Threaded bolt and mounting therefor

Claim 1

An installation comprising, in combination, an apertured, relatively rigid support member and a two-part fastener assembly mounted on said member, said fastener assembly including a bolt having a head disposed at one side of said support member and a threaded shank joined to the head and projecting through the aperture in the support member and beyond the opposite side of said member, said shank carrying integral, resilient, support member engaging, projecting means, said projecting means being joined to the said shank in the vicinity of said head, but being spaced from the head and engaging said opposite side of said support member, and a bolt locking retainer captive on said bolt shank between said head and said projecting means, but normally subject to limited axial play relative to said shank between said head and said projecting means, said retainer having an apertured base through which said shank extends and said base, in said installation, being tensioned against said one side of said support member by the cooperative action of said bolt and head bearing on said base and said projecting means resiliently engaging said opposite side of said support member and drawing said head toward said one side of said member, and cooperating locking means on said bolt head and said retainer restraining said bolt against unintentional rotation relative to said support member, but permitting intentional incremental rotation of said bolt relative to said support member, said locking means including at least two, resilient upstanding side walls joined to the base of said retainer, saiD walls being spaced apart and being disposed in substantially parallel planes and being provided with a slot adjacent said base to provide improved resiliency and deflectability in said walls, said bolt head being snugly fitted between said walls and said walls being outwardly deflectable away from each other responsive to deliberate rotation of said bolt head, whereby, under normal usage conditions, the position of said support member relative to another member carrying a nut engaging said bolt shank may be adjusted responsive to deliberate incremental rotation of said bolt head with respect to said retainer, but said bolt shank is effectively restrained from unintentional rotation responsive to vibratory forces acting on said installation.