Boring or penetrating the earth – With tool drive prime mover or above-ground mechanical... – With diversely operated shafts extending into bore
Patent
1981-03-23
1982-12-28
Pate, III, William F.
Boring or penetrating the earth
With tool drive prime mover or above-ground mechanical...
With diversely operated shafts extending into bore
175 53, 175325, E21C 900
Patent
active
043656773
ABSTRACT:
Large hole boring equipment is used for boring a large diameter blind pilot hole. Then such equipment is removed from the hole and a room is blasted at the closed or blind end of the hole. Then the large hole cutterhead is replaced by a reamer and the equipment is inserted back into the hole. The reamer is an adjustable diameter type and its diameter is increased once it is within such room. A wrench carried by a drive head of a drilling machine is used to rotate a small diameter shaft which extends downwardly through the drill string to a lead screw which is a part of the reamer. Rotation of the lead screw causes axial travel of a lead nut. As the lead nut travels it moves a plurality of links which in turn swing a plurality of cutter carrying arms outwardly from the axis of rotation. Once the desired fly diameter of the reamer is achieved, the wrench is removed from the drive head, then the small diameter shaft is locked against additional rotation, and the drive head is drivingly attached to the upper end of the drill string so that it can be used for rotating the drill string and the reamer attached thereto.
REFERENCES:
patent: 1317192 (1919-09-01), Jones
patent: 1402786 (1922-01-01), Muehl
patent: 1498463 (1924-06-01), McCloskey et al.
patent: 1499938 (1924-07-01), Leedom
patent: 1561523 (1925-11-01), Riedle
patent: 1618294 (1927-02-01), Olson
patent: 2139323 (1938-12-01), Zum-Berge
patent: 2203246 (1940-06-01), Zum-Berge
patent: 2783974 (1957-03-01), Veasman
patent: 2799475 (1957-07-01), Harlan et al.
patent: 2868510 (1959-01-01), Dean
patent: 2886288 (1959-05-01), Gehrke
patent: 3112802 (1963-12-01), Amann et al.
patent: 3231029 (1966-01-01), Winberg
patent: 3280416 (1966-10-01), Forsyth
patent: 3302983 (1967-02-01), Garrett
patent: 3599734 (1971-08-01), Farris
patent: 3757876 (1973-11-01), Pereau
patent: 3858667 (1975-01-01), Goodfellow
patent: 4010808 (1977-03-01), Youngblood
patent: 4102413 (1978-07-01), Johnston
patent: 4270618 (1981-06-01), Owens
Pate III William F.
The Robbins Company
LandOfFree
Earth boring apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Earth boring apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Earth boring apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1333284