US4727711A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mowing device
Assignee: PJ ZWEEGERS EN ZONEN LANDBOUWMACHINEFABRIEK BV NUENENSEWEG 165 5667 KP GELDROP NETHERLANDS
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Filing: 1986-09-24
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Granted: 1988-03-01
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Expires: 2006-09-24
Abstract
Abstract Mowing device provided with a frame supported by ground wheels which can be coupled to a vehicle by means of a drawbar, and with a number of cutting means arranged side by side when seen in the intended direction of movement of the mowing device during operation, said cutting means being rotatable about upwardly extending axes of rotation and being provided with knives, said cutting means being supported during operation by at least two skids arranged near the outermost cutting means and being in contact with the ground behind the foremost points of the paths described by the knives of the cutting means, while the frame part supporting the cutting means can move resiliently relative to the ground wheels, whereby the drawbar is adjustable relative to the frame about a pivot axes extending transverse to the intended direction of movement during operation.
Inventors
- 👤 P. Quataert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:51
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412; A01D34/63; A01D34/64; A01D34/66; A01D34/664; A01D34/661
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
189 words
A mowing device having a direction of movement during operation and comprising a frame, wheels on said frame for supporting said frame on the ground, a plurality of cutting means disposed in side by side relation transversely to said direction of movement carried by said frame and rotatable about substantially upward extending axes of rotation, said cutting means having knives thereon defining substantially circular cutting paths when in operation, a plurality of resilient skids supporting said cutting means and contacting the ground rearwardly of the foremost portions of the cutting paths of said knives such that said frame is supported resiliently with respect to said ground wheels, means on said frame for defining a substantially vertical pivot axis for pivotable connection to a draw bar coupled to a vehicle, and means on said frame for tilting said vertical pivot axis in a vertical plane parallel to the direction of movement such that said draw bar is adjusted relative to said frame around a horizontal axis transverse to the direction of movement whereby the rotary axes of said cutting means are tilted in planes parallel to the direction of movement.
Claim 2
Dependent Claim
189 words
A mowing device having a direction of movement during operation and comprising a frame, wheels on said frame for supporting said frame on the ground, a plurality of cutting means disposed in side by side relation transversely to said direction of movement carried by said frame and rotatable about substantially upward extending axes of rotation, said cutting means having knives thereon defining substantially circular cutting paths when in operation, a plurality of resilient skids supporting said cutting means and contacting the ground rearwardly of the foremost portions of the cutting paths of said knives such that said frame is supported resiliently with respect to said ground wheels, means on said frame for defining a substantially vertical pivot axis for pivotable connection to a draw bar coupled to a vehicle, and means on said frame for tilting said vertical pivot axis in a vertical plane parallel to the direction of movement such that said draw bar is adjusted relative to said frame around a horizontal axis transverse to the direction of movement whereby the rotary axes of said cutting means are tilted in planes parallel to the direction of movement.
Claim 3
Dependent Claim
33 words
A mowing device as claimed in claim 1 wherein said skids are in contact with the ground behind the axis of rotation of the cutting means with respect to said direction of movement.
Claim 4
Dependent Claim
32 words
A mowing device as claimed in claim 1 wherein said skids comprise strips of spring steel having fixed points and freely protruding portions extending behind the rearmost fixed points of the skids.
Claim 5
Dependent Claim
20 words
A mowing device as claimed in claim 1 wherein a said skid is disposed under each of said cutting means.
Claim 6
Dependent Claim
57 words
A mowing device as claimed in claim 1 wherein said vertical pivot axis defining means comprises a pair of axially aligned pins protruding above and below a draw bar, said pins being journaled in omnilaterally pivotally supported bushes, a member adjustably mounted on said frame, at least one of said bushes being mounted in said adjustable member.
Claim 7
Dependent Claim
35 words
A mowing device as claimed in claim 5 wherein said member comprises an arm mounted for pivotal movement with respect to said frame about a vertical axis spaced from the bush mounted in said member.
Claim 8
Dependent Claim
29 words
A mowing device as claimed in claim 6 and further comprising a screw spindle shaft connected to said arm and said frame to selectively pivot and adjust said arm.
Claim 9
Dependent Claim
28 words
A mowing device as claimed in claim 6 and further comprising a power cylinder connected to said arm and said frame to selectively pivot and adjust said arm.
Claim 10
Dependent Claim
35 words
A mowing device as claimed in claim 8 and further comprising means on said frame for selectively positioning said power cylinder in a plurality of positions parallel to the longitudinal axis of the power cylinder.
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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) | 1991-03-01 | 1991-08-31 | 1992-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-01 | 1995-08-31 | 1996-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-01 | 1999-08-31 | 2000-03-01 | $7700.00 | Window Closed / Lapsed |