Document Type and Number:
Japanese Patent JPS5245147
Kind Code:
B1
Abstract:
In a system of the type of a central vacuum cleaner system having a plurality of connection boxes for selective connection of suction implements by insertion of a connector in one such box, a normally closed valve disposed within the box. This valve has a valve flap adapted to by swung into opening position within the box by engagement with the connector during insertion thereof. The valve flap has a concave outer surface and at least one shoulder contacting the forward end of the connector at a position spaced from the pivotal point of the flap.
Application Number:
JP1333072A
Publication Date:
November 14, 1977
Filing Date:
February 08, 1972
Export Citation:
International Classes:
F16K15/03; F16K1/20; F16L29/00; (IPC1-7): A47L5/38; A47L9/00