Patent US949527A successfully refreshed from Google Patents.
Patent US3858700A successfully refreshed from Google Patents.
US3858700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-adjusting clutch or brake
Assignee: FMC Corp
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Filing: 1973-07-09
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Granted: 1975-01-07
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Expires: 1993-07-09
Abstract
Abstract A clutch or brake with relatively movable friction surfaces is provided with an adjustable stop mechanism which includes position adjusting retainer rings to maintain a pre-determined air gap between the friction faces of the clutch armature and magnet frame when separated irrespective of wear. The retainer rings frictionally grip sleeves which are reciprocal between spaced stops on studs or pins fixed to the clutch hub and upon which the armature is reciprocable. The frictional grip of the retainer rings is overcome by the magnetic flux of the field magnet when energized to enable the armature to shift axially to an adjusted position on the sleeves to compensate for wear of the axially facing clutch friction surfaces. The one-way retaining rings maintain the armature at the adjusted position on the sleeves when the clutch is de-energized with the clutch faces at the pre-determined air gap.
Inventors
- 👤 Thomas J Kirschling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:29
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/38; F16D65/40; F16D65/52; F16D65/54; F16D13/00; F16D13/58; F16D13/75; F16D13/757; F16D27/00; F16D27/02; F16D27/04; F16D27/06; F16D55/00; F16D2121/00; F16D2121/18; F16D2121/20
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
208 words
A self-adjusting clutch structure comprising a hub and first and second clutch members having opposed axially faced engageable friction surfaces spaced by a predetermined air gap when said clutch is de-energized, with said first member being movable axially over a guide to engage said second clutch member, said axially movable member being a clutch armature supported by and movable relative to said clutch hub, a slide movable on said guide between first and second stops and retaining means on said slide abutting said axially movable clutch member and frictionally engaged with said slide and affording movement of said movable clutch member relative to said slide after said slide engages said first stop if required to cause engagement of said friction surfaces, with said retaining means maintaining said movable clutch member at the adjusted position on said slide when said clutch is de-energized, said guide having a shoulder and a head with said shoulder comprising said first stop and including a spring arranged around said slide and said shoulder and located between said retaining means and said head to bias said axially movable first member to the de-energized position and including a second spring located between said hub and said armature to hold said armature against said retaining means.
Claim 2
Dependent Claim
208 words
A self-adjusting clutch structure comprising a hub and first and second clutch members having opposed axially faced engageable friction surfaces spaced by a predetermined air gap when said clutch is de-energized, with said first member being movable axially over a guide to engage said second clutch member, said axially movable member being a clutch armature supported by and movable relative to said clutch hub, a slide movable on said guide between first and second stops and retaining means on said slide abutting said axially movable clutch member and frictionally engaged with said slide and affording movement of said movable clutch member relative to said slide after said slide engages said first stop if required to cause engagement of said friction surfaces, with said retaining means maintaining said movable clutch member at the adjusted position on said slide when said clutch is de-energized, said guide having a shoulder and a head with said shoulder comprising said first stop and including a spring arranged around said slide and said shoulder and located between said retaining means and said head to bias said axially movable first member to the de-energized position and including a second spring located between said hub and said armature to hold said armature against said retaining means.
Claim 3
Dependent Claim
225 words
A self-adjusting clutch structure comprising first and second clutch members having opposed axially faced engageable friction surfaces spaced by a predetermined air gap when said clutch is deenergized, with said first member being movable axially over a guide to engage said second clutch member, a slide movable on said guide between first and second stops and retaining means on said slide abutting said axially movable clutch member and frictionally engaged with said slide and affording movement of said movable clutch member relative to said slide after said slide engages said first stop if required to cause engagement of said friction surfaces, with said retaining means maintaining said movable clutch member at the adjusted position on said slide when the clutch is de-energized and wherein said axially movable member is a clutch armature supported by and movable relative to a clutch hub and said guide comprises a stud secured to said hub, and wherein said slide comprises a sleeve arranged around said stud, said stud having a shoulder and a head with said shoulder comprising said first stop and including a spring arranged around said sleeve and said shoulder and located between said retaining means and said head to bias said armature to the de-energized position and including a second spring located between said hub and said armature to hold said armature against said retaining means.
Claim 4
Dependent Claim
225 words
A self-adjusting clutch structure comprising first and second clutch members having opposed axially faced engageable friction surfaces spaced by a predetermined air gap when said clutch is deenergized, with said first member being movable axially over a guide to engage said second clutch member, a slide movable on said guide between first and second stops and retaining means on said slide abutting said axially movable clutch member and frictionally engaged with said slide and affording movement of said movable clutch member relative to said slide after said slide engages said first stop if required to cause engagement of said friction surfaces, with said retaining means maintaining said movable clutch member at the adjusted position on said slide when the clutch is de-energized and wherein said axially movable member is a clutch armature supported by and movable relative to a clutch hub and said guide comprises a stud secured to said hub, and wherein said slide comprises a sleeve arranged around said stud, said stud having a shoulder and a head with said shoulder comprising said first stop and including a spring arranged around said sleeve and said shoulder and located between said retaining means and said head to bias said armature to the de-energized position and including a second spring located between said hub and said armature to hold said armature against said retaining means.
Claim 5
Dependent Claim
36 words
A device in accordance with claim 2 wherein said retaining means comprises a retainer ring with gripping fingers frictionally engaging said sleeve and affording movement of said ring in one direction with respect to said sleeve.
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) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |