Cap with flexible retaining means

A cap arrangement for covering a necked opening, having an open and closed position, the arrangement comprising:

• (a) a cap having at least one internal spring which is retained within the cap by an internal annular recess or pocket indents corresponding in number to the spring ends, the at least one internal spring positioned to engage a rim of the necked opening with sufficient tension to retain the cap in its closed position but to permit easy withdrawal of the cap upon application of suitable pressure to the cap,
• (b) an extension member extending from the cap and integral therewith;
• and
• (c) a flexible retaining spring for securing the cap to the neck in proximity to the opening,
• the flexible retaining spring having first and second ends and being hinged at its first end to the distal end of the extension member providing a non-fixed pivot point positioned in a plane laterally spaced from the cap and neck whereby the cap pivots between its open and closed positions, and at its second end is coupled to the neck of the opening.

A cap arrangement for a fuel tank fill neck which terminates at its outer end with an adapter for coupling to a fuelling nozzle, the cap arrangement having an open and closed position, the arrangement comprising:

• (a) a cap having two internal springs which are retained within the cap by pocket indents corresponding in number to the number of spring ends, wherein the indents are positioned so that at least one internal spring positioned in the indents engages a rim of the adapter with sufficient tension to retain the cap in its closed position but to permit easy withdrawal of the cap upon application of suitable pressure to the cap,
• (b) an extension member extending from the cap and integral therewith;
• and
• (c) a flexible retaining spring for securing the cap to the neck in proximity to the opening, the flexible retaining spring having first and second ends and being hinged at its first end to the distal end of the extension member providing a non-fixed pivot point laterally spaced from the cap and neck whereby the cap pivots between its open and closed positions, the first end further comprising a detent which when the cap is open bears firmly on a flat surface of the extension member and forces the cap to remain open and clear of the necked opening and permits the cap to be moved to its closed position upon application of suitable pressure to the cap, the flexible retaining spring being secured to the adapter at its second end by a wireform, the cap arrangement further comprising an overload restraint which is secured to the adapter and is so shaped as to limit deformity of the flexible retaining spring during use.