Timothy M Logman

49646133, Oct 23, 1990

Oct 18, 1989

7/423155

Timothy M. Logman - Monticello IL

Mueller Co. - Decatur IL

F16K 3150

251267

In a gate valve, the valve member is connected to an operating stem which extends upwardly through an opening in the housing for connection to a hand wheel rotatably carried by a yoke through which a portion of the stem extends; rotation of the hand wheel is transferred to linear motion of the valve stem through a split pair of threaded nut members the upper one of which is rotatably engaged with the hand wheel and the lower one of which is rotatably carried in a bore of the support yoke through which a threaded portion of the stem extends; the upper and lower nut members are intergaged to prevent relative rotation therebetween and are of identical configuration.

48487309, Jul 18, 1989

Jun 29, 1988

7/213148

Timothy M. Logman - Monticello IL
Joseph L. Daghe - Decatur IL
Dennis W. Humes - Decatur IL
Carl E. Floren - Decatur IL
Gary L. Bouc - Decatur IL

Mueller Co. - Decatur IL

F16K 5100

251367

A valve body having an opening and a cover for closing the opening is provided with confronting sealing surfaces each having a circumferential recess of a specific shape to receive an elastic sealing ring; the sealing ring is provided with a tab which projects externally of the valve when assembled to indicate to proper positioning of the seal ring upon assembly; a process for manufacturing mold parts using a lost foam method includes replicating a valve part in styrene, forming a sand mold about the styrene and then pouring molten metal into the mold to destroy the styrene and fill the mold cavity thus formed.