Torch with rotational start
First Claim
1. A consumable electrode adapted for locking engagement in a fixed axial and rotational position relative to a cathode, said electrode comprising:
- an electrode body at a forward end of said electrode, the electrode body having a central longitudinal axis;
a tail stock projecting axially rearwardly from said electrode body; and
a cam-like contact formation disposed on said tail stock, said cam-like contact formation engageable with a cathode contact formation such that rotation of said electrode and the cathode relative to one another causes said electrode to be in locking engagement with the cathode.
1 Assignment
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Accused Products
Abstract
A plasma arc torch has a threadless electrode-cathode locking assembly, a one-piece tip assembly, and a rotational contact starting mechanism. The cathode and electrode of the locking assembly are configured such that relative rotation of the electrode with respect to the cathode causes the electrode to move in an axial direction relative to the cathode for locking the electrode in fixed axial and rotational position with respect to the cathode. The inner wall of the one-piece tip assembly is configured to receive the forward end of the electrode in a non-contact position. Rotation of the electrode with respect to the tip causes an arcing formation on the electrode to contact an arcing chamber within the cavity. Rotation of the electrode away from the tip generatesa pilot arc in the arcing chamber.
40 Citations
21 Claims
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1. A consumable electrode adapted for locking engagement in a fixed axial and rotational position relative to a cathode, said electrode comprising:
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an electrode body at a forward end of said electrode, the electrode body having a central longitudinal axis;
a tail stock projecting axially rearwardly from said electrode body; and
a cam-like contact formation disposed on said tail stock, said cam-like contact formation engageable with a cathode contact formation such that rotation of said electrode and the cathode relative to one another causes said electrode to be in locking engagement with the cathode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A torch adapted for receiving a consumable electrode, said torch comprising:
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a torch body having a central longitudinal axis, a rearward end, and a forward end; and
a cathode mounted axially on the torch toward the forward end of the torch body, said cathode comprising a locking formation engageable by a locking formation of the electrode, and a cam-like contact formation engageable by a contact formation of the electrode;
said cathode cam-like contact formation being configured so that relative rotation between the electrode and cathode causes the electrode to move in an axial direction relative to the cathode thereby locking the electrode in fixed axial and rotational position relative to the cathode. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification