Patent US3789694A successfully refreshed from Google Patents.
US3789694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction block for lever
Assignee: Deutz Allis Corp
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Filing: 1973-01-02
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Granted: 1974-02-05
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Expires: 1993-01-02
Abstract
Abstract A friction lock on a quadrant lever for providing heavy frictional resistance to pivotal movement in the first direction and light frictional resistance to pivotal movement in the second direction.
Inventors
- 👤 R Haupt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:50
CPC Classifications
G; G05; G05G; G05G5/00; G05G5/12; G05G5/20; G05G5/22; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20396; Y10T74/20576; Y10T74/20636; Y10T74/2066
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
112 words
A friction control on a pivotal lever providing a friction lock in a first direction and a friction lock release in the second direction comprising, a lever, support means pivotally supporting said lever and defining a pivotal axis, a friction block radially spaced from said axis and pivotally mounted on said support means, friction means on said friction block engaging said lever, resilient means on said support means and connected to said friction block biasing said friction means to an engaging position to retard movement of said lever in one direction and permit release of said friction means on said lever to permit said lever to pivot freely in the other direction.
Claim 2
Dependent Claim
112 words
A friction control on a pivotal lever providing a friction lock in a first direction and a friction lock release in the second direction comprising, a lever, support means pivotally supporting said lever and defining a pivotal axis, a friction block radially spaced from said axis and pivotally mounted on said support means, friction means on said friction block engaging said lever, resilient means on said support means and connected to said friction block biasing said friction means to an engaging position to retard movement of said lever in one direction and permit release of said friction means on said lever to permit said lever to pivot freely in the other direction.
Claim 3
Dependent Claim
40 words
A friction control on a pivotal lever as set forth in claim 1 including, a reaction plate frictionally engaging said lever for receiving a reaction force from said friction block to retard movement of said lever in said one direction.
Claim 4
Dependent Claim
55 words
A friction control on the pivotal lever as set forth in claim 1 including a reaction plate supported on said support means, resilient means biasing said reaction plate against said lever to produce a reaction force from said friction block, means for adjustably controlling said resilient means to adjust the reaction force on said lever.
Claim 5
Dependent Claim
102 words
A friction control on a pivotal lever as set forth in claim 1 including means supporting a reaction plate for engaging said lever on the opposing side of said lever from said friction means, means supporting said friction block at a pivotal point on said supporting means radially spaced from said pivotal axis, said friction block positioning said friction means in spaced relation angularly from said pivotal point in the direction of force applied by said lever to thereby produce a diagonal reaction force in the direction of said force to cause self-energization of said friction block when said force is supplied.
Claim 6
Dependent Claim
60 words
A friction control on a pivotal lever as set forth in claim 1 including means supporting a reaction plate on the opposing side of said friction material on said friction block, means supporting said friction block to engage said lever force and produce a diagonal reaction force to the force of said lever to thereby provide a self-energizing brake means.
Claim 7
Dependent Claim
46 words
A friction control on a pivotal lever as set forth in claim 1 including means defining an arcuate slot in said lever, means supporting a reaction plate on said support means having supporting means extending through said arcuate slot to permit pivotal movement of said lever.
References Cited (Backward Citations)
US3693469A
Cited
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 |