Note: Descriptions are shown in the official language in which they were submitted.
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BACKGPOUND OF THE INVE~TION
It is required in many pipe lining operations to
provide in an apparatus for lining pipe with cementitious
material a means for ad~justing the periphery of the apparatus
so that the same may be readily ad~usted for use in pipes
of various diameters.
Prior endeavors have been directed to effecting
ci.rcumference change only in a protion of the apparatus,
such as by expanding flexible tail sections such as disclosed
in United States patent 2,555,377.
Toggle-like expansion joints were used to spread
overlapping edges of a section cylinder body such as is
; illustrated in United States Patent 126,100.
- A neck made of flexible material such as rubber,
was employed to permit the flexing of the side wall section
of a cylinder body in United States patent 2,711,000.
. By restricting and limiting the expansion or flexibility
of only a portion of the bell body, as evidenced by the
prior art, created unsupported localized stress, that by
reason of the wet weight of the cementitious material soon
ruptured bent or broken, all or parts of the expanding
parts, rendering a void in the placement and packing of
the lining material against the pipe to be lined.
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It is an object of this invention to eliminate
; the problems and structural defects of the prior art.
SUMHARY OF THE I~VE~TIO~
. In lining chimeny pipes with a cementitious material,
it is desirable to apply a uniform thic~ness of such material
under compacting to the interior surface of the pipe.
A This uniform thickness assures a proper dehydration of
the material and its resulting adhesiveness to the interior
surf`ace.
: ~ To achieve the above, the outer.diameter of the
51ip must conform to the inner diameter of the pipe to
be lined, providing the proper clearance therebetween,
for the deposi.t of the cementitious material upon the existing
pipe surface.
Thus it is an object of the invention to provide
a slip construction that will permlt the circumferential
adjust.ment of its body to the required inner diameter of
the pipe to be lined, without affecting the functions of
the compacting vibrational mechanism within the body.
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Another object of this invention is to provide
a means for detecting the proper amount of lining mixture
to be present at the forward end of the apparatus to assure
proper lining conditions. This means comprises a pair
of internal switches havlng exposed actuators which respond
to depressing contact of a yieldably supported cap-like
member.
A further ob,ject of this invention is to provide
an internal rearwardly focused light that will illuminate
the finished lining condition of the pipe immediately down-
stream of the apparatus's operation.
Still another object of this invention is to provide
a reduced inwardly directed tapered trailing edge which
would permit the apparatus to be retracted in the chimney
to be lined when it is found to be necessary to reline
a section once the apparatus has passed therebeyond.
Yet another ob~ject of this invention is to provide
a pipe lining apparatus which is more durable, economical
; efficient than prior known lining machines of this type.
The above and other object and advantages of the
present invention will appear more fully hereinafter from
a consideration of the detailed description which follows.
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BRIEF DESCRIPTION OF THE DRAWINGS
This invention will be best understood by reference
to the accompanying drawings which illustrate the preferred
constuction and arrangement of parts by which the ob~jects
of this invention are achieved, and in which:
Fig. 1 is a side elevational view of the chimney
lining slip form of this invention,
F`ig. 2 is side elevational detailed sectional view
of the chimney lining slip form of this invention,
Fig. 3 is a side elevational view of a modified
form of this invention,
Fig. 4 is a perspective view of the respective
parts of the apparatus of Fig. 3 shown in exploded relation
and,
Fig. 5 is a perspective view of the apparatus of
Fig. 3 including expansion panels all shown in exploded
relationship.
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GENERAL DESCRIPTION
Referring to Fig. 1 there is shown the improved
chimney lining slip form comprising a generally hollow
circular body 10 comprising two complimentary bell sections
11 and 12. At the forward end of the body 10 are two compli-
mentary cone sections 13 lnd 14, while at the trailing
end there are two complimentary tail sections 15 1nd 16.
As illustrated in Fig. 2 each of the sections forming
the body 10 are provided with internally positioned ring-shaped
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bolt flanges 17, 18 and 19. :[t should be noted that the
bolt flange 17 provides an outer partially tapered edge
portion 20 corresponding to the inclination of the interior
walls of the cone sections 13 and 14. Likewise the rear
flage 19 provldes a partially tapered outer peripheral
wall which mates with the inwardly trailing tail section
22 of the body 10. It is proposed that these bolt flanges
17, 13 and 19 be welded to one section and be provided
with threaded apertures which will receive suitable connecting
bolts 23.
Each of the cone sections 13 and 14 provide a partiai
truncated top wall 24 and 25. The confronting edges of
which are correspondingly semi-circularly notched to provide
an opening 26 through which extends a cablc connecting
eyelet 27.
