US4183196A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mowing device
Assignee: Vicon NV
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Filing: 1978-01-12
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Granted: 1980-01-15
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Expires: 1998-01-12
Abstract
Abstract A mowing device includes at least a pair of cooperative rotary cutting mechanisms. Each cutting mechanism comprises a driven carrier and at least one cutter pivotally connected thereto and projecting radially therefrom. Mounted below each carrier is a cutting plate having a cutting edge above which the associated cutter sweeps. The cutting edge of the cutter normally lies along a line which defines an acute angle with at least portions of the cutting edge of the cutting plate so as to effect a scissors action therewith, and which line also is angularly offset by more than 90° with respect to a line passing through the center of gravity of the cutter and the axis of rotation of the carrier.
Inventors
- 👤 Pieter A. Oosterling
- 👤 Hendricus C. VAN Staveren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:28
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412; A01D34/63; A01D34/64; A01D34/66; A01D34/664
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
168 words
A mowing device comprising, in combination: an elongate housing adapted to extend transversely of a line of mowing travel and having at least two drive shafts projecting upwardly therefrom; gear means within said housing for rotating said drive shaft in relatively opposite direction; a pair of carriers, one connected to each drive shaft, and at least one cutter associated with each carrier, each cutter having a cutting edge and means rotatably mounting each cutter to its associated carrier such that said cutting edge extends along a line which is angularly offset by greater than 90° from a line passing through the center of gravity of the cutter and the center of rotation of the associated carrier; and a pair of non-driven counter-cutters carried by said housing, one beneath each carrier, each counter-cutter having a cutting edge underlying the cutting edge of the associated cutter and which includes at least portions which define an acute angle with the cutting edge of the associated cutter when the latter sweeps thereover.
Claim 2
Dependent Claim
168 words
A mowing device comprising, in combination: an elongate housing adapted to extend transversely of a line of mowing travel and having at least two drive shafts projecting upwardly therefrom; gear means within said housing for rotating said drive shaft in relatively opposite direction; a pair of carriers, one connected to each drive shaft, and at least one cutter associated with each carrier, each cutter having a cutting edge and means rotatably mounting each cutter to its associated carrier such that said cutting edge extends along a line which is angularly offset by greater than 90° from a line passing through the center of gravity of the cutter and the center of rotation of the associated carrier; and a pair of non-driven counter-cutters carried by said housing, one beneath each carrier, each counter-cutter having a cutting edge underlying the cutting edge of the associated cutter and which includes at least portions which define an acute angle with the cutting edge of the associated cutter when the latter sweeps thereover.
Claim 3
Dependent Claim
42 words
A mowing device as defined in claim 1 wherein the cutting edge of each counter-cutter is circularly arcuate and including means for mounting each counter-cutter such that such circular cutting edge is eccentric to the axis of rotation of the associated cutter.
Claim 4
Dependent Claim
27 words
A mowing device as defined in claim 2 wherein each counter-cutter is rotatably mounted on the housing concentric with the axis of rotation of its associated carrier.
Claim 5
Dependent Claim
16 words
A mowing device as defined in claim 2 wherein each counter-cutter is fixed to said housing.
Claim 6
Dependent Claim
32 words
A mowing device as defined in claim 4 including means for vertically adjusting each counter-cutter for varying the spacing between the cutting edge thereof and the cutting edge of its associated cutter.
Claim 7
Dependent Claim
17 words
A mowing device as defined in claim 1 wherein the cutting edge of each counter-cutter is serpentine.
Claim 8
Dependent Claim
17 words
A mowing device as defined in claim 1 wherein the cutting edge of each counter-cutter is serrated.
Claim 9
Dependent Claim
38 words
A mowing device as defined in claim 1 including at least one supporting skid attached to said housing and extending therebeneath, said skid having an upwardly curved front end terminating just below the cutting edge of a counter-cutter.
References Cited (Backward Citations)
US1291295A
Cited
CH104951A
Cited
US3247657A
Cited
US3524306A
Cited
US3513648A
Cited
US3916725A
Cited
US3905182A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-01-14 | 1983-07-16 | 1984-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-14 | 1987-07-16 | 1988-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-14 | 1991-07-16 | 1992-01-15 | $7700.00 | Window Closed / Lapsed |