Patent US3592318A successfully refreshed from Google Patents.
US3592318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pressure-operated overload clutch and brake
Assignee: Monsanto Co
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Filing: 1968-12-18
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Granted: 1971-07-13
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Expires: 1988-12-18
Abstract
Abstract A clutch connected between drive and driven shafts and linked to an electropneumatic control unit to effect an automatic, positive disengagement of clutch members and a braking of the driven shaft when a predetermined drive shaft overload torque is sensed by the clutch. The clutch combines frictional and gear-tooth clutch components arranged to operate cooperatively and sequentially.
Inventors
- 👤 Glen E Lyons
- 👤 Douglas J Lamb
- 👤 Paul T Howse Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:21
CPC Classifications
F; F16; F16D; F16D43/00; F16D43/02; F16D43/20; F16D43/202; F16D43/2022; F16D43/2024; F16D67/00; F16D67/02; F16D67/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
168 words
An overload clutch device comprising in combination, a drive shaft having a clutch drive means mounted thereon, a driven shaft having a clutch driven means positioned thereon in fixed rotary and slidable axial relation, biasing means for biasing said clutch driven means into positive clutched relation with said clutch drive means to couple said drive and driven shafts, brake means for braking said clutch driven means and said driven shaft, lever means comprising a pivotal lever rotatably journaled to said clutch driven means, electropneumatic valve control means and power means connected to a source of fluid under pressure and engaging said pivotal lever, whereby said pivotal lever is rockable a predetermined distance in one direction by said clutch driven means responsively to an overload condition to actuate said electropneumatic valve control means and power means to apply a force to said pivotal lever to further rock the latter in said one direction to effect clutch disengagement and an engagement of said brake means with said clutch driven means.
Claim 2
Dependent Claim
168 words
An overload clutch device comprising in combination, a drive shaft having a clutch drive means mounted thereon, a driven shaft having a clutch driven means positioned thereon in fixed rotary and slidable axial relation, biasing means for biasing said clutch driven means into positive clutched relation with said clutch drive means to couple said drive and driven shafts, brake means for braking said clutch driven means and said driven shaft, lever means comprising a pivotal lever rotatably journaled to said clutch driven means, electropneumatic valve control means and power means connected to a source of fluid under pressure and engaging said pivotal lever, whereby said pivotal lever is rockable a predetermined distance in one direction by said clutch driven means responsively to an overload condition to actuate said electropneumatic valve control means and power means to apply a force to said pivotal lever to further rock the latter in said one direction to effect clutch disengagement and an engagement of said brake means with said clutch driven means.
Claim 3
Dependent Claim
59 words
An overload clutch device as in claim 1, wherein said electropneumatic valve control means and power means is positionable to release said force applied to said pivotal lever permitting rockable movement of the latter in the opposite direction by said biased clutch driven means while effecting a brake disengagement and an engagement of said clutch drive and driven means.
Claim 4
Dependent Claim
158 words
An overload clutch device comprising in combination, a first clutch meaNs mounted on a drive shaft, a second clutch means mounted on a driven shaft, said first and second clutch means having engaging surfaces that sense a predetermined overload condition on the drive shaft and responsively separate, bias means for normally biasing said second clutch means into engagement with said first clutch means to drive said driven shaft, pivotal lever means journaled on said second clutch means, valve control means and power means slidably engaging said pivotal lever means, whereby upon said overload condition, said second clutch means displaces away from said first clutch means against the force of said bias means and pivots said pivotal lever means in one direction to energize said valve control means and power means which then acts to pivot said pivotal lever means an additional increment in said one direction to positively disengage said second clutch means from said first clutch means.
Claim 5
Dependent Claim
158 words
An overload clutch device comprising in combination, a first clutch meaNs mounted on a drive shaft, a second clutch means mounted on a driven shaft, said first and second clutch means having engaging surfaces that sense a predetermined overload condition on the drive shaft and responsively separate, bias means for normally biasing said second clutch means into engagement with said first clutch means to drive said driven shaft, pivotal lever means journaled on said second clutch means, valve control means and power means slidably engaging said pivotal lever means, whereby upon said overload condition, said second clutch means displaces away from said first clutch means against the force of said bias means and pivots said pivotal lever means in one direction to energize said valve control means and power means which then acts to pivot said pivotal lever means an additional increment in said one direction to positively disengage said second clutch means from said first clutch means.
Claim 6
Dependent Claim
22 words
An overload clutch device as in claim 3, further comprising brake means for braking said clutch driven means and said driven shaft.
Claim 7
Dependent Claim
57 words
An overload clutch device as in claim 4, wherein said valve control means and power means operates to effect a sequential disengagement of said first and second clutch means and a braking of said second clutch means, and to effect a sequential release of said braked condition and an engagement of said first and second clutch means.
Claim 8
Dependent Claim
21 words
An overload clutch device as in claim 3, wherein said first and second clutch means include toothed and frictionally engaging members.
Claim 9
Dependent Claim
19 words
An overload clutch device as in claim 3, in which said valve control means is an electropneumatic control valve.
Claim 10
Dependent Claim
27 words
An overload clutch device as in claim 3, wherein said second clutch means is mounted on said driven shaft in fixed rotary and slidable axial relation therewith.
Claim 11
Dependent Claim
20 words
An overload clutch device as in claim 3, wherein said drive shaft has at least one textile roll mounted thereon.
References Cited (Backward Citations)
US3298481A
Cited
US3205986A
Cited
US3298488A
Cited
US3360087A
Cited
US3419117A
Cited
US3442362A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |