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. 28, 1984
Filed:
Sep. 09, 1982
Ernest R Dynie, Brockville, CA;
Black & Decker Inc., Newark, DE (US);
Abstract
An improved rotor comb construction (and method of assembly) for a power lawn rake has a plurality of spring tines axially stacked along a tubular rotor shaft. Each of the tines has a retention coil portion and a working coil portion spaced therefrom. The retention coil portion frictionally engages the outer surface of the rotor shaft. The working coil portion has a radially-extending ground-engaging element. A radially-inturned end of the retention coil portion is received in a respective radial hole in the shaft, thereby keying the tines to the shaft for conjoint rotation. Each hole in the rotor shaft is displaced circumferentially from its adjacent hole, preferably by an angle .theta. which equals 360 degrees divided by the number of holes. With this construction, the holes and hence the spring tines are arranged in a substantially uniform helical formation about the axis of the rotor shaft.