GB930011A - Improvements in or relating to rock-drilling machines - Google Patents

Improvements in or relating to rock-drilling machines

Info

Publication number
GB930011A
GB930011A GB993960A GB993960A GB930011A GB 930011 A GB930011 A GB 930011A GB 993960 A GB993960 A GB 993960A GB 993960 A GB993960 A GB 993960A GB 930011 A GB930011 A GB 930011A
Authority
GB
United Kingdom
Prior art keywords
piston
feed
cylinder
control
screw
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB993960A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gebrueder Boehler and Co AG
Original Assignee
Gebrueder Boehler and Co AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gebrueder Boehler and Co AG filed Critical Gebrueder Boehler and Co AG
Publication of GB930011A publication Critical patent/GB930011A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/08—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods
    • E21B19/086—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods with a fluid-actuated cylinder

Abstract

930,011. Percussive tools. BOHLER & CO. A.G. GEB. March 21, 1960 [March 21, 1959], No. 9939/60. Class 124. A control means for a rock drill feed comprises a control cylinder controlling a motor to advance a feed cylinder along a feed element, compressed air being admitted to one end of the control cylinder to move the control piston and energize the motor when the feed piston has moved a predetermined distance in the feed cylinder. As shown, a feed cylinder 1 connected to a feed screw 3 has a feed piston 4 under constant air pressure in a space 7. A control piston 10 has one end 12 under the same constant pressure and is provided with a groove 14 which, in one extreme position of the piston, connects a supply of compressed air to an air motor driving the feed screw 3. A pipe 16 connects the other end 13 of the piston 10 to the feed cylinder so that when the feed piston moves past the pipe 16 the constant pressure is applied to the end 13 of the control piston, the end 13 being of greater area than the end 12 and the control piston is moved to the one extreme position resulting in operation of the screw 3 and advance of the cylinder 1. When the cylinder has advanced so far that the skirt of the piston 4 passes the pipe 16 the piston 10 returns to its original position and stops the motor. The control piston may be urged to its original position by a spring, Figs. 2 and 3 (not shown), and the screw 3 may be replaced by a rack.
GB993960A 1959-03-21 1960-03-21 Improvements in or relating to rock-drilling machines Expired GB930011A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT221559A AT217406B (en) 1959-03-21 1959-03-21 Control for the step-by-step feed of rock drilling machines

Publications (1)

Publication Number Publication Date
GB930011A true GB930011A (en) 1963-07-03

Family

ID=3530152

Family Applications (1)

Application Number Title Priority Date Filing Date
GB993