Boots – shoes – and leggings – Soles – Rope
Patent
1990-06-06
1992-01-14
Sewell, Paul T.
Boots, shoes, and leggings
Soles
Rope
36 28, A43B 1300
Patent
active
050798561
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The invention relates to a shoe sole manufactured of one or more pieces of a resilient material, such as plastics, natural or synthetic rubber.
BACKGROUND ART
European Publication No. 83449 A discloses a running shoe comprising a sole made of one piece of resilient material, where the rear portion of the heel is inclined and the heel includes a groove. As the heel is primarily supported by the circumference of the sole it cannot absorb all shocks opposite the correct position on the heel bone of the user.
FR-PS No. 2402425 discloses furthermore a shoe sole where the heel is provided with a knob. The knob provides no shock-absorption, and the heel per se is not a resilient portion.
DISCLOSURE OF INVENTION
The object of the invention is to provide a shoe sole of the above type which allows a better shock-absorption in the heel area than the previously known soles.
The shoe sole according to the invention is characterised in that a recess extends from below the heel and forward to the forefoot, said recess allowing only the longitudinal circumferential rims of the shoe sole below the heel to come into contact with the walking surface when the user of the shoe is standing on said walking surface, and that a shock-absorbing projection is provided in the recess opposite the heel bone of the foot, said projection only coming into contact with the walking surface at a high pressure load, such as when the user is walking or running, and not at a low pressure load. In this manner the shocks usually affecting the heel of the shoe when the user is walking or running are moved to the heel bone as well as absorbed in the best possible manner. The optimum absorption of shocks at usual pressure loads is achieved by the circumferential rim of the shoe sole absorbing the entire pressure load in the heel area, whereas the projection situated just below the heel bone of the foot provides the optimum non-shocking transfer of the shocks to the heel bone and consequently to the legs and spine of the user when the foot is subjected to maximum pressure loads.
An embodiment of the shoe sole according to the invention is characterised in that the projection forms part of the midsole, and that the projection extends through an opening or a rim recess in the outsole. As a result the most resilient and poorest wear-resisting material, i.e. the projection, comes last into contact with the walking surface, i.e. the ground, because most of the outsole and the longitudinal circumferential rim are manufactured in such a manner that a highly wear-resisting sole is achieved. The projection in the recess forms part of the soft midsole in order to provide the best possible walking comfort. If the heel part only included the projection and the material thereof, the shoe sole and consequently the entire shoe would have a very short life.
According to the invention the projection is substantially wedge-shaped when seen in the horizontal plane, i.e. preferably with a rounded front end and rear end, and the lower surface of the projection is substantially plane and forms a solid angle with the walking surface of between 10.degree. and -10.degree. when the shoe is not exposed to pressure. In this manner the projection and the walking surface come into contact with one another with their surfaces which ensures a minimum wear of the projection.
Furthermore the projection of the shoe sole may according to the invention be patterned on the lower surface, whereby the contact with the walking surface is improved.
In addition according to the invention a recess may encircle the projection, whereby a better resilience and a reduced shock-sensitivity than previously are achieved.
A further advantage of the shoe sole according to the invention is that the lower surface of the projection corresponds to 15-40%, preferably approximately 20%, of the projected area of the recess on the walking surface. According to the invention the recess may be asymmetrically situated relative to the walking direction and the longitudinal circumferential ri
REFERENCES:
patent: 3100354 (1963-08-01), Lombard et al.
patent: 4096649 (1978-06-01), Saurwein
patent: 4259792 (1981-04-01), Halberstadt
patent: 4521979 (1985-06-01), Blaser
patent: 4697361 (1987-10-01), Ganter et al.
patent: 4741114 (1988-05-01), Stubblefield
patent: 4785557 (1988-11-01), Kelley et al.
patent: 4918838 (1990-04-01), Chang
A/S Eccolet Sko
Cicconi Beth Anne
Sewell Paul T.
LandOfFree
Shoe sole does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Shoe sole, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Shoe sole will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-532364