Geometrical instruments – Distance measuring – Of length by rolling contact
Reexamination Certificate
2008-08-04
2011-12-27
Fulton, Christopher (Department: 2841)
Geometrical instruments
Distance measuring
Of length by rolling contact
C033S782000, C033S779000
Reexamination Certificate
active
08082676
ABSTRACT:
A brake mechanism for a wheeled distance measuring device includes a first brake rod and a second brake rod, both of which are located in a pole unit of the distance measuring device. The first brake rod is connected with a brake key and the second brake rod is connected with a contact section which has a brake pad connected thereto. The brake key includes first and second protrusions and a control rod is connected with the first brake rod, the control rod includes third and fourth protrusions. A locking recess is defined between the third and fourth protrusions. The first and second brake rods are lowered to brake the wheel by the brake pad when the first protrusion presses the third protrusion. The second protrusion is locked in the locking recess and presses the third protrusion to keep the wheel to be braked.
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