Drilling apparatus with anti-vibration inertial body

Details Drilling apparatus with anti-vibration inertial body Drilling apparatus with anti-vibration inertial body

2006-12-05

2006-12-05

Bagnett, David J. (Department: 3672)

Boring or penetrating the earth

With above-ground means to feed tool

C175S122000, C175S203000, C074S572210, C074S572200, C464S182000, C403S359100, C173S162100

Reexamination Certificate

active

07143845

ABSTRACT:
A blast-hole drilling rig includes a carriage, a mast disposed on the carriage, and a rotary head mounted on the mast for up-and-down movement. The rotary head includes: a housing forming an internal chamber, a hydraulically driven motor, and a rotation transmission mechanism disposed in the chamber. The rotation transmission mechanism includes a gear system having a high-speed power input section operably connected to the motor, and a low-speed power output section adapted for connection to a drill pipe. The rotation transmission mechanism includes an anti-vibrational inertial body forming part of the high-speed power input section for storing rotational energy to even-out rotary speed variations and resist the generation of vibrations during operation. The inertial body includes a downwardly open recess in which the motor casing extends, wherein the motor projects downwardly past a bottom wall of the housing.

REFERENCES:
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patent: 3534636 (1970-10-01), Lorence
patent: 4270410 (1981-06-01), Herscovici
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patent: 5092432 (1992-03-01), Taig
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patent: 5650684 (1997-07-01), Suganuma
patent: 6026909 (2000-02-01), Hon
patent: 2004/0043821 (2004-03-01), Ushimaru

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