Apparatus for installing a flexible cured in place lateral seal in an existing main pipeline

• US 6,520,719 B1
• Filed: 02/28/2000
• Issued: 02/18/2003
• Est. Priority Date: 11/26/1997
• Status: Expired due to Term

• Current Assignee: INA Acquisition Corporation (Aegion Corp.)
• Original Assignee: Insituform Netherlands BV Incorporated (Insituform)
• Inventors: Tweedie, John, Severs, Kerry D.
• Primary Examiner(s): Will, Thomas B.
• Assistant Examiner(s): MAYO-PINNOCK, TARA LEIGH
• Application Number:
  US09/513,957
• Time in Patent Office: 1,086 Days
• Field of Search: 405/184.1, 405/184.2, 405/303, 405/146, 138/87
• US Class Current: 405/184.2
• CPC Class Codes: B29C 63/28 applied by "rubber" bag or diaphragm
• CPC Class Codes: B29C 63/34 using tubular layers or sheathings
• CPC Class Codes: B29K 2101/10 Thermosetting resins
• CPC Class Codes: F16L 55/179 specially adapted for bends, branch units, branching pipes or the like
• CPC Class Codes: F16L 55/265 specially adapted for work at or near a junction between a main and a lateral pipe

Abstract

An apparatus for installing a cured in place lateral seal in an existing main pipeline wherein the lateral seal includes a brim portion bonded to a short tubular portion. The apparatus includes a flexible bladder mounted on a cylindrical housing with the bladder having a recess with an inflatable arm which can be tucked within the housing for receiving the tubular portion of the seal with the brim portion along the outer portion of the bladder. The cartridge is removably mountable on a sled or robot device with positioning motors for positioning the seal at the opening of the lateral pipeline. The use of replaceable bladder cartridges allows an operator to load a second new seal on a cartridge a first seal on a bladder cartridge mounted on the sled is being cured in place.

Claims

1. A sled for carrying an inflation device within an existing pipeline or conduit, the sled comprising:

an elongated base having a first end and a second end;

support means for supporting the base, the support means being mounted to the base;

at least one lifting means including a channel and having at least one mounting arm movably positioned in the channel for raising and lowering the at least one mounting arm, the at least one lifting means being located at one of the first and second ends of the base; and

at least one rotating means for rotating the at least one mounting arm about a longitudinal axis of the base;

wherein the at least one lifting means and the at least one rotating means are both selectively and independently operable for selectively positioning an inflation device within the pipeline or conduit.

2. The sled of claim 1, wherein the base is formed of two elongated base members joined together by a hinge for aiding in insertion of the sled into an existing pipeline or conduit from an access opening.

3. The sled of claim 1, wherein the at least one lifting means includes a rack and pinion.

4. The sled of claim 1, wherein the at least one rotating means includes a rotational motor for rotating an inflation device when the device is positioned on the mounting arm.

5. The sled of claim 1, wherein the at least one lifting means includes a lift motor at both the first and second ends of the base of the sled.

6. The sled of claim 5, wherein the lift motors are operable separately.

7. The sled of claim 5, wherein both lift motors are selectively rotatable for rotating an inflation device.

8. The sled of claim 5, wherein the at least one mounting arm is adapted to allow for selective removal of an inflation device from the sled.

9. The sled of claim 1, wherein the means for supporting the base are sled runners.