Todd Stahl

US Patent:

7342197, Mar 11, 2008

Filed:

Sep 30, 2005

Appl. No.:

11/240050

Inventors:

Gary J. Hanus - Edina MN, US
Rodney E. Reeve - Minneapolis MN, US
Todd J. Stahl - Golden Valley MN, US

Assignee:

Phoenix Solutions Co. - Crystal MN

International Classification:

B23K 10/00

US Classification:

2191215, 21912159, 21912152, 219 75

Abstract:

To protect the collimator of a transferred plasma arc torch from premature failure due to corrosion, an anti-corrosive covering is applied on the exposed face surface and a portion of the inner exit bore of the collimator. The specification describes several methods for producing the collimator for a plasma torch having an anti-corrosive coating or cladding on the exposed surfaces thereof, including electroplating, electroless plating, flame spraying, plasma spraying, plasma transferred arc, hot isostatic pressing and explosive cladding.

US Patent:

54517400, Sep 19, 1995

Filed:

Nov 7, 1994

Appl. No.:

8/335038

Inventors:

Gary J. Hanus - Edina MN
Todd J. Stahl - Golden Valley MN
Salvador L. Camacho - Raleigh NC

Assignee:

FluiDyne Engineering Corporation - Minneapolis MN

International Classification:

B23K 1000

US Classification:

21912159

Abstract:

A plasma arc torch is provided which is convertible in the field as to be able to operate in either a transfer arc mode or non-transfer arc mode. The plasma arc torch comprises a torch body having channels formed for flow of coolant and plasma gas therein. The torch body further comprises an anode and a cathode base and terminates at a threaded connection point. Adapted to be assembled to the threaded connection by means of mating threads is, alternatively, either an end cap or a cathode extension assembly, thereby establishing a plasma arc torch capable of operating in either a transfer arc mode or a non-transfer arc mode. When the end cap is connected, the cathode base is not energized. The cathode extension assembly contains a cathode extension which connects to the cathode base on assembly. Both the cathode base and cathode extension are energized to form the active cathode for the non-transfer arc mode operation.

US Patent:

53629396, Nov 8, 1994

Filed:

Dec 1, 1993

Appl. No.:

8/160471

Inventors:

Gary J. Hanus - Edina MN
Todd J. Stahl - Golden Valley MN
Salvador L. Camacho - Raleigh NC

Assignee:

FluiDyne Engineering Corporation - Minneapolis MN

International Classification:

B23K 900
B23K 1000

US Classification:

21912159

Abstract:

A plasma arc torch is provided which is convertible in the field as to be able to operate in either a transfer arc mode or non-transfer arc mode. The plasma arc torch comprises a torch body having channels formed for flow of coolant and plasma gas therein. The torch body further comprises an anode and a cathode base and terminates at a threaded connection point. Adapted to be assembled to the threaded connection by means of mating threads is, alternatively, either an end cap or a cathode extension assembly, thereby establishing a plasma arc torch capable of operating in either a transfer arc mode or a non-transfer arc mode. When the end cap is connected, the cathode base is not energized. The cathode extension assembly contains a cathode extension which connects to the cathode base on assembly. Both the cathode base and cathode extension are energized to form the active cathode for the non-transfer arc mode operation.