F - Mech Eng,Light,Heat,Weapons – 16 – B
Patent
F - Mech Eng,Light,Heat,Weapons
16
B
85/101
F16B 23/00 (2006.01) B25B 15/00 (2006.01)
Patent
CA 1066542
LOBULAR SOCKET HEAD FASTENER WITH SERVICE SLOT Abstract of the Disclosure There is disclosed a socket head type fastener which employs in addition to a primary, lobular drive socket, an au- xilliary drive tool engaging means in the form of a service slot for the reception of a screwdriver or similar type driving tool. The service slot enables the fastener to be removed and rein- stalled by a serviceman in the field, when the specific drive tool sized to mate with the lobular socket is not available. The socket and service slot combination is of a special design in that said socket is of a multi-lobular configuration designed for engagement by a correspondingly shaped multi-lobular tool, where the respective lobes of each will be in engagement over known surface area portions upon driving of the fastener, as determined by industry standards. The service slot means is provided by a pair of slots which open into the socket through the arcuate wall surfaces of the opposed lobes. The slots are constructed such that the side walls thereof intersect the ar- cuate surface serving to define the flutes and lobes at locations disposed outwardly of the lobe surface portions which are engaged with the drive tool lobes. As such the presence of the service slot does not diminish the socket lobe surface area for resis- tive or driven engagement with the tool lobes.
295425
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