John John Fetterolf

US Patent:

43433324, Aug 10, 1982

Filed:

Aug 27, 1979

Appl. No.:

6/070030

Inventors:

James W. Williams - Lansdale PA
John S. Fetterolf - Royersford PA

Assignee:

Fetterolf Corporation - Skippack PA

International Classification:

F16L 5510

US Classification:

138 943

Abstract:

A line blind includes seal rings on either side of a spectacle plate interposed in a pipe, and a special camming arrangement including two cooperating sets of longitudinally directed sloping teeth circularly arranged which operate on slight rotational movement of one, while the other is held stationary, to force engagement under pressure between the seal rings and the plate.

US Patent:

48671975, Sep 19, 1989

Filed:

Feb 15, 1989

Appl. No.:

7/311473

Inventors:

Andrew M. Ritter - Audubon PA
John S. Fetterolf - Royersford PA
James W. Williams - Gwynedd PA

Assignee:

Fetterolf Corporation - Skippack PA

International Classification:

F16K 4300

US Classification:

137315

Abstract:

An arrangement for providing access to the seal rings of a seatless high pressure valve includes an aperture in the valve body and a demountable sealed closure for the aperture. The sleeve within the valve body for transmitting the gland force to the seal rings is made in segments small enough for removal through the aperture to permit access to the seal rings. The valve seal rings may accordingly be replaced without disassembly of the major valve components including the valve plunger and gland.