[특허]Dual hydrostatic drive walk-behind mower

Dual hydrostatic drive walk-behind mower 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	A01D-034/68
출원번호	US-0674109 (1991-03-25)
발명자 / 주소	Wenzel Philip H. (Vernon Center NY)
출원인 / 주소	Ferris Industries, Inc. (Oneida NY 02)
인용정보	피인용 횟수 : 53 인용 특허 : 0

초록 ▼

An extra-wide self-propelled lawn mower employs twin hydrostatic transmissions to power left and right drive wheels situated behind a forward mowing deck. There are left and right primary speed control levers adjacent hand grips on the mower hand assembly. These have linkages that include a common pivot shaft and respective spring couplings to control the actuator arms of the hydrostatic transmissions. Secondary speed control levers, in the form of brake levers, are mounted adjacent the right and left hand grips and are non-resiliently coupled to the hydrostatic transmission actuators arms. The secondary levers are squeezed to override the primary speed control and slow the respective transmission for braking or to effect a turn, pivoting about the inside wheel. Squeezing the secondary control lever completely will cause the wheel on that side to reverse, effecting a pivoting at the center of the mower.

대표청구항 ▼

A self-propelled mower that comprises a front mowing deck housing a blade assembly containing one or more movable blades, a rear power deck containing an engine, left and right drive wheels, and a power train coupling the engine to the drive wheels, power take off means for connecting the blade assembly to the engine, handle bar means attached to the back of the power deck for steering the drive wheels, said handle bar means having left and right grip portions, said power train further including left and right hydrostatic transmission means, each having input shaft means connected to the engine, an output drive shaft connected to drive a respective one of the left and right drive wheels, and a speed regulator movable to set the speed ratio of the output drive shaft to the associated input shaft means within a continuous range from reverse, through neutral, wherein the associated output drive shaft is idle, to maximum forward; left and right primary speed control means positioned on the handle bar means adjacent said left and right grip portions and operatively connected to the respective left and right transmission speed regulators; left and right primary speed control linkages for yieldably urging the speed regulators of the respective hydrostatic transmission means to any desired position within said continuous range; a common movable member coupling both said primary speed control lever means to both said left and right primary speed control linkages so that the operator can select a desired drive wheel speed for the drive wheels with either hand without releasing the handle bar means or uncoupling the transmission means from the engine; left and right secondary speed control lever means mounted respectively on said handle bar means adjacent said left and right grip portions and which can be actuated without releasing the respective grip portion on the respective primary speed control lever means; and independent left and right secondary speed control linkages coupled respectively to said left and right secondary speed control lever means and also non-yieldably connected to the speed control regulators of the respective hydrostatic transmission means, such that actuating one of said left and right secondary speed control lever means urges the respective secondary linkage to move the respective transmission means speed regulator to a desired position, overriding the corresponding left or right primary speed control linkage but not affecting the speed regulator of the other transmission means as determined by said primary speed control lever means.

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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연합인증

Dual hydrostatic drive walk-behind mower 원문보기

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Dual hydrostatic drive walk-behind mower 원문보기

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이 특허를 인용한 특허 (53)

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