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US 4,907,351 AGranted
Heel device for shoes
OwnerGiichi Hiraiinventor
Life of this patent
Estimating the term…
Abstract
A heel device for shoes having a heel and a heel lift detachably attached to the heel. An insertion hole is formed longitudinally at the heel, and an inserting rod of the shape corresponding to that of the insertion hole is stood on the heel lift. The inserting rod is detachably inserted into the insertion hole of the heel to attach or detach the heel lift to or from the heel. The inserting rod is rigidly held by a clamping member formed of a material having expansible and contractible properties and strong frictional force.
Claims4
A heel device for shoes having a heel and a heel lift detachably attached to said heel comprising:
- an insertion hole formed from the bottom face of said heel with a large-diameter portion formed in the lower portion thereof and a substantially lateral semicircular cross-section in the upper portion thereof of said heel,
- a ring engaged with the large-diameter portion of said insertion hole,
- a clamping member having expansible and contractible properties to be engaged within said ring and formed of a material having strong frictional force, and
- an inserting rod of the shape corresponding to that of said insertion hole to be inserted into said insertion hole of said heel and stood on said heel lift.
1 more element
Dependencies are inferred from the claim text.