Patent ID: 7174754

Claim:
A key for engaging a locking mechanism for a port cover for use in a system integrated into a structure for injection of a material into one or more cavities in the structure, the locking mechanism for removably securing a cover of the port cover to a base of the port cover that is coupled to the structure and comprises one or more ports for injecting material into the one or more cavities in the structure, the cover comprising a plurality of castellations in a circular arrangement with a slot separating each pair of adjacent castellations, the locking mechanism comprising a rotatable member and a plurality of legs each comprising a joint and a projection adapted to extend into a corresponding slot of the cover separating adjacent castellations, at least one particular leg lacking a projection and having its joint recessed from the joints of the other legs and configured to prevent insertion into the locking mechanism of a key that includes a corresponding projection, the key: configured to engage with the locking mechanism; configured to orient the locking mechanism such that the locking mechanism engages with a projection of the base to removably secure one or more tabs of the cover in engagement with one or more corresponding slots of the base to removably secure the cover to the base to prevent unauthorized access to the one or more ports; comprising: a hollow shaft; and a plurality of projections extending from the shaft in a circular arrangement for engaging the locking mechanism to rotate the rotatable member; one or more of the projections of the key configured to, when the key is properly oriented, compress inwardly corresponding legs of the locking mechanism to retract the projections of the corresponding legs from their corresponding slots of the cover to allow the rotatable member of the locking mechanism to be rotated using the key; and a gap, corresponding to the joint of the particular leg of the locking mechanism, that codes the key for use with the locking mechanism.