Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
132 words
In a hole saw assembly equipped with a quick disconnect rotatable drive arbor including a drive shaft having first and second threaded sections of opposite thread direction, the included angle between the helices of the threaded sections being a non-locking angle, a drive ring threadably mounted on one of said threaded sections, and a hole saw threadably mounted on the other of said threaded sections for rapid assembly and disassembly of the hole saw and the drive shaft; the improvement comprising a locking ring mounted on said shaft, said locking ring being rotatable to locking position where it prevents the axial movement of said drive ring upon reverse rotation of said arbor and to a non-locking position where it accommodates axial movement of said drive ring upon reverse rotation of said arbor.
Claim 2
Dependent Claim
132 words
In a hole saw assembly equipped with a quick disconnect rotatable drive arbor including a drive shaft having first and second threaded sections of opposite thread direction, the included angle between the helices of the threaded sections being a non-locking angle, a drive ring threadably mounted on one of said threaded sections, and a hole saw threadably mounted on the other of said threaded sections for rapid assembly and disassembly of the hole saw and the drive shaft; the improvement comprising a locking ring mounted on said shaft, said locking ring being rotatable to locking position where it prevents the axial movement of said drive ring upon reverse rotation of said arbor and to a non-locking position where it accommodates axial movement of said drive ring upon reverse rotation of said arbor.
Claim 3
Dependent Claim
33 words
The device of claim 1 wherein said drive arbor is provided with radial shoulder means and said locking ring is provided with shoulder means which engages said radial shoulder means in locking position.
Claim 4
Dependent Claim
19 words
The device of claim 2 wherein a biasing spring is positioned between said locking ring and said drive ring.
Claim 5
Dependent Claim
21 words
The device of claim 3 wherein said spring frictionally engages said locking ring and said drive ring to resist relative rotation.
Claim 6
Dependent Claim
22 words
The device of claim 2 wherein said drive arbor has a neck of reduced cross section to provide said radial shoulder means.
Claim 7
Dependent Claim
44 words
The device of claim 5 wherein said neck has a non-circular periphery having walls providing lobes and the locking ring has a non-circular aperture having walls engageable therewith to limit relative rotation therebetween and establish the locking and non-locking positions of said locking ring.
Claim 8
Dependent Claim
32 words
The device of claim 6 wherein said arbor adjacent said neck has a non-circular periphery which mates with said non-circular periphery of said locking ring to accommodate relative axial sliding movement therebetween.
Claim 9
Dependent Claim
46 words
The device of claim 7 wherein the walls of said neck establishing the non-locking position of said locking ring are axial extensions of walls of the adjacent non-circular periphery of the arbor to guide the locking ring in its axial sliding movement in its non-locking position.
Claim 10
Dependent Claim
53 words
The device of claim 6 wherein the non-circular aperture of said locking ring is formed in a recess defined by a circular wall dimensioned to engage the periphery of said arbor adjacent said neck to maintain the locking ring concentric with said arbor during the rotation thereof between its locking and non-locking positions.