Patent US3708243A successfully refreshed from Google Patents.
US3708243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic fan hub
Assignee: Brookside Corp
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Filing: 1971-02-24
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Granted: 1973-01-02
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Expires: 1991-02-24
Abstract
Abstract Disclosed is a hub formed of plastic which carries a fan spider or a blower wheel and has a central bore to accommodate a motor shaft. A cavity is formed in the hub and accommodates a resilient leaf which is threaded on a shaft-engaging set screw extending radially into the central bore. Tightening the set screw on the shaft distorts the resilient member and the internal restoring force thereby exerted by the resilient member holds the hub locked on the shaft despite the normal cold-flow or creep of the hub material.
Inventors
- 👤 J Wooden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:47
CPC Classifications
F; F16; F16D; F16D1/00; F16D1/06; F16D1/08; F16D1/0847; F04; F04D; F04D29/00; F04D29/18; F04D29/20; Y; Y10; Y10T; Y10T403/00; Y10T403/70; Y10T403/7041
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
184 words
A plastic hub for mounting a driven element such as a fan, blower wheel or the like on a motor shaft, said hub comprising a body having a central bore therethrough adapted to receive a motor shaft, said body being formed to provide a cavity extending in depth parallel to the longitudinal axis of said central bore and extending in width transverse to the longitudinal axis of said central bore, a set screw extending radially from said central bore and accommodated in registering apertures in the walls of said cavity, and a resilient member threaded on said set screw and disposed within said cavity, said resilient member having a dished configuration adapted to be distorted into a flattened configuration by engagement with a wall of said cavity as the inner end of said set screw is moved to locking engagement with a shaft accommodated within said central bore, the restoring force exerted by the distorted resilient member serving to maintain the locking engagement of said set screw with the boreaccommodated shaft despite the normal creep of the material from which said hub is formed.
Claim 2
Dependent Claim
184 words
A plastic hub for mounting a driven element such as a fan, blower wheel or the like on a motor shaft, said hub comprising a body having a central bore therethrough adapted to receive a motor shaft, said body being formed to provide a cavity extending in depth parallel to the longitudinal axis of said central bore and extending in width transverse to the longitudinal axis of said central bore, a set screw extending radially from said central bore and accommodated in registering apertures in the walls of said cavity, and a resilient member threaded on said set screw and disposed within said cavity, said resilient member having a dished configuration adapted to be distorted into a flattened configuration by engagement with a wall of said cavity as the inner end of said set screw is moved to locking engagement with a shaft accommodated within said central bore, the restoring force exerted by the distorted resilient member serving to maintain the locking engagement of said set screw with the boreaccommodated shaft despite the normal creep of the material from which said hub is formed.
Claim 3
Dependent Claim
55 words
A plastic hub as claimed in claim 1 in which said cavity is substantially rectangular and said reSilient member extends substantially to the outer side margins of said cavity and is flattened against the cavity wall nearest the periphery of said hub as said set screw is moved into locking engagement with the bore-accommodated shaft.
Claim 4
Dependent Claim
41 words
A plastic hub as claimed in claim 1 in which said cavity is open across its width at the end of said hub body to permit insertion of said resilient member into said cavity subsequent to the forming of said hub.
Claim 5
Dependent Claim
35 words
A plastic hub as claimed in claim 1 in which a radial annular flange extends from said hub body intermediate the body ends to provide a surface to which a driven element can be attached.
Claim 6
Dependent Claim
50 words
A plastic hub as claimed in claim 1 in which said central bore in the hub body is of truncated circular configuration in cross-section with the flat side facing said cavity and in which one of said registering set screw accommodating apertures intersects said flat side of the central bore.
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) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |