Fasteners with multi-tiered recesses and drivers with multi-tiered driving tips

A fastener includes a threaded shank connected to a head. A composite recess is in the head, and the composite recess is open at the end of the head that is distant from the shank. The composite recess includes superimposed first and second recesses that are each configured for being drivingly engag...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	HENLY, JOHN W, HART, RENEE JOHNSON, GEMES, GARY A
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	BLASTING DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS ORMACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS,CLIPS, WEDGES, JOINTS OR JOINTING ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HAND TOOLS HEATING LIGHTING MANIPULATORS MECHANICAL ENGINEERING PERFORMING OPERATIONS PORTABLE POWER-DRIVEN TOOLS THERMAL INSULATION IN GENERAL TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FORFASTENING, CONNECTING, DISENGAGING OR HOLDING TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	A fastener includes a threaded shank connected to a head. A composite recess is in the head, and the composite recess is open at the end of the head that is distant from the shank. The composite recess includes superimposed first and second recesses that are each configured for being drivingly engaged by a tip of a driver. The length of the second recess can be greater than the length of the first recess. The tip of the driver includes superimposed tiers that are for simultaneously drivingly engaging within the composite recess of the fastener. The superimposed tiers includes first and second tiers, and the length of the second tier can be greater than the length of the first tier.