US4362007A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutting head assembly for a rotary motor
Assignee: Individual
•
Filing: 1981-06-24
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Granted: 1982-12-07
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Expires: 2001-06-24
Abstract
Abstract A cutting head assembly for a rotary motor is disclosed characterized by a flat disc member having a plurality of holes which are provided with a leading edge. A plurality of radially disposed holes are provided for insertion of a monofilament line which is the cutting element. A bar support is provided to prevent the accidental dislodging of the monofilament line.
Inventors
- 👤 Merrill V. Kennedy
- 👤 Howard E. Richards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:33
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412; A01D34/416; A01D34/4168; A01D34/4166
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
127 words
A rotary mower cutting head assembly comprising: a disc having a smooth closed periphery, a plurality of longitudinally extending openings, and a plurality of radially extending openings; a plurality of monofilament elements having an elongated portion and a wider head portion, said monofilament elements adapted to be inserted into the radial openings on said disc; a smooth contour channel disposed on the periphery of the disc at the radial openings; a plurality of retaining members disposed in between the radially extending openings and the center of the disc whereby inward travel of the monofilament element will be restricted; and a plurality of curved vanes disposed on said disc in a substantially radial position, whereby the vanes create an upward flow of air through the longitudinally extending openings.
Claim 2
Dependent Claim
127 words
A rotary mower cutting head assembly comprising: a disc having a smooth closed periphery, a plurality of longitudinally extending openings, and a plurality of radially extending openings; a plurality of monofilament elements having an elongated portion and a wider head portion, said monofilament elements adapted to be inserted into the radial openings on said disc; a smooth contour channel disposed on the periphery of the disc at the radial openings; a plurality of retaining members disposed in between the radially extending openings and the center of the disc whereby inward travel of the monofilament element will be restricted; and a plurality of curved vanes disposed on said disc in a substantially radial position, whereby the vanes create an upward flow of air through the longitudinally extending openings.
Claim 3
Dependent Claim
12 words
The cutting head assembly of claim 1 wherein said disc is circular.
Claim 4
Dependent Claim
17 words
The cutting head assembly of claim 1 wherein said disc is molded out of a plastic material.
Claim 5
Dependent Claim
30 words
The rotary mower cutting head assembly of claim 1 wherein said plurality of monofilament elements comprises four monofilament elements disposed at 90° interval relative to the center of said disc.
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) | 1985-12-06 | 1986-06-07 | 1986-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-06 | 1990-06-07 | 1990-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-06 | 1994-06-07 | 1994-12-07 | $7700.00 | Window Closed / Lapsed |