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US 2003/0165372 A1Published application
Security fixing for machine guard
OwnerSean Kenneth Mackayinventor
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OwnerSean Kenneth Mackayinventor
Estimating the term…
A releasable security fixing system comprising a bolt (3) having a head and a shank. A security nut (7) which is engageable threadingly with the shank of the bolt and a cupped collar (5) having a hole in the cupped end to fit over the shank of the bolt and having a length greater than the projecting end of the shank of the bolt when installed, and being open at the other end to receive the security nut. The security nut has a circular periphery and is provided with a plurality of grooves (77) cut into one end of the nut and extending away from said end. A complimentary key (10) is provided for fitting and releasing the nut. The shank of the bolt is such that, in use, the shank of the bolt projects beyond the security nut in its installed position, and the key having an aperture to receive the projecting end of the bolt shank.
A releasable security fixing system comprising a bolt (3) having a head and a shank (33), a security nut (7) which is engageable threadingly with the shank (33) of the bolt, a cupped collar (5) having a hole in the cupped end to fit over the shank of the bolt and having a length greater than the projecting end of the shank of the bolt when installed, and being open at the other end to receive the security nut provided with a plurality of grooves (77) cut into one end of the nut and extending away from said end, and further comprising a complimentary key (10) for fitting and releasing the nut, the security nut having a circular periphery and characterised in that the circular periphery of the security nut extends into close conformity with the bore of the collar and in that the shank of the bolt is such that, in use, a non threaded reduced diameter portion of the shank of the bolt projects beyond the security nut in its installed position towards the end of the collar, and the key having an aperture to receive the projecting end of the bolt shank.
A releasable security fixing system as claimed in any one of the preceding claims in which the security nut incorporates an anti-rotation means (75).
A releasable security fixing system as claimed in any one of the preceding claims in which the collar has a sleeve (9) fitted about its periphery.
A releasable security fixing system as claimed in any one of the preceding claims in which a low friction washer (11) is fitted under the security nut between it and the cupped end of the collar.
A releasable security fixing system as claimed in any one of the preceding claims in which, in use, the bolt is fixed non-rotatably to a secure anchoring point of the component to which the removable guard is releasably secured.
A releasable security fixing system as claimed in any one of the preceding claims in which a dust cover (13) is fitted into the open end of the collar.
A releasable security fixing system constructed and arranged, substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
Dependencies are inferred from the claim text.