Other

Carbide Blast Joints, Inc.

George P Maly

Arthur E Bergstrom

Richard H Nelson

There is disclosed a container that is useful as a sterilization chest for surgeons' instruments and the like. The container includes a generally open-top box having a peripheral flange about its top edge and an open channel extending along at least two of the opposite sides of the box in the peripheral flange. A flexible membrane cover is provided which overlies the top of the box and the peripheral flange and this membrane is reinforced with a plurality of stiffening members which are supported on the undersurface of the flexible membrane cover in a side-to-side array. These stiffening members have distal, downwardly dependent lips which are received in the open channel grooves in the peripheral flange whereby the stiffening members reinforce both the flexible cover and the upper sidewalls of the box, preventing collapse of these elements when the chamber within the chest is evacuated. The flexible cover serves to seal the container yet it can be readily removed by lifting from a corner and, in this fashion, also serves as a valve for the sterilization chest.

Sterilization chest

This is an improved blast joint for subterranean wells which is ideally suited for applications where corrosive compounds such as hydrogen sulfide and carbon dioxide are encountered. The blast joint comprises a plurality of temperature and corrosion resistant hard rings which are in a stacked end face-to-face array, coaxially carried on a length of tubing. The rings are resiliently compressed in the array by spring washers interspaced by flat washers and this assembly is retained by end collars distally carried on the tubing. The end collars which are employed in this invention have a collet type construction; each collar comprising a clamp ring slidably received over the end of the production tubing, having an internally threaded outer end and a tapered inside wall. A collet sleeve with a tapered outside wall is received in the clamp ring. The collar also includes an externally threaded bushing which is received in the threaded outer end of the clamp ring and serves as an axial stop for the collet sleeve as the clamp ring is tightened, compressing the collet sleeve about the outer surface of the tubing, firmly locking the assembly. All members of the collar are coated with a protective, corrosion resistant coating and the gripping surfaces of the collet sleeve are coated with a resin that is filled with angular granular material of a high hardness.

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Fullerton, CA, United States of America

George P Maly