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:
Aug. 25, 1981
Filed:
Nov. 16, 1979
John W Schnell, Columbia, MO (US);
Max K Haenel, Columbia, MO (US);
Benchmark Tool Company, Vandalia, OH (US);
Abstract
A spool feed mechanism for a non-metallic, line grass trimmer wherein the free end of the cutting line is spun at high speed for cutting vegetation, includes a spool of cutting line mounted for rotation about the central axis thereof. The spool has first and second ratchet wheels located at respective ends. Each ratchet wheel includes a set of ratchet teeth, one set of which is angularly displaced with respect to the other. A U-shaped, resilient member having first and second pawls provided on the legs thereof is mounted adjacent the spool with the pawls positioned for alternate engagement and disengagement of the respective ratchet wheels. A manually operated trigger assembly coupled to the member moves the latter from a normal position to disengage the first pawl and ratchet wheel and to engage the second pawl and ratchet wheel, whereby the spool is permitted to rotate incrementally to feed a predetermined length of cutting line. Movement of the member back to the normal position feeds out a second predetermined length of line. A force applied at the center of the resilient member disengages both pawls and respective ratchet wheels to permit free rotation of the spool to load a fresh spool of cutting line.