US4550499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
String trimmer with cut line retention pocket
Assignee: MCCULLOCH A MD CORP
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Filing: 1983-07-18
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Granted: 1985-11-05
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Expires: 2003-07-18
Abstract
Abstract A flexible line vegetation trimmer is disclosed, wherein the trimmer includes a conventional line cutting element mounted for rotation about an axis to define a cutting path, a debris shield mounted above at least an arc of the cutting path, and a cutting blade on the debris shield for cutting segments from the line to reduce the line length to a predetermined distance. In this generally conventional line trimmer the present invention provides a cut line pocket mounted below the debris shield, and having the cutting blade mounted at the mouth thereof, with the cut line pocket catching the segments of line cut from the line by the cutting blade. The cut segments are trapped in the cut line pocket, thereby reducing if not eliminating the danger of the cut segments striking a person or animal in the vicinity of the operating line trimmer.
Inventors
- 👤 Alan V. Ruzicka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:31
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412; A01D34/416; A01D34/4167; A01D75/00; A01D75/20; A01D75/206
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
160 words
An apparatus for cutting vegetation and the like comprising head means rotatable about an axis in a cutting plane, flexible line member having at least one portion coiled within said head means and having at least one uncoiled portion extending outwardly of the periphery of said head means and rotating in said cutting plane, a housing means generally overlying at least an arc of the portion of said cutting plane in which said uncoiled portion rotates, and cutting means associated with said housing means and spaced from said axis in said cutting plane for trimming said line member to a predetermined length upon rotation of said head means, the improvement comprising catching means located on said housing for catching and retaining segments of said line member cut by said cutting means so that the danger of personal injury to persons in the vicinity of said apparatus when said head means is rotating and said line member is cut is reduced.
Claim 2
Independent Claim
160 words
An apparatus for cutting vegetation and the like comprising head means rotatable about an axis in a cutting plane, flexible line member having at least one portion coiled within said head means and having at least one uncoiled portion extending outwardly of the periphery of said head means and rotating in said cutting plane, a housing means generally overlying at least an arc of the portion of said cutting plane in which said uncoiled portion rotates, and cutting means associated with said housing means and spaced from said axis in said cutting plane for trimming said line member to a predetermined length upon rotation of said head means, the improvement comprising catching means located on said housing for catching and retaining segments of said line member cut by said cutting means so that the danger of personal injury to persons in the vicinity of said apparatus when said head means is rotating and said line member is cut is reduced.
Claim 3
Dependent Claim
29 words
Apparatus of claim 1 wherein said catching means is a pocket with an open end and a closed end, and said segments enter said pocket through said open end.
Claim 4
Dependent Claim
31 words
Apparatus of claim 2, wherein said closed end has a surface means extending at an angle of from 30° to 60° to said cutting plane for said segments to impinge against.
Claim 5
Dependent Claim
19 words
Apparatus of claim 3, wherein said surface means extends at an angle of about 45° to said cutting plane.
Claim 6
Dependent Claim
152 words
A vegetation trimmer comprising at least one length of flexible line, rotatable support means for revolving said line about an axis in a circular cutting plane, shield means extending over at least an arc of the circular cutting plane, cutting means associated with said shield means and spaced from said axis in said cutting plane for trimming said line to a predetermined length upon line rotation, and cut line means associated with said shield means and generally located adjacent said cutting blade means for at least reducing the velocity of segments of said line cut by said cutting blade means to the point that the danger of personal injury to persons in the vicinity of the operating trimmer is reduced by impinging the cut line segments against a plurality of surfaces of the trimmer wherein said cut line means is a pocket in said shield means for catching and retaining said segments.
Claim 7
Dependent Claim
152 words
A vegetation trimmer comprising at least one length of flexible line, rotatable support means for revolving said line about an axis in a circular cutting plane, shield means extending over at least an arc of the circular cutting plane, cutting means associated with said shield means and spaced from said axis in said cutting plane for trimming said line to a predetermined length upon line rotation, and cut line means associated with said shield means and generally located adjacent said cutting blade means for at least reducing the velocity of segments of said line cut by said cutting blade means to the point that the danger of personal injury to persons in the vicinity of the operating trimmer is reduced by impinging the cut line segments against a plurality of surfaces of the trimmer wherein said cut line means is a pocket in said shield means for catching and retaining said segments.
Claim 8
Dependent Claim
61 words
Trimmer of claim 5, wherein the pocket is open-ended with the segments entering the pocket at the open end, and the end of the pocket opposite the open end has a surface means extending at an angle of about 30° to 60° from the cutting plane for providing a surface against which the cut segments impinge and change direction of travel.
Claim 9
Dependent Claim
10 words
Trimmer of claim 6, wherein said angle is about 45°.
Claim 10
Dependent Claim
66 words
Trimmer of claim 7, wherein the pocket includes an inner wall extending generally perpendicularly to said cutting plane and closest to said axis, said open end being adjacent to the inner wall and being ahead of the inclined surface with respect to the direction of rotation of said line, said cutting blade means being associated with said inner wall at the open end of said pocket.
Claim 11
Dependent Claim
14 words
Trimmer of claim 5, wherein the surfaces extend at an angle to each other.
Claim 12
Dependent Claim
174 words
In a vegetation line trimmer of the type in which at least one line cutting element is mounted for rotation about an axis to define a cutting path, a debris shield is mounted above at least an arc of said cutting path to protect the trimmer operator from debris, and cutting means for cutting segments from said line to reduce the line length from said axis to the free end of the line to a predetermined distance are associated with the shield, the improvement comprising cut line means associated with said shield for at least reducing the velocity of cut line segments to the point such as to at least reduce the risk of personal injury to persons in the vicinity of the operating trimmer by catching the cut line segments, wherein said cut line means is a pocket having an open end and a closed end, said closed end including a rear wall, inclined to said cutting path at an angle of about 30° to 60°, against which the cut line segments impinge.
Claim 13
Dependent Claim
174 words
In a vegetation line trimmer of the type in which at least one line cutting element is mounted for rotation about an axis to define a cutting path, a debris shield is mounted above at least an arc of said cutting path to protect the trimmer operator from debris, and cutting means for cutting segments from said line to reduce the line length from said axis to the free end of the line to a predetermined distance are associated with the shield, the improvement comprising cut line means associated with said shield for at least reducing the velocity of cut line segments to the point such as to at least reduce the risk of personal injury to persons in the vicinity of the operating trimmer by catching the cut line segments, wherein said cut line means is a pocket having an open end and a closed end, said closed end including a rear wall, inclined to said cutting path at an angle of about 30° to 60°, against which the cut line segments impinge.
Claim 14
Dependent Claim
10 words
Trimmer of claim 10, wherein said angle is about 45°.
Claim 15
Dependent Claim
20 words
Trimmer of claim 10, wherein the debris shield is mounted above a cutting path arc of no greater than 90°.
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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) | 1988-11-04 | 1989-05-06 | 1989-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-04 | 1993-05-06 | 1993-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-04 | 1997-05-06 | 1997-11-05 | $7700.00 | Window Closed / Lapsed |