Durable slings for vehicle frame turnover machines and method of making the slings

• US 6,149,215 A
• Filed: 07/06/1999
• Issued: 11/21/2000
• Est. Priority Date: 07/07/1998
• Status: Expired due to Fees

• Current Assignee: DP Brown Of Detroit Incorporated
• Original Assignee: DP Brown Of Detroit Incorporated
• Inventors: Balogh, Dennis J., Murlick, William D.
• Primary Examiner(s): Kramer, Dean J.
• Application Number:
  US09/348,087
• Time in Patent Office: 504 Days
• Field of Search: 294/74, 57/210, 57/211, 57/223, 57/235, 57/241, 57/258
• US Class Current: 294/74
• CPC Class Codes: B66C 1/18 Band-type slings
• CPC Class Codes: C07D 219/06 Oxygen atoms
• CPC Class Codes: C07D 311/86 Oxygen atoms, e.g. xanthones
• CPC Class Codes: C07D 491/04 Ortho-condensed systems

Abstract

The webbing sling has a woven nylon webbing member with a top surface, a bottom surface, a first webbing side, a second webbing side, a first eye on one end and a second eye on the other end. A strip of abrasion resistant woven material with a high coefficient of friction is sewn to the top surface of the woven nylon webbing. A liquid urethane is applied to the top surface, the first webbing side and the second webbing side between the first and second eyes. The upper face of the strip of abrasion resistant material is free of urethane. Both eyes are covered by woven abrasion resistant covers that are sewn to the woven nylon webbing and then covered by urethane.

Claims

1. A webbing sling comprising a woven nylon webbing with a first end, a second end, a top surface, a button surface, a first webbing side and a second webbing side;

a first abrasion resistant cover encasing a first tongue portion adjacent to the first end and sewn to said woven nylon webbing;

a first eye formed by folding the first tongue portion and the first abrasion resistant cover and sewing the first end to said woven nylon webbing;

a second abrasion resistant cover encasing a second tongue portion adjacent to the second end and sewn to said woven nylon webbing;

a second eye formed by folding the second tongue portion and the second abrasion resistant cover and sewing the second end to said woven nylon webbing;

a strip of woven material with an abrasion resistant surface, a first strip side and a second strip side sewn to the top surface of said woven nylon webbing;

a urethane cover that adheres to the top surface of said woven nylon webbing, to the first webbing side of said woven nylon webbing, and to the second webbing side of said woven nylon webbing and that leaves at least a portion of the abrasion resistant surface of said strip of woven material exposed.

2. A webbing sling as set forth in claim 1 wherein the first tongue portion includes a first section with the first webbing side and the second webbing side folded inward toward each other and sewn in place;

and

wherein the second tongue portion includes a second section with the first webbing side and the second webbing side folded inward toward each other and sewn in place.

3. A webbing sling as set forth in claim 2 wherein the first section of the first tongue portion passes through a first metal connector and the second section of the second tongue portion passes through a second metal connector.

4. A webbing sling as set forth in claim 1 wherein said strip of woven material with an abrasion resistant surface is blue carboxalated nitrile rough top.

5. A webbing sling as set forth in claim 1 wherein the first eye and the second eye are encased in urethane.

6. A webbing sling as set forth in claim 1 wherein the first abrasion resistant cover and the second abrasion resistant cover are tubes.

7. A webbing sling as set forth in claim 6 wherein the first abrasion resistant cover and the second abrasion resistant cover are woven from tough durable fibers.

8. A webbing sling comprising a woven nylon webbing with a top surface, a bottom surface, a first webbing side, a second webbing side, a first eye formed on a first end of the woven nylon webbing and a second eye formed on a second end of the woven nylon webbing;

a strip of blue carboxalated nitrile rough top sewn to the top surface of the woven nylon webbing with a first portion of the top surface of the woven nylon webbing exposed between said strip and the first webbing side and a second portion of the top surface of the woven nylon webbing exposed between said strip and the second webbing side; and

a urethane cover applied to the first portion of the top surface and the first webbing side and to the second portion of the top surface and the second webbing side by applying liquid urethane and allowing the urethane to cure.

9. A webbing sling as set forth in claim 8 wherein the cured urethane is translucent.

10. A webbing sling as set forth in claim 8 wherein the urethane is applied to the first webbing side, the second webbing side, the first eye, the second eye and all of the top surface of the woven nylon webbing that remains exposed after the strip of blue carboxalated nitrile rough top is sewn to said top surface.

11. A webbing sling as set forth in claim 10 wherein the strip of blue carboxalated nitrile has a first side, a second side, a first end and a second end that are substantially covered and protected by the urethane.

12. A method of making a webbing sling comprising:

cutting a woven nylon webbing to the desired length;

forming a first eye on a first end of the woven nylon webbing;

forming a second eye on a second end of the woven nylon webbing;

sewing a strip of woven material with an abrasion resistant rough top surface to a top surface of the woven nylon webbing;

placing a portion of the woven nylon webbing between the first eye and the second eye in a mold with the top surface of the woven nylon webbing facing upward;

pouring liquid urethane into the mold and covering all of the webbing sling in the mold but the abrasion resistant rough top surface of the strip of woven material; and

curing the liquid urethane.

13. A method of making a webbing sling as set forth in claim 12 including:

covering the first eye with a first abrasion resistant cover and sewing the first abrasion resistant cover to the woven nylon webbing; and

covering the second eye with a second abrasion resistant cover and sewing the second abrasion resistant cover to the woven nylon webbing.

14. A method of making a webbing sling as set forth in claim 13 including:

applying a liquid urethane to the first abrasion resistant cover and to the second abrasion resistant cover; and

permitting the urethane to cure.

15. A method of making a webbing sling as set forth in claim 12 including:

folding a first edge and a second edge of a first tongue portion of the first eye inward toward each other and sewing the folded first edge and second edge of the first tongue portion of the first eye to the woven nylon webbing; and

folding a first edge and a second edge of a second tongue portion of the second eye inward toward each other and sewing the folded first edge and the folded second edge of the second tongue portion of the second eye to the woven nylon webbing.

16. A method of making a webbing sling as set forth in the claim 15 including:

covering the first eye with a first abrasion resistant fabric sleeve and sewing the first abrasion resistant fabric sleeve to first tongue portion of the first eye; and

covering the second eye with a second abrasion resistant fabric sleeve and sewing the second abrasion resistant fabric sleeve to the second tongue portion of the second eye.

17. A method of making a webbing sling as set forth in claim 16 including:

applying a first liquid urethane coating to the first abrasion resistant sleeve; and

applying a second liquid urethane coating to the second abrasion resistant sleeve.