Title:
ROTATIONAL CONTROL APPARATUS
Document Type and Number:
WIPO Patent Application WO1995023281
Kind Code:
A3
Abstract:
Rotational control apparatus in the forms of fan clutches (A, A') are shown including an eddy current drive (224). Specifically, the eddy current drive (224) includes a plurality of permanent magnets (226) mounted circumferentially spaced and with alternating polarity by a holder (228) to the input or output of the clutch (A, A') and a magnetically conductive ring (242) mounted to the other of the input or output of the clutch (A, A'). Thus, the output portion and the fan blades mounted thereto are driven at engine speeds when the clutch (A, A') is air actuated and are driven at a rotational speed less than engine speed by the eddy current drive (224) when the clutch (A, A') is not air actuated and without separate controls for the eddy current drive (224). A housing (62) comprises the output portion of the clutch (A) which is rotatably mounted by a bearing (58) to the hub portion (24) of a friction disc (28) which comprises the input portion of the clutch (A). In other forms, the output portion of the clutch (A') is in the form of a hub (20') rotatably mounted on a stationary shaft (24') and the input portion is in the form of a sheave (50') rotatable relative to the hub (20') and the shaft (24'). Additionally, the hub (20') can be braked by rotatably relating the hub (20') to the shaft (24'). In one form, the friction ring (252) includes peripheral gear teeth (256) in slideable gearing relation with gear teeth (250) formed in the housing (62) and is formed of fiber brake material to act as a dampener between the friction disc (28) and the housing (62) to absorb torsional vibration.
Inventors:
SCHILLING HUGH K (US)
DAVIS JOHN B (US)
BREDT ROBERT C (US)
CARLSON KENT (US)
REASY DARREN (US)
DAVIS JOHN B (US)
BREDT ROBERT C (US)
CARLSON KENT (US)
REASY DARREN (US)
Application Number:
PCT/US1995/002363
Publication Date:
December 07, 1995
Filing Date:
February 24, 1995
Export Citation:
Assignee:
HORTON IND (US)
SCHILLING HUGH K (US)
DAVIS JOHN B (US)
BREDT ROBERT C (US)
CARLSON KENT (US)
REASY DARREN (US)
SCHILLING HUGH K (US)
DAVIS JOHN B (US)
BREDT ROBERT C (US)
CARLSON KENT (US)
REASY DARREN (US)
International Classes:
F01P7/08; F16D25/0638; F16D67/04; H02K49/04; (IPC1-7): F01P7/08; F16D25/0638; F16D67/04
Foreign References:
| DE4207710A1 | 1993-09-16 | |||
| US3896911A | 1975-07-29 | |||
| GB1077724A | 1967-08-02 | |||
| EP0202749A1 | 1986-11-26 | |||
| FR2375494A1 | 1978-07-21 | |||
| US5059161A | 1991-10-22 |
Other References:
PATENT ABSTRACTS OF JAPAN vol. 10, no. 323 (M - 531) 5 November 1986 (1986-11-05)
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