Title: Steering means particularly for internal pipe bending mandrels

Abstract: Steering means, particularly for use with internal pipe bending mandrels, wherein upper and lower driven wheels are mutually expanded against the pipe wall by an intermediate free-floating hydraulic cylinder, and wherein at least one of the upper and lower driven wheels are rotatably disposed to provide steering. The steering assembly is affixed as a support at one end of the mandrel and serves to keep the mandrel upright within the pipe.

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Inventors: Auxer, Marvin L. (Turtlegate, TX, US)

Application Number: 592230
Filing Date: 1975-07-01
Publication_date: 1976-09-14
Assignee: Mid-Continent Pipeline Equipment Company (Houston, TX)
Primary Class(es): 72/466 104/138.2
Other Classes:
US Patent Ref:

2638069	May, 1953	Mearns	269/48.
3058137	Oct, 1962	Doyle et al.	254/134.
3109477	Nov, 1963	Avera et al.	269/48.
3547040	Dec, 1970	Baran	104/138.
3718978	Mar, 1973	Van Koevering et al.	104/138.
3734428	May, 1973	Moritsovich et al.	104/138.
3741457	Jun, 1973	Gwin et al.	269/48.
3890905	Jun, 1975	Clavin	254/134.

Other Refs:
Primary Examiner: Larson, Lowell A.
Assistant Examiner:
Attorney: Fox, Jr.; Carl B.