Patent US3676940A successfully refreshed from Google Patents.
US3676940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-slip apparatus
Assignee: Individual
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Filing: 1970-08-11
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Granted: 1972-07-18
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Expires: 1990-08-11
Abstract
Abstract A film or web of rubber or the like is formed with patterns of small closely spaced vacuum cups on each of its faces. When compressed between two surfaces, both of which are smooth, the cups of the two faces grip the two respective surfaces to restrain slippage, but due to the small size of the individual cups, local release is prompt as the area of applied pressure shifts. In applications such as bathing sandal soles or baseball bat grips, aligned cups of the two faces may be vented each to each, so that vacuum release on either face of the gripping element automatically releases the other face.
Inventors
- 👤 John J Shively
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:58
CPC Classifications
A; A43; A43B; A43B13/00; A43B13/14; A43B13/22; A43B13/223; A43B13/226; A43B5/00; A43B5/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
189 words
In apparatus for restraining relative slippage between opposing first and second surfaces, in combination, a thin web of resilient material adapted to be interposed between said surfaces, a first plurality of laterally adjacent miniature vacuum cups protruding in a closely spaced pattern from one face of said web for adherently engaging said first surface, a second plurality of miniature vacuum cups protruding from the other face of said web in a closely spaced pattern in direct back-to-back individual respective relationships with said cups of said first plurality and adapted to engage adherently said second surface in cooperational alignment with said adherent engagement of said first plurality of cups with said first surface, and means forming individual vents between cups of said first plurality and said respective back-to-back cups of said second plurality, and wherein each of said back-to-back pairs of cups comprises a relatively larger and a relatively smaller cup, said relatively larger and smaller cups being disposed alternatively in both said protruding patterns, said relatively larger cups occupying sideby-side relationship in their conjunctions with said web, whereby said web and cup combination may be rendered of minimum thickness.
Claim 2
Dependent Claim
189 words
In apparatus for restraining relative slippage between opposing first and second surfaces, in combination, a thin web of resilient material adapted to be interposed between said surfaces, a first plurality of laterally adjacent miniature vacuum cups protruding in a closely spaced pattern from one face of said web for adherently engaging said first surface, a second plurality of miniature vacuum cups protruding from the other face of said web in a closely spaced pattern in direct back-to-back individual respective relationships with said cups of said first plurality and adapted to engage adherently said second surface in cooperational alignment with said adherent engagement of said first plurality of cups with said first surface, and means forming individual vents between cups of said first plurality and said respective back-to-back cups of said second plurality, and wherein each of said back-to-back pairs of cups comprises a relatively larger and a relatively smaller cup, said relatively larger and smaller cups being disposed alternatively in both said protruding patterns, said relatively larger cups occupying sideby-side relationship in their conjunctions with said web, whereby said web and cup combination may be rendered of minimum thickness.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |