Rotary drill bit
Номер патента: CA1126722A
Опубликовано: 29-06-1982
Автор(ы): Angelo Vignotto, Gosta Norlander, Mario Micca
Принадлежит: S K F AB, Sandvik Ab
Опубликовано: 29-06-1982
Автор(ы): Angelo Vignotto, Gosta Norlander, Mario Micca
Принадлежит: S K F AB, Sandvik Ab
Реферат: Abstract A rotary roller bit comprising at least one rotatably carried roller cutter (12) and provided with sealing means (21) for preventing impurities from entering into the bearing system (14, 15, 16,) of the roller cutter. For purposes of preventing axial and wobbling movements of the roller cutter (12) relative to the bit head from creating high contact pressure at the contact surface between the sealing means (21) and the surface against which same seals the sealing means (21) is provided with an elastically yieldable tongue (25) which extends radial-ly relative to the rotational axis of the roller cutter (12).
Roller cutter drill bit having a texturized seal member
Номер патента: US4619534A. Автор: Jeffery E. Daly,Robert J. Kotch. Владелец: Reed Tool Co. Дата публикации: 1986-10-28.