The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 24, 2009
Filed:
Jun. 08, 2005
Kym John Keightley, Fairview Park, SA, AU;
Kym John Keightley, Fairview Park, SA, AU;
Other;
Abstract
The present invention relates to a hole-saw assembly () including a hole saw () having at one end a plurality of cutting teeth and at the other end two shafts. The assembly includes a mandrel () coaxially aligned with said hole-saw and including a body having two bores there through coaxially aligned with said shafts. An annulus () located on top of the body is coaxially aligned with said mandrel and hole saw and includes two holes, the annulus rotatable around its longitudinal axis from a first to a second position. In the first position the annulus holes are aligned with the bores and shafts allowing the shafts to be freely insertable and removable and in the second position the holes are misaligned to lock the shafts to the annulus. The mandrel further includes a pair of driving pins () adapted to engage driving apertures () found in hole saws especially larger ones. Typically the driving pins may biased to enable the assembly to be used even with those hole saws that do not include driving apertures and that also enables easier assembly of the device. A compressible O-ring () may further facilitate the operation of the assembly. This device avoids the problem of thread stripping.