Geometrical instruments – Straight-line light ray type – Alignment device
Reexamination Certificate
2008-05-06
2008-05-06
Bennett, G. Bradley (Department: 2859)
Geometrical instruments
Straight-line light ray type
Alignment device
C033SDIG021, C033S347000, C033S370000
Reexamination Certificate
active
07367129
ABSTRACT:
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.
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Bennett G. Bradley
Boyle Fredrickson , S.C.
Cohen Johnson Amy
Johnson Level & Tool Mfg. Co. Inc.
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