As illustrated in Fig. 2 the cone section 13 provides
a bolt guide 28 which is in longitudinal alignment with
an internally threaded bolt receiving sleeve 29 carried
on the inner wall of the cone section 14. through an appro-
priate opening 30 formed.in the wall of the cone section
13 and which is in alignment with the bolt guide 28 a con-
necting bolt 31 rnay pass through the cable eyelet 27 and
be threaded into the bolt sleeve 29. By this arrangement
the body 10 is removably connected to the lifting cable
32.
Adapted to be seated upon the truncated top walls
24 and 25 are the base coils of an expansion spring 33.
This spring 33 is adapted to encircle the cable eyelet
27 and to function to yieldably space a hollow cup-like
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cap 34 off of the forward end of the cone sectlons 13 and
14 of the body 10. As clearly illustrated the cap 34 is
provided with a center opening 3a which freely and slidably
receives both the cable 32 and the cable eyelet 27.
Adjacent to the upper ends of the cone sections
13 and 14 and interiorly thereof there is provided a pair
of push button switches 36. Each of the switches provides
an exposed actuator 37 which protrudes out of suitable
openings formed in the wall sections as shown. These switches
are adapted to be activated when their respective switch
actuators 37 are depressed by their contact with the internal
tapered wall surfaces of the Gap 34 when the appartus is
in operation as hereinfter described.
Each of the bell sections 11 and 12 provide internal
shelves 3~ which form a base for a vibrator 39 aw well
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as a support for the electrical control housing 40. A
vibrator pad 41 is mounted on these shelves and functions
to maintain the vibrator 39 and housing 40 in a stable
position within the body 10. The electrical housing 40
provides a electrical source cable 42, and there is provided
a electrical source cable 43 between the electrical housing
40 and the vibrator 39. While the electrical supply cable
42 is illustrated as extending out of the open trailing
end of the body 10 it may be designed so as to exit out
of the top as well.
Carried by the electrical housing 40 is a focused
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light~f. This light will be focused so as to project
out of the open trailing end of the body 10 so as to provide
illumination upon the finished lining applied by the apparatus.
Referring to the construction of the modified lining
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apparatus 45 of Fig. 3 it is shown that the cone sections
46 and 47 are formed to provide connecting rings 48 to
which the lifting cable can be attached. The bell sections
49 and 50 provide internal braces 51 to which, by means
of bolts 52, a vibrator 53 is attached.
As each chimney to be lined provides varying internal
dimensions it is desirable to be able to vary the diameter
of the chimney liner to meet such requirements. ,To accomplish
this I have provided additional expansion panels ranging
o in various widths.
Referring to Fig. 5 there is illustrated expansion
panels 53 and 54, including cone expansion panels 55 and
58. In this construction these expanding panel's sides
56 and 57 as well as the corresonding side edges of the
~5 bell panels 49 and 50 wi,ll mate and overlay a connecting
strip 60 (only one shown), and be bolted together by connectors
~, ' 59.
It is to be understood that the sectional construction
of the apparatus as shown in Figs. 1 and 2 may be likewise
expanded along their confronting longitudinal edges.
In operation the apparatus 10 is suspended by cable
' 32 within the lower portion of the chimney or pipe to be
lined'. The cementitious material known in the trade as
"mud" is poured down upon the'apparatus with the weight
-5 thereof forcing the cap 34 to compress the spring 33 so
that the cap 34 engages and actuates the switch actuators
37. These switches will signal the presence of the mud
in sufficient quantity to commence the lining operation.
They may also function to actuate the vibrator 39.
As'the mud is dispensed about the cone sections
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13 and 14 it is caused to pass in the space between the
body 10 and the interior chimney wall which is to be lined.
The action of the vibrator 39 will effect even distribution
of the mud and compact it against the chimney wail. In
the event of an insufficient quantity of mud the spring
33 will expand and move the cap 34 off the switch actuators
37 which in turn will alert the operator, through an alarm
(not shown), electrically connected to one of the switches
36 of the situation.
As the apparatus 10 is drawn through the chimney
or pipe to be lined the rearwardly focused light 44 will
illuminate the completed work area so that a visual inspection
can be readily made. In the event that a repeated application
is required the apparatus 10 may be lowered by the cable
32 to the area to be repaired. The reverse movement will
be guided by the tapered trailing edge 22 which will prevent
gouging or displacement of the packed mud lining.
From the foregoing it is apparent that I have provided
a novel construction for a lining apparatus which is highIy
efficient in use, economical in manufacture amd readily
adaptable to varying internal demensions.
While have illustrated and described the preferred
form of constuction for carrying my invention into effect,
this is capable of variation and modification without depart-
ing from the spirit of the invention. I therefore do not
wish to be limited to the precise details of construction
as set forth, but desire to avail myself of such variations
and modification as come within the scope of the appended
claims.
