US4178746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary mowers
Assignee: Massey Ferguson Services NV
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Filing: 1977-12-23
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Granted: 1979-12-18
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Expires: 1997-12-23
Abstract
Abstract Agricultural mower has vertical axis crop-cutting rotors mounted for floating vertical movement relative to semi-mounted mower frame. Draught forces are transmitted to each rotor through a draught member below the rotor on which the rotor is journalled. The draught member projects rearwards beyond the cutting circle of the blades and is connected to the frame by an upwardly-extending structure including a parallelogram linkage.
Inventors
- 👤 Robert Allely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:34
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412; A01D34/63; A01D34/64; A01D34/66; A01D34/661
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
173 words
An agricultural mower comprising a frame, hitch means on the frame for connecting the frame to a tractor; at least one crop cutting rotor assembly comprising a generally flat plate, a support leg secured to the rear portion of the flat plate and extending generally upwardly from the flat plate, an upwardly extending stub shaft secured to the forward end of the flat plate, a tubular drive shaft rotatably journaled on the upwardly extending stub shaft, a blade carrier plate secured to the lower portion of the tubular drive shaft, a plurality of crop cutting blades secured to the blade carrier plate and extending outwardly beyond the outer edge of the blade carrier plate, drive means for rotating the tubular drive shaft and the blade carrier plate attached to and supported on the upper end of the tubular drive shaft, and a linkage assembly secured to the upper end of the support leg and the frame, said linkage assembly permitting the generally flat plate to move up and down relative to the frame.
Claim 2
Dependent Claim
173 words
An agricultural mower comprising a frame, hitch means on the frame for connecting the frame to a tractor; at least one crop cutting rotor assembly comprising a generally flat plate, a support leg secured to the rear portion of the flat plate and extending generally upwardly from the flat plate, an upwardly extending stub shaft secured to the forward end of the flat plate, a tubular drive shaft rotatably journaled on the upwardly extending stub shaft, a blade carrier plate secured to the lower portion of the tubular drive shaft, a plurality of crop cutting blades secured to the blade carrier plate and extending outwardly beyond the outer edge of the blade carrier plate, drive means for rotating the tubular drive shaft and the blade carrier plate attached to and supported on the upper end of the tubular drive shaft, and a linkage assembly secured to the upper end of the support leg and the frame, said linkage assembly permitting the generally flat plate to move up and down relative to the frame.
Claim 3
Dependent Claim
23 words
The agricultural mower of claim 1 wherein the crop cutting rotor assembly includes a skid secured to the bottom of the flat plate.
Claim 4
Dependent Claim
31 words
The agricultural mower of claim 1 wherein the crop cutting rotor assembly includes a crop feeding drum attached to the tubular drive shaft and extending upwardly from the blade carrier plate.
Claim 5
Dependent Claim
20 words
The agricultural mower of claim 1 wherein the crop cutting rotor assembly blade carrier plate has a convex upper surface.
Claim 6
Dependent Claim
60 words
The agricultural mower of claim 1 wherein the drive means for rotating the tubular drive shaft and the blade carrier plate includes a gear box with an output shaft attached to and supported by the tubular drive shaft and wherein a torque plate is connected to the gear box to restrict rotation of the gear box relative to the frame.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-12-17 | 1983-06-18 | 1983-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-17 | 1987-06-18 | 1987-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-17 | 1991-06-18 | 1991-12-18 | $7700.00 | Window Closed / Lapsed |