DAVID STANTON GRUPENHAGEN
Pilots at Dandelion Ave, Santa Ana, CA
License number
California A2280825
Issued Date
Oct 2015
Expiration Date
Oct 2017
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
9906 Dandelion Ave, Santa Ana, CA 92708
Professional information
Apparatus And Method For Spin Forming A Tube
US Patent:
6233991, May 22, 2001
Filed:
Aug 1, 2000
Appl. No.:
9/630079
Inventors:
Frederick H. Thimmel - Hartland WI
Per Carlson - Garden Grove CA
David S. Grupenhagen - Santa Ana CA
Carljohan Lorentzen - Huntington Beach CA
Henri T. Nguyen - Garden Grove CA
Herbert L. Franck - San Pedro CA
Per Carlson - Garden Grove CA
David S. Grupenhagen - Santa Ana CA
Carljohan Lorentzen - Huntington Beach CA
Henri T. Nguyen - Garden Grove CA
Herbert L. Franck - San Pedro CA
Assignee:
Bryant Products, Inc. - Ixonia WI
International Classification:
B21B 1916
US Classification:
72 84
Abstract:
An improved apparatus and method are provided for spin-forming tapered rollers, including but not limited to conveyor rollers, drum pulleys, web feed rollers and the like, from a tube without using any internal or external supports between the ends of the tube. The apparatus includes first and second clamp assemblies which support opposite ends of the tube. A rotation structure rotates the tube as a plurality of rollers engage the outer surface thereof. The rollers move between the clamp assemblies to alter the outer diameter of the tube during travel. A controller controls the urging of the rollers against the tube and controls the movement of the rollers between the clamp assemblies.