US3732673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor drive for a lawn mower
Assignee: Individual
•
Filing: 1971-07-27
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Granted: 1973-05-15
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Expires: 1991-07-27
Abstract
Abstract A motor is clamped on a fixed shaft extending between the wheels of a lawn mower. A belt is entrained about both a drive or first pulley on the motor shaft and a driven or second pulley on a rotary reel shaft that also extends between the wheels. An idler pulley is mounted on a shaft attached to the outer housing or frame such that the belt may be tightened by adjusting the clamp that secures the motor to the fixed shaft. The second pulley can be drivingly attached to the reel shaft by various means such as radial set screws disposed in a hub of the pulley and/or a protuberance formed on the pulley for cooperative engagement with the cutting reel of the mower to thereby turn the shaft and reel. Two unidirectional clutches (a right and a left) are arranged and oriented such that reel rotation in a forward direction will drive the wheels in a forward direction.
Inventors
- 👤 L Winn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:02
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412; A01D34/42; A01D34/46; A01D34/47; A01D34/475; A01D2101/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
196 words
In combination with a handle-equipped hand mower having spaced apart gear housing members, wheel structures rotatably supported with respect to said gear housing members, a fixed shaft extending between and rigidly attached to said gear housing members, an axially extending reel shaft drivingly connnected adjacent the ends thereof with said wheel structures, and a cutting reel mounted upon said reel shaft and equipped with a plurality of angularly separated cutting blades spaced outwardly from said reel shaft and extending generally therealong into adjacency with said gear housing members but terminating spaced distances therefrom: a drive pulley coaxially circumjacent said reel shaft intermediate portions of one gear housing member and the adjacent ends of said cutting blades and having a diameter at least as large as the inner diameter of said cutting blades; at least one protuberance carried by said drive pulley a spaced distance outwardly from said reel shaft in general alignment with one of said cutting blades and engageable therewith for transmitting torque from said drive pulley to said cutting reel; a motor mounted on said fixed shaft and having an output pulley; and an endless belt entrained about said pulleys to transmit power therebetween.
Claim 2
Dependent Claim
196 words
In combination with a handle-equipped hand mower having spaced apart gear housing members, wheel structures rotatably supported with respect to said gear housing members, a fixed shaft extending between and rigidly attached to said gear housing members, an axially extending reel shaft drivingly connnected adjacent the ends thereof with said wheel structures, and a cutting reel mounted upon said reel shaft and equipped with a plurality of angularly separated cutting blades spaced outwardly from said reel shaft and extending generally therealong into adjacency with said gear housing members but terminating spaced distances therefrom: a drive pulley coaxially circumjacent said reel shaft intermediate portions of one gear housing member and the adjacent ends of said cutting blades and having a diameter at least as large as the inner diameter of said cutting blades; at least one protuberance carried by said drive pulley a spaced distance outwardly from said reel shaft in general alignment with one of said cutting blades and engageable therewith for transmitting torque from said drive pulley to said cutting reel; a motor mounted on said fixed shaft and having an output pulley; and an endless belt entrained about said pulleys to transmit power therebetween.
Claim 3
Dependent Claim
69 words
The combination of claim 1 and further comprising an idler pulley supported by said motor in generally planar alignment with said output pulley and having said belt entrained thereabout, and clamp means adjustably securing said motor to said fixed shaft in any desired axial and rotational position thereon, whereby said idler pulley is operable to adjust tightness of said belt by rotatably positioning said motor on said fixed shaft.
Claim 4
Dependent Claim
68 words
The combination of claim 1 wherein said drive pulley includes a central hub containing a large opening passing said reel shaft therethrough, and a plurality of angularly spaced set screws positioned in said hub and adjustable with respect thereto for securing the same to a member passing through said opening, adjustment of said set screws enabling said drive pulley to be mounted on shaft members of varying diameters.
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) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |