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:
Sep. 06, 2011
Filed:
Feb. 27, 2009
John Christianson, Waukesha, WI (US);
Roger D. Stanford, Waterford, WI (US);
John Christianson, Waukesha, WI (US);
Roger D. Stanford, Waterford, WI (US);
Empire Level Mfg. Corp., Mukwonago, WI (US);
Abstract
A level of the type having an elongate hollow frame including two sidewalls each defining axially aligned vial openings into the frame. A vial casing is secured with respect to the frame and defines a hermetically sealed single-cavity casing interior entirely enclosing a liquid-and-bubble vial with a substantially cylindrical outer surface extending between two vial ends. The casing is formed of two opposite round face-walls and a surrounding cylindrical wall therebetween. The cylindrical wall has a pair of opposed major wall-portions of first thickness and a pair of opposed intervening wall-portions of second thickness greater than the first thickness. Each intervening wall-portion defines a recess which snugly receives a corresponding one of the vial ends. The inner surface of the surrounding wall is smooth and substantially free of light-ray-interfering structures, whereby the vial appears embedded in the surrounding wall and the face-walls provide uninterrupted full views of and about the cylindrical vial.