Patent US3759020A successfully refreshed from Google Patents.
US3759020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grass clipper
Assignee: BURGESS PRODUCTS Inc
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Filing: 1972-07-31
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Granted: 1973-09-18
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Expires: 1992-07-31
Abstract
Abstract A motor driven hand operated grass clipper for lawn trimming has a knife blade arranged for rotation between a pair of fixed grass combs. Grass accumulation at the hub of the rotor is avoided by the provision of a solid circular central area which may be a separate disk and which limits the blade cutting edges to the end portions only and throws out clippings that might otherwise wind around the rotating mechanism. An extension handle and a skid attachment are provided.
Inventors
- 👤 F Simmons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:35
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412; A01D34/63; A01D2101/00; Y; Y10; Y10S; Y10S30/00; Y10S30/01; Y10S30/05
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
114 words
In a grass clipper having a horizontal rotor equipped with cutter blades and driven by a motor, the improvement wherein the rotor comprises a hub fixed upon the drive shaft of the motor, a disk adjacent said hub and disposed in a plane normal to the drive shaft, said disk having a solid peripheral portion extending outwardly from said hub, a cutter blade adjacent said hub and disk projecting outwardly beyond the periphery of said disk, and a pair of similarly oriented parallel stationary combs spaced respectively above and below the plane of said cutter blade, the spaces between the teeth of said combs extending inwardly at least to the periphery of said disk.
Claim 2
Dependent Claim
114 words
In a grass clipper having a horizontal rotor equipped with cutter blades and driven by a motor, the improvement wherein the rotor comprises a hub fixed upon the drive shaft of the motor, a disk adjacent said hub and disposed in a plane normal to the drive shaft, said disk having a solid peripheral portion extending outwardly from said hub, a cutter blade adjacent said hub and disk projecting outwardly beyond the periphery of said disk, and a pair of similarly oriented parallel stationary combs spaced respectively above and below the plane of said cutter blade, the spaces between the teeth of said combs extending inwardly at least to the periphery of said disk.
Claim 3
Dependent Claim
27 words
A clipper in accordance with claim 1 wherein the disk is fastened to the bottom of the hub and the cutter blade is fastened to said disk.
Claim 4
Dependent Claim
68 words
A clipper in accordance with claim 2 wherein the disk has a central hole therein equal in diameter to the diameter of the hub and a diametrical bar integral with said disk spanning said hole, said hub having a diametrical groove in the bottom thereof adapted to receive said bar, and screws fastening the cutter blade to said bar of said disk and said bar to said hub.
Claim 5
Dependent Claim
26 words
Structure in accordance with claim 3 wherein the cutter blade is a single flat blade having its respective ends projecting beyond the periphery of the disk.
Claim 6
Dependent Claim
31 words
Structure in accordance with claim 4 wherein the cutter blade is provided with cutting edges along both sides thereof whereby it can be turned over to present new grass cutting edges.
Claim 7
Dependent Claim
45 words
A clipper in accordance with claim 1 wherein the combs are identical and the respective teeth thereof are in vertical alignment whereby to provide vertical guideways therebetween for guidling grass stalks and the like to the cutting zone and holding the same to facilitate cutting.
Claim 8
Dependent Claim
53 words
A clipper in accordance with claim 3 wherein the lower comb is integral with a plate which extends rearwardly therefrom under the disk and blade structure, said plate having a hole therein concentric with said disk for escape of grass clippings and access to the screws which fasten the blade to said disk.
Claim 9
Dependent Claim
101 words
A clipper in accordance with claim 1 wherein the upper comb is integral with a plate which extends rearwardly therefrom and terminates in a tongue having converging side edges, an extension handle having a pair of wheels mounted at the bottom end thereof and a connection plate extending forwardly of said wheels, said connection plate having ways diverging forwardly and adapted to receive said tongue snugly therein and overlying said connection plate, said tongue and said connection plate having aligned holes therein, and a spring mounted releasable catch extending through both said holes to lock said extension handle to said clipper.
Claim 10
Dependent Claim
80 words
Structure in accordance with claim 8 wherein the spring carrying the releasable catch comprises a leaf spring secured at one end to the forward end of the connection plate and the distal end thereof curves around the axle of the pair of wheels in spaced relation thereto wherely said catch may be released by downward movement of said distal end of said leaf spring which movement is limited by engagement of said distal end of said spring with said axle.
Claim 11
Dependent Claim
83 words
A clipper in accordance with claim 8 and including an electric motor and batteries to power the same and switch means to control said motor all mounted in the clipper structure, the extension handle having similar switch means mounted therein, and electric connection means including male and female socket elements mounted respectively in said clipper structure and in said handle extension for connecting said two switch means in parallel whereby said motor may be controlled by said switch means in said extension handle.
Claim 12
Dependent Claim
37 words
A grass clipper comprising a housing having the structure of claim 1 mounted therein and a skid detachably supported by said housing and arranged under said clipper to support the same a predetermined distance above the ground.
Claim 13
Dependent Claim
57 words
Structure in accordance with claim 11 wherein the skid comprises spring wire runners curving upwardly at their forward ends then rearwardly into the housing, said housing having socket means for receiving and holding the end portions of the respective runners, the rear end of the skid including a hook which engages clipper structure with releasable spring pressure.
Claim 14
Dependent Claim
106 words
In a grass clipper having cutting means, an electric motor drivingly connected with said cutting means, and an electric switch connected with said motor for turning it off or on, all mounted in a housing, the improvement which comprises an extension handle having a pair of wheels mounted at the bottom end thereof, means for demountably attaching said handle to the clipper housing, an electric switch mounted in the top part of said handle, and means for electrically connecting said handle switch in parallel with the switch mounted in the clipper housing whereby the clipper may be guided and operated by a person in standing position.
Claim 15
Dependent Claim
106 words
In a grass clipper having cutting means, an electric motor drivingly connected with said cutting means, and an electric switch connected with said motor for turning it off or on, all mounted in a housing, the improvement which comprises an extension handle having a pair of wheels mounted at the bottom end thereof, means for demountably attaching said handle to the clipper housing, an electric switch mounted in the top part of said handle, and means for electrically connecting said handle switch in parallel with the switch mounted in the clipper housing whereby the clipper may be guided and operated by a person in standing position.
Claim 16
Dependent Claim
101 words
Structure in accordance with claim 13 wherein the housing has mounted therein a plate which extends rearwardly from said housing and terminates in a tongue having converging side edges and the means for demountably attaching the extension handle to the clipper housing comprises a connection plate extending forwardly of the wheels, said connection plate having ways diverging forwardly and adapted to receive said tongue snugly therein and overlying said connection plate, said tongue and said connection plate having aligned holes therein, and a spring-mounted releasable catch extending through both of said holes to lock said extension handle to the clipper housing.
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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) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |