Patent US2146775A successfully refreshed from Google Patents.
US4525941A
Expired / Lapsed
US
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Mud walker
Assignee: Individual
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Filing: 1984-01-20
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Granted: 1985-07-02
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Expires: 2004-01-20
Abstract
Abstract A platform is supported around the periphery of its under surface by a pneumatic tube cushion secured to the platform by strap loops. The top side of the platform is equipped with adjustable means of securement to the shoe or boot of the user. Vent holes in mid portions of the platform prevent suction effects under the platform when the foot is lifted. The device is collapsible into a compact package for shipment or storage.
Inventors
- 👤 George F. Ruth, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:49
CPC Classifications
A; A43; A43B; A43B5/00; A43B5/18; A63; A63C; A63C2203/00; A63C2203/16
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
118 words
A mud walker comprising a platform, an elliptical flexible compressed air tube supporting only marginal portions of said platform, an air connection for inflating said tube with compressed air, a flexible and inelastic protective covering on said compressed air tube, means securing said compressed air tube and covering to said marginal portions of the underside of said platform leaving an open space under the center of the platform, air vent holes in said central portion of said platform spaced away from said compressed air tube and communicating with said open space under the platform, baffles spaced above said air vent holes, and means on the upper side of said platform for attachment to the foot of a wearer.
Claim 2
Dependent Claim
118 words
A mud walker comprising a platform, an elliptical flexible compressed air tube supporting only marginal portions of said platform, an air connection for inflating said tube with compressed air, a flexible and inelastic protective covering on said compressed air tube, means securing said compressed air tube and covering to said marginal portions of the underside of said platform leaving an open space under the center of the platform, air vent holes in said central portion of said platform spaced away from said compressed air tube and communicating with said open space under the platform, baffles spaced above said air vent holes, and means on the upper side of said platform for attachment to the foot of a wearer.
Claim 3
Dependent Claim
28 words
A mud walker as defined in claim 1, said means securing said compressed air tube and covering to said platform comprising straps passing through holes in said platform.
Claim 4
Dependent Claim
32 words
A mud walker as defined in claim 2, said straps and said compressed air tube and covering being removable from said platform and said covering being removable from said compressed air tube.
Claim 5
Dependent Claim
32 words
A mud walker as defined in claim 1, said attachment means comprising toe and heel securement means to hold the toe and heel portions of the wearer's foot firmly against said platform.
Claim 6
Dependent Claim
36 words
A mud walker as defined in claim 1, said toe securement means comprising a pair of flexible wings extending upward from said platform, and strapping interconnecting said wings across said toe portion of the wearer's foot.
Claim 7
Dependent Claim
66 words
A mud walker as defined in claim 4, said heel securement means comprising a flexible rear heel wing extending upward from said platform, a pair of flexible side heel wings connected to opposite side edges of said rear wing, strapping fastening and guide means on said wings, and strapping in said fastening and guide means to cross over the instep and ankle of the wearer's foot.
Claim 8
Dependent Claim
18 words
A mud walker as defined in claim 6 including cushion material on the inside surfaces of said wings.
Claim 9
Dependent Claim
18 words
A mud walker as defined in claim 6 including foot length adjustment means for said heel securement means.
Claim 10
Dependent Claim
50 words
A mud walker as defined in claim 8, said adjustment means comprising a pair of guides on said platform, an adjustment plate slidable in said guides, means to secure said plate in adjusted position, and means to fasten the lower end of said rear heel wing to said adjustment plate.
Claim 11
Dependent Claim
14 words
A mud walker as defined in claim 1 said platform comprising a plywood panel.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-01 | 1988-12-31 | 1989-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-01 | 1992-12-31 | 1993-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-01 | 1996-12-31 | 1997-07-02 | $7700.00 | Window Closed / Lapsed |