Johnson Matthey Inc.

Other

Charles H Smith

Masyood Akhtar

Armando John Bardini

Kim-chi T Le

Jess Pedigo

Kim C Le

Tommy L Herrington

A gate valve structured for the removal and replacement of the valve gate, seats and seals through the flowpath of the valve, a valve body constructed as a single piece of material without covers or valve bonnet to access the seats, gate or interior parts of the valve body, a pair of bolted flanged conduits on each side of the valve body for the attachment to a pipeline and removal of the valve body from the pipeline for access to the body interior for removal of the ring seals and valve seats fitted to the body ports forming the flowpath. The installation or removal of the gate from the valve stem is accomplished by orienting the gate in the valve flowpath, unbolting a split rectangular collar from the stem through a rectangular opening in the gate, and the reorientation of the gate for the removal of a thread protector bolt from the face of the gate, and replacing it by a threaded rod which provides assistance for inserting or extracting the gate through the valve body flowpath.

Gate valve

A sealing glass composition suitable for bonding ceramic surfaces at low temperatures and which includes in weight percent 5-50% thallium oxide, 10-40% vanadium oxide, 5-30% tellurium oxide, 1.5-15% arsenic oxide and 1-5% phosphorous oxide. Other additives may be included, such as bismuth oxide. A paste formulated from said glass and a filler for the purpose of adjusting the fluidity and/or dielectric constant of the paste.

Sealing glass compositions

A silver-glass paste comprising silver flake, lead vanadium telluride glass, resin, surfactant and a mixture of solvents, said mixture comprising at least two solvents selected from the group consisting of glycol ether, isoparaffin, and terpineol, each of said solvents having a boiling point of from about 170.degree. C. to about 230.degree. C. and a surface tension of from about 20 to about 30 dynes/cm.sup.2.

Silver-glass die attach paste

Growing community of inventors

Ramona, CA, United States of America

Charles H Smith