Brakes – Internal-resistance motion retarder – Magnetic fluid or material
Patent
1989-08-29
1991-11-12
Halvosa, George E. A.
Brakes
Internal-resistance motion retarder
Magnetic fluid or material
188264R, 192 84PM, 192113A, 310105, B60L 728
Patent
active
050640291
ABSTRACT:
An eddy current retarder includes a rotor (3) fitted over a rotating shaft (1) at one end thereof and a support ring (7) around which a plurality of permanent magnets (10) are circumferentially provided in such a manner that the polarities of any adjacent magnets become opposite to each other. The support ring (7) is provided such that it is allowed to move back and forth in the axial direction of the rotating shaft (1) from a first position where the pole surfaces of the permanent magnets (10) fully confront the rotor (3) with a predetermined gap being secured therebetween to a second position where the former fully deviate from the latter. A boss portion (22) of the rotor (3) adapted to confront the permanent magnets (10) circumferentially provided around the support ring (7) and a cylindrical portion of the same are connected to each other by a support member (31), and this support member (31) comprises a fan (30) having axial blades (35) and radial blades (36) formed, respectively, radially inwardly and radially outwardly of the support member (31). Stator blades (37) are circumferentially provided close to the axial blades (35) on a bearing housing tube (4) fitted over the rotating shaft (1), and cooling fins (28) are radially provided on the external circumferential surface of the bearing housing tube (4) in such a manner as to protrude therefrom.
REFERENCES:
patent: 1924060 (1933-08-01), Huck
patent: 2771171 (1956-11-01), Schultz
patent: 3056895 (1962-10-01), Cohen et al.
patent: 3256823 (1966-06-01), Keyes
patent: 3413500 (1968-11-01), Gomez
patent: 4685202 (1987-08-01), Booth et al.
Araki Kenji
Kobayashi Takashi
Miyamae Jyunichi
Saito Akira
Halvosa George E. A.
Sumitomo Metal Industries Ltd.
Sumitomo Special Metals Co. Ltd.
LandOfFree
Eddy current retarder does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Eddy current retarder, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Eddy current retarder will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1007863