James A Lefgren

US Patent:

7695078, Apr 13, 2010

Filed:

Mar 11, 2008

Appl. No.:

12/046444

Inventors:

James Lefgren - Richmond UT, US

International Classification:

B65G 15/44
A43B 5/00

US Classification:

305180, 305160, 152210, 36127

Abstract:

The present invention provides a traction device for a terrain engaging element. The traction device defines a stud having a head portion and a shank portion extending from the head portion and adapted to be secured into the terrain engaging element. A plurality of spherical carbide pellets are bonded together on and to surfaces of the head. The carbide pellets are provided in multiple layers extending across the head surface. The carbide pellets are provided in a stacked relationship to each other so that during use the carbide pellets are capable of being individually dislodged to reveal a carbide pellet of an underlying layer.

US Patent:

D659223, May 8, 2012

Filed:

Sep 28, 2011

Appl. No.:

29/402850

Inventors:

James Lefgren - Richmond UT, US
Travis Hendrickson - Bear River City UT, US

International Classification:

2205

US Classification:

D22147

US Patent:

D692646, Nov 5, 2013

Filed:

Jan 26, 2012

Appl. No.:

29/411783

Inventors:

James Lefgren - Richmond UT, US
Travis L. Hendrickson - Bear River City UT, US

International Classification:

0299

US Classification:

D 2962

US Patent:

20050269878, Dec 8, 2005

Filed:

Mar 21, 2005

Appl. No.:

11/086089

Inventors:

James Lefgren - Richmond UT, US

International Classification:

B65G015/44

US Classification:

305180000

Abstract:

The present invention provides a traction device for a terrain engaging element. The traction device defines a stud having a head portion and a shank portion extending from the head portion and adapted to be secured into the terrain engaging element. A plurality of generally equally-sized carbide pellets are bonded together on and to the upper surface of the head. The carbide pellets are provided in multiple layers extending across the upper surface of the head. The carbide pellets may be provided in a stacked relationship to each other so that during use the carbide pellets are capable of being individually dislodged to reveal a carbide pellet of an underlying layer.

US Patent:

20100293818, Nov 25, 2010

Filed:

Apr 13, 2010

Appl. No.:

12/759697

Inventors:

James Lefgren - Richmond UT, US

International Classification:

A43C 15/02
B32B 3/06
B32B 5/16
B32B 3/26

US Classification:

36 59 R, 428 99, 428323, 4283128

Abstract:

The present invention provides a traction device for a terrain engaging element. The traction device defines a stud having a head portion and a shank portion extending from the head portion and adapted to be secured into the terrain engaging element. A plurality of carbide pellets are bonded together on and to surfaces of the head. The carbide pellets are provided in multiple layers extending across the head surface. The carbide pellets are provided in a stacked relationship to each other so that during use the carbide pellets are capable of being individually dislodged to reveal a carbide pellet of an underlying layer.

US Patent:

40195538, Apr 26, 1977

Filed:

Dec 24, 1975

Appl. No.:

5/644099

Inventors:

James I. Lefgren - Smithfield UT

International Classification:

B60C 2500

US Classification:

157 11

Abstract:

A tubeless tire to be mounted is placed on a wheel rim so that a side-wall bead of the tire is in contact with the adjacent wheel rim flange. A plastic, water soluble substance of doughy consistency is then placed in the gap between the opposite side-wall bead and its adjacent wheel rim flange to form an airtight seal. Air is then introduced into the tire in the conventional manner through the wheel rim valve until desired inflation is achieved. During inflation, the plastic substance is expelled and may be manually removed and/or washed off with water. In the case of large tires, wherein the gap between the side-wall bead and its adjacent wheel rim flange is large, the quantity of the plastic substance used is minimized by first inserting a flexible annulus, such as an inflated tube, into the gap.