US3597987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable speed sheave
Assignee: Individual
•
Filing: 1969-04-25
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Granted: 1971-08-10
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Expires: 1989-04-25
Abstract
Abstract A variable speed sheave employing centrifugal flyweights actuating an axially movable sheave half, utilizes a replaceable washer to take the thrust of the weights, and offsetting or skewing the flyweights to avoid fixed wear tracks under the cams of the flyweights engaging the washer. A die-cast replaceable bushing is employed to support the flyweight pintals and thereby avoid expensive machining of the bearing parts. Six circumferentially spaced positions are provided for flyweights whereby either two, three, four or six flyweights may be employed without disturbing the dynamic balance of the sheave.
Inventors
- 👤 Elmer Carl Kiekhaefer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:58
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/66; F16H61/662; F16H61/66231; F16H61/66245
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
105 words
A variable speed drive sheave employing centrifugal flyweights actuating an axially movable sheave half toward and away from a fixed sheave half on a rotary drive shaft and in which said axially movable sheave half is interlocked to rotate with said fixed sheave half and each flyweight has an end portion bearing against a free floating wear washer disposed between the flyweights and the abutting portion of the hub of the axially movable sheave, and each flyweight is disposed nonradially relative to the corresponding radius of the sheave to effect an increment of rotation of the washer each time the sheave is increased in speed.
Claim 2
Dependent Claim
105 words
A variable speed drive sheave employing centrifugal flyweights actuating an axially movable sheave half toward and away from a fixed sheave half on a rotary drive shaft and in which said axially movable sheave half is interlocked to rotate with said fixed sheave half and each flyweight has an end portion bearing against a free floating wear washer disposed between the flyweights and the abutting portion of the hub of the axially movable sheave, and each flyweight is disposed nonradially relative to the corresponding radius of the sheave to effect an increment of rotation of the washer each time the sheave is increased in speed.
Claim 3
Dependent Claim
20 words
The construction of claim 1 in which each flyweight is skewed with respect to the corresponding radius of the sheave.
Claim 4
Dependent Claim
19 words
The construction of claim 1 in which each flyweight is laterally offset from the corresponding radius of the sheave.
Claim 5
Dependent Claim
123 words
A variable speed drive sheave employing centrifugal flyweights actuating an axially movable sheave half toward and away from a fixed sheave half on a rotary drive shaft and in which said axially movable sheave half is interlocked to rotate with said fixed sheave half and each flyweight has an end portion bearing against a free floating wear washer disposed between the flyweights and the abutting portion of the hub of the axially movable sheave, and each flyweight is provided with axially aligned trunnions on opposite sides thereof, a flyweight housing is carried by the drive shaft for the sheave and has a pair of webs for supporting each flyweight, and separate bushing for each flyweight trunnion is removably mounted in a corresponding web.
Claim 6
Dependent Claim
123 words
A variable speed drive sheave employing centrifugal flyweights actuating an axially movable sheave half toward and away from a fixed sheave half on a rotary drive shaft and in which said axially movable sheave half is interlocked to rotate with said fixed sheave half and each flyweight has an end portion bearing against a free floating wear washer disposed between the flyweights and the abutting portion of the hub of the axially movable sheave, and each flyweight is provided with axially aligned trunnions on opposite sides thereof, a flyweight housing is carried by the drive shaft for the sheave and has a pair of webs for supporting each flyweight, and separate bushing for each flyweight trunnion is removably mounted in a corresponding web.
Claim 7
Dependent Claim
42 words
The construction of claim 4 in which the housing has six pairs of webs equally spaced circumferentially thereof to provide for selective employment of two, three, four or six flyweights for the sheave with the flyweights disposed in a dynamic balanced relation.
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) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |