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:
Nov. 02, 1999
Filed:
May. 01, 1996
Ralph D Burgess, Jr, Plymouth, MN (US);
Food Engineering Corporation, Minneapolis, MN (US);
Abstract
A sight window assembly and a method of making same, the assembly being comprised of a windowpane panel mounted directly and under radial compression within an annular window-opening of a vessel wall panel and having cooperative annular peripheral portions which are complementary in shape to the window-opening defining portions of the wall panel, said panels having cooperative, mechanical, annular, positive interlocking elements. The method is comprised of providing the wall panel with the annular opening-defining portions, and the light-permeable windowpane panel, shaped to conform to the shape of the opening, and being slightly larger radially under predetermined equilibrium thermal conditions, and effecting a change in the equilibrium conditions to cause an increase in the radial differential of the wall panel opening and windowpane panel so as to permit the windowpane panel to be inserted within the opening in closing relation, inserting the windowpane panel in substantially such closing relation while maintaining said change in conditions, and maintaining the windowpane panel in such opening-closing position while permitting the wall panel and windowpane panel to return to a condition approaching such equilibrium conditions.