Flexible tube having a variable stiffness bellows
Latest E. I. du Pont de Nemours and Company Patents:
Description
FIG. 1 is a perspective view of a flexible tube having a variable stiffness bellows showing my new design;
FIG. 2 is a front view thereof, the rear being identical; and,
FIG. 3 is an end view.
Claims
The ornamental design for a flexible tube having a variable stiffness bellows, as shown and described.
Referenced Cited
U.S. Patent Documents
| 1547431 | July 1925 | Mallory |
| 3050087 | August 1962 | Caplan |
| D221078 | July 1971 | Seckel et al. |
| 3842865 | October 1974 | Torricelli |
| 6056018 | May 2, 2000 | Renaud |
Patent History
Patent number: D460536
Type: Grant
Filed: May 22, 2001
Date of Patent: Jul 16, 2002
Assignee: E. I. du Pont de Nemours and Company (Wilmington, DE)
Inventor: Michel Claude Renaud (Prangins)
Primary Examiner: Robin V. Taylor
Application Number: 29/142,253
Type: Grant
Filed: May 22, 2001
Date of Patent: Jul 16, 2002
Assignee: E. I. du Pont de Nemours and Company (Wilmington, DE)
Inventor: Michel Claude Renaud (Prangins)
Primary Examiner: Robin V. Taylor
Application Number: 29/142,253
Classifications
