| 摘要 |
PURPOSE:To simplify the constitution of a 5-position 4-direction valve for air suspension of semi-trailer truck and miniaturize the same by a method wherein the 5-position 4-direction valve is constituted without combining ON valve and OFF valve. CONSTITUTION:In the first changeover valve, the energizing force of a spring 3b is made stronger than the same force of the spring 4b while a cam body 8 and a piston 6 are connected in the energizing direction of the spring 4b in the second valve 4 and these are constituted so as to be connected with clearances (b), (c), to permit to be operated as a 3-position 3-direction valve. The second changeover valve 7 is integrated with the first changeover valve, a chamber 1f is communicated with the connecting hole 1b in the second changeover valve and the first and second changeover valves are permitted to be operated by a common lever 9 whereby these valves may be operated as the 5-position 4-direction valve as a whole. |
