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US3742688A Expired / Lapsed US ⏱️ 0.0 years remaining

Rake attachment for rotary mower

Assignee: Individual
•
Filing: 1972-11-06
•
Granted: 1973-07-03
•
Expires: 1992-11-06
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Abstract

Abstract A rotating power rake for use with a rotary mower including hinged tooth carriers adapted to be held in an operative position by aerodymanic forces.

Inventors

  • 👤 H Tonjes

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-08 07:54
CPC Classifications
A; A01; A01D; A01D43/00; A01D43/02

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 76 words
For use on lawns, a rotary rake means comprising blade means adapted to be rotated, movable flap means attached to said blade means at a trailing edge thereof, said flap means being positioned to be pressed downwardly by aerodynamic forces generated by the rotation of said blade means, and finger means on said flap means adapted to touch said lawn, said aerodynamic foces being such as to press said finger means into contact with the lawn.
Claim 2
Dependent Claim 76 words
For use on lawns, a rotary rake means comprising blade means adapted to be rotated, movable flap means attached to said blade means at a trailing edge thereof, said flap means being positioned to be pressed downwardly by aerodynamic forces generated by the rotation of said blade means, and finger means on said flap means adapted to touch said lawn, said aerodynamic foces being such as to press said finger means into contact with the lawn.
Claim 3
Dependent Claim 17 words
The device of claim 1 in which said flap means are removably attached to said blade means.
Claim 4
Dependent Claim 37 words
The device of claim 1 in which said flap means is a part of hinged means having a part fixed to said blade and a part movable relative thereto, said last named part forming the flap means.
Claim 5
Dependent Claim 41 words
The device of claim 3 in which said hinged means includes a removable pin adapted to hold said fixed part and said flap part in movable relationship to each other, said pin being removable to allow disassembLy of said hinged means.
Claim 6
Dependent Claim 36 words
The device of claim 1 in which stop means are fastened to said blade and are positioned to engage said flap means, said positioning being such that the flap means slope upward from said blade means.
Claim 7
Dependent Claim 84 words
For attachment to the blade of a rotary lawn mower, rake means comprising hinged means having two parts hinged together, one of said parts being a fixed part adapted to be attached to said blade and the other of said parts being a flap part, wire finger means attached to said flap part and extending downwardly therefrom when mounted on said blade, said flap part being arranged normally to slope upward from said blade when said fixed part is properly attached to said blade.
Claim 8
Dependent Claim 84 words
For attachment to the blade of a rotary lawn mower, rake means comprising hinged means having two parts hinged together, one of said parts being a fixed part adapted to be attached to said blade and the other of said parts being a flap part, wire finger means attached to said flap part and extending downwardly therefrom when mounted on said blade, said flap part being arranged normally to slope upward from said blade when said fixed part is properly attached to said blade.
Claim 9
Dependent Claim 35 words
The device of claim 6 in which stop means is attached to said fixed part in position to engage said flap part to stop said flap part from dropping below its normal upward sloping position.
Claim 10
Dependent Claim 37 words
The device of claim 7 in which said fixed part and said flap part are held together by a removable pin, said pin being removable so that said hinge may be disassembled and said flap part removed.

References Cited (Backward Citations)

US2720071A Cited
US3015929A Cited
US3117633A Cited
US3184903A Cited
US3367093A Cited
US3589112A Cited
US3611691A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-07-02 1977-01-01 1977-07-03 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-07-02 1981-01-01 1981-07-03 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-07-02 1985-01-01 1985-07-03 $7700.00 Window Closed / Lapsed

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