G - Physics – 01 – C
Patent
G - Physics
01
C
G01C 9/06 (2006.01)
Patent
CA 2509572
A leveling or plumbing device for indicating a line or a plane on a surface, such as wall or floor. The device includes a light beam generator that emits a light beam exteriorly of a body or housing. Level and/or plumb indicators, such as vials, are mounted to the housing for positioning the device in a predetermined orientation on the surface. The device includes a series of extendible and retractable engagement members, each of which defines an outer end having an adhesive. The adhesive engages the surface to releasably secure the device to the surface. The engagement members are biased inwardly toward a retracted position. The adhesive engagement of the engagement members with the surface maintains the engagement members in the extended position against the inward bias.
Borden Ladner Gervais Llp
Lu Jianhong
LandOfFree
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