Kenneth W Schaefer

US Patent:

55135560, May 7, 1996

Filed:

Nov 30, 1993

Appl. No.:

8/159667

Inventors:

Kenneth A. Schaefer - Hartford WI

International Classification:

F16J 1532

US Classification:

92168

Abstract:

An improved packing gland construction for a fluid cylinder that includes an angular elongated resilient sealing member disposed in contact with the piston rod of the cylinder. An end of the sealing member facing the interior of the cylinder is provided with a flexible lip and the internal pressure within the cylinder acts to urge the lip inwardly into sealing engagement with the piston rod. The outer end of the sealing member is provided with a tapered wiper which rides on the piston rod and acts to remove foreign material from the rod. The outer surface of the sealing member is formed with a circumferential groove which receives a ring, and the inner end of the ring bears against an abutment on the cylinder while the outer end of the ring is engaged by a cap that is secured to the end of the cylinder. The cap has an annular inclined surface which engages and urges the wiper inwardly against the piston rod.

US Patent:

41738764, Nov 13, 1979

Filed:

Mar 27, 1978

Appl. No.:

5/890361

Inventors:

Kenneth A. Schaefer - Brookfield WI

Assignee:

Nudyne Corporation - Brookfield WI

International Classification:

B21D 2216

US Classification:

72 83

Abstract:

A method of producing metal tubing, particularly thin-wall, large diameter metal tubing, by clamping one end of a tubular metal blank to a mandrel, rotating the mandrel and blank, and subjecting the blank to both axially and radial deforming pressures through a series of circumferentially spaced rollers to cause the metal of the blank to flow axially ahead of the rollers to reduce the wall thickness of the blank. To achieve the desired thin wall construction without rippling of the internal diameter, the ratio of linear feed of the tubular blank to rotational speed of the blank per inch of tube diameter is maintained in the range of 0. 006 to 0. 012.