Working vehicle equipped with engine automatic stop device

• US 4,509,614 A
• Filed: 05/06/1983
• Issued: 04/09/1985
• Est. Priority Date: 12/13/1982
• Status: Expired due to Fees

• Current Assignee: Kubota Corporation
• Original Assignee: Kubota Corporation
• Inventors: Kurohara, Kazuaki, Ogasawara, Hiroyuki, Bando, Niro, Ikeda, Fumihiro, Fujima, Yasuo, Usiro, Kenzo
• Primary Examiner(s): Peters, Jr., Joseph F.
• Assistant Examiner(s): Weaver, Ross
• Application Number:
  US06/492,249
• Time in Patent Office: 704 Days
• Field of Search: 180/272, 180/273, 74/483 R, 74/856
• US Class Current: 180/273
• CPC Class Codes: B60K 28/04 responsive to presence or absence of the driver, e.g. to weight or lack thereof
• CPC Class Codes: Y10T 74/20238 Interlocked

Abstract

A working vehicle equipped with engine automatic stop device, having a vertically movable seat and an engine adapted to be stopped when the operator leaves the seat. There is disposed a restraining mechanism for preventing the engine from being stopped even though the operator leaves the seat when a clutch at a power take-out shaft is disengaged.

Claims

1. A working vehicle equipped with an automatic engine stopping device, comprising:

an engine stopper mechanism including (a) a sitting sensor having a sensor arm and a spring and adapted to push up a seat when a load applied to the seat is below a predetermined amount, (b) engine stopper means to stop an engine in response to an upward pushing action of said sitting sensor, (c) a wire having one end thereof connected to said sensor arm, and (d) a rod having one end thereof connected to said engine stopper means, said rod and said wire being interconnected at the other end of each through link means attached thereto, respectively,

clutch operating means for engaging and disengaging a clutch disposed in a transmission system for a power takeoff shaft, and

restraining means including a restraining member provided on said link means and said clutch operating means, said restraining means for preventing said link means from moving in a first direction to permit said seat to be upwardly pushed while yet permitting said link means to move in a second direction, opposite to said first direction, when said clutch operating means is in a clutch-disengaging position.

2. A working vehicle as in claim 1 wherein said link means attached to said wire includes a pin, and wherein said restraining member defines a slot for receiving said pin.

3. A working vehicle as set forth in claim 2, wherein the rod includes a slot into which the pin is fitted, and wherein said vehicle further comprises an independent engine stop rod connected to said rod.

4. In a vehicle having an engine to propel the vehicle over a surface, a device to automatically stop the engine comprising:

a seat mounted for pivotal movement between a normal position and a displaced position;

sensor means operatively engaged with said seat to pivotally move said seat from said normal to said displaced position in response to a load being removed from said seat;

engine stopping means for stopping said engine;

clutch operating means manually moveable between clutch-engaged and clutch-disengaged positions for respectively engaging and disengaging a clutch of the vehicle;

linkage means for operatively interconnecting said sensor means and said engine stopping means, said linkage means operating said engine stopping means in response to said sensor means moving said seat from said normal position to said displaced position to thereby stop the engine when said clutch operating means is in said clutch-engaged position; and

restraining means operatively connected to said clutch operating means and said linkage means for preventing said sensor means from pivotally moving said seat from said normal to said displaced position when said clutch operating means is in said disengaged position to thereby prevent said engine from being stopped by said engine stopping means in response to said load being removed from said seat.

5. A device to automatically stop an engine of a vehicle during movement of the vehicle comprising:

clutch operating means manually moveable between a clutch-engaged position and a clutch-disengaged position for respectively engaging and disengaging a clutch mechanism;

a seat including means to mount said seat to the vehicle for pivotal movement between normal and displaced positions;

engine stopping means operatively engaged with said seat for moving said seat from said normal position into said displaced position in response to a load being removed from said seat when said clutch operating means is in said clutch-engaged position to thereby automatically stop said engine when said load is removed from said seat; and

means operatively connected to said clutch operating means and said engine stopping means for preventing said seat from pivoting into said displaced position when said clutch operating means is in said clutch-disengaged position to thereby prevent said engine from stopping when said load is removed from said seat.