a stator attached to a frame of the valve and a rotor disposed concentrically within said stator, said rotor and stator being provided with denticulations having a predetermined angular pitch, and an adjusting rod connected to a valve, the improvement comprising a mating system means connecting the rotor to the adjusting rod to cause said adjusting rod to rotate with said rotor while allowing angular play between the rotor and the adjusting rod at least equal to the angular pitch of the denticulations of the rotor and stator.
Claim 3
Dependent Claim
71 words
A device as claimed in claim 1, characterized in that the mating system consists of a keying arrangement comprising a key 14 engaging in two grooves: one of the grooves and the key each comprising trapezoidal sections, the non-parallel sides of which form an angle which is smaller by at least an angular pitch P than the angle formed by the non-parallel sides of the other groove having a trapezoidal section.
Claim 4
Dependent Claim
30 words
A device as claimed in claim 2, characterized in that one of the grooves is situated on the inner surface of the rotor and the other on the adjusting rod.
Claim 5
Dependent Claim
38 words
A device as claimed in claim 2, characterized in that one of the grooves is situated on the inner surface of two annular plates integral with the rotor and the other groove is situated on the adjusting rod.
Claim 6
Dependent Claim
51 words
A device as claimed in claim 1, characterized in that the mating system consists of a hollow shaft adapted for rotation with the rotor and coaxial to the adjusting rod (1), the internal surface of which has a geometrical section which cooperates with the external surface of the adjusting rod (1).
Claim 7
Dependent Claim
68 words
A device as claimed in claim 5, characterized in that the section of the internal surface of the hollow shaft and the section of the external surface of the rod (1) are square and the respective sides L and 1 thereof are such that L is smaller than L/(cos p + sin p) and greater than L√2 and is the angular pitch of the denticulations of the rotor.
Claim 8
Dependent Claim
63 words
A device as claimed in claim 5, characterized in that the section of the internal surface of the hollow shaft and the section of the external surface of the rod (1) are hexagonal and their respective sides L' and l' are such that l' is smaller than ##EQU3## and greater than ##EQU4## and constitutes the angular pitch of the denticulations of the rotor.
Claim 9
Dependent Claim
45 words
A device as claimed in claim 1, characterized in that the mating arrangement is a rotary drive system wherein the adjusting rod is provided with integral axial denticulations which cooperate with integral axial denticulations provided on the rotor; angular play being provided between the denticulations.
Claim 10
Dependent Claim
35 words
A device as claimed in claim 1, characterized in that the mating arrangement is provided between the rotor and an extension of the adjusting rod; said extension being designed for rotation with the adjusting rod.
References Cited (Backward Citations)
US2589999A
Cited
US2992807A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-02 | 1980-11-01 | 1981-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-02 | 1984-11-01 | 1985-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-02 | 1988-11-01 | 1989-05-03 | $7700.00 | Window Closed / Lapsed |