초록 ▼

An improved filler cap for a tank having an opening defined by an annular wall of the type comprising (1) a plug member having an outwardly extending flange at its upper end and a lower end having a lower surface for contacting a sealing member disposed about the plug periphery, (2) a sealing member

An improved filler cap for a tank having an opening defined by an annular wall of the type comprising (1) a plug member having an outwardly extending flange at its upper end and a lower end having a lower surface for contacting a sealing member disposed about the plug periphery, (2) a sealing member, and (3) a retaining member positioned below the sealing member for compressing the sealing member against the lower end of the plug member. In the improved cap, the surface of the lower end of the plug member and the upper surface of the retaining member define between them a first grooved portion for clinching the sealing member in position adjacent the plug periphery and a second radially inwardly disposed grooved portion of reduced cross section for accommodating fuel induced swelling or pressure induced deformation of the sealing member. With this improved structure, the cap can relieve pressure without interference from the sealing member, as the clinch groove restrains the sealing member from outward deformation and the accommodation groove receives the deformation radially inward.

대표청구항 ▼

An improved filler cap for a tank having an opening defined by an annular wall of the type comprising (1) a plug member having an outwardly extending flange at its upper end and a lower end having a contact surface for contacting a sealing member disposed about the plug periphery, (2) a sealing memb

An improved filler cap for a tank having an opening defined by an annular wall of the type comprising (1) a plug member having an outwardly extending flange at its upper end and a lower end having a contact surface for contacting a sealing member disposed about the plug periphery, (2) a sealing member, and (3) a retaining member positioned below the sealing member for compressing the sealing member against the lower end of the plug member, said filler cap characterized in that: said contact surface of said plug member and said upper surface of said retaining member define between them a first grooved portion for clinching said sealing member in position adjacent the plug periphery and a second radially inwardly disposed grooved portion of reduced cross section for accommodating deformation of said sealing member, wherein said first grooved portion circumscribes a sufficient portion of the periphery of the sealing member to restrain radially outward deformation of said sealing member and thereby force such deformation into said second radially inwardly disposed grooved portion.