US3852944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lawn edger
Assignee: COPPER Mfg CO
•
Filing: 1973-05-07
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Granted: 1974-12-10
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Expires: 1993-05-07
Abstract
Abstract A lawn edger including a wheel frame movable over the ground is provided with gasoline powered drive means which emits exhaust gases under pressure. Rotatably carried on the frame are blade means that are adapted to be driven from the drive means. The blade means are adapted to be rotated about an axis transverse to the direction of movement of the frame. Deflector means are provided on the frame rearwardly of the blade means. A conduit connected to the muffler of the drive means conducts exhaust gases from the drive means and discharges same across the surface rearwardly of the deflector means and in front of the rear wheel means of the frame so as to blow debris thrown by the blade means and deflected by the deflector means from the surface transversely of the direction of movement of the wheeled frame.
Inventors
- 👤 W Zuercher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:34
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/835; A01D34/84
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
170 words
A lawn edger comprising a wheeled frame movable over a surface in a first direction, drive means on said frame emitting exhaust gas under pressure, blade means rotatably carried on said frame and adapted to be driven by said drive means, said blade means rotatable about a substantially horizontal axis, deflector means on said frame rearwardly of said blade means, and extending transversely of said blade means, said deflector means comprising a bracket secured to the frame and a resilient flap secured to the bracket and extending transversely relative to the frame for intercepting debris hurled rearwardly by the blade means, and conduit means having an inlet portion connected to said drive means and having a frame supported portion within an outlet for conducting exhaust gas from the driver means and discharging same across said surface rearwardly of the deflector means, whereby debris thrown by the blade means will be deflected by the deflector means to said surface and then said debris will be blown away by the exhaust gas.
Claim 2
Dependent Claim
170 words
A lawn edger comprising a wheeled frame movable over a surface in a first direction, drive means on said frame emitting exhaust gas under pressure, blade means rotatably carried on said frame and adapted to be driven by said drive means, said blade means rotatable about a substantially horizontal axis, deflector means on said frame rearwardly of said blade means, and extending transversely of said blade means, said deflector means comprising a bracket secured to the frame and a resilient flap secured to the bracket and extending transversely relative to the frame for intercepting debris hurled rearwardly by the blade means, and conduit means having an inlet portion connected to said drive means and having a frame supported portion within an outlet for conducting exhaust gas from the driver means and discharging same across said surface rearwardly of the deflector means, whereby debris thrown by the blade means will be deflected by the deflector means to said surface and then said debris will be blown away by the exhaust gas.
Claim 3
Dependent Claim
35 words
A lawn edger as in claim 1 wherein the wheeled frame has rear support wheel means, said conduit means having an outlet terminating forwardly of the axis of rotation of the rear support wheel means.
Claim 4
Dependent Claim
21 words
A lawn edger as in claim 1 wherein the lower edge of the resilient flap is in contact with the surface.
Claim 5
Dependent Claim
18 words
A lawn edger as is claim 2 wherein the conduit means is removably secured to the drive means.
Claim 6
Dependent Claim
15 words
A lawn edger as in claim 4 wherein the drive means comprises a gasoline engine.
Claim 7
Dependent Claim
90 words
A lawn edger as in claim 5 wherein the gasoline engine includes a muffler having an outlet opening therein, biasing means cooperating with said conduit means, the conduit means being biased so as to retain the inlet portion thereof in engagement with the muffler, whereby when the conduit means is in the outlet opening, exhaust gas will pass into the conduit means and be dischaRged from the outlet, said inlet portion of the conduit means being movable from said muffler to permit discharge of exhaust gas directly to the ambient.
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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) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |