Bolt
OwnerMark Doye, Daniel Hardinghaminventors
Life of this patent
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Abstract
A bolt for securing timber to any other material, comprises: a bolt head with a series of spiked teeth on its underside; a cylindrical bolt rod extending from the bolt head is threaded and split into two rods at its free end, so as to define a slot therebetween. In use a user drills a hole through pieces of timber to be secured together, and hammers the bolt through the hole. The spiked teeth on the bolt head lock into the timber, securing the bolt at one end. At the free, split end of the bolt rod, a washer and nut are tightened onto the bolt. A cold chisel is hammered into the slot between the split ends of the rod, bending the ends outwards and thus preventing the nut from loosening.
Claims20
A bolt comprising:
- a square head, a surface area of which is at least 49×10−6 m2, the square head including a non-circular recess;
- and
- a shaft, bonded to the non-circular recess in the square head, for receiving a nut, at least a portion of which shaft is threaded;
- the head including a folded engagement means on an underside of the head of the bolt, the folded engagement means corresponding to a cut section of the head, and having a scoop-shaped tooth at least 2 mm in height so as to engage with a piece of timber and thereby provide optimum purchase with the piece of timber.
A bolt comprising:
- a square head, a surface area of which is at least 49×10−6 m2, the square head including a non-circular recess;
- and
- a shaft, bonded to the non-circular recess in the square head, for receiving a nut, at least a portion of which shaft is threaded;
- the head including a folded engagement means on an underside of the head of the bolt, the folded engagement means corresponding to a cut section of the head, and having a scoop-shaped claw at least 2 mm in height so as to engage with a piece of timber and thereby provide optimum purchase with the piece of timber.
Dependencies are inferred from the claim text.