An Improved Method of and Apparatus for Clearing, Cleaning, Lining and Painting Drain and other Pipes.
Year: 1898

page_text: Date of Application, 30th Mar., 1898
Complete Specification Left, 30th Dec., 1833-1ccepted, 11th Feb., 1899
PROVISIONAL SPECIFICATION.
An Improved Method of and Apparatus for Clearing, Cleaning, Lining
and Painting Drain and other Pipes.
GEORGE FREDERICK RESTALL, 3, Taunton Place, Regent's Park, London,
Sanitary Engineer, do hereby declare the nature of this invention to be as
follows:-
!
;
This my invention has reference to an improved method of, and apparatus for
clearing, cleaning, lining or painting the inner surface of drain and other pipes.
The object of my invention is to provide a simple means for clearing, cleaning,
lining or painting the inner surface of drain and other pipes when fixed, or with-
out taking them up from the ground for the purpose. By this invention I
first employ two conical shaped metal discs, which have sharp cutting edges at the
largest end, and are of less in diameter than the pipe to be cleared, a hole is
pierced through each disc lengthways. The discs are mounted on a metal rod,
which has a thread cut at each end, and a suitable loop-nut is screwed on each
end of the rod to trap the discs in position. When about to clear a drain or pipe
this apparatus is inserted in the pipe at one end where there is an opening;
or where one has been made for the purpose, and pulled from end to end by,
cords or other suitable means. I then employ another apparatus for cleaning,
which consists of two or more short lengths of metal tube linked or jointed
together, and at either end of the jointed tubular rod a thread is cut to receive
a suitable loop-nut and plug, a circular brush disc is mounted on the rod midway
its length, and either side thereof are suitable spiral springs, and beyond the
springs at each end of the rod is a rubber or flexible disc one of which fit the
pipe tightly, the other being the size of the pipe, the whole being kept in position
on the rod by loop nuts screwed on either end. When about to clean the
inner surface of a drain, this apparatus is placed in one end, and is filled between
the discs through the hollow tube with a suitable cleansing liquid, and is drawn
from end to end by cords or other suitable means. When painting or lining
the inner surface of drain or other pipes I employ a jointed tubular rod as
previously mentioned, and midway its length I mount a suitable brush fitting the
pipe, and either side of the brush is a spiral spring, and beyond the springs at
each end of the rod are suitable brushes which also fit the pipe, and have resilient
or rubber discs secured to their outer faces, one disc being larger in diameter
than the pipe and the other fitting the pipe or pipes through it has to pass, the
discs and springs are secured on the rod by suitable loop nuts screwed on either
end. When about to paint or line the inner surface of drain or other pipes the
apparatus is inserted in one end of the drain, and charged through the hollow
tube on which the discs are mounted with a suitable paint or coating liquid, and
the charging opening being suitably covered the apparatus is drawn from end
to end of the drain or pipe by cords or other suitable means. When the cords
are pulled to draw the apparatus through the drain or tube the discs contract

page_text: towards each other, and force the painting or coating liquid over the pipe the brushes
smoothing it off. To prevent the escape of the liquid or paint that may be in
the apparatus, when it is removed from the pipe I employ a short length of thin
metal tube one end of which is covered, a small hole being in the covered end, a
short cord is attached to the apparatus and passed through the hole in the
covered end, and the thin metal tube is then inserted in the pipe and the ap-
paratus with its contents is drawn into it and removed. With the clearing,
cleaning, lining and painting apparatus I use in some cases a pliable solid rod,
and the cleaning, lining, and painting apparatus may be charged through a
suitable opening made through the end discs, the opening being suitably covered.
Dated this 30th day of March 1898.
An Improved Method of and Apparatus for Clearing, Cleaning, Lining
[and Paint ng Drain and other Pipes.
I, GEORGE FREDERICK RESTALL, formerly of 3, Taunton Place, but now of 57,
Park Road, Regent's Park, London in, the County of Middlesex, Sanitary
Engineer, do hereby declare the nature of this invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by
the following statement:-
This invention has reference to an improved method of and apparatus for
clearing, cleaning, lining or painting the interior surfaces of drain or other
pipes without removing or taking them from the ground or other position they
occupy when in use.
In order to effect this I employ scraping, lining, or painting devices which
are introduced to the drain or other pipe either through a man hole or through
an opening obtained by removing a length or other portion of the pipe. The
device or apparatus being thus introduced into the pipe is drawn or pushed back-
wards and forwards by means of cords, chains, or rods. As the device inserted
is almost the same diameter and shape as the interior of the pipe this effectively
cleans its inner surface and permits of the debris being drawn back to the opening
through which the apparatus is inserted. In addition, by employing a special
device, paint, cement, or other lining can be introduced and distributed evenly
over the interior surface of the pipe
In order that my invention may be fully understood and ascertained I append
drawings in which:-
Fig. 1 is an elevation (part section) of a scraping device according to my
invention.
Fig. 2 is a sectional detail of same.
Fig. 3 is an elevation (part section) of a modification.
Fig. 4 is an elevation of a device used for painting or lining pipes or for intro-
ducing disinfectants thereto.
Figs. 5 and 6 are modifications of same.
Referring to Figs. 1 and 2. A and A¹ indicate two hollow cones their apices «
and a being presented to each other at a short distance apart and connected by
a chain B in such manner that when one of the cones is drawn base forward
the other must follow with its apex forward. Inside each of the hollow cones
is fitted a loop or swivel b these being preferably connected to the ends of the
chain B. To each of these loops 6 a cord C is attached by means of which the

page_text: device can be drawn in either direction; or a chain or rod may be used in which
latter case the apparatus may be thrust instead of being pulled through the
drain or other pipe. In place of the chain B a cord or rod may be employed to
connect the two zones together. The scraping edges of the bases of the cones
are so shaped as to prevent any dirt or other debris scraped off from passing
between the scraping edge and the interior surface of the pipe into the space
between the two cones. The shape as shewn in Fig. 2 ensures that the debris
shall be collected in the hollow of that cone which is moving in front.
In Fig. 3 the cones are shewn as having guide trollers D attached to the cone.
Three or more of these may be employed to each cone serving as guides to ensure
the correct position of the cones.
In Fig. 4 is shewn an apparatus which is used for painting or lining the in-
terior of drain or other pipes. Two india-rubber or other flexible discs or brushes E
are attached to iron or other tubes G, and the ends of these tubes are connected
by a chain, cord or flexible tube H; this is for the purpose of enabling the device
to pass round corners. The tubes G pass through their respective discs or
brushes E, and have caps or covers g attached to them by means of which the
ends of the tubes are closed. To each of these caps or covers are attached loops
or swivels band to these latter the ropes which serve to pull the apparatus are
affixed. That part of each of the tubes which is nearest the chain is perforated
at g¹ for a purpose to be hereinafter described. A dise shaped brush K is mounted
upon the chain, and helical springs L encircling loosely the tubes G nor-
mally press the disc or brush E apart from the brush K; these helical springs
being of such strength that the brush K, (being of larger diameter than
the discs or brushes E), the brush K is by its greater friction against the interior
surface of the pipe, drawn slightly towards that one of the discs or brushes E
which is behind in the movement of the device.
By unscrewing one of the caps or covers 9 paint, cement, or other coating, or
lining liquid may be introduced into the spaces between the brush K and the
discs or brushes E, or the liquid may be introduced to the spaces between the discs
through a suitable opening formed for that purpose in one of the discs, and closed
by a cover. The caps or covers being then replaced the device is drawn back-
wards and forwards with the result that the brush as before stated tending to
approach the rear disc the paint on other liquid is brought into contact with the
interior surface of the pipe and either deposited thereon or forced into any faults
or spaces therein.
In some cases tubes H are attached in place of the caps or covers g and these
extending any convenient distance a fresh supply of paint or disinfectant can be
introduced into the apparatus without drawing it back to the pipe opening through
which it is introduced.
In Fig. 5 the discs or brushes E are fixed to the ends of one pipe G and the
brush K is mounted so as to be capable of sliding freely on the middle part
of this; the helical springs L are employed and serve the same purpose as before
described.
In some cases one of the discs E is of larger diameter than the other; this
is shewn in Fig. 6 and is of especial use when the apparatus is applied to vertical
pipes.
In general the cleaning apparatus illustrated in Figs. 1, 2 and 3, is first used,
and this is followed by one of the apparatuses for painting or lining, shewn in
Figs. 4, 5, and 6; but either apparatus may be used independently of the other
according to the purpose required.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed I declare that what
I claim is:-
1. A method of cleaning and lining or painting the interior surfaces of drain and
other pipes which consists in first passing a cleaner or scraper of the description

page_text: herein before described through the drain or other pipe, and following this by a
painting or lining device, as herein before described.
2. A cleaner or scraper for cleaning drain pipes and the like, in which two
hollow cones are connected together with their apices presented to each other,
and to which ropes chains or rods can be attached for the purpose of drawing or
thrusting them through the pipe to be cleaned, substantially as described and
shewn.
3. A device for painting or lining the interior of drain pipes and the like,
which consists essentially of two discs or brushes mounted upon axially disposed
tube or tubes through which paint, cement or disinfectant can be introduced to
the space between the two dises or brushes; and in which a disc brush is mounted
between the two in such manner as to be capable of approaching to, or receding
from either of the discs or brushes; the whole apparatus being capable of being
passed backwards or forwards through the drain or other pipe to be cleaned sub-
stantially as shewn and described.
4. The apparatus for clearing, cleaning, painting drain and like pipes substan-
tially as hereinbefore described and shewn.
Dated this 20th day of Danamh
1000
WILLIAM J. MUNDEN,
75, Chancery Lane, London, Agent for the Applicant.