Patent ID: 8056647
Filing Date: 2011-11-15
Classification: E21B

Abstract:
1. A telescopic feeder device for a rock drilling machine, said device comprising a first beam arranged in sliding cooperation with a second beam, said first and second beams arranged for sliding in parallel along their respective longitudinal axes between a fully retracted end position of said feeder device and a fully extended end position of said feeder device, said feeder device further comprising an adjustable sliding arrangement for maintaining the first and second beams at a predetermined distance from each other, wherein the first beam comprises at least one guiding stud extending from and beyond one end of said first beam and in parallel with the longitudinal axes of said first and second beams, and wherein said at least one guiding stud is guided into at least one recess in the second beam during retraction of the first and second beams to engage with the recess in the fully retracted end position of the feeder device to allow adjustment of the sliding arrangement when said at least one guiding stud is engaged with the recess.