Patent US3677574A successfully refreshed from Google Patents.
US3677574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for adjusting heights of cut in power mower
Assignee: Individual
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Filing: 1970-10-09
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Granted: 1972-07-18
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Expires: 1990-10-09
Abstract
Abstract A power lawn mower having a frame supported on a pair of rotatable spaced transverse shafts provided at their ends with crank arms on which supporting wheels are journaled. The shafts are linked together and one of the shafts is provided with a control lever having a dog engagable with a notched sector member on the frame to lock the mower at an adjusted cutting height.
Inventors
- 👤 Lawrence Cyr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:48
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412; A01D34/63; A01D34/74; A01D2101/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
161 words
In a power mower, a supporting frame, a pair of spaced transverse shafts rotatably connected to said frame, crank arms on the ends of said shafts, respective supporting wheels journaled to the ends of the crank arms, means to lock the transverse shafts in different rotated positions, whereby to adjust the cutting height of the power mower, and link means interconnecting said transverse shafts, wherein said link means comprises respective control arms connected to said transverse shafts and a link bar connecting said control arms, wherein one of said transverse shafts is provided with an upstanding contRol lever rigidly secured thereto, wherein the means to lock the transverse shafts is adjusted rotated position comprises interengageable locking means on said control lever and said frame, and wherein said locking means comprises a dog element on the lever and a notched sector member on the frame coaxial with said one of the said transverse shafts and being lockingly engageable by said dog element.
Claim 2
Dependent Claim
161 words
In a power mower, a supporting frame, a pair of spaced transverse shafts rotatably connected to said frame, crank arms on the ends of said shafts, respective supporting wheels journaled to the ends of the crank arms, means to lock the transverse shafts in different rotated positions, whereby to adjust the cutting height of the power mower, and link means interconnecting said transverse shafts, wherein said link means comprises respective control arms connected to said transverse shafts and a link bar connecting said control arms, wherein one of said transverse shafts is provided with an upstanding contRol lever rigidly secured thereto, wherein the means to lock the transverse shafts is adjusted rotated position comprises interengageable locking means on said control lever and said frame, and wherein said locking means comprises a dog element on the lever and a notched sector member on the frame coaxial with said one of the said transverse shafts and being lockingly engageable by said dog element.
Claim 3
Dependent Claim
28 words
The power mower of claim 1, and wherein said sector member has a peripheral flange formed with spaced notches, said dog element being selectively engagable with said notches.
Claim 4
Dependent Claim
27 words
The power mower of claim 2, and wherein said control lever is laterally flexible to allow said dog element to be at times disengaged from said notches.
Claim 5
Dependent Claim
20 words
The power mower of claim 3, and wherein said control lever is located at the rear portion of said frame.
Claim 6
Dependent Claim
38 words
The power mower of claim 4, and wherein said power mower is provided with a steering handle projecting upwardly and rearwardly from the rear end portion of said frame, said control lever being located adjacent said steering handle.
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) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |