Patent US3742688A successfully refreshed from Google Patents.
US3742688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rake attachment for rotary mower
Assignee: Individual
•
Filing: 1972-11-06
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Granted: 1973-07-03
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Expires: 1992-11-06
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 21:20
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.
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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 |