US4351143A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ground support system for a grass cutting machine
Assignee: Black and Decker Inc
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Filing: 1981-04-30
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Granted: 1982-09-28
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Expires: 2001-04-30
Abstract
Abstract A three point ground support system for a grass cutting machine having two rear wheels and a front roller of sufficient width to minimize the rolling resistance and provide a sufficiently stable support to produce a level cut. The two rear wheels are mounted inboard of the cutting circle but rearwardly thereof. Only the front roller is within the cutting circle and below the cutting plane of the cutting blades. The support brackets for the roller have a portion outside the cutting circle. The cutting circle of the cutting blades permits visible front and side cutting, and may be combined with a deflectable cutting blade.
Inventors
- 👤 William R. Lessig, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:31
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412; A01D34/63; A01D34/82; A01D2101/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
178 words
A grass cutting machine having a motor powered cutting blade defining a cutting circle lying in a substantially horizontal plane, the machine comprising: (a) a housing carrying the motor and to journal the cutting blade in a substantially vertical axis, (b) the housing having a front, a rear, and opposed sides extending therebetween to terminate at right and left front corners and right and left rear corners, (c) the front and opposed sides of the housing each having substantial portions thereof within the cutting circle, (d) a pair of wheels journaled at opposite sides of the rear of the housing with their axes disposed above the plane of the cutting circle. (e) a roller disposed below the plane of the cutting circle and within the cutting circle to extend longitudinally across the front of the housing, and (f) support means journaling the roller, and extending therefrom within the cutting circle and below the cutting plane to intersect the cutting plane outside of the cutting circle adjacent the front corners for connection to the housing above the cutting plane.
Claim 2
Dependent Claim
178 words
A grass cutting machine having a motor powered cutting blade defining a cutting circle lying in a substantially horizontal plane, the machine comprising: (a) a housing carrying the motor and to journal the cutting blade in a substantially vertical axis, (b) the housing having a front, a rear, and opposed sides extending therebetween to terminate at right and left front corners and right and left rear corners, (c) the front and opposed sides of the housing each having substantial portions thereof within the cutting circle, (d) a pair of wheels journaled at opposite sides of the rear of the housing with their axes disposed above the plane of the cutting circle. (e) a roller disposed below the plane of the cutting circle and within the cutting circle to extend longitudinally across the front of the housing, and (f) support means journaling the roller, and extending therefrom within the cutting circle and below the cutting plane to intersect the cutting plane outside of the cutting circle adjacent the front corners for connection to the housing above the cutting plane.
Claim 3
Dependent Claim
53 words
The combination claimed in claim 1 wherein: (a) the support means defining a pair of "L" shaped rods having one end thereof journaling the roller from opposite ends along an axis parallel to the axis of the rear wheels, and the other end thereof affixed to the housing parallel to the sides thereof.
Claim 4
Dependent Claim
29 words
The combination claimed in claim 2 wherein: (a) each of the support rods having an angled section intermediate its ends whereby any build up of grass cuttings is minimized.
Claim 5
Dependent Claim
48 words
The combination claimed in claim 1 wherein: (a) the right and left front corners of the housing and the rear thereof lie outside of the cutting circle, and (b) the support means intersect the cutting plane at the right and left front corners outside of the cutting circle.
Claim 6
Dependent Claim
56 words
The combination claimed in claim 4 wherein: (a) insets formed at opposite corners of the rear of the housing inwardly of the sides thereof and disposed outside the cutting circle, and (b) the wheels mounted to the housing within the insets whereby the wheels will not interfere with the cutting on either side of the housing.
Claim 7
Dependent Claim
30 words
The combination claimed in claim 5 wherein: (a) the roller disposed in front of the vertical axis of the cutting blade with the front of the housing in superposition thereto.
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) | 1985-09-27 | 1986-03-29 | 1986-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-27 | 1990-03-29 | 1990-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-27 | 1994-03-29 | 1994-09-28 | $7700.00 | Window Closed / Lapsed |