US4043103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lawn edger accessory
Assignee: Individual
•
Filing: 1976-03-15
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Granted: 1977-08-23
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Expires: 1996-03-15
Abstract
Abstract An improved cutter assembly adapted for use with a rotary edger comprising a circular spool for storing peripherally thereon a plurality of plastic filaments, such spool being receivable within a circular retainer which in turn is provided with a plurality of radially extending peripheral openings formed to direct the corresponding filaments to the exterior of the retainer. The spool and the retainer are secured for rotation on the mounting arbor of the rotary device, the retainer furthermore including an exteriorly directed peripheral groove around the circumference thereof arranged to include the filament openings. The spool itself includes a plurality of filament securing openings to facilitate assembly. In an alternative embodiment, the exterior face of the spool is cut out with a plurality of radial notches through which the filaments are passed to permit insertion of the spool into the retainer. The retainer is similarly provided with equally displaced longitudinal notches through which the filaments are deployed into the radial openings.
Inventors
- 👤 George W. Lakin
- 👤 Robert L. Lakin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:37
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412; A01D34/416
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
148 words
A rotary cutter assembly adapted for attachment to an arbor driven in rotation, comprising: a circular spool adapted for mounting on said arbor and including a storage groove around the periphery thereof, a circular cavity concentrically disposed on the interior of said groove, and a plurality of openings disposed to radially communicate between said cavity and said storage groove; a plurality of plastic filaments each terminating in one enlarged bulbous end, each said filament being conformed in section for receipt in said openings with said bulbous end disposed in said circular cavity; and an annular retainer adapted for mounting on said arbor in concentric alignment around said spool including a stress relief groove formed on the exterior periphery thereof and a plurality of filament receiving bores communicating between said stress relieving groove and said spool for conveying said filaments from said spool to the exterior of said retainer.
Claim 2
Dependent Claim
148 words
A rotary cutter assembly adapted for attachment to an arbor driven in rotation, comprising: a circular spool adapted for mounting on said arbor and including a storage groove around the periphery thereof, a circular cavity concentrically disposed on the interior of said groove, and a plurality of openings disposed to radially communicate between said cavity and said storage groove; a plurality of plastic filaments each terminating in one enlarged bulbous end, each said filament being conformed in section for receipt in said openings with said bulbous end disposed in said circular cavity; and an annular retainer adapted for mounting on said arbor in concentric alignment around said spool including a stress relief groove formed on the exterior periphery thereof and a plurality of filament receiving bores communicating between said stress relieving groove and said spool for conveying said filaments from said spool to the exterior of said retainer.
Claim 3
Dependent Claim
25 words
Apparatus according to claim 1 further comprising: threadable engagement means connected to said arbor for selectively securing in rotation said spool and said retainer thereto.
Claim 4
Dependent Claim
27 words
Apparatus according to claim 2 wherein: said spool is selectively rotatable on said arbor relative to said retainer for winding up said filaments onto said storage groove.
Claim 5
Dependent Claim
43 words
Apparatus according to claim 3 wherein: said arbor includes a threaded stud extending to engage said spool and said threadable engagement means includes a wing nut adapted for threaded engagement with said stud and conformed for receipt within said cavity in said spool.
Claim 6
Dependent Claim
29 words
Apparatus according to claim 4 wherein: said spool and retainer each include a central bore adapted for mounting on said stud to be selectively secured by said wing nut.
Claim 7
Dependent Claim
197 words
A rotary cutter assembly adapted for attachment to an arbor driven in rotation, comprising: a circular spool adapted for mounting on said arbor and including a storage groove around the periphery thereof bounded by two annular concentric surfaces, a circular cavity concentrically disposed within said spools and one of said annular surfaces, a plurality of openings disposed to radially communicate between said cavity and said storage groove and a plurality of radial cutouts formed in the exterior peripheral edge of one of said annular surfaces; a plurality of plastic filaments each terminating in one enlarged bulbous end, each said filament being conformed in section for receipt in said openings, with said bulbous end disposed in said circular cavity each said plastic filament being dimensioned for interference fit in said cutouts; and an annular retainer adapted for mounting on said arbor in concentric alignment around said spool including a relief groove formed on the exterior periphery thereof, a plurality of filament receiving bores communicating between said relief groove and said spool and a plurality of longitudinal slots extending partly across said retainer to communicate with said receiving bores for conveying said filaments from said cutouts into said bores.
Claim 8
Dependent Claim
197 words
A rotary cutter assembly adapted for attachment to an arbor driven in rotation, comprising: a circular spool adapted for mounting on said arbor and including a storage groove around the periphery thereof bounded by two annular concentric surfaces, a circular cavity concentrically disposed within said spools and one of said annular surfaces, a plurality of openings disposed to radially communicate between said cavity and said storage groove and a plurality of radial cutouts formed in the exterior peripheral edge of one of said annular surfaces; a plurality of plastic filaments each terminating in one enlarged bulbous end, each said filament being conformed in section for receipt in said openings, with said bulbous end disposed in said circular cavity each said plastic filament being dimensioned for interference fit in said cutouts; and an annular retainer adapted for mounting on said arbor in concentric alignment around said spool including a relief groove formed on the exterior periphery thereof, a plurality of filament receiving bores communicating between said relief groove and said spool and a plurality of longitudinal slots extending partly across said retainer to communicate with said receiving bores for conveying said filaments from said cutouts into said bores.
Claim 9
Dependent Claim
29 words
Apparatus according to claim 6 wherein: said spool is selectively rotatable on said arbor relative said retainer for staggering the alignment of said radial cutouts relative said longitudinal slots.
Claim 10
Dependent Claim
67 words
Apparatus according to claim 7 wherein: said arbor includes a threaded stud extending to engage said spool and said threadable engagement means includes a wing nut adapted for threaded engagement with said stud and conformed for receipt within said cavity in said spool; and said spool and retainer each include a central bore adapted for mounting on said stud to be selectively secured by said wing nut.
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) | 1980-08-22 | 1981-02-21 | 1981-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-22 | 1985-02-21 | 1985-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-22 | 1989-02-21 | 1989-08-23 | $7700.00 | Window Closed / Lapsed |