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Title: Lightweight extendable and retractable pole

Abstract

A lightweight extendable and retractable telescopic pole is disclosed comprising a plurality of non-metallic telescoping cylinders with sliding and sealing surfaces between the cylinders, a first plug member on the upper end of the smallest cylinder, and a second plug member on the lower end of the largest cylinder, whereby fluid pressure admitted to the largest cylinder will cause the telescoping cylinders to slide relative to one another causing the pole to extend. An elastomeric member connects the first plug member with one of the intermediate cylinders to urge the cylinders back into a collapsed position when the fluid pressure in the cylinders is vented. Annular elastomer members are provided which seal one cylinder to another when the pole is fully extended and further serve to provide a cushion to prevent damage to the cylinders when the pole is urged back into its retractable position by the elastomeric members and the venting of the pressure. A value mechanism associated with the pole is provided to admit a fluid under pressure to the interior of the telescoping cylinders of the pole while pressurizing a pressure relief port having an opening larger than the inlet port in a closed position whereby removalmore » of the pressure on the relief port will cause the relief port to open to quickly lower the pressure in the interior of the telescoping cylinders to thereby assist in the rapid retraction of the extended pole.« less

Inventors:
 [1];  [1]
  1. (Santa Barbara, CA)
Issue Date:
Research Org.:
EG & G Energy Measurements Inc
OSTI Identifier:
869416
Patent Number(s):
5333422
Assignee:
United States of America as represented by United States (Washington, DC) NVO
DOE Contract Number:  
AC08-88NV10617
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
lightweight; extendable; retractable; pole; telescopic; disclosed; comprising; plurality; non-metallic; telescoping; cylinders; sliding; sealing; surfaces; plug; upper; cylinder; largest; whereby; fluid; pressure; admitted; slide; relative; causing; extend; elastomeric; connects; intermediate; urge; collapsed; position; vented; annular; elastomer; provided; seal; extended; serve; provide; cushion; prevent; damage; urged; venting; value; mechanism; associated; admit; interior; pressurizing; relief; larger; inlet; closed; removal; quickly; assist; rapid; retraction; prevent damage; disclosed comprising; closed position; fluid pressure; pressure relief; sealing surface; sealing surfaces; lightweight extendable; /52/

Citation Formats

Warren, John L., and Brandt, James E. Lightweight extendable and retractable pole. United States: N. p., 1994. Web.
Warren, John L., & Brandt, James E. Lightweight extendable and retractable pole. United States.
Warren, John L., and Brandt, James E. Sat . "Lightweight extendable and retractable pole". United States. https://www.osti.gov/servlets/purl/869416.
@article{osti_869416,
title = {Lightweight extendable and retractable pole},
author = {Warren, John L. and Brandt, James E.},
abstractNote = {A lightweight extendable and retractable telescopic pole is disclosed comprising a plurality of non-metallic telescoping cylinders with sliding and sealing surfaces between the cylinders, a first plug member on the upper end of the smallest cylinder, and a second plug member on the lower end of the largest cylinder, whereby fluid pressure admitted to the largest cylinder will cause the telescoping cylinders to slide relative to one another causing the pole to extend. An elastomeric member connects the first plug member with one of the intermediate cylinders to urge the cylinders back into a collapsed position when the fluid pressure in the cylinders is vented. Annular elastomer members are provided which seal one cylinder to another when the pole is fully extended and further serve to provide a cushion to prevent damage to the cylinders when the pole is urged back into its retractable position by the elastomeric members and the venting of the pressure. A value mechanism associated with the pole is provided to admit a fluid under pressure to the interior of the telescoping cylinders of the pole while pressurizing a pressure relief port having an opening larger than the inlet port in a closed position whereby removal of the pressure on the relief port will cause the relief port to open to quickly lower the pressure in the interior of the telescoping cylinders to thereby assist in the rapid retraction of the extended pole.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {1}
}

Patent:

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