Claims
- 1. A device for centering and maintaining short spool pieces in a conventional threading machine while cutting and threading the short spool piece, said device consisting of
- a hollow stabilizer and guide bar, which stabilizes the device when the device is clamped in a threading machine, having a length of 9 inches or greater, an outside diameter of from 13/8 to 65/8 inches and an inside diameter of from 1/8 to 1/4 inches smaller than the outside diameter,
- a workholder, which is circular in structure and which has an outside diameter greater than the outside diameter of the hollow stabilizer and guide bar and which has a standard threaded inside diameter of 1/8 to 1/4 inch greater than the inside diameter of the hollow stabilizer and guide bar in order to hold short pieces of threaded pipe securely,
- said workholder having a length which is dependent on the diameter of the short spool piece being processed, which in turn is dependent upon the length of exposed lining that is desired in the short spool piece,
- said workholder being axially aligned and permanently affixed to one end of the stabilizer and guide bar. said one end of said stabilizer and guide bar extending radially inwardly beyond the inside threaded diameter of said workholder to form a planar lip against which a leading edge of one end of said spool piece is seated and said length of exposed lining extends into said guide bar when said spool piece is positioned in the device for cutting and threading an opposite end thereof.
- 2. A device as claimed in claim 1 wherein the hollow stabilizer and guide bar has an outside diameter of 65/8 inches, an inside diameter of 6 inches and the workholder has an outside diameter of 7 inches, a standard threaded inside diameter of 61/8 inches.
- 3. A device as claimed in claim 1 wherein the hollow stabilizer and guide bar has an outside diameter of 13/8 inch, an inside diameter of 1 inch and the workholder has an outside diameter of 13/4 inches, a standard threaded inside diameter of 11/8 inches.
Parent Case Info
This is a division, of application Ser. No. 661,293, filed Feb. 25, 1976, U.S. Pat. No. 4,028,762.
US Referenced Citations (5)
Divisions (1)
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Number |
Date |
Country |
Parent |
661293 |
Feb 1976 |
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