Magnetic seal for magnetic particle clutches and brakes

Details Magnetic seal for magnetic particle clutches and brakes Magnetic seal for magnetic particle clutches and brakes

1984-04-09

1986-03-11

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277135, F16J 1540

Patent

active

045751030

ABSTRACT:
A novel seal for a magnetic particle brake or clutch of the type having a rotatable shaft made of a non-magnetic material. The seal comprises (a) one or more permanent magnets adapted to be mounted in close proximity to but not engaging the adjacent surface of the rotatable shaft or a movable member that is exposed to the magnetic particles, and (b) means for mounting the one or more magnets and protecting them from excessive external magnetic fields.

REFERENCES:
patent: 2713927 (1955-07-01), Rabinow
patent: 2834618 (1958-05-01), Wiltse
patent: 2863538 (1958-12-01), Jaeschke
patent: 2974981 (1961-03-01), Vervest et al.
patent: 2987153 (1961-06-01), Perry
patent: 2996162 (1961-08-01), Lehde
patent: 3254745 (1966-06-01), Isakov et al.
patent: 3834775 (1974-09-01), Tuffias et al.
patent: 4077508 (1978-03-01), Pedersen
patent: 4171818 (1979-10-01), Moskowitz et al.
patent: 4252353 (1981-02-01), Raj et al.
patent: 4315827 (1982-02-01), Bottenberg et al.

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