| US 7,523,789 B2 | ||
| Tractor | ||
| Tatsuo Yamaguchi, Osaka (Japan); Noboru Yamamoto, Osaka (Japan); Toshiyuki Shin, Osaka (Japan); Shigenori Sakikawa, Amagasaki (Japan); and Shingo Araki, Amagasaki (Japan) | ||
| Assigned to Yanmar Co., Ltd., Osaka (Japan) | ||
| Appl. No. 10/594,346 PCT Filed Mar. 25, 2005, PCT No. PCT/JP2005/005539 § 371(c)(1), (2), (4) Date Sep. 26, 2006, PCT Pub. No. WO2005/092075, PCT Pub. Date Oct. 06, 2005. |
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| Claims priority of application No. 2004-093311 (JP), filed on Mar. 26, 2004; and application No. 2004-252342 (JP), filed on Aug. 31, 2004. | ||
| Prior Publication US 2007/0207021 A1, Sep. 06, 2007 | ||
| Int. Cl. A01B 59/043 (2006.01) | ||
| U.S. Cl. 172—439 [251/319; 414/703] | 3 Claims |
| 1. A tractor, comprising:
a transmission casing;
a lift arm support body;
a hydraulic circuit body which is detachably mounted on the lift arm support body;
a hydraulic control valve;
a lift arm being mounted on an upper portion of the transmission casing by way of said lift arm support body, the lift arm
being hydraulically controllable by said hydraulic control valve by way of said hydraulic circuit body; and
a valve cover body being mounted on the hydraulic circuit body, the hydraulic control valve being housed in an inside of the
valve cover body, the hydraulic control valve including a drain which is dischargeable through a drain circuit formed in an
inside of the hydraulic circuit body by way of a drain receiving space which is formed in the inside of the valve cover body.
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