초록 ▼

Cutting height adjustment device for lawn mower blades: adjustment is obtained by adjusting the height of the mower wheel axle with respect to the mower chassis; the wheel axle is carried on a crank arm which pivots about a shaft fixedly positioned with respect to the chassis; the shaft is pivotable

Cutting height adjustment device for lawn mower blades: adjustment is obtained by adjusting the height of the mower wheel axle with respect to the mower chassis; the wheel axle is carried on a crank arm which pivots about a shaft fixedly positioned with respect to the chassis; the shaft is pivotable to a plurality of angular positions; a detent disc is secured to the shaft; a latch, non-shiftable with respect to the chassis, is operable to selectively engage in and disengage from the detents, thereby to position the blades at various heights; a pointer associated with and movable with the shaft indicates blade height on a scale on the chassis.

대표청구항 ▼

Cutting height adjustment means for lawn mowers, wherein the mower comprises; a chassis, wheels which ride on a running surface; said wheels having an axle about which they rotate, and wherein said adjustment means is for adjusting the height of said wheel axle over the running surface with respect

Cutting height adjustment means for lawn mowers, wherein the mower comprises; a chassis, wheels which ride on a running surface; said wheels having an axle about which they rotate, and wherein said adjustment means is for adjusting the height of said wheel axle over the running surface with respect to the height of said chassis; said adjustment means comprising: a shaft pivotally connected to said chassis at a fixed location; a crank arm, said crank arm being connected to and supported on said shaft; said crank arm being rotatable with respect to said chassis around said shaft, without shifting of the position of said shaft with respect to said chassis; said axle being carried in said crank arm remote from said connection of said crank arm on said shaft; detent means secured to said shaft and rotatable therewith; said detent means comprising a plurality of separated detents, each of which, in turn, is movable into a position to be engaged by a latch as said shaft rotates; a latch that is so secured on said chassis so as to prevent changing the location of said latch on said chassis; said latch comprising an extension engageable in each said detent as it is rotated by said shaft into position to be engaged by said extension, and an operating member secured to said extension and normally fixed, but movable to move said latch extension into and out of engagement with said detents; said operating member being operable to shift said extension out of each said detent, thereby to permit rotation of said shaft, and also being operable to shift said extension into each said detent, thereby to prohibit further rotation of said shaft, said operating member having a bent-over portion, and a return spring disposed between said chassis and said operating member for normally biasing said extension into each detent as each said detent is presented to said extension.