Lever-type frictional resistance force variable system

Spring devices – Resilient shock or vibration absorber

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Details

248550, 521671, 521673, 188134, E04H 902

Patent

active

059156767

ABSTRACT:
The present invention provides a lever-type frictional resistance force variable system comprising an arm whose upper end is rotatably supported by an upper beam; a supporting member which is fixed to a lower beam to rotatably support the intermediate portion of the arm; a braking device having frictional resistance plates connected to the lower end side of the arm, frictional pads provided between the frictional resistance plates, a pressing pad, and a screw rod; a turning lever connected to the screw rod; a ball screw threadedly engaging with the turning lever; a servomotor for rotating the ball screw; a displacement sensor for detecting a displacement of a frame; and a control unit for determining a braking force to be generated by the braking device based on the detected value of the displacement sensor and outputting a control signal according to the determined braking force.

REFERENCES:
patent: 2764260 (1956-09-01), Fleischman
patent: 4265467 (1981-05-01), Aleck
patent: 4371141 (1983-02-01), Baratoff
patent: 4513846 (1985-04-01), Yajima
patent: 4763869 (1988-08-01), Nakamura et al.
patent: 4941640 (1990-07-01), Nakamura et al.
patent: 5303524 (1994-04-01), Caspe
patent: 5727663 (1998-03-01), Tayla
patent: 5775469 (1998-07-01), Kang

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