Title:
POSITIVE AND NEGATIVE PRESSURE RELAXATION DEVICE
Document Type and Number:
Japanese Patent JP2021181715
Kind Code:
A
Abstract:
To reduce the size of a positive and negative pressure relaxation device 1 and to provide means of preventing a valve body 411 of the positive and negative pressure relaxation device 1 from tilting during operation.SOLUTION: There is provided a positive and negative pressure relaxation device 1 having a ventilation hole 32 and a valve body 411 and opening the ventilation hole 32 when the inside of equipment 100 becomes a positive pressure or a negative pressure. The positive and negative pressure relaxation device can be miniaturized by arranging an exhaust valve 4a that operates at the time of positive pressure and the valve body 411 of an intake valve 4b that operates at the time of negative pressure in the equipment 100. A guide 411b on the valve body 411 of the intake valve 4b and exhaust valve 4a is guided by a guide receiving part 332 on a mounting cylinder 3 so that the valve body 411 can contact a valve seat 34 without tilting.SELECTED DRAWING: Figure 1
Inventors:
NAGAHARA TORU
Application Number:
JP2020087717A
Publication Date:
November 25, 2021
Filing Date:
May 19, 2020
Export Citation:
Assignee:
MARUICHI CORP
International Classes:
E03B11/08