IP Library Granted Patent US 10,004,294
Granted Patent B2
US 10,004,294 · App. 14/547,674 · Granted Jun 26, 2018

Slip resistant soles and footwear

Inventors: Jonathan Swegle (West Chester, PA); Salvatore P. Agati (Kennett Square, PA); Ann B. Lashendock (Coatesville, PA)
Assignee: DANSKO, LLC
A43B13/223A43B3/0036A43B3/0078A43B13/14A43B13/22
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Quick Facts
Patent No.
US 10,004,294
App. No.
14/547,674
Granted
Jun 26, 2018
Kind
B2
Abstract

A shoe including a slip resistant sole having a bottom face, wherein the sole includes a plurality of arcuate-shaped lugs having non-linear edges, each lug including an inner arc and an outer arc, wherein the outer arc is a convex side and the inner arc is a concave side shorter than the convex side, and each lug includes a groove transecting the lug, wherein the lugs are arranged into a pinwheel pattern group that includes three of the lugs, wherein the bottom face of the sole includes a plurality of the pinwheel pattern groups, and wherein each of the pinwheel pattern groups is radially symmetrical and bilaterally asymmetrical.

Claims (31)

1. A shoe comprising:

a slip resistant sole having a bottom face, wherein said sole comprises a plurality of arcuate-shaped lugs having non-linear edges, each lug comprising an inner arc and an outer arc;

wherein the outer arc is a convex side and the inner arc is a concave side shorter than the convex side;

wherein each lug includes a groove transecting the lug;

wherein the lugs are arranged into a pinwheel pattern group that comprises three of the lugs, wherein the bottom face of said sole comprises a plurality of the pinwheel pattern groups; and

wherein each of the pinwheel pattern groups is radially symmetrical and bilaterally asymmetrical.

2. The shoe of claim 1 , wherein each lug comprises a narrow end and a bulbous end, wherein the bulbous end is centrally aligned with the inner arc of another one of the lugs in the respective pinwheel pattern group, so as to define a pinwheel shape for the pinwheel pattern group.

3. The shoe of claim 1 , wherein said plurality of pinwheel pattern groups are disposed on each of a toe portion of the shoe and a heel portion of the shoe.

4. The shoe of claim 1 , wherein the groove in each lug extends to the bottom face of the sole, such that the lug comprises two parts, the two parts including a narrow part and a bulbous part separated from one another by the groove.

5. The shoe of claim 1 , wherein the groove in each lug extends 9-99% of a height of the respective lug.

6. The shoe of claim 1 , wherein said plurality of lugs are manufactured from one of the following materials: synthetic rubbers, natural rubbers, ethylene-vinyl acetate copolymers, polyurethane, polyvinyl chloride, polybutadiene rubbers, polyisoprene rubbers, styrene-butadiene rubbers acrylonitrile butadiene rubbers, nitrile rubbers, ethylene propylene rubbers, ethylene-vinyl acetate copolymer rubber, polyamide rubbers, polyether, polyester, polyurea-urethane, epichlorohydrin, silicon and polysulfide rubbers, or combinations thereof.

7. The shoe of claim 1 , wherein said plurality of lugs have a hardness of 57 Shore A or less.

8. The shoe of claim 1 , wherein said plurality of lugs have a density of 1.20 g/cm 3 or less.

9. A shoe comprising:

a slip resistant sole, the sole having a bottom, the bottom having a pattern comprising:

a plurality of arcuate-shaped lugs, each lug having a narrow end and a bulbous end, wherein said narrow end and said bulbous end are separated from one another by a groove, and each lug comprises an inner arc and an outer arc;

wherein the outer arc is a convex side and the inner arc is a concave side shorter than the convex side;

wherein said plurality of lugs are organized such that three of the lugs are arranged in a pinwheel pattern group, wherein the bulbous ends are proximate to a center of the pinwheel pattern group;

wherein a plurality of the pinwheel pattern groups are disposed on the bottom of said sole; and

wherein each of the pinwheel pattern groups is radially symmetrical and bilaterally asymmetrical.

10. The shoe of claim 9 , wherein said plurality of lugs are manufactured from one of the following materials: synthetic rubbers, natural rubbers, ethylene-vinyl acetate copolymers, polyurethane, polyvinyl chloride, polybutadiene rubbers, polyisoprene rubbers, styrene-butadiene rubbers acrylonitrile butadiene rubbers, nitrile rubbers, ethylene propylene rubbers, ethylene-vinyl acetate copolymer rubber, polyamide rubbers, polyether, polyester, polyurea-urethane, epichlorohydrin, silicon and polysulfide rubbers, or combinations thereof.

11. The shoe of claim 9 wherein the plurality of lugs have a hardness of 57 Shore A or less and a density of 1.20 g/cm 3 or less.

12. A slip resistant sole comprising:

a plurality of pinwheel lug groups, wherein each of said pinwheel lug groups comprises three pairs of arcuate-shaped lugs;

wherein each of the pairs of lugs has an arcuate shape comprising an inner arc and an outer arc;

wherein the outer arc is a convex side and the inner arc is a concave side shorter than the convex side, and each of the pairs of lugs comprises a narrow lug and a bulbous lug having a groove disposed between the narrow lug and the bulbous lug and each of the lugs has a degree of sharpness of between 0-33 degrees;

wherein said three lug pairs are arranged such that said bulbous lugs are centrally situated in the respective pinwheel lug group and the narrow lugs are radially aligned away from a center of the respective pinwheel lug group, thereby defining a pinwheel shape for the pinwheel lug group; and

wherein each of the pinwheel lug groups is radially symmetrical and bilaterally asymmetrical.

13. The slip resistant sole of claim 12 , wherein said plurality of pinwheel lug groups are arranged in a repeating manner on said sole.

14. The slip resistant sole of claim 12 , wherein said degree of sharpness is between 0-16.5 degrees.

15. The slip resistant sole of claim 12 , wherein said plurality of lugs have a hardness of 57 Shore A or less and a density of 1.20 g/cm 3 or less.

Assignments (2)
SECURITY INTEREST Recorded Apr 27, 2018
From: DANSKO, LLC
To: BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 045657/0117 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 9, 2015
From: SWEGLE, JONATHAN; AGATI, SALVATORE P.; LASHENDOCK, ANN B.
To: DANSKO, LLC
Reel/Frame 034676/0361 →
Continuity (2)
Provisional Application 61903253 · Nov 12, 2013
Related Publication 20160000183A1 · Jan 7, 2016
Cited By (5)
US 12,201,185 US 12,302,990 US 12,495,863 US 12,543,819 US 12,550,969