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They Invented What? (No. 201)

Posted in They Invented What? by Jake Ward on May 4, 2011

U.S. Pat. No. 4,599,071:  Adjustable beach-shoes.

I claim:

1. An adjustable beach-shoe, comprising:

a platform with four straps adjustable in length secured thereon, including a peripheral wall projecting downwards with a recess defined thereby, having a front end and a rear end provided with a first cut-out and a second cut-out with similar shapes respectively, and two sides of said peripheral wall being provided with inward guiding grooves, a spring member mounted in said recess at the end thereof near the rear end of the platform, the spring member providing a biasing force in a direction toward said front end, and a plurality of projections provided with respect to said front end;

a web member including a tubular portion having two ends, a pair of spring-loaded pins mounted on said two ends respectively, a metal plate secured longitudinally to the tubular portion and having an upper surface and a lower surface, a pair of packing pieces attached to said upper surface and said lower surface of said metal plate respectively, a plurality of elastic threads secured to said tubular portion and extended in a direction opposite to said metal plate, a plastic membrane extended over a surface including said elastic threads, said web member being movable forwards and backwards within said recess with the sliding of said spring-loaded pins along said inside guiding grooves when said web member is mounted in said recess;

a sole member mounted on said platform to cover said recess; and

a guard piece contoured complementarily with each of said first and second cut-outs and provided with slits for engaging with said projections of said platform, the guard piece for the first cut-out being adapted to fit in said first cut-out when said web member is entirely received in said recess to provide a beach-shoe.