Swing-type actuator

Details Swing-type actuator Swing-type actuator

1991-05-23

1992-11-17

Shepperd, John W.

Dynamic information storage or retrieval

Dynamic mechanism subsystem

Having power driven transducer assembly

G11B 555, G11B 2108, G11B 1730, G11B 2102

Patent

active

051650908

ABSTRACT:
A swing-type actuator has (a) a housing including a pair of yokes and a permanent magnet attached to at least one of the yokes opposing each other for defining a magnetic gap therebetween; and (b) a swingable arm having at one end a hold member encompassing a movable coil, such that the hold member and movable coil have essentially the same thickness and the movable coil is swingable in the magnetic gap, the arm and the hold member being integrally formed of a thermoplastic resin having a longitudinal modulus of 30.times.10.sup.4 kg/cm.sup.2 or more.

REFERENCES:
patent: 4150407 (1979-04-01), Dijkstra
patent: 4196456 (1980-04-01), Manzke et al.
patent: 4544973 (1985-10-01), Van De Bult
patent: 4553058 (1985-11-01), Iwasaki
patent: 4639624 (1987-01-01), Ejiri et al.
patent: 4849840 (1989-07-01), Fujioka
patent: 4855853 (1989-08-01), Matsushita et al.
patent: 4879617 (1989-11-01), Sampietro et al.
patent: 4949194 (1990-08-01), MacPherson et al.
patent: 4951023 (1990-08-01), Erd et al.
patent: 4985652 (1991-01-01), Oudet et al.
patent: 5034837 (1991-07-01), Schmitz

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