US1054857A - Sealing the joints of sectional concrete pipe. - Google Patents

Description

J. C. MITCHELL.

SBALING THE JOINTS OF SECIONAL CONCRETE RIPE APPLICATION FILED MAR. 15. 1909 Patented Mar'. 4, 1913.

2 sHBETsjsHEET 1.

J. C. MITCHELL. SBALING THE JOINTS 0F SECTIONAL CONCRETE HPB.

APPLIG'IIONV FILED UL'AR l5, M909. A 1,054,857. Patented Mal. LL,l 1913;

2 SHEETS-'SHEET 2" QUE, y .A www1. Simmel/V606,

JHN C. METCHELL, GF NEWPORT NEWS, VIRGINIIA. l

SALING- THE JOITS F SECTIONAL CGNCRETE PIPE,

' Specieetion fsf-Lettere eaten@ Patented Mar. 4, 1913.

Application filed Merch l5, i999. ilaria! No. 83,344.

'To all whom, t may concern:

Be it known that l, .loner @-Mrrcnnnn, n citizen of the United States, residing et Newport News, county ci: Werwicig land State ot Virginia, have invented certain new and useful improvements in Seeling the Joints ot' Sectional Concrete Pipe, of lvvl'iich the following is n, full, clear, end exact description.

This invention relates to sectional ooncrete pipe, more particularly to the making of tbe joints between the )ipe sections, and has for its object to provi e means for seeling the sections together in en el'ective end expeditious manner.

in the annexed drawingslhaveillustretefl ihe invention in the liorm which l consider y to exhibit the best inode of applying the invention in practice, with special reference to concrete pipe oi tbe type described in the prior patent. of Coleman Meriwether', No. 884,517, dated July 28, 1908, but l desire it A understood that the invention is not limited to use with that particular kind of ipe.

Referring now to the drewings, *ignre l is a longitudinal section of a concrete pipe, showing the circular band employed i'or closing the inner groove of the ppejOint. Fig. 2 is a cross section on line H-ll of Fig. l, showing also the elevice employed for forcine lastic or semi-li uid concrete h into the joint-groove. Fig. '3 is a develop- :nent of e portionof groove--closing bend.

The pipe sections 1, 2, 3, illustrated in the drawings, are cylindrical :incl :ire provided with bell end spigot 7 ends formed in such manner as to leave sin undercut groove, es e, on the. in-sicie of the pipe when ilie sect-ions are assemble with the spigot end of one fitting into the bell end of its neighbor. Embedded in the pipe sections are suiieble meslied reinforcing fabrics 5, which extend ont of the ends of the sections sind overlap each other in the seid grooves, es shownat 6, Fig. l. 'lbese grooves ere to be lllecl with concrete, which, embedding the over-- lapping reinforcements, serves tobiml the pipe sections rnily together.

designates e strip of resilient metal, preereblv sheet steel, curved to a more or less circol er form endl in circumferential ex- 'tent or length equal to or very slight-ly less than the inner circumference of. the pipe in which it is to be used. This bend Z is provided with n plurality of apertures 8, preferably rectangular, and over esclieperture the ber or plete 12,

lis e suitable closure, for sliding in guides or gibs 10. Fixed securely et one end of the band is a member 11, and hinged t-heretcis e siiB ber or plete 12, the free end of which is adapted to engage an inclined cam member 13 fixed on the other end of the band.

le designates c device in the nature of a force-pump, the cross section of which is the same', in shape, es the ormiof the apertores 8 (in the present case rectangular) the size of said pump device in cross Asection being such that when inserted into one of.

the apertures and turned ouil ofthe radial position, :is shown in Fig. 2, the device Will t the aperture closely and thereb prevent the leakage'or escape of the liqui or semiliquiai concrete with which the groove is filled. Working in the casing or bod portion i5 of the cievice is 16 the reciprocation of which fills the casing with material (by suction) through the open forward, end of the casing or body portiop Aendl expels the seme again.

The method. of using the devices described above is as follows: -A pair of pipe sections being assembled es in Fig. of the groove is packed with concrete by ineens of e trowel or othey,1 suitable iin lement, to a. point about half way up the sides of the. pipe. The bend 'E' is now placed in position, with the apertures 8 over the unfilled part of the groove end the bar l2 is forced irmly down against the member 13, the inclined face of which, cooperating with causes the bandzto be expancled against and into close conformity with the inner surface of the pipe. The puin device 14 is then filled with concrete 'whici is liquid enough. to [low and is inserted, in the manner shown in Fig. 1, .into the aperture nearest-to the concrete already in the roove at one side of the pipe. The piston is then pushed in, expelling thev concrete. IThe size of the pump or filling device is preferably so proportioned es to hold inst enough, or slightly more than enough, the aperture next to' lill the groove up to above. When the concrete is Yseen at the level of the next upper aperture the filling device is withdrawn enel the gate closed, which can be e'ecte,"by the exercise of a little dexterity without the escape of mete-l rial through tbe aperture in which the lilling device hed been inserted. The-opcitations described ere repeated up to the top example eplete 9 a piston or p anger 1, the lower part of the pipe, then on the other side of the pipe, and lastly the remaining space at the center. As soon as the concrete has set s'uli ciently the band is loosened and stripped oi, leaving the inner suraceof the Joint 'smooth and flush with the surface of the oiconstruction, but lconsider such changes to be Within the proper scope of the invention as dened by the appended claims.

What I claim is: l. 'A resilient metal bandlor closing the inner circumferential groove at the joint of a sectional concrete pipe, in combination with means for expanding the band to close the -eiylfenmferential groove, said means lo cated entirely on said band and operating to maintain Vthe metal band over the circumferential groove, said band having a plurality of perforations, and means for forcing concrete through said perforations into the circumferential groove.

. 2. A. substantiallyeircular resilient metal band adapted to close a circumferential been found to groove on the inside of a pipe and whose circumferential extent or length is suhstan" t-Ially equal to the inner circumference ot` the pipe in which it is to be used, said resilient band having means Wholly supported thereon and leaving the conduit substantially unobstructed for removably maintaining the same in position and having per- 'orations therein in combination with means on the interior of said conduit for forcing concrete or grout through said band into the circumferential groove.

3. A limber band having disconnected ends and adapted to be placed over an in teriorl groove formed between individual sections of a conduit, said band comprising means on one end coperating with means on the other to expand said band uniformly throughout its circumference into conformity with said conduit and cause the same to engage the concrete pipe at all oints adjacent said groove, said coperating means being readily disenga eable from each other and so located and o such dimensions as to provide a' substantially unobstructed pas sage in said conduit.

' In testimony whereof I afiix my signature in the presence of two subscribingwitnesss.

JOHN C. MXTGHELL.. Witnesses: M. LAWSON Drain'.

S.S. DUNHAM. ri;

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