US4282653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutting element for vegetation line trimmers
Assignee: Toro Co
•
Filing: 1979-01-15
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Granted: 1981-08-11
•
Expires: 1999-01-15
Abstract
Abstract A discrete cutting element (18) including a plurality of cutting filaments (26) for use in a vegetation line trimmer (10). In a preferred embodiment provided filaments (26) emanate from a common locus (27) at a filament holder (16) for rotation about the holder's axis of rotation. Certain embodiments can include axially fixed apparatus for conducting the associated filaments (26) away from a spool-like member (23) around which the filaments (26) are wound, and aiding divergence of the filaments.
Inventors
- 👤 Robert C. Comer
- 👤 Henry B. Tillotson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:22
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412; A01D34/416; A01D34/4168
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
73 words
A cutting assembly for use in a vegetation line trimmer, comprising: a filament holder mounted to the vegetation line trimmer for rotation about an axis; and a plurality of associated cutting filaments the free ends of which emanate from a common situs at the outer surface of said filament holder, said plurality of filaments disposed for radial extension from said outer surface when said filament holder is made to rotate about said axis.
Claim 2
Dependent Claim
73 words
A cutting assembly for use in a vegetation line trimmer, comprising: a filament holder mounted to the vegetation line trimmer for rotation about an axis; and a plurality of associated cutting filaments the free ends of which emanate from a common situs at the outer surface of said filament holder, said plurality of filaments disposed for radial extension from said outer surface when said filament holder is made to rotate about said axis.
Claim 3
Dependent Claim
25 words
The cutting assembly of claim 1 wherein each of said plurality of associated filaments is circular in cross-section, each having substantially the same cross-sectional diameter.
Claim 4
Dependent Claim
33 words
The cutting assembly of claim 2 wherein the aggregate cross-sectional area of said plurality of associated filaments approximates the cross-sectional area of a single filament having a cross-sectional diameter of substantially 0.060 inches.
Claim 5
Dependent Claim
72 words
In a vegetation line trimmer of the type in which a line cutting element is mounted for rotation about an axis to define a cutting path, an improved cutting assembly, comprising a cutting element having a plurality of associated discrete cutting filaments, source ends of each of said filaments extending radially from a common angular locus spaced from said axis, to cooperate with one another in operation in the cutting of vegetation.
Claim 6
Dependent Claim
72 words
In a vegetation line trimmer of the type in which a line cutting element is mounted for rotation about an axis to define a cutting path, an improved cutting assembly, comprising a cutting element having a plurality of associated discrete cutting filaments, source ends of each of said filaments extending radially from a common angular locus spaced from said axis, to cooperate with one another in operation in the cutting of vegetation.
Claim 7
Dependent Claim
25 words
The cutting assembly of claim 4 further comprising a directing support, spaced radially from the axis of rotation, by which said common locus is defined.
Claim 8
Dependent Claim
34 words
The cutting assembly of claim 5 wherein said directing support comprises a generally cylindrical wall having formed therein filament conducting means fixed axially with respect to the axis of rotation of the cutting element.
Claim 9
Dependent Claim
24 words
The cutting assembly of claim 6 wherein said filament conducting means comprises a unitary aperture through which said plurality of associated cutting filaments extend.
Claim 10
Dependent Claim
38 words
The cutting assembly of claim 6 wherein said filament conducting means comprises a plurality of proximately located apertures formed in said wall at spaced intervals from one another, each of said filaments extending through one of said apertures.
Claim 11
Dependent Claim
27 words
The cutting assembly of claim 8 wherein a line defined by the centers of said apertures is oriented perpendicular to the axis about which said filaments rotate.
Claim 12
Dependent Claim
28 words
The cutting assembly of claim 8 wherein a line defined by the centers of said apertures is oriented substantially parallel to the axis about which said filaments rotate.
Claim 13
Dependent Claim
29 words
The cutting assembly of claim 8 wherein a line defined by the centers of said apertures is oriented oblique with respect to the axis about which said filaments rotate.
References Cited (Backward Citations)
US2984053A
Cited
US2663137A
Cited
US3708967A
Cited
US4024635A
Cited
US4062115A
Cited
US4137694A
Cited
US4186239A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-10 | 1985-02-09 | 1985-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-10 | 1989-02-09 | 1989-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-10 | 1993-02-09 | 1993-08-11 | $7700.00 | Window Closed / Lapsed |