Patent US3833102A successfully refreshed from Google Patents.
US3833102A
Expired / Lapsed
US
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Fluid operated automatic wear take-up adjusting device for electromagnetic, spring loaded, friction engaging mechanism
Assignee: ZF Friedrichshafen AG
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Filing: 1972-12-18
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Granted: 1974-09-03
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Expires: 1992-12-18
Abstract
Abstract Displacement of the magnetic body of a spring engaged, friction brake or clutch, is automatically adjusted for releasing operation by a valve controlled fluid pressure resisting stop device. Movement of a spring loaded armature in response to wear of a friction disc engaged therewith, displaces a piston confining a pressurized body of fluid by opening of a valve from which a valve rod extends to form a limit stop engaged by the magnetic body that is displaced by the armature in one direction.
Inventors
- 👤 K Stahle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:39
CPC Classifications
F; F16; F16D; F16D55/00; F16D55/24; F16D55/26; F16D55/28; F16D59/00; F16D59/02; F16D65/00; F16D65/38; F16D65/72; F16D65/74; F16D2055/0004; F16D2055/0058; F16D2121/00; F16D2121/18; F16D2121/20; F16D2121/22
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
87 words
In combination with an electromagnetic torgue control engaging mechanism having a backing member and a friction member engageable therewith, a spring-biased armature movably mounted by the backing member and engageable with the friction member, a magnetic body operatively connected to the armature for movement relative thereto, and automatic wear take-up means operatively mounted by the backing member for adjusting the position of the magnetic body relative to the armature in response to wear of the friction member including pressurized valve control means engageable by the magnetic body.
Claim 2
Dependent Claim
87 words
In combination with an electromagnetic torgue control engaging mechanism having a backing member and a friction member engageable therewith, a spring-biased armature movably mounted by the backing member and engageable with the friction member, a magnetic body operatively connected to the armature for movement relative thereto, and automatic wear take-up means operatively mounted by the backing member for adjusting the position of the magnetic body relative to the armature in response to wear of the friction member including pressurized valve control means engageable by the magnetic body.
Claim 3
Dependent Claim
18 words
The combination of claim 1 including means for limiting relative displacement between the armature and the magnetic body.
Claim 4
Dependent Claim
97 words
The combination of claim 2 wherein the pressurized valve control means includes pressure chamber means connected to the backing member enclosing a pressure medium, piston means for confining the pressure medium within the chamber means under pressure, valve means mounted by the piston means for releasing a limited quantity of said pressure medium in response to displacement of the piston means by the armature, and limit stop means connected to the valve means and engageable by the magnetic body for preventing opening of the valve means wheN the magnetic body is displaced to the adjusted position thereof.
Claim 5
Dependent Claim
31 words
The combination of claim 3 wherein said limit stop means comprises a valve rod connected to the valve means and projecting from the piston means into engagement with the magnetic body.
Claim 6
Dependent Claim
13 words
The combination of claim 4 wherein said pressure medium is viscous fluent material.
Claim 7
Dependent Claim
92 words
The combination of claim 1 wherein the pressurized valve control means includes pressure chamber means enclosing a pressure medium, piston means for confining the pressure medium within the chamber means under pressure, valve means mounted by the piston means for releasing a limited quantity of said pressure medium in response to displacement of the piston means by the armature, and limit stop means connected to the valve means and engageable by the magnetic body for preventing opening of the valve means when the magnetic body is displaced to the adjusted position thereof.
Claim 8
Dependent Claim
31 words
The combination of claim 6 wherein said limit stop means comprises a valve rod connected to the valve means and projecting from the piston means into engagement with the magnetic body.
Claim 9
Dependent Claim
13 words
The combination of claim 7 wherein said pressure medium is viscous fluent material.
Claim 10
Dependent Claim
13 words
The combination of claim 6 wherein said pressure medium is viscous fluent material.
Claim 11
Dependent Claim
172 words
In combination with a friction engaging mechanism having a housing, a friction member, an armature movably mounted within the housing, spring means mounted in the housing and engageable with the armature for displacing the friction member into contact with the housing, and magnetic release means for disengaging the armature from the friction member, the improvement including mechanical coupling means connected to the armature for limiting relative movement between the armature and the magnetic release means to positions spaced apart by a maximum flux gap, limit stop means mounted by the housing and engageable by the magnetic means for limiting movement thereof toward the armature to an adjusted position, and automatic wear take-up means operatively connected to the limit stop means for permitting limited displacement thereof by the magnetic means under the bias of the spring means in response to wear of the friction member to maintain a flux gap of constant spacing in the adjusted position of the magnetic means through which the armature is displaced into engagement with the magnetic means.
Claim 12
Dependent Claim
172 words
In combination with a friction engaging mechanism having a housing, a friction member, an armature movably mounted within the housing, spring means mounted in the housing and engageable with the armature for displacing the friction member into contact with the housing, and magnetic release means for disengaging the armature from the friction member, the improvement including mechanical coupling means connected to the armature for limiting relative movement between the armature and the magnetic release means to positions spaced apart by a maximum flux gap, limit stop means mounted by the housing and engageable by the magnetic means for limiting movement thereof toward the armature to an adjusted position, and automatic wear take-up means operatively connected to the limit stop means for permitting limited displacement thereof by the magnetic means under the bias of the spring means in response to wear of the friction member to maintain a flux gap of constant spacing in the adjusted position of the magnetic means through which the armature is displaced into engagement with the magnetic means.
Claim 13
Dependent Claim
49 words
The combination of claim 10 wherein said automatic take-up means includes a fluid entrapping chamber, a piston sealing the chamber, and valve means connected to the limit stop means and the piston for releasing fluid from the chamber in response to said limited displacement of the limit stop means.
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Cited
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Cited
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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) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |