The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 01, 1991
Filed:
Nov. 29, 1989
Michael J Pollack, Lansdale, PA (US);
John Lawson, Hatfield, PA (US);
Three E. Laboratories Inc., Lansdale, PA (US);
Abstract
The feedthrough device includes first and second half housing members, each of which has an internal chamber. The feedthrough device further includes a removable header member that fits within the chambers of the first and second half housing members when they are threaded together. The first half housing member has a threaded protrusion which fits into a threaded aperture located in the wall of a sealed structure, such as the wall of a vacuum furnace. The threaded protrusion arrangement includes a first 'O' ring which seals the periphery of the aperture in the wall of the sealed structure. The header has first connectable terminals on one end and second connectable terminals on the other end. In between the first and second connectable terminals of the header there is located a plate member which fits along the edge of the first half housing member chamber; and located between that edge and the plate is a second 'O' ring. Wires connecting the first and second terminals pass through the plate member in a sealed arrangement. The second half housing member has an abutting structure located at the end of its chamber so that when the second half housing member threads with the first housing member, the plate is pushed by the abutting structure to squeeze the second 'O' ring to complete a seal of the first half housing member chamber. Accordingly, the first connectors are sealed against the outside world, but are connected to the circuitry within and outside of the sealed structure.