Patent US3684028A successfully refreshed from Google Patents.
US3684028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grass edger with one-piece cutter bar collar
Assignee: Individual
•
Filing: 1970-11-17
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Granted: 1972-08-15
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Expires: 1990-11-17
Abstract
Abstract A grass cutting head having a driving shaft mounting axially spaced flange and plate components. Angularly spaced collars re rotatably supported between the flange and plate components. Each collar is fabricated from a single unit having a slotted head portion and an integrally connected shank portion which is received in a corresponding aperture in the flange component. A radially extending nail is received in the slotted portion of each collar. The nail serves as a cutting bar and is maintained in the slotted portion by the plate component which is removably positioned against the slotted portion of the collar. The nails may be replaced by moving the plate component away from the slotted portion of the collar.
Inventors
- 👤 Howard H Crawford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:38
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/835; A01D34/84; A01D34/01; A01D34/412; A01D34/42; A01D34/52; F; F16; F16B; F16B2200/00; F16B2200/69; Y; Y10; Y10T; Y10T403/00; Y10T403/34; Y10T403/341; Y10T403/342; Y10T83/00; Y10T83/768; Y10T83/929; Y10T83/9372; Y10T83/9457; Y10T83/9464
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
208 words
A rotary cutting head for a lawn edger having an output shaft comprising a peripheral flange stationarily mounted on the shaft, a plate carried by said shaft and movable toward and away from the flange, a plurality of radially extending cutting elements having an inner end disposed between the flange and the plate, and mounting means for the cutting elements carried by said shaft, said mounting means extending toward the plate and engaged by the plate for retaining the cutting elements on the mounting means, each of said cutting elements having a headed inner end, said mounting means including slot means open toward the plate for receiving the headed inner end of the cutting elements whereby the plate when engaged with the mounting means will retain the cutting elements on the mounting means, said mounting means being in the form of a collar having a substantially cylindrical body with an axial extension of reduced diameter on one end thereof, said flange including a plurality of equally spaced circumferentially arranged apertures therein rotatably receiving the axial extensions, each axial extension having a groove therein, and a spring ring engaged with the groove for detachably mounting the collar on the flange, said body and axial extension being of one-piece construction.
Claim 2
Dependent Claim
208 words
A rotary cutting head for a lawn edger having an output shaft comprising a peripheral flange stationarily mounted on the shaft, a plate carried by said shaft and movable toward and away from the flange, a plurality of radially extending cutting elements having an inner end disposed between the flange and the plate, and mounting means for the cutting elements carried by said shaft, said mounting means extending toward the plate and engaged by the plate for retaining the cutting elements on the mounting means, each of said cutting elements having a headed inner end, said mounting means including slot means open toward the plate for receiving the headed inner end of the cutting elements whereby the plate when engaged with the mounting means will retain the cutting elements on the mounting means, said mounting means being in the form of a collar having a substantially cylindrical body with an axial extension of reduced diameter on one end thereof, said flange including a plurality of equally spaced circumferentially arranged apertures therein rotatably receiving the axial extensions, each axial extension having a groove therein, and a spring ring engaged with the groove for detachably mounting the collar on the flange, said body and axial extension being of one-piece construction.
Claim 3
Dependent Claim
54 words
The structure as defined in claim 1 wherein said body includes intersecting slots defining the slot means therein, said cutting elements being in the form of nails having a headed end with the shank of the nails being received in one slot and the head of the nail being received in an intersecting slot.
Claim 4
Dependent Claim
38 words
The structure as defined in claim 1 wherein said mounting means are radially mounted on said flange so that rotation of the flange and shaft will cause the cutting elements to extend radially from the flange and plate.
Claim 5
Dependent Claim
173 words
A mounting collar for headed, rod-like cutting bars carried by a rotary cutting head of a lawn edger, said mounting collar comprising a body having axially extending mounting means at one end thereof, the other end of said body having intersecting slots extending longitudinally inwardly from the end of the body, said slots being in substantially perpendicular relation to each other and in intersecting relation to each other whereby one slot receives the radially extending shank of a cutting bar while the other slot receives the headed end thereof, said body being substantially cylindrical, said mounting means being in the form of a cylindrical extension adapted to exteNd through an aperture in the rotary cutting head, the cylindrical extension being of lesser diameter than the cylindrical body whereby the cylindrical body will engage the mounting flange, the other end of the cylindrical extension having a peripheral groove therein receiving a spring ring to rotatably retain the cylindrical extension in the mounting flange to enable movement of the mounting collar about a longitudinal axis.
Claim 6
Dependent Claim
173 words
A mounting collar for headed, rod-like cutting bars carried by a rotary cutting head of a lawn edger, said mounting collar comprising a body having axially extending mounting means at one end thereof, the other end of said body having intersecting slots extending longitudinally inwardly from the end of the body, said slots being in substantially perpendicular relation to each other and in intersecting relation to each other whereby one slot receives the radially extending shank of a cutting bar while the other slot receives the headed end thereof, said body being substantially cylindrical, said mounting means being in the form of a cylindrical extension adapted to exteNd through an aperture in the rotary cutting head, the cylindrical extension being of lesser diameter than the cylindrical body whereby the cylindrical body will engage the mounting flange, the other end of the cylindrical extension having a peripheral groove therein receiving a spring ring to rotatably retain the cylindrical extension in the mounting flange to enable movement of the mounting collar about a longitudinal axis.
Claim 7
Dependent Claim
45 words
The mounting collar as defined in claim 4 together with a double headed nail serving as the cutting bar, the inner head on the nail being received in said one slot and the outer head on the nail engaging the peripheral surface of the body.
Claim 8
Dependent Claim
160 words
A rotary cutting head comprising a rotary shaft, a first plate mounted on said shaft, a second plate mounted on said shaft, a plurality of radially extending cutting elements each having an inner end disposed between said plates, mounting means for the cutting elements carried by one of said plates and extending toward the other of said plates, said plates being mounted on said shaft for relative movement toward and away from each other, said mounting means including a body rotatably mounted on one of said plates, slot means in said body opening radially thereof and axially thereof toward the other plate whereby the other plate will close the axially opening slot means when in engagement with the body, each cutting element including a cutter member having a headed end, said cutter member extending radially from the radially opening slot means in the body with the headed end engaging the body and preventing radial outward movement of the cutting member.
Claim 9
Dependent Claim
160 words
A rotary cutting head comprising a rotary shaft, a first plate mounted on said shaft, a second plate mounted on said shaft, a plurality of radially extending cutting elements each having an inner end disposed between said plates, mounting means for the cutting elements carried by one of said plates and extending toward the other of said plates, said plates being mounted on said shaft for relative movement toward and away from each other, said mounting means including a body rotatably mounted on one of said plates, slot means in said body opening radially thereof and axially thereof toward the other plate whereby the other plate will close the axially opening slot means when in engagement with the body, each cutting element including a cutter member having a headed end, said cutter member extending radially from the radially opening slot means in the body with the headed end engaging the body and preventing radial outward movement of the cutting member.
Claim 10
Dependent Claim
78 words
The structure as defined in claim 6 wherein said mounting means for the cutting elements each includes a body having a substantially cylindrical axial extension extending axially away from the other plate, said one plate including a plurality of circumferentially spaced apertures therein rotatably receiving the axial extensions, means axially retaining the axial extensions rotatably within the apertures so that rotation of the shaft will cause the cutting elements to extend radially from the periphery of the plates.
Claim 11
Dependent Claim
71 words
The structure as defined in claim 7 wherein one of said plates is fixed rigidly on the shaft, the other of said plates being axially movable on the shaft, and spring means biasing the axially movable plate toward the stationary plate and the mounting means thereon for retaining the cutter members in the slot means thereby enabling replacement of the cutting elements by moving the movable plate axially of the shaft.
Claim 12
Dependent Claim
65 words
The structure as defined in claim 7 wherein one of said plates is stationarily mounted on the shaft, the other plate being screw-threadedly engaged with thread means on said shaft whereby relative rotation between the plates will move the movable plate toward and away from the mounting means for removably retaining the headed end of the cutting elements in the slot means in the body.
Claim 13
Dependent Claim
45 words
The structure as defined in claim 7 wherein said slot means includes intersecting slots extending longitudinally inwardly from the end of the body remote from the axial extension, one of said slots receiving the cutting member with the other slot receiving the headed end thereof.
Claim 14
Dependent Claim
120 words
The structure as defined in claim 10 wherein the slot receiving the headed end is recessed beyond the depth of the slot receiving the cutting member to enable the cutting member to engage the axial inner end of the longitudinal slot with the headed end of the cutting member received in the recess to enable the cutting element to be radially disposed, said axial extension on the body being of reduced cross-sectional dimension to define a shoulder to engage the plate adjacent the aperture therein, said means retaining the axial extension on the plate including a peripheral groove on the axial extension, and a spring ring received in the groove and engaging the plate in opposed relation to the shoulder.
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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) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |