The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 27, 1976
Filed:
Mar. 12, 1975
Ted L Teach, Springfield, OH (US);
Laserplane Corporation, Dayton, OH (US);
Abstract
Apparatus for controlling the elevation of the working tool of an earthworking machine, or the pavement distributor head of a mobile road-paving machine, in predetermined relationship to a fixed horizontal plane, as set by a laser beam which is periodically swept across the working area, such apparatus comprising a tape-dispensing device carried by the machine and arranged to intermittently advance the tape past a tape reader; the tape carrying two sets of indicia, one set indicating whenever a change in the height of the tool is required at a particular point in the travel of the machine, and the second set of indicia indicating the distance between such points, there being a ground-engaging wheel measuring the travel of the machine and connected to the tape-dispensing device to advance the tape to the next set of indicia whenever the machine arrives at the next one of said predetermined points.