Patent US4224841A successfully refreshed from Google Patents.
US4224841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-speed temperature responsive fan clutch
Assignee: Eljer Manufacturing Inc
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Filing: 1978-05-31
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Granted: 1980-09-30
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Expires: 1998-05-31
Abstract
Abstract A multi-speed temperature responsive fan clutch having a planetary gear unit disposed between the drive pulley and an output shaft with there being a low speed clutch and a high speed clutch, both actuated by a temperature responsive device. There is also a speed responsive clutch locking the output shaft to the pulley at low speeds.
Inventors
- 👤 James W. Crooks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:38
CPC Classifications
F; F16; F16H; F16H3/00; F16H3/44; F16H3/46; F16H3/48; F16H3/52; F16H3/54; B; B60; B60K; B60K11/00; F01; F01P; F01P7/00; F01P7/02; F01P7/04; F01P7/046; F16H61/00; F16H61/02; F16H61/0293; F16H2718/00; F16H2718/08; F16H2718/10; F16H2718/12
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
120 words
A multi-speed temperature responsive fan drive including a dead shaft, a rotating drive unit mounted on said dead shaft for rotation, an output shaft mounted on said dead shaft for selective rotation with and relative to said drive unit, a planetary gear unit for selectively coupling said output shaft to said drive unit; said planetary gear unit including a ring gear coupled to said drive unit for rotation therewith, a sun gear rotatably journalled on said dead shaft, and a planetary unit including a carrier fixedly secured to said output shaft; and temperature responsive control means for selectively locking components of said planetary gear unit to selectively vary said rotational speed of said output shaft relative to said drive unit.
Claim 2
Dependent Claim
120 words
A multi-speed temperature responsive fan drive including a dead shaft, a rotating drive unit mounted on said dead shaft for rotation, an output shaft mounted on said dead shaft for selective rotation with and relative to said drive unit, a planetary gear unit for selectively coupling said output shaft to said drive unit; said planetary gear unit including a ring gear coupled to said drive unit for rotation therewith, a sun gear rotatably journalled on said dead shaft, and a planetary unit including a carrier fixedly secured to said output shaft; and temperature responsive control means for selectively locking components of said planetary gear unit to selectively vary said rotational speed of said output shaft relative to said drive unit.
Claim 3
Dependent Claim
33 words
The drive of claim 1 wherein said control means includes a clutch unit between said carrier and said sun gear for controlling the selective rotational speed between said carrier and said sun gear.
Claim 4
Dependent Claim
21 words
The drive of claim 2 wherein said control means includes an actuator for said clutch unit carried by said output shaft.
Claim 5
Dependent Claim
19 words
The drive of claim 1 wherein said clutch unit includes an intermediate clutch member carried by said sun gear.
Claim 6
Dependent Claim
24 words
The drive of claim 1 wherein said clutch unit includes an intermediate clutch member carried by said sun gear in interlocked axial sliding relation.
Claim 7
Dependent Claim
36 words
The drive of claim 1 wherein said clutch unit includes an intermediate clutch member carried by said sun gear in interlocked axial sliding relation and a clamping piston carried by said carrier for axial relative movement.
Claim 8
Dependent Claim
21 words
The drive of claim 6 wherein there is a lever type actuator positioned between said clamping piston and said output shaft.
Claim 9
Dependent Claim
22 words
The drive of claim 2 wherein said control means includes a second clutch unit for controlling the rotation of said sun gear.
Claim 10
Dependent Claim
19 words
The drive of claim 8 wherein there is a single temperature responsive device for sequentially actuating said clutch units.
Claim 11
Dependent Claim
33 words
The drive of claim 8 wherein there is a single temperature responsive device for sequentially actuating said clutch units to first engage said second clutch unit and then the first mentioned clutch unit.
Claim 12
Dependent Claim
16 words
The drive of claim 9 wherein said temperature responsive device is of the linear expansion type.
Claim 13
Dependent Claim
16 words
The drive of claim 9 wherein said temperature responsive device includes an air pressure selector valve.
Claim 14
Dependent Claim
39 words
The drive of claim 8 wherein there is a single temperature responsive device for sequentially actuating said clutch units to first engage said second clutch unit and then the first mentioned clutch unit while releasing said second clutch unit.
Claim 15
Dependent Claim
22 words
The drive of claim 8 wherein there is a third clutch unit for locking said output shaft relative to said drive unit.
Claim 16
Dependent Claim
35 words
The drive of claim 14 wherein said third clutch unit is normally engaged and there is a speed responsive means for releasing said third clutch unit above a preset rotational speed of said drive unit.
Claim 17
Dependent Claim
21 words
The drive of claim 1 wherein there is a clutch unit for locking said output shaft relative to said drive unit.
Claim 18
Dependent Claim
33 words
The drive of claim 16 wherein said clutch unit is normally engaged and there is a speed responsive means for releasing said clutch unit above a preset rotational speed of said drive unit.
Claim 19
Dependent Claim
23 words
The drive of claim 1 wherein said control means includes a low speed clutch unit for controlling the rotation of said sun gear.
Claim 20
Dependent Claim
18 words
The drive of claim 18 wherein said clutch unit is of the radial braking type including clamping shoes.
Claim 21
Dependent Claim
19 words
The drive of claim 19 wherein there is an overrunning clutch between said clutch unit and said sun gear.
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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) | 1983-09-30 | 1984-03-31 | 1984-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-30 | 1988-03-31 | 1988-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-30 | 1992-03-31 | 1992-09-30 | $7700.00 | Window Closed / Lapsed |