Driving bit linking device in a box wrench
OwnerDaniel Huanginventor
Life of this patent
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Abstract
A driving bit linking device in a box wrench includes a box wrench on a handle having a central bore, a pair of checking slots of different level in the opposing middle peripheries, an annular collar on a lower periphery and an annular groove in an upper periphery for disposing a retaining ring, a bottom spring disposed in the circular section of the central bore, a pair of compression springs wrapped on the outer periphery each including a transverse checking rod respectively inserted into the hexagonal section of the central bore through the checking slots and a cap wrapped on the box wrench and secured by the retaining ring. It is characterized that this device is capable of linking up a C type bit, a E type bit and even a double tips bit.
Claims6
A driving bit linking device in a box wrench comprising:
- a box wrench connected to a handle at lower end, a central bore which is defined a hexagonal upper section and a circular lower section, a pair of checking slots respectively formed in opposing middle peripheries at different level, an annular collar on a lower periphery and an annular groove in upper periphery abutting upper rim for disposing a retaining ring therein;
- a bottom spring disposed in the circular section of said box wrench having a large diameter loose lower portion and a less diameter intensive upper portion;
- a pair of compression springs sequentially wrapped on outer periphery of said box wrench stopped against said annular collar and each having a transverse checking rod on top respectively inserted into said hexagonal section through said checking slots;
- a cap wrapped on said box wrench having an annular shoulder on upper inner periphery retained by said retaining ring;
- a E type bit engaged into the hexagonal section of said box wrench having an annular groove in lower periphery engaged with said transverse checking rods;
- a C type bit engaged into the hexagonal section of said box wrench having a rhombic concave in each angle of hexagonal body respectively engageable with said transverse checking rods.
Dependencies are inferred from the claim text.