Abstract An electrician''s tool for reaming the cut edges of tubular electrical conduit, including a handle, a set of radially arranged blades fixed with respect to said handle, a second set of radially arranged blades mounted for coaxial displacement relative to said first set of blades against the action of a coaxially arranged spring. Said first and second sets of blades having cutting edges arranged to intersect at points along said edges to form notches positioned on a circular locus of points, whereby the inner and outer concentric edges of a transversely cut surface of a conduit may be simultaneously reamed. The second set of blades also mounts a screw driver blade which moves axially therewith, and which resiliently recedes into a circular housing during use to permit said housing to surround the head of a screw and align the screwdriver blade with respect to said screw head, and prevent subsequent disengagement.
A multi-purpose electrician''s tool comprising: a handle element, and first and second blade elements; said first blade element including a first plurality of planar blades radially arranged with respect to the principal axis of said handle element, said second blade element including a second plurality of planar blades radially arranged in concentric relation with respect to said first blade element for relative movement along a coaxially disposed path between first and second fixed limits; said first plurality of blades having cutting edges disposed at a first given angle with respect to said principal axis, said second plurality of blades having edges disposed at a second angle with respect to said principal axis, so that when said second blade element is positioned between said limits, the cutting edges of said first and second blade elements will overlap along a circular locus of points concentric with said principal axis; and resilient means urging said second plurality of blades toward one of said limits.
Claim 2
Dependent Claim
161 words
A multi-purpose electrician''s tool comprising: a handle element, and first and second blade elements; said first blade element including a first plurality of planar blades radially arranged with respect to the principal axis of said handle element, said second blade element including a second plurality of planar blades radially arranged in concentric relation with respect to said first blade element for relative movement along a coaxially disposed path between first and second fixed limits; said first plurality of blades having cutting edges disposed at a first given angle with respect to said principal axis, said second plurality of blades having edges disposed at a second angle with respect to said principal axis, so that when said second blade element is positioned between said limits, the cutting edges of said first and second blade elements will overlap along a circular locus of points concentric with said principal axis; and resilient means urging said second plurality of blades toward one of said limits.
Claim 3
Dependent Claim
35 words
Structure in accordance with claim 1, further characterized in that second blade element includes a tubular housing slidably mounting said second plurality of blades, said resilient means including a coil spring disposed within said housing.
Claim 4
Dependent Claim
41 words
Structure in accordance with claim 2, further characterized in said second blade element including an axially positioned screwdriver blade thereon, said tubular housing surrounding the free end of said blade when said second blade element is disposed between said fixed limits.