US3818686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lawn mower propelling drive
Assignee: Jacobsen Manufacturing Co
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Filing: 1973-01-15
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Granted: 1974-06-25
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Expires: 1993-01-15
Abstract
Abstract A rotary lawn mower propelling drive wherein the mower has a housing supported by ground wheels which are propelled through the means of a prime mover, such as a gasoline engine. A drive belt extends from the engine and to a drive disc which is in rolling contact with a drive wheel which in turn is geared to a drive shaft connected to the powered ground wheels. The drive disc is a rubber or like material on the face which is in rolling contact with the drive wheel which is of a hard material, such as metal. The drive disc is movable across the plane of the drive wheel so that variable drive speeds can be achieved, and the drive disc is also movable away from rolling engagement with the drive wheel for selective disengaging of the drive. Controls are provided for both the variable speed and the disengagement mentioned. Further, the mower housing itself has a gear box integral therewith, and gears are rotatably supported in the integral gear box.
Inventors
- 👤 D Haffner
- 👤 D Erickson
- 👤 N Woelffer
- 👤 C Wuerker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:44
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412; A01D34/63; A01D34/67; A01D34/68; A01D34/6806; A01D2101/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
332 words
A lawn mower propelling drive, comprising a mower housing, a plurality of ground wheels rotatably mounted on said housing for mobilizing said housing, a cutter member rotatably mounted on said housing, a handle attached to said housing for steering said housing, a prime mover mounted on said housing for powering said cutter member and said ground wheels, said ground wheels including front wheels and rear wheels respectively connected with and located on said housing relative to the forward direction of mower movement, a shaft rotatably mounted on said housing and being drivingly connected to some of said wheels, a driven wheel operatively connected with said shaft and a drive disc operatively connected with said prime mover, said driven wheel and said drive disc being in rotatable contact for transmitting rotation therebetween and being perpendicular to each other and with said drive disc having its face in rolling contact with the circumference of said driven wheel, and said face of said drive disc being of a resilient material for frictional drive with said driven wheel and being disposed above said driven wheel, a disc-supporting member pivotally supported on said housing for movement in a plane parallel to the plane of said face of said drive disc and rotatably supporting said drive disc for movement of said drive disc across and also into and out of contact with the circumference of said driven wheel respectively for variable speed drive and for interruption of the drive to said some of said wheels, yieldable means connected to said supporting member for yieldingly urging said drive disc into rolling contact with said driven wheel and for permitting movement of said drive disc away from the position of rolling contact, a cam rotatably mounted on said disc-supporting member for moving the latter and said drive disc away from said driven wheel to disengage the drive between said drive disc and said driven wheel, and a control extending from said cam to said handle for access by the operator.
Claim 2
Dependent Claim
332 words
A lawn mower propelling drive, comprising a mower housing, a plurality of ground wheels rotatably mounted on said housing for mobilizing said housing, a cutter member rotatably mounted on said housing, a handle attached to said housing for steering said housing, a prime mover mounted on said housing for powering said cutter member and said ground wheels, said ground wheels including front wheels and rear wheels respectively connected with and located on said housing relative to the forward direction of mower movement, a shaft rotatably mounted on said housing and being drivingly connected to some of said wheels, a driven wheel operatively connected with said shaft and a drive disc operatively connected with said prime mover, said driven wheel and said drive disc being in rotatable contact for transmitting rotation therebetween and being perpendicular to each other and with said drive disc having its face in rolling contact with the circumference of said driven wheel, and said face of said drive disc being of a resilient material for frictional drive with said driven wheel and being disposed above said driven wheel, a disc-supporting member pivotally supported on said housing for movement in a plane parallel to the plane of said face of said drive disc and rotatably supporting said drive disc for movement of said drive disc across and also into and out of contact with the circumference of said driven wheel respectively for variable speed drive and for interruption of the drive to said some of said wheels, yieldable means connected to said supporting member for yieldingly urging said drive disc into rolling contact with said driven wheel and for permitting movement of said drive disc away from the position of rolling contact, a cam rotatably mounted on said disc-supporting member for moving the latter and said drive disc away from said driven wheel to disengage the drive between said drive disc and said driven wheel, and a control extending from said cam to said handle for access by the operator.
Claim 3
Dependent Claim
73 words
The lawn mower propelling drive as claimed in claim 1, wherein the drive connection from said prime mover to said drive disc is a belt, and including a pulley mounted on said housing for training said belt thereover, and said disc-supporting member being an arm pivotal on said housing at a location adjacent said pulley for arcuate swinging of said drive disc about a pivot center which retains the tension in said belt.
Claim 4
Dependent Claim
110 words
The lawn mower propelling drive as claimed in claim 1, wherein the drive connection from said prime mover to said drive disc is a belt drive, and including two pulleys mounted on said housing and being spaced apart on said housing for guiding said belt, a third pulley co-axial with said drive disc and drivingly connected thereto and having said belt trained thereon for rotating said drive disc, and said disc-supporting member being an arm pivotal on said housing at a location intermediate said pulleys for arcuate swinging of said drive disc about a pivot center which maintains tension in said belt in all swung positions of said drive disc.
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) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |