US3756361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clutch-release linkage automatic axially-acting slack adjuster
Assignee: Haldex AB
•
Filing: 1972-03-23
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Granted: 1973-09-04
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Expires: 1992-03-23
Abstract
Abstract An automatic slack adjuster for a clutch mechanism comprises an axially acting telescopically displaceable force transmission mechanism in the clutch actuating linkage having a screw threaded spindle with a self locking pitch for a nut thereon which has opposing clutch surfaces engaging a sleeve member movable in a housing surrounding the spindle. The nut is rotated with the sleeve and clutch survaces to adjust the linkage after a predetermined travel distance by means of a pin extending from the housing to engage a cam slot in the sleeve, which is moved axially within the housing as a clutch engaging force is applied.
Inventors
- 👤 R Persson
- 👤 N Sander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:02
CPC Classifications
F; F16; F16D; F16D25/00; F16D25/12; F16D25/126
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
188 words
For operating an axially acting clutch, an automatic slackadjuster comprising in combination, a housing, a rod part within said housing movable axially when a clutch operating force is applied, a sleEve axially movable with said rod part, a cam surface rotating said sleeve within said housing after a predetermined axial movement, a threaded spindle with a self locking thread thereon movable from the force applied to said rod part, a nut on said spindle having a first clutch surface thereon, a mating first clutch surface on said sleeve for engaging said first clutch surface on said nut after said sleeve is moved in response to said force to thereby rotate said nut on said spindle when siad sleeve rotates, a second clutch surface on said nut, a mating second clutch surface on said rod part, prestressed spring means normally biasing and engaging the second clutch surfaces in the absence of said force being so arranged that when said force overcomes the spring bias of said prestressed spring means and moves the rod part and sleeve the second clutch surfaces become disengaged and the first clutch surfaces become engaged.
Claim 2
Dependent Claim
188 words
For operating an axially acting clutch, an automatic slackadjuster comprising in combination, a housing, a rod part within said housing movable axially when a clutch operating force is applied, a sleEve axially movable with said rod part, a cam surface rotating said sleeve within said housing after a predetermined axial movement, a threaded spindle with a self locking thread thereon movable from the force applied to said rod part, a nut on said spindle having a first clutch surface thereon, a mating first clutch surface on said sleeve for engaging said first clutch surface on said nut after said sleeve is moved in response to said force to thereby rotate said nut on said spindle when siad sleeve rotates, a second clutch surface on said nut, a mating second clutch surface on said rod part, prestressed spring means normally biasing and engaging the second clutch surfaces in the absence of said force being so arranged that when said force overcomes the spring bias of said prestressed spring means and moves the rod part and sleeve the second clutch surfaces become disengaged and the first clutch surfaces become engaged.
Claim 3
Dependent Claim
30 words
A slack-adjuster as defined in claim 1, wherein said rod part within said housing comprises a piston movable by said force and said housing comprises a cylinder for said piston.
Claim 4
Dependent Claim
34 words
A slack-adjuster as defined in claim 1, wherein said cam surface comprises a slot in said sleeve having an axial portion and in inclined portion and a pin in said housing engages said slot.
Claim 5
Dependent Claim
38 words
A slack-adjuster as defined in claim 1 wherein said sleeve has a flange thereof, and said rod part has a mating flange thereon to engage the flange on the sleeve to thereby limit the position of the sleeve.
Claim 6
Dependent Claim
20 words
A slack-adjuster as defined in claim 4, including an anti-friction bearing between said rod part and said prestressed spring means.
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |