Flexible hydraulic muscle

Details Flexible hydraulic muscle Flexible hydraulic muscle

Filed on

2004-06-23

Date issued

2009-11-17

Examiner

Lopez, F. Daniel (Department: 3745)

Patent Class

Expansible chamber devices

SubClass

Bellows type expansible chamber

SubSubClass

Plural bellows

Type

Reexamination Certificate

Status

active

Patent number

07617762

Description

ABSTRACT:
A flexible hydraulic muscle (20) comprising a fluid port (22), bellow (24), end seal (28) and attachment ring (30). Bellow (24) also defines a retracting spring bias for generating contracting forces within muscle (20). Fluid port (22) is designed to provide an anchor point for the muscle, while at the same time, providing a means to introduce and remove hydraulic fluid from bellow (24). End seal (28) and attachment ring (30) provide the second connecting point for the muscle. These two anchor points on each end of bellow (24) provide connection points to communicate contracting force from bellow (24) into useful work. End seal (28) is securely attached or bonded to the end of bellow (24) to provide a fluid tight seal, and designed to resist longitudinal forces on the connection.

REFERENCES:
patent: 2124735 (1938-07-01), Flint
patent: 2847032 (1958-08-01), Fleming
patent: 4502280 (1985-03-01), McCoy
patent: 4773218 (1988-09-01), Wakita et al.
patent: 5245885 (1993-09-01), Robertson
patent: 5261317 (1993-11-01), Fraser
patent: 2003/0098084 (2003-05-01), Ragner

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