US4255874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lug sole for footwear
Assignee: Vibram SpA
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Filing: 1979-07-18
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Granted: 1981-03-17
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Expires: 1999-07-18
Abstract
Abstract A lug sole for footwear. The sole has integral downwardly extending legs located around the sole periphery. Some of the lugs are formed of the identical hard rubber composition as the body of the sole. The other lugs are formed of a softer rubber composition. The hard lugs and the soft lugs are disposed in a generally alternating arrangement.
Inventors
- 👤 Giuseppe Sironi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:58
CPC Classifications
A; A43; A43B; A43B13/00; A43B13/14; A43B13/22; A43B13/223
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
132 words
A sole comprising: a relatively hard sole body having a top surface adapted to be affixed to a mid-sole, said sole body also having a bottom surface, a plurality of downwardly extending, spaced apart first lugs integral with and located around a considerable portion of the periphery of said sole body bottom surface, said first lugs having the same hardness as said sole body, and a plurality of downwardly extending, a spaced-apart second lugs integral with and located around a considerable portion of the periphery of said sole body bottom surface, said second lugs disposed in a substantially alternating arrangement with said first lugs, said first and second lugs having the same height as measured from said bottom surface, with said second lugs being relatively soft in comparison to said first lugs.
Claim 2
Dependent Claim
132 words
A sole comprising: a relatively hard sole body having a top surface adapted to be affixed to a mid-sole, said sole body also having a bottom surface, a plurality of downwardly extending, spaced apart first lugs integral with and located around a considerable portion of the periphery of said sole body bottom surface, said first lugs having the same hardness as said sole body, and a plurality of downwardly extending, a spaced-apart second lugs integral with and located around a considerable portion of the periphery of said sole body bottom surface, said second lugs disposed in a substantially alternating arrangement with said first lugs, said first and second lugs having the same height as measured from said bottom surface, with said second lugs being relatively soft in comparison to said first lugs.
Claim 3
Dependent Claim
14 words
The sole of claim 1 wherein all said lugs are made of synthetic rubber.
Claim 4
Dependent Claim
23 words
The sole of claim 1 wherein said sole body is a one piece unit sole having a sole portion and a heel portion.
Claim 5
Dependent Claim
22 words
The sole of claim 1 wherein said sole body is a conventional sole having a sole portion and a thin heel-attaching portion.
Claim 6
Dependent Claim
26 words
The sole of claim 1 wherein a plurality of downwardly extending spaced-apart star-shaped portions is located in the approximate center of said sole body bottom surface.
Claim 7
Dependent Claim
18 words
The sole of claim 5 wherein said star-shaped portions have the same relative softness as said second lugs.
Claim 8
Dependent Claim
25 words
The sole of claim 1 wherein said first lugs are synthetic rubber and have a Shore A hardness of between about 80 and about 90.
Claim 9
Dependent Claim
24 words
The sole of claim 7 wherein said second lugs are synthetic rubber and have a Shore A hardness of between about 60 and 70.
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) | 1984-03-16 | 1984-09-15 | 1985-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-16 | 1988-09-15 | 1989-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-16 | 1992-09-15 | 1993-03-17 | $7700.00 | Window Closed / Lapsed |