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US 4,447,969 AGranted
Boot for walking on soft materials
OwnerJames R. Johnsoninventor
Life of this patent
Estimating the term…
Abstract
A boot or a boot add-on for walking on sand, mud, snow, marshes, or other soft material with moveable wings that open to increase the surface area which prevents sinking into the soft material.
Claims4
A boot for walking on soft materials comprising:
- a. means for engaging and disengaging a boot or foot;
- b. an axle and/or stirrup;
- c. a lower bearing pin, a lower stop pin, a link, and an upper bearing block connecting the axle and/or stirrup to hinged wings;
- d. means to prevent fouling.
1 more element
Dependencies are inferred from the claim text.