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:
Jun. 09, 1981
Filed:
Jul. 26, 1979
Jon A Rahe, Mission Viejo, CA (US);
Hawaiian Motor Company, Torrance, CA (US);
Abstract
A housing and cutting line assembly for a vegetation cutting apparatus of the type which cuts with rapidly moving lines extending from a rotating housing includes metallic line guides taking a configuration which addresses the effective guiding of the extending of the lines exteriorly of the housing and the dissipation of heat from the lines. The line guides each have a trailing side wall bearing surface for the associated line, which includes two linear surface portions angularly disposed with respect to one another, and a leading side wall bearing surface which includes a linear surface portion and a curvilinear surface portion. The linear leading side wall surface portion is substantially uniformly spaced from an inner, linear trailing side wall bearing surface portion, and the curvilinear surface portion of the leading side wall bearing surface curves away from this inner surface portion. In addition, the lines guides each in part define an air channel for moving air on the leading side of the associated line relative to the line guide to cool the line, and each further define an air cavity therein, located to trail the associated line, for conducting heat generated in the line away from the line.