Patent US1587771A successfully refreshed from Google Patents.
Patent US3756359A successfully refreshed from Google Patents.
US3756359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slip coupling and weston brake for hoists
Assignee: Yale Industrial Products Inc
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Filing: 1971-06-23
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Granted: 1973-09-04
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Expires: 1991-06-23
Abstract
Abstract In a hoist, a Weston type brake mechanism is formed with a friction disk integral with the load shaft, and the driving element of the Weston brake mechanism as well as the ratcheted locking disk of the brake are mounted for rotation in the axis of the load shaft and are effective through the integral friction disk to control the load shaft directly so as to control the load at all times. The driving element of the Weston brake mechanism is made of two parts, one of which is a gear in frictional relationship to the other part, and held assembled thereto by means entirely contained between the two parts so that they function effectively as one. Any failure in the frictional relationship will not affect the functioning of the Weston brake mechanism to control the load.
Inventors
- 👤 K Suez
- 👤 G Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:47
CPC Classifications
B; B66; B66D; B66D5/00; B66D5/02; B66D5/12; B66D2700/00; B66D2700/07
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
228 words
In a hoist of the class described, a load shaft on which the weight of a load is supported, a load lifting member such as a chain or the like, a winding member fixed to said lOad shaft and rotatable integrally therewith for winding and unwinding said load lifting member whereby to lift and lower a load, a Weston brake mounted to said load shaft comprising a disk fixed to said load shaft, a ratcheted locking disk rotatably mounted on said load shaft for rotation relatively thereto, a driving element rotatably mounted on said load shaft for rotation and axial movement relatively thereto, said driving element being formed of two parts, one of said parts being a circular disk rotatably mounted on said load shaft and having side surfaces connected by a peripheral surface generally extending axially along said load shaft, the other part being a circular gear formed as a ring having an inner ring surface fitted on said axially extending surface of said circular disk, means mounted between said axially extending surface and said inner ring surface for yieldingly compelling the integral rotation of said two parts, and means whereby rotation of said driving element relatively to said load shaft effects the axial movement of said driving element relatively to said load shaft to bind said ratcheted disk to said disk fixed to said load shaft.
Claim 2
Dependent Claim
228 words
In a hoist of the class described, a load shaft on which the weight of a load is supported, a load lifting member such as a chain or the like, a winding member fixed to said lOad shaft and rotatable integrally therewith for winding and unwinding said load lifting member whereby to lift and lower a load, a Weston brake mounted to said load shaft comprising a disk fixed to said load shaft, a ratcheted locking disk rotatably mounted on said load shaft for rotation relatively thereto, a driving element rotatably mounted on said load shaft for rotation and axial movement relatively thereto, said driving element being formed of two parts, one of said parts being a circular disk rotatably mounted on said load shaft and having side surfaces connected by a peripheral surface generally extending axially along said load shaft, the other part being a circular gear formed as a ring having an inner ring surface fitted on said axially extending surface of said circular disk, means mounted between said axially extending surface and said inner ring surface for yieldingly compelling the integral rotation of said two parts, and means whereby rotation of said driving element relatively to said load shaft effects the axial movement of said driving element relatively to said load shaft to bind said ratcheted disk to said disk fixed to said load shaft.
Claim 3
Dependent Claim
43 words
In the combination of claim 1, the feature that the axial movement of said driving element is contributed by means fixed to said shaft and including gear means engaging the teeth of said circular gear to drive said two part driving element thereby.
Claim 4
Dependent Claim
49 words
In the combination of claim 1, the feature that said outer peripheral surface and said inner ring surface each form a conical surface extending along the axis of rotation thereof, and spring means pressing said circular gear axially of said disk to effect frictional binding of said conical surfaces.
Claim 5
Dependent Claim
164 words
In a hoist of the class utilizing a Weston brake comprising a friction disk fixed to a brake shaft, a ratcheted locking disk, a driving element, and means for moving said driving element axially of said shaft upon rotation thereof relatively to said shaft, the improvement that comprises forming said driving element of two parts, one of said parts being a circular disk rotatably mounted on said shaft and having an outer circular peripheral surface extending generally along the length of said shaft, the other part being a circular gear formed as a ring with an inner ring surface extending generally along the length of said shaft and being fitted on said outer circular peripheral surface, said circular gear having an outer ring surface with gear teeth thereon, clutch means mounted between said outer peripheral surface and said inner ring surface for yieldingly compelling the integral rotation of said two parts with said shaft, and gear means engaging said teeth of said circular gear.
Claim 6
Dependent Claim
164 words
In a hoist of the class utilizing a Weston brake comprising a friction disk fixed to a brake shaft, a ratcheted locking disk, a driving element, and means for moving said driving element axially of said shaft upon rotation thereof relatively to said shaft, the improvement that comprises forming said driving element of two parts, one of said parts being a circular disk rotatably mounted on said shaft and having an outer circular peripheral surface extending generally along the length of said shaft, the other part being a circular gear formed as a ring with an inner ring surface extending generally along the length of said shaft and being fitted on said outer circular peripheral surface, said circular gear having an outer ring surface with gear teeth thereon, clutch means mounted between said outer peripheral surface and said inner ring surface for yieldingly compelling the integral rotation of said two parts with said shaft, and gear means engaging said teeth of said circular gear.
Claim 7
Dependent Claim
34 words
In the combination of claim 4, the feature that said means yieldingly compelling the integral rotation of said two parts is friction means mounted between said outer peripheral surface and said inner ring surface.
Claim 8
Dependent Claim
51 words
In the combination of claim 4, the feature that said outer peripheral surface and said inner ring surface each form a conical surface extending along the axis of said brake shaft, and including spring means pressing said circular gear axially of said disk to effect frictional binding at said conical surfaces.
Claim 9
Dependent Claim
37 words
In the combination of claim 4, the feature that said means yieldingly compelling rotation of said two parts includes spring means extending along a side surface of said two parts and forming therewith a self contained assembly.
References Cited (Backward Citations)
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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) | 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 |