Patent ID: 7530467
Filing Date: 2009-05-12
Classification: F01M

Abstract:
1. A cap mounting arrangement in which a cap with a sealing member is detachably attached to a container to hermetically close an opening of the container, wherein the cap comprises an insert part having a cylindrical shape closed at one end and a flange provided at said closed one end of the insert part, the insert part has a radially expandable and contractible engaging part that extends radially outwardly from the distal end of the outer periphery of the insert part and a sealing groove that is formed in the outer periphery of the insert part between the engaging part and the flange to receive the sealing member, the opening of the container is provided with a cylindrical part into which the insert part of the cap is tightly inserted with the engaging part contracted radially inwardly, and the inner periphery of the cylindrical part has an engaging groove including: a deepest part that engages with the engaging part with the engaging part expanded radially outwardly when the cap is attached to the cylindrical part; and a guide extending to gradually decrease its radial depth from the deepest part in a circumferential direction so that when the cap is turned for removal, the engaging part engaged in the deepest part can be contracted radially inwardly to allow the cap to be removed.