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. 08, 1978
Filed:
Jul. 29, 1977
Applicant:
Inventors:
John D Sheldon, Charlotte, NC (US);
Textron Inc, Providence, RI (US);
Assignee:
Other;
Primary Examiner:
Int. Cl.
CPC ...
A01D / ;
U.S. Cl.
CPC ...
30276 ; 56295 ;
Abstract
A filament-type trimmer comprises at least one filament spool carried by a rotary housing driven by a motor the speed of which increases with decrease in load. Means for normally restraining rotation of the filament spool relative to the casing is responsive to centrifugal force to release the spool to feed additional filament when the speed of the motor increases due to a decrease in load by reason of the extending end of the filament having become shorter by wearing or breaking off. In one embodiment the feed of additional filament is delayed until by manual control the speed is reduced below normal operating speed.