Expansible mandrel with a plurality of expansion devices

Details Expansible mandrel with a plurality of expansion devices Expansible mandrel with a plurality of expansion devices

1979-10-12

1988-09-20

Hershkovitz, Abraham

Winding, tensioning, or guiding

Coil holder or support

Spool or core

92 48, 92 92, 279 2A, B65H 7524

Patent

active

047719630

ABSTRACT:
An expansible mandrel with a plurality of fluid pressure actuated expansion devices, the devices including an expandable pressing shoe member, an inflatable tubular bladder member cooperating with said shoe member for actuating the expansion movement thereof and duct and valve means connectable with pressure fluid ducts for conducting and controlling the pressure fluid flow in and out of said bladder member. A channel section shaped housing member contains therein the shoe member and the bladder member and a connector member. The housing with therein the bladder member and the shoe member and the connector member constitutes a self-contained replaceable expansion device unit.

REFERENCES:
patent: 3214109 (1965-10-01), Gadde
patent: 3233341 (1965-12-01), Gadde
patent: 3286987 (1966-11-01), Bridges
patent: 3493189 (1970-02-01), Seay
patent: 3552672 (1971-01-01), Grettve
patent: 3592405 (1971-07-01), Young
patent: 3904144 (1975-09-01), Gattrugeri
patent: 4147312 (1979-04-01), Secor

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