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US 8,011,109 B2Granted
Casing mount for a cylindrical vial
AssigneeEmpire Level Mfg. Corp.
InventorsJohn Christianson, Roger D. Stanford
Life of this patent
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AssigneeEmpire Level Mfg. Corp.
InventorsJohn Christianson, Roger D. Stanford
Estimating the term…
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.
In a level of the type having an elongate hollow frame including two sidewalls each defining axially aligned vial openings into the frame, the improvement comprising a vial casing secured with respect to the frame and defining 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 being formed of two opposite round face-walls and a surrounding cylindrical wall therebetween which has (a) a pair of opposed major wall-portions of first thickness and (b) a pair of opposed intervening wall-portions of second thickness greater than the first thickness, each intervening wall-portion defining a recess which snugly receives a corresponding one of the vial ends, the inner surface of the surrounding wall being 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.
A method of manufacturing a level of the type having an elongate hollow frame including two sidewalls each defining axially aligned vial openings into the frame, comprising:
Dependencies are inferred from the claim text.