Expander

Details Expander Expander

1979-06-01

1981-05-19

Browne, William R.

Undertaking

272142, 272143, A63B 2102

Patent

active

042680328

ABSTRACT:
PCT No. PCT/CH78/00025 Sec. 371 Date June 5, 1979 Sec. 102(e) Date May 22, 1979 Pct Filed Oct. 3, 1977 PCT Pub. No. WO79/00181 PCT Pub. Date Apr. 19, 1979
An expander is described having a pair of substantially U-shaped actuating arms. Each of the arms have a pair of branches connected together forming at one end a U member. The U members comprise a first pair of transoms. The arms are pivotally connected together near the transoms. A second pair of transoms connecting the branches of each arm support resilient structure, the resilient structure maintaining a tension between each of the transoms of the second pair with transoms of the first pair, whereby respective arms are biased apart.

REFERENCES:
patent: 1680901 (1928-08-01), Meyer
patent: 2356260 (1944-08-01), Maxwell
patent: 2529347 (1950-11-01), Mohler et al.
patent: 3759512 (1973-09-01), Yount et al.
patent: 4023796 (1977-05-01), Kusmer

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