Shoe sole incorporating spring apparatus

Details Shoe sole incorporating spring apparatus Shoe sole incorporating spring apparatus

1989-04-24

1990-03-27

Sewell, Paul T.

Boots, shoes, and leggings

Soles

Cushion

36 27, A43B 1318

Patent

active

049108840

ABSTRACT:
The shoe sole incorporating spring apparatus comprises a shoe sole with a cavity in its upper side, the planform of the cavity being essentially that of the foot of a wearer of a shoe incorporating the sole. Two elliptical springs are situated entirely in the cavity, one spring located under the heel of the user, termed the heel spring, the other under the ball of the user's foot, termed the toe spring. The springs are contoured in planform to fit snugly but freely in the cavity. A flexible bridge piece fits over the springs. The planform of the bridge conforms closely to that of the cavity, allowing free motion of the bridge to the cavity. The springs and bridge are made of acetal plastic. The spring rates of the springs are attuned to the weight of the wearer, reaching full deflection under forces which are a factor times the weight of the wearer. The factor ranges from 1 to 4 with 3 being a preferred factor for the heel spring and 1.5 being a preferred factor for the toe spring in a walking shoe and 3 in a shoe intended for more vigorous use.

REFERENCES:
patent: 4592153 (1986-06-01), Jacinto
patent: 4638575 (1987-01-01), Illustrato
patent: 4843737 (1989-07-01), Vorderer

Affiliated with

Also associated with

Rating

Shoe sole incorporating spring apparatus 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 incorporating spring apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Shoe sole incorporating spring apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1641537