Evacuation spring for hydraulic/pneumatic muscle

Details Evacuation spring for hydraulic/pneumatic muscle Evacuation spring for hydraulic/pneumatic muscle

1990-03-22

1991-07-16

Kwon, John T.

Expansible chamber devices

Collapsible chamber wall portion

Wall portion formed of flexible material

92 94, 92132, 92130A, 128 4, 403316, 403341, F01B 1904

Patent

active

050315102

ABSTRACT:
A hydraulically or pneumatically actuated muscle has an elongated elastomeric bladder that is covered by a tubular sheath. A fluid conduit is coupled to the bladder to supply hydraulic or pneumatic pressure. A coil tension spring is attached to a distal terminator of the muscle and extends to the distal end of a compression tube covering the bladder and braid. The evacuation spring draws the braid and bladder towards their fully extended state when fluid pressure is relieved and ellshaped retaining pin in the muscle terminator has one end that extends radially outward to lodge between turns of the evacuation spring. Split shoulder washers secure the proximal and distal ends of the compression tube.

REFERENCES:
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patent: 2399133 (1946-04-01), Midling
patent: 2483088 (1946-09-01), DeHaven
patent: 3861814 (1975-01-01), Fisher
patent: 4571788 (1986-02-01), Bruengger
patent: 4645373 (1987-02-01), Purdy
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patent: 4794912 (1989-01-01), Lia
patent: 4841845 (1989-06-01), Beullens
patent: 4865017 (1989-09-01), Shinozuka
patent: 4962751 (1990-10-01), Krauter

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