Sealed and lubricated rock bit with air protected seal ring
Номер патента: CA1148137A
Опубликовано: 14-06-1983
Автор(ы): Edward M. Galle
Принадлежит: Hughes Tool Co
Опубликовано: 14-06-1983
Автор(ы): Edward M. Galle
Принадлежит: Hughes Tool Co
Реферат: ABSTRACT OF THE DISCLOSURE An earth boring rock bit having a sealed bearing and pressure lubrication system for drilling the earth with air or gas as the circulating medium. An annular groove is formed in the vicinity of the seal and connected to the in-terior of the bit for cooling the ring and cleaning debris from the area of the ring. The air pressure inside the bit is utilized to bias a movable element in the system to urge lubricant to the bearing.
Cutter actuated rock bit lubrication system
Номер патента: CA1095503A. Автор: D.F. Walters. Владелец: Dresser Industries Inc. Дата публикации: 1981-02-10.