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Title: Extendable pipe crawler

Abstract

A pipe crawler having a front leg assembly and a back leg assembly connected together by two air cylinders, each leg assembly having four extendable legs and a pair of actuators for sliding the extendable legs radially outward to increase the range of the legs when the pipe crawler enters a section of a pipe having a larger diameter. The crawler crawls by "inchworm"-like motion, the front leg assembly and back leg assembly alternately engaging and disengaging the wall of the pipe to hold the pipe crawler as the air cylinders alternately advance the front leg assembly and bring up the rear leg assembly. The pair of actuators of each leg assembly are parallel, adjacent and opposing acting so that each slides two adjacent extendable legs radially outward.

Inventors:
 [1]
  1. North Augusta, SC
Issue Date:
Research Org.:
E I DUPONT DE NEMOURS & CO INC
OSTI Identifier:
867832
Patent Number(s):
5018451
Assignee:
United States of America as represented by United States (Washington, DC)
DOE Contract Number:  
AC09-76SR00001
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
extendable; pipe; crawler; front; leg; assembly; connected; air; cylinders; legs; pair; actuators; sliding; radially; outward; increase; range; enters; section; larger; diameter; crawls; inchworm; -like; motion; alternately; engaging; disengaging; wall; hold; advance; bring; rear; parallel; adjacent; opposing; acting; slides; assembly connected; air cylinders; pipe crawler; rear leg; front leg; leg assembly; air cylinder; radially outward; larger diameter; extendable legs; /104/

Citation Formats

Hapstack, Mark. Extendable pipe crawler. United States: N. p., 1991. Web.
Hapstack, Mark. Extendable pipe crawler. United States.
Hapstack, Mark. Tue . "Extendable pipe crawler". United States. https://www.osti.gov/servlets/purl/867832.
@article{osti_867832,
title = {Extendable pipe crawler},
author = {Hapstack, Mark},
abstractNote = {A pipe crawler having a front leg assembly and a back leg assembly connected together by two air cylinders, each leg assembly having four extendable legs and a pair of actuators for sliding the extendable legs radially outward to increase the range of the legs when the pipe crawler enters a section of a pipe having a larger diameter. The crawler crawls by "inchworm"-like motion, the front leg assembly and back leg assembly alternately engaging and disengaging the wall of the pipe to hold the pipe crawler as the air cylinders alternately advance the front leg assembly and bring up the rear leg assembly. The pair of actuators of each leg assembly are parallel, adjacent and opposing acting so that each slides two adjacent extendable legs radially outward.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1991},
month = {1}
}

Patent:

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