Title:
RELAY VALVE DRAIN STRUCTURE OF TRAILER
Document Type and Number:
Japanese Patent JP2017149264
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To easily drain moisture retained in an operation chamber of a relay valve to the outside.SOLUTION: A drain pipe 87 branches from a branch pipe 80 of a control line 21. A valve body 92 is provided to the drain pipe 87 so as to be displaceable between an open position where an internal pipe line 90 of the drain pipe 87 and the outside are communicated via a drain channel 106 and a closed position where the internal pipe line 90 of the drain pipe 87 and the outside are cut off by closing the drain channel 106. A valve body return spring 93 and an attached pipe 100 switch the valve body 92 between the closed position and the open position and hold it at each position. An effective flow channel cross section A of the drain channel 106 is set to be narrower than an effective flow channel cross section B of the control line 21 from the branch pipe 80 to an instruction input port 60 so that, when compressed air of a predetermined pressure or more is supplied to the control line 21 in a state in which the valve body 92 is held at the open position, a relay piston moves from a non-braking position toward a braking position against an energization force of a piston return spring.SELECTED DRAWING: Figure 5
More Like This:
| WO/2024/077699 | PARKING RELAY VALVE AND PARKING BRAKING SYSTEM |
| WO/2011/050243 | BRAKE PIPE CHARGE MONITOR SYSTEM AND METHOD |
Inventors:
NISHIYAMA FUMITO
SUZUKI TAKEKI
SUZUKI TAKEKI
Application Number:
JP2016033382A
Publication Date:
August 31, 2017
Filing Date:
February 24, 2016
Export Citation:
Assignee:
FRUEHAUF JAPAN
International Classes:
B60T15/18; F16K31/50; F16K31/60
Domestic Patent References:
| JP2010221179A | 2010-10-07 | |||
| JPS6116166A | 1986-01-24 | |||
| JP2015009639A | 2015-01-19 | |||
| JPS53148666A | 1978-12-25 |
Foreign References:
| US4575157A | 1986-03-11 |
Attorney, Agent or Firm:
Naoshi Yoneyama