Back to results
US 2009/0288883 A1Published application
Swivel for use in installing large diameter casing
OwnerJames S. Barberainventor
Life of this patent
Estimating the term…
Abstract
The invention includes a pair of swivels for use with an auger boring machine. One of the swivels allows for rotation of a first auger of a first auger assembly connected to the trailing end of a pilot tube without rotating the pilot tube. The other swivel allows for rotation of a larger diameter second auger connected to the trailing end of the first auger assembly without rotating the first auger. Each of the swivels includes a thrust bearing.
Claims20
A method comprising the steps of:
- pushing a smaller diameter cylindrical casing forward with a first section of a swivel through an underground hole having a first diameter;
- and
- during the step of pushing, rotating a second section of the swivel, a first cuffing head rearward of the smaller diameter casing and a first auger rearward of the first cutting head relative to the first section and smaller diameter casing to enlarge the underground hole from the first diameter to a second diameter larger than that of the smaller diameter casing.
A method comprising the steps of:
- rotating a smaller cutting head and smaller auger of a smaller auger assembly to cut an underground hole having a first diameter;
- mounting a first section of a swivel on a trailing end of the smaller auger assembly after the underground hole with the first diameter has been cut;
- and
- rotating a second section of the swivel, a larger cutting head and a larger auger of a larger auger assembly relative to the first section to enlarge the underground hole from the first diameter to a second diameter larger than the first diameter.
1 more element
A method comprising the steps of:
- pushing a swivel forward with a first auger assembly through an underground hole having a first diameter;
- the swivel comprising first and second sections mounted on one another with relative rotation therebetween;
- the first auger assembly comprising a first cutting head and a first auger;
- during the step of pushing, rotating the second section, first cutting head and first auger relative to the first section to enlarge the underground hole from the first diameter to a second diameter larger than the first diameter;
- the step of rotating comprising the step of rotating the first auger within a cylindrical casing having a diameter larger than that of the first diameter;
- and
- moving the casing forward into the enlarged underground hole.
4 more elements
Dependencies are inferred from the claim text.