Process for reducing the internal cross section of elastomeric t

Details Process for reducing the internal cross section of elastomeric t Process for reducing the internal cross section of elastomeric t

1991-01-14

1992-05-19

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

264230, 264235, 264320, 264339, 264DIG41, B29C 5308, B29C 5320

Patent

active

051146363

ABSTRACT:
A hydraulic or pneumatically actuated muscle has an elongated elastomeric tubular bladder covered by a tubular braid. The bladder has a fold or invagination along its length. The process for forming this bladder can employ a fixture in the form of a threaded rod. A tubular elastomer is wrapped into the v-shaped thread on the rod. Then the wrapped rod is subjected to heat to set a fold into the tubing. The invaginate bladder can be subjected to a second, mild heat treatment to reduce curling.

REFERENCES:
patent: 4950258 (1990-08-01), Kawai et al.

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