US4694591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Toe off athletic shoe
Assignee: Brooks Sports Inc
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Filing: 1985-04-15
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Granted: 1987-09-22
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Expires: 2005-04-15
Abstract
Abstract An athletic shoe having a midsole subassembly formed of a lower layer and an upper layer, the lower layer having a rear higher density portion terminating short of the front end and integrally bonded with a lower density toe off pad portion into which the toes can sink during toe off. The upper layer extends beneath the heel and forwardly, terminating short of the toe area. This upper layer and the toe off pad have cooperative transverse grooves which are located relative to each other and to vertical flex grooves in the medial and lateral sides of the shoe upper, to enable the shoe to flex in a smooth curve with the foot. This upper layer has overlapping, laterally tapered wedge portions of different density and an integral, upstanding heel stabilizing cup, one portion from each wedge. The outsole has portions of different densities, the heel and ball portions of greater density for wear durability.
Inventors
- 👤 Howard P. Banich
- 👤 Daniel E. Norton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:12
CPC Classifications
A; A43; A43B; A43B13/00; A43B13/14; A43B13/18; A43B13/181; A43B13/02; A43B13/12; A43B5/00; A43B5/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
233 words
An athletic shoe having an outsole, an upper, and a midsole subassembly therebetween, said midsole subassembly comprising: a compressible layer having a rear portion extending forwardly from the rear of the shoe toward the toe of the shoe but terminating short of the front end of the shoe in a tapered front zone; said layer also having a highly compressible toe off pad with a tapered rear zone overlapping and bonded integrally with said tapered front zone; said toe off pad underlying the toe area of the shoe and having a density substantially less than that of said rear portion, and sufficiently low to allow the user's metatarsals to sink into said toe off pad during toe off action; said athletic shoe including a lower layer and an upper compressible layer bonded to said lower layer and extending forwardly from the rear of the shoe but terminating short of said toe off pad and wherein said upper layer is formed of overlying, laterally tapered wedge portions of different density, the wedge portion having a thicker edge on the medial side being of substantially greater density than that of the wedge portion having a thicker edge on the lateral side; and said upper layer having an integral, upstanding stability heel cup, the medial side of which is of said greater density material and the lateral side of which is of the lesser density material.
Claim 2
Dependent Claim
233 words
An athletic shoe having an outsole, an upper, and a midsole subassembly therebetween, said midsole subassembly comprising: a compressible layer having a rear portion extending forwardly from the rear of the shoe toward the toe of the shoe but terminating short of the front end of the shoe in a tapered front zone; said layer also having a highly compressible toe off pad with a tapered rear zone overlapping and bonded integrally with said tapered front zone; said toe off pad underlying the toe area of the shoe and having a density substantially less than that of said rear portion, and sufficiently low to allow the user's metatarsals to sink into said toe off pad during toe off action; said athletic shoe including a lower layer and an upper compressible layer bonded to said lower layer and extending forwardly from the rear of the shoe but terminating short of said toe off pad and wherein said upper layer is formed of overlying, laterally tapered wedge portions of different density, the wedge portion having a thicker edge on the medial side being of substantially greater density than that of the wedge portion having a thicker edge on the lateral side; and said upper layer having an integral, upstanding stability heel cup, the medial side of which is of said greater density material and the lateral side of which is of the lesser density material.
Claim 3
Dependent Claim
55 words
The shoe in claim 2 wherein said rear portion is about 35 durometer Shore A hardness, said toe portion is about 25 durometer Shore A hardness, said upper layer medial side wedge portion is about 45 durometer Shore A hardness, and said upper layer lateral side wedge portion is about 32 durometer Shore A hardness.
Claim 4
Dependent Claim
177 words
An athletic shoe having an outsole, an upper, and a midsole subassembly therebetween, said midsole subassembly comprising: a compressible layer having a rear portion extending forwardly from the rear of the shoe toward the toe of the shoe but terminating short of the front end of the shoe in a tapered front zone; said layer also having a highly compressible toe off pad with a tapered rear zone overlapping and bonded integrally with said tapered front zone; said toe off pad underlying the toe area of the shoe and having a density substantially less than that of said rear portion, and sufficiently low to allow the user s metatarsals to sink into said toe off pad during toe off action; said tapered front zone of said rear portion of said layer having transverse flex grooves, said toe off portion having transverse flex grooves, and said shoe upper having vertical flex grooves on both the lateral and medial sides thereof, all of said grooves being cooperatively located to enable the forepart of said shoe to smoothly, curvably flex.
Claim 5
Dependent Claim
177 words
An athletic shoe having an outsole, an upper, and a midsole subassembly therebetween, said midsole subassembly comprising: a compressible layer having a rear portion extending forwardly from the rear of the shoe toward the toe of the shoe but terminating short of the front end of the shoe in a tapered front zone; said layer also having a highly compressible toe off pad with a tapered rear zone overlapping and bonded integrally with said tapered front zone; said toe off pad underlying the toe area of the shoe and having a density substantially less than that of said rear portion, and sufficiently low to allow the user s metatarsals to sink into said toe off pad during toe off action; said tapered front zone of said rear portion of said layer having transverse flex grooves, said toe off portion having transverse flex grooves, and said shoe upper having vertical flex grooves on both the lateral and medial sides thereof, all of said grooves being cooperatively located to enable the forepart of said shoe to smoothly, curvably flex.
Claim 6
Dependent Claim
21 words
The athletic shoe in claim 3 wherein said front zone flex grooves are offset from said toe off pad flex grooves.
Claim 7
Dependent Claim
25 words
The athletic shoe in claim 3 wherein said toe off pad flex grooves are in the top and the bottom of said toe off pad.
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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) | 1990-09-21 | 1991-03-23 | 1991-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-21 | 1995-03-23 | 1995-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-21 | 1999-03-23 | 1999-09-22 | $7700.00 | Window Closed / Lapsed |