Patent ID: 7690323
Filing Date: 2010-04-06
Classification: G01D,Y10S,Y10T

Abstract:
1. A gauge head assembly comprising: a generally cylindrical body formed from a ferrous metal material having first and second ends with a first, axially extending annular recess formed in the first end thereof; the body including a generally cylindrical sidewall having a threaded outer surface, the sidewall defining an axially extending passage opening into the first recess and extending through the body and the second end, the second end including a second, axially extending annular recess formed around the perimeter of the passage, the second annular recess defining a shoulder extending around the circumference of the passage at the second end of the body; a tubular insert, the tubular insert having a cylindrical sidewall, a first closed end and a second open end, the tubular insert further comprising a collar extending radially outward at the second open end, wherein the tubular insert is disposed in the passage with the collar positioned in the second annular recess and the first closed end extending into the first annular recess, and wherein the tubular insert is permanently secured to the body with a gas-tight seal; and wherein the tubular insert is formed from a substantially non-magnetic material.