Chemical control of root growth in sewers and the like

Cleaning and liquid contact with solids – Processes – Hollow work – internal surface treatment

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

134 36, 134 2213, 134167C, 134168C, B08B 904

Patent

active

049815245

ABSTRACT:
Coating with clinging foam the upper interior walls of a generally horizontal pipe. A high-pressure pump, connected to a source of water, delivers jetting water to a nozzle through a normally reeled hose. The nozzle has a body divided by a pressure-actuated valve into two chambers, the first one having a series of high-pressure jet exits. The valve is normally open and, when the high pressure is off, leads into a second chamber having a foam outlet. Two pump and metering devices and a compressor then deliver water, chemical and air mixed into a damp sloppy foam to the hose and then, after working at foam to the desired expansion ratio, to the nozzle. A skid supports the nozzle and has a series of skid rods regularly spaced around it so that at any time two of the skid rods engage the bottom part of the wall of the pipe to be coated and hold the nozzle well above the liquid flow in the pipe's bottom. A gravity-operated device at the outlet is connected to the foam outlet from the nozzle's second chamber and causes expulsion of the foam toward the walls of said pipe lying along a predetermined upper sector only, while preventing expulsion toward the bottom portion.

REFERENCES:
patent: 3741807 (1973-06-01), Horne
patent: 3874926 (1975-04-01), Horne et al.
patent: 4011100 (1977-03-01), Ross
patent: 4025360 (1977-05-01), Horne et al.
patent: 4083384 (1978-04-01), Horne et al.
patent: 4206313 (1980-06-01), Cavoretto
patent: 4337096 (1982-06-01), Clifford
patent: 4556434 (1985-12-01), Woogerd

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Chemical control of root growth in sewers and the like does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Chemical control of root growth in sewers and the like, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chemical control of root growth in sewers and the like will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1994054

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.