Rotary cutter for mowers

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 4738085
SERIAL NO

06867502

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A rotary cutter head for use with a rotating filament trimmer in which a reel for winding cords or filaments is held between a housing covering a lower portion thereof and a retainer or hub fixed on the driven rotating shaft of the trimmer unit and is rotatably disposed within the housing. Within the bore of the reel, an axially movable slider is normally biased toward the retainer by the elastic force of a spring so that meshing engagement occurs between a peripheral array of axially projecting tongues formed on one end of the slider and a plurality of radial teeth-like ribs formed on the inner side of the retainer and establishes a driving connection to rotate the reels. By applying an axial impact against the housing, the slider is moved axially by inertial forces against the biasing force of the spring to release that engagement, and axially projecting detent fingers formed around the other end of the slider press against the opposed slopes of a circular rib formed on the inner side of the housing and bring about both positive relative rotation of the reel and fix a limit to such rotation to a predetermined amount thereby to play out a limited length of fresh cords. In order that the reel may rotate in an opposite direction to rewind the cords, moreover, the radial ribs formed on the retainer and the tongues of the slider are formed with opposed cooperating cam slopes which force the slider axially until the tongues are clear of the ribs during backward rotation.

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Patent Owner(s)

Patent OwnerAddress
STARTING INDUSTRY COMPANY LIMITED 4-4-4 MOMOI SUGINAMI-KU TOKYO JAPANNot Provided

International Classification(s)

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  • 1986 Application Filing Year
  • A01D Class
  • 172 Applications Filed
  • 1 Patents Issued To-Date
  • 0.59 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances19861987198819890255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Nishio, Tadashi Tokyo, JP 15 173
Osakabe, Mitsuo Tokyo, JP 7 70
Shimizu, Keizo Tokyo, JP 17 147
Sonoda, Akihiro Tokyo, JP 6 31

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  • 14 Citation Count
  • A01D Class
  • 0 % this patent is cited more than
  • 37 Age
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