Spirit level

Details Spirit level Spirit level

2005-07-12

2005-07-12

Fulton, Christopher W. (Department: 2859)

Geometrical instruments

Straightedge type

Combined with level

C033S485000, C033S382000

Reexamination Certificate

active

06915588

ABSTRACT:
A spirit level has a body member containing a leveling tube, in which the base of the body member has a width greater than the width of the body member in any other plane parallel with the base. Preferably the body member is triangular in cross section and may include three elongate wing or flange members extending radially from a central hub region. The body member may have axially-extending, for example telescopic, end members.

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patent: 5165650 (1992-11-01), Letizia
patent: 5577327 (1996-11-01), Archambault
patent: 6029359 (2000-02-01), Szumer
patent: 195 30 990 (1997-04-01), None
patent: 51123173 (1976-10-01), None
patent: 08072486 (1996-03-01), None

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