Pneumatic, expandible shaft with keys

Details Pneumatic, expandible shaft with keys Pneumatic, expandible shaft with keys

1981-11-02

1984-09-25

Levy, Stuart S.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

279 2A, B65H 7524, B23B 3116

Patent

active

044731957

ABSTRACT:
A pneumatic expandable shaft having lugs suitable for blocking bobbins mounted on the shaft is described. The shaft comprises in the interior a tube (7) made of resilient material, the tube communicating with the exterior by means of valves (6-15). The valves permit the inflation of the tube by means of compressed air. The shaft has along its surface openings for the passage of lugs (2), the lugs being pushed outwardly under the pneumatic force of the tube (7). When the tube is deflated, the lugs are brought back to their position in the interior of the shaft by the action of springs (14).

REFERENCES:
patent: 3006152 (1961-10-01), Rusche
patent: 3048345 (1962-08-01), Willard
patent: 3391878 (1968-07-01), Naccara
patent: 3945583 (1976-03-01), Ochs et al.
patent: 4147312 (1979-04-01), Secor et al.
patent: 4229014 (1980-10-01), Crowe

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