Cutlery – Pipe and rod cutters – Rotary
Patent
1979-06-18
1981-10-13
Kunin, Stephen G.
Cutlery
Pipe and rod cutters
Rotary
30108, B23D 2106, B26B 2700
Patent
active
042940117
ABSTRACT:
A tube trimming device for cutting each of a plurality of closely spaced projecting tubes an equal distance from a reference or support wall. The device comprises inner and outer tubular housing members that are telescoped together for relative sliding movement through a limited range of travel. A spring extends the two members. A stationary bushing is connected to the projecting end of the inner member to set the desired location of a cutter wheel rotatably mounted on one end of an arm that is pivotally connected to the inner member on the inside. The other end of the pivoted arm has a cam follower that rides on a conical cam surface of the outer member. The tubular inner member is inserted over the projecting end of the tube to be cut, with the stationary bushing pressed against the reference wall. The outer housing is rotatably driven by a motor while, at the same time, the outer housing is pushed toward the reference wall. Relative movement of the outer housing with respect to the inner housing causes the cam follower on the end of the pivoted arm to ride up the inclined cam surface, which causes the cutter wheel at the other end to cut through the tubing. The bushing can be removed and replaced with a longer or shorter bushing to change the location of the cut to be made in the tube with respect to the support wall.
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patent: 646907 (1900-04-01), Henrikson
patent: 852302 (1907-04-01), Strong
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patent: 2262041 (1941-11-01), Pennella
patent: 2356402 (1944-08-01), Haynes
patent: 2743521 (1956-05-01), Oberhuber et al.
patent: 2764812 (1956-10-01), Thornson
Kunin Stephen G.
T/Drill, Inc.
Zatarga J. T.
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