Lightweight extendable and retractable pole
- Santa Barbara, CA
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.
- Research Organization:
- EG & G Energy Measurements Inc
- DOE Contract Number:
- AC08-88NV10617
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Number(s):
- US 5333422
- OSTI ID:
- 869416
- Country of Publication:
- United States
- Language:
- English
Similar Records
Single action pneumatic powered spring retractable pump
Single action pneumatic powered spring retractable pump
Related Subjects
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/