US3757500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple unit lawnmower construction
Assignee: Individual
•
Filing: 1971-10-12
•
Granted: 1973-09-11
•
Expires: 1991-10-12
Abstract
Abstract A powered lawnmower comprising a powered tractor having a trailing mower assembly hitched thereto. The trailing assembly includes a frame detachably hitched to the tractor and having a plurality of rotary mower units secured thereto. In one embodiment, these mower units are positioned so that their cutting swaths overlap slightly with the cutting swath of a rotary mower unit supported upon the tractor. In another embodiment, the trailing assembly includes a plurality of rotary mower units which define a continuous cutting swath. In both embodiments, the mower units on the trailing assembly are powered independently of the tractor. In addition, the trailing assembly is vertically adjustable for different cutting heights, and the trailing mower units may be laterally adjustable for different cutting widths.
Inventors
- 👤 M Averitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:07
CPC Classifications
A; A01; A01D; A01D75/00; A01D75/30
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
172 words
A lawnmower construction comprising a powered tractor including a frame supported for movement along the ground by wheels, a rotary mower unit supported by said tractor frame and located substantially midway of the width thereof, first drive means on said tractor frame powering said tractor and said mower unit, steering means on said tractor frame for controlling the direction of movement of said tractor, a trailing assembly including a rigid frame pivotally attached to the rearward portion of said tractor frame for movement about a generally vertical axis and a pair of Rotary mower units fixedly secured to said rigid frame and disposed substantially outboard of and on opposite sides of said tractor mounted mower unit, said frame and said trailing mower units pivoting unitarily relative to said tractor frame, said trailing mower units and said tractor unit defining a continuous cutting swath for all pivoted positions of said trailing frame, and second drive means on said trailing assembly and independent of said first drive means and powering said trailing mower units.
Claim 2
Dependent Claim
172 words
A lawnmower construction comprising a powered tractor including a frame supported for movement along the ground by wheels, a rotary mower unit supported by said tractor frame and located substantially midway of the width thereof, first drive means on said tractor frame powering said tractor and said mower unit, steering means on said tractor frame for controlling the direction of movement of said tractor, a trailing assembly including a rigid frame pivotally attached to the rearward portion of said tractor frame for movement about a generally vertical axis and a pair of Rotary mower units fixedly secured to said rigid frame and disposed substantially outboard of and on opposite sides of said tractor mounted mower unit, said frame and said trailing mower units pivoting unitarily relative to said tractor frame, said trailing mower units and said tractor unit defining a continuous cutting swath for all pivoted positions of said trailing frame, and second drive means on said trailing assembly and independent of said first drive means and powering said trailing mower units.
Claim 3
Dependent Claim
42 words
A construction as defined in claim 1 wherein said trailing assembly includes wheels vertically adjustable relative to said trailing frame, said trailing frame being vertically adjustable relative to said tractor frame, whereby to adjust the cutting height of said trailing mower units.
Claim 4
Dependent Claim
30 words
A construction as defined in claim 2 wherein said wheels are disposed at the rear of said trailing mower units, said trailing mower units having skids adjacent the front thereof.
Claim 5
Dependent Claim
200 words
A lawnmower construction comprising a powered tractor including a frame supported for movement along the ground by wheels, a rotary mower unit supported by said tractor frame and located substantially midway of the width thereof, first drive means on said tractor frame powering said tractor and said mower unit, steering means on said tractor frame for controlling the direction of movement of said tractor, a trailing assembly including a rigid frame pivotally attached to the rearward portion of said tractor frame for movement about a generally vertical axis, and a pair of rotary mower units fixedly secured to opposite outboard portions of said rigid trailing frame and disposed substantially outboard of and on opposite sides of said tractor mounted mower unit, said trailing frame including first and second adjustably secured members for elongating said frame and varying the spacing between said trailing mower units, said frame and said trailing mower units pivoting unitarily relative to said tractor frame, said trailing mower units and said tractor unit defining a continuous cutting swath for all pivoted positions of said trailing frame, and second drive means on said trailing assembly and independent of said first drive means and powering said trailing mower units.
Claim 6
Dependent Claim
200 words
A lawnmower construction comprising a powered tractor including a frame supported for movement along the ground by wheels, a rotary mower unit supported by said tractor frame and located substantially midway of the width thereof, first drive means on said tractor frame powering said tractor and said mower unit, steering means on said tractor frame for controlling the direction of movement of said tractor, a trailing assembly including a rigid frame pivotally attached to the rearward portion of said tractor frame for movement about a generally vertical axis, and a pair of rotary mower units fixedly secured to opposite outboard portions of said rigid trailing frame and disposed substantially outboard of and on opposite sides of said tractor mounted mower unit, said trailing frame including first and second adjustably secured members for elongating said frame and varying the spacing between said trailing mower units, said frame and said trailing mower units pivoting unitarily relative to said tractor frame, said trailing mower units and said tractor unit defining a continuous cutting swath for all pivoted positions of said trailing frame, and second drive means on said trailing assembly and independent of said first drive means and powering said trailing mower units.
Claim 7
Dependent Claim
24 words
A construction as defined in claim 4 wherein said first and second members are telescoped to form said adjustment for the trailing mower units.
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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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |