Patent US3715874A successfully refreshed from Google Patents.
US3715874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lawn mower cutters
Assignee: Individual
•
Filing: 1971-10-01
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Granted: 1973-02-13
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Expires: 1991-10-01
Abstract
Abstract A lawn mower cutter having a rotatable body and a plurality of cutting units with sharpened edges and object striking ends pivoted thereto and adapted to swing outwardly by centrifugal force, said units being adapted to swing inwardly of the peripheral edge of said body to protective areas of the body where the cutting edges of said units are within the protective areas of the body, said body having marginal undulating edges defining the protective areas and forming projections serving to engage objects and shift the same outwardly.
Inventors
- 👤 C Goserud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:39
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412; A01D34/63; A01D34/73; A01D34/736
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
130 words
A lawn mower cutter comprising: a. a rotary body having b. an undulating marginal edge forming: c. spaced alternating projections and recesses therebetween, d. a number of cutting units pivoted to said rotary body and having cutting means with sharpened edges adapted to swing outwardly beyond certain of said projections when said cutting means are in cutting position, e. said cutting units being adapted to move inwardly with the cutting means thereof in register with an adjacent projection to protect the same when said cutting means engages an object resisting cutting, f. the projection registering with the displaced cutting means engaging the object causing inward movement of the denoted cutting means, engaging the denote object to move the same out of the path of movement of the following cutting unit.
Claim 2
Dependent Claim
130 words
A lawn mower cutter comprising: a. a rotary body having b. an undulating marginal edge forming: c. spaced alternating projections and recesses therebetween, d. a number of cutting units pivoted to said rotary body and having cutting means with sharpened edges adapted to swing outwardly beyond certain of said projections when said cutting means are in cutting position, e. said cutting units being adapted to move inwardly with the cutting means thereof in register with an adjacent projection to protect the same when said cutting means engages an object resisting cutting, f. the projection registering with the displaced cutting means engaging the object causing inward movement of the denoted cutting means, engaging the denote object to move the same out of the path of movement of the following cutting unit.
Claim 3
Dependent Claim
130 words
A lawn mower cutter comprising: a. a rotary body having b. an undulating marginal edge forming: c. spaced alternating projections and recesses therebetween, d. a number of cutting units pivoted to said rotary body and having cutting means with sharpened edges adapted to swing outwardly beyond certain of said projections when said cutting means are in cutting position, e. said cutting units being adapted to move inwardly with the cutting means thereof in register with an adjacent projection to protect the same when said cutting means engages an object resisting cutting, f. the projection registering with the displaced cutting means engaging the object causing inward movement of the denoted cutting means, engaging the denote object to move the same out of the path of movement of the following cutting unit.
Claim 4
Dependent Claim
130 words
A lawn mower cutter comprising: a. a rotary body having b. an undulating marginal edge forming: c. spaced alternating projections and recesses therebetween, d. a number of cutting units pivoted to said rotary body and having cutting means with sharpened edges adapted to swing outwardly beyond certain of said projections when said cutting means are in cutting position, e. said cutting units being adapted to move inwardly with the cutting means thereof in register with an adjacent projection to protect the same when said cutting means engages an object resisting cutting, f. the projection registering with the displaced cutting means engaging the object causing inward movement of the denoted cutting means, engaging the denote object to move the same out of the path of movement of the following cutting unit.
Claim 5
Dependent Claim
23 words
A lawn mower cutter according to claim 1 in which: a. the edges of the projections and recesses of the body are curved.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |