US3789464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coupling releasable under tension
Assignee: Tampella Oy AB
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Filing: 1972-05-08
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Granted: 1974-02-05
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Expires: 1992-05-08
Abstract
Abstract A coupling arrangement capable of being released while the coupling is under considerable tension and particularly adapted to connect an object to a roller chain or similar device having at least two cross elements like the rollers of a chain. A lever has an offset front end which engages one of the cross members and has a coupling element pivoted to its other end to engage the other crossed element. The offset end of the lever is recessed to pivotally engage the first cross element and the coupling element has a recess which engages under the second cross element. The line of force between the lever and object is offset to one side of the first cross element to provide a moment of force that assists pivoting the lever to a released position about the first cross element. A spring urged latch normally maintains the coupling element in its locked position in which pivotal movement of the lever about the first cross element is prevented.
Inventors
- 👤 H Collanus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:01
CPC Classifications
F; F41; F41A; F41A25/00; F41A25/26; B; B60; B60D; B60D1/00; B60D1/14; B60D1/18; B60D1/187; Y; Y10; Y10T; Y10T24/00; Y10T24/21; Y10T24/2177
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
120 words
A releasable coupling comprising a. first coupling means including at least two cross elements spaced from each other, b. second coupling means including a lever having means for engaging one of said cross elements and a coupling element for engaging the other of said cross elements, c. pivot means mounting said coupling element on said lever for pivotal movement to a release position in which said lever is free to swing relative to said first cross element, and d. latch means normally holding the coupling element in a coupling position and operable to release said coupling element for movement to said release position, e. whereby said first and second coupling means may be released from each other while under tension.
Claim 2
Dependent Claim
120 words
A releasable coupling comprising a. first coupling means including at least two cross elements spaced from each other, b. second coupling means including a lever having means for engaging one of said cross elements and a coupling element for engaging the other of said cross elements, c. pivot means mounting said coupling element on said lever for pivotal movement to a release position in which said lever is free to swing relative to said first cross element, and d. latch means normally holding the coupling element in a coupling position and operable to release said coupling element for movement to said release position, e. whereby said first and second coupling means may be released from each other while under tension.
Claim 3
Dependent Claim
28 words
A releasable coupling according to claim 1 further comprising connecting means for connecting said first and second coupling means respectively to an object and to a traction unit.
Claim 4
Dependent Claim
49 words
A releasable coupling according to claim 1 wherein said one cross element and lever, and said other cross element and coupling element respectively include cooperating recess and projection means for preventing separation of said second coupling means from said first coupling means in a direction transversely of said lever.
Claim 5
Dependent Claim
34 words
A releasable coupling according to claim 3 wherein said cooperating recess and projection means include bearing surfaces on each of said cross elements and cooperating bearing surfaces on said lever and coupling element respectively.
Claim 6
Dependent Claim
22 words
A releasable coupling according to claim 4 wherein said recess means of said lever and said coupling element face in opposite directions.
Claim 7
Dependent Claim
25 words
A releasable coupling according to claim 1 wherein said first coupling means is a chain, said cross elements being cylindrical cross elements of said chain.
Claim 8
Dependent Claim
47 words
A releasable coupling according to claim 1 wherein said lever is axially elongated, said means for engaging one of said cross elements being offset transversely of the longitudinal axis of the lever and said coupling element being pivotally mounted on said lever adjacent the opposite end thereof.
Claim 9
Dependent Claim
67 words
A releasable coupling according to claim 1 wherein said coupling element includes a first shoulder and said latch means includes a second shoulder for engaging said first shoulder for normally holding said coupling element in a coupling position, said releasable coupling further comprising spring means normally urging said latch means toward a position in which said shoulders interengage to maintain the coupling element in its coupling position.
Claim 10
Independent Claim
117 words
A device for releasably engaging a pair of elements spaced from each other comprising a. a lever having means for engaging one of said elements, b. a coupling element for engaging the other of said elements, c. pivot means mounting said coupling element on said lever for pivotal movement to a release position in which said lever is free to swing relative to said one element, and d. latch means normally holding the coupling element in a coupling position and operable to release said coupling element for movement to said release position, e. whereby said device may be released froM said pair of elements while biased in a direction substantially parallel to the plane of said elements.
Claim 11
Independent Claim
117 words
A device for releasably engaging a pair of elements spaced from each other comprising a. a lever having means for engaging one of said elements, b. a coupling element for engaging the other of said elements, c. pivot means mounting said coupling element on said lever for pivotal movement to a release position in which said lever is free to swing relative to said one element, and d. latch means normally holding the coupling element in a coupling position and operable to release said coupling element for movement to said release position, e. whereby said device may be released froM said pair of elements while biased in a direction substantially parallel to the plane of said elements.
Claim 12
Independent Claim
140 words
A device for releasably engaging a chain at a plurality of locations along the length thereof, said chain having a plurality of cross elements spaced from each other, said device comprising a. a lever having means for engaging one of said cross elements, b. a coupling element for engaging another of said cross elements, c. pivot means mounting said coupling element on said lever for pivotal movement to a release position in which said lever is free to swing relative to said one cross element, and d. latch means normally holding the coupling element in a coupling position and operable to release said coupling element for movement to said release position, e. whereby said device may be released from said chain while biased in a direction substantially to the plane defined by said one and another of said cross elements.
Claim 13
Independent Claim
140 words
A device for releasably engaging a chain at a plurality of locations along the length thereof, said chain having a plurality of cross elements spaced from each other, said device comprising a. a lever having means for engaging one of said cross elements, b. a coupling element for engaging another of said cross elements, c. pivot means mounting said coupling element on said lever for pivotal movement to a release position in which said lever is free to swing relative to said one cross element, and d. latch means normally holding the coupling element in a coupling position and operable to release said coupling element for movement to said release position, e. whereby said device may be released from said chain while biased in a direction substantially to the plane defined by said one and another of said cross elements.
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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) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |