Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,...
Patent
1989-01-30
1990-10-23
Taylor, Dennis L.
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
175 77, 166 557, 405303, F16L 100, B23B 4100
Patent
active
049647598
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates generally to the field of apparatus for selectively rotating a tool relative to the wall of a conduit, and, more particularly, to an improved device for selectively drilling one or more holes through the wall of an underground storm sewer prior to a grout- or sealant-applying operation.
BACKGROUND ART
Sewers are pipes or conduits used to convey or direct various liquids, with or without entrained or suspended solids, from one point to another. There are generally two types of sewers: sanitary sewers and storm sewers. Sanitary sewers are used to convey sewage, waste water, and the like from a source (such as a house) to a suitable treatment facility. Storm sewers, on the other hand, are generally used to convey drainage or run-off water. In either case, it is generally desired to minimize the leakage of ground water into the sewer, be it of the sanitary- or storm-type. In the case of sanitary sewers, any such ground water leakage increases the volume of fluid that must be treated. In the case of storm sewers, such ground water leakage unnecessarily increases the volume of liquid carried by the sewer, and may exceed disposable or dispersal capabilities. Thus, it is generally desired to minimize the amount of ground water entering the sewer.
Sewers develop leaks for various reasons. Whatever the cause, such leaks permit ground water to enter the sewer. The ground water is generally pressurized positively relative to the pressure within the sewer, such that the ground water will flow naturally through any leakage path into the sewer.
The problem of repairing or sealing such leaks in sewers is complicated by the fact that such sewers are typically subterranean, and may be buried as deep as thirty feet beneath the surface. One technique, of course, is to dig up the entire sewer to expose the damaged portion. Another technique is to apply a grout or sealant from within the sewer to repair the damaged portion. However, such grout or sealant is typically applied to the inside of the sewer. Thus, its integrity is determined by the extent to which the grout or sealant adheres to the wall of the sewer. Many sewers are formed of a suitable plastic material, which further complicates the problem of adhering the grout or sealant thereto. Thus, there has long been a need to provide a device to allow the grout or sealant to pass through the sewer so as to bond to the outside thereof.
Additional details as to prior art sewer repair devices are shown in the following U.S. Pat. Nos. 3,834,422 (Larson), 3,915,197 (Piccirilli), 3,951,173 (Larson), 4,170,248 (Bennet et al.), 4,244,895 (Nakashin), 4,296,932 (Grobler), 4,529,008 (Appleton), 4,572,228 (Larson et al.), and 4,627,471 (Parkes et al.).
DISCLOSURE OF THE INVENTION
The present invention provides an improved device for selectively drilling one or more holes through the wall of a conduit, such as a sewer, prior to the application of grout or sealant. By providing such holes with the improved apparatus, the subsequently-applied grout or sealant may pass through the wall of the conduit and bond to the outside thereof, so as to provide a long-lasting seal of high integrity.
The improved device broadly includes: a frame adapted to be positioned within a conduit and translated (i.e., pulled, pushed, or self-propelled) to a particular desired location therealong; a chuck rotatably mounted on the frame; a motor operatively arranged to selectively rotate the chuck at a desired rotational speed (i.e. either fixed or variable); a suitable tool (e.g., a drill) releasably held in the chuck; and an actuator mechanism acting between the frame and chuck and selectively operable to cause the tool to move away from the frame to engage the wall of the conduit.
Accordingly, the general object of the present invention is to provide an improved device for rotating a tool relative to the wall of a conduit.
Another object is to provide an improved device for drilling a plurality (i.e., one or more) holes through the wall of a subterranean sewe
REFERENCES:
patent: 3175392 (1965-03-01), Tharalson et al.
patent: 3301337 (1967-01-01), Vaughn et al.
patent: 4197908 (1980-04-01), Davis et al.
patent: 4442891 (1984-04-01), Wood
patent: 4648454 (1987-03-01), Yarnell
patent: 4768899 (1988-09-01), Dysarz
Guzzetta Charles A.
Guzzetta Gerald J.
Hornberger David E.
Schadt Larry M.
Guzzetta Gerald J.
Taylor Dennis L.
LandOfFree
Apparatus for selectively rotating a tool relative to the wall o does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for selectively rotating a tool relative to the wall o, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for selectively rotating a tool relative to the wall o will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-763096