Cvi Incorporated

Pennwalt Corporation

Harold Cheney Parish

Ivars Sigurds Spulgis

Jack Leland Pettit

Michael Duane Allard

Thomas N Hickey

David R Hoy

Charles B Hood

Jack E Jensen

First and second multi-stage cryogenic refrigerators each have a displacer driven by a common motor so that the displacers are substantially 180.degree. out of phase. The final stage of each refrigerator has a regenerator arranged in a heat exchange relationship with counterflow.

Multi-stage cryogenic refrigerators

A gas purifier having a removeable sample canister apparatus and gas adsorber in combination is provided for use in atmospheric containment and cleanup systems in nuclear power plants and other air and gas filtering applications. The sample canister is particularly adapted for removeable attachment to and use in combination with a gas adsorber having a plurality of parallel spaced filter beds. The sample canister is designed to permit the sampling of adsorbent material at discrete time intervals without disturbing adsorbent material in the filter beds and without disturbing the structural integrity of the gas adsorber to which the sample canister is attached.

Gas purifier having rechargeable adsorber filter with removeable

Methods for removing radioactive isotopes from contaminated gas streams for use in atmospheric containment and cleanup systems in nuclear power plants are provided. The methods provide for removal of radioactive isotopes from a first portion of the contaminated stream, separated from the remaining portion of the stream, so that adsorbent used to purify the first portion of the contaminated stream by adsorption of the radioactive isotopes therefrom can be tested to determine the adsorbing efficacy of the generally larger portion of adsorbent used to purify the remaining portion of the stream.

Methods for removing radioactive isotopes from contaminated streams

Methods are provided for filling adsorber filter cells with particulate granular adsorbent material from above the filter cells. The methods produce a substantially uniform packing density of particulate material in the cells without the necessity of vibrating the cells.

Methods for filling filter cells with adsorbent material

Apparatus is provided for use in filling charcoal adsorber air filter cells by dispersing the particulate charcoal into the filter while the apparatus is disposed vertically above the filter. The apparatus is particularly adapted to produce an even packing density of particulate charcoal in the filled air filter without the necessity of vibrating the air filter once the charcoal has been allowed to fill the filter to the top. A method is provided for semi-automatically, pneumatically filling the apparatus and the charcoal adsorber air filter. Some embodiments of the apparatus are adapted for filling two or more charcoal adsorber air filters simultaneously.

Charcoal adsorber filter fill system

A closure apparatus is provided for optionally closing and opening a storage hopper portion of an adsorber filter fill system used for filling adsorber filter cells in a gas adsorber filter system. The closure apparatus is particularly adapted to have a portion thereof move with respect to a metering means of storage hopper of an adsorber filter fill system between first or open and second or closed positions, so as to optionally, selectably permit the opening and closing of the storage hopper. The closure apparatus provides a substantially air-tight seal at holes in the metering means of the adsorber filter fill system when the closure apparatus is at the closed position. The closure apparatus is designed so that its sliding operation and maintenance of substantially air-tight seals is not adversely affected by the presence of any granules of adsorbent which remain in the holes in the metering means or in the vicinity of the holes in the metering means once filling of the adsorber filter system is completed.

Growing community of inventors

Upper Arlington, OH, United States of America

Harold Cheney Parish