Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1977-01-11
1978-11-07
Hornsby, Harvey C.
Winding, tensioning, or guiding
Coil holder or support
Spool or core
B65H 7518
Patent
active
041241738
ABSTRACT:
This invention pertains to an expanding mandrel or chuck in which air or hydraulic fluid is fed to and into a resilient tube arranged either in a helical or longitudinal manner. This application particularly pertains to an expanding outer sleeve as shown in my U.S. Pat. No. 3,937,412 as issued on Feb. 10, 1976 which is an improvement upon my U.S. Pat. No. 3,917,187 as issued on Nov. 4, 1975. In the improved leaf construction of this application a plurality of leaf-like members is linked so as to be maintained in a complete circle without displacement therefrom or expansion beyond a determined limit. Each leaf-like member has one longitudinal edge formed with a keyhole-type groove and the other edge formed with the tongue member having an enlarged outer portion which slidably fits into this groove. In an assembled condition the tongue member of one leaf is mounted in the keyhole groove of the next adjacent leaf. This keyhole-type groove arrangement and mating tongue provide a safety means to the expansion. In order to retain and move these leaf members in their desired inner limit circumferential grooves are cut into the outer surface of these leaf members after they have been assembled. Garter springs or rubber O-rings are mounted in these grooves to urge the leaf members into the inner condition. The expanding tube may be protected by a rubber strip or channel which fits into the groove and prevents tube contact with the leaf-like members.
REFERENCES:
patent: 2145806 (1939-01-01), Schnedarek
patent: 3025072 (1962-03-01), Cahill
patent: 3552673 (1971-01-01), Evers
patent: 3823892 (1974-07-01), Glaser
patent: 3878999 (1975-04-01), Daves
patent: 3917187 (1975-11-01), Damour
patent: 3937412 (1976-02-01), Damour
Hornsby Harvey C.
Jillions John M.
Roberts Ralph R.
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