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:
May. 31, 1983
Filed:
Sep. 22, 1980
Applicant:
Inventor:
Jon A Zboralski, Manitowoc, WI (US);
Assignee:
Hamilton Industries, Inc., Two Rivers, WI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F23J / ;
U.S. Cl.
CPC ...
9811 / ; 49449 ; 292216 ; 292D / ; 292D / ; 312215 ;
Abstract
A laboratory fume hood with at least two vertically movable sashes that are operatively coupled together by a sash lock that prevents both of the sashes from being opened at the same time. Opening of one sash automatically flips a pivoted lock into locking engagement with the other sash. Thus, one of the sashes must be closed before the other can be opened. This prevents the excessive waste of heated or cooled room air being sucked out through the fume hood.