Title: Insole for rock climbing shoe

Abstract: An insole, for a rock climbing shoe, formed of a single piece of synthetic plastic material to follow the anatomical shape of the wearer's foot, including a first portion of constant thickness in the longitudinal direction from the heel for a predetermined distance, and a second portion extending in prolongation of the first portion and being of linearly decreasing thickness down to a minimum value at the toe of the insole, so that the insole displays a differential flexibility in the longitudinal direction, with a maximum of flexibility near the toe.

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Inventors: Vello, Francesco (Venegazzu (Treviso), IT)

Application Number: 768848
Filing Date: 1977-02-15
Publication_date: 1978-01-31
Assignee: Red Wing Shoe Company, Inc. (Red Wing, MN)
Primary Class(es): 36/43
Other Classes:
US Patent Ref:

1807341	May, 1931	Messler	36/44.
2403329	Dec, 1947	Adler et al.	36/44.
2581864	Jan, 1952	Kaufmann	36/44.
2635363	Apr, 1953	Dorgin	36/43.
3426455	Feb, 1969	Drago	36/44.

Other Refs: 658,875580,5761,918,537

May, 1965	BE
Aug, 1959	CA
Jul, 1971	DT

Primary Examiner: Guest, Alfred R.
Assistant Examiner:
Attorney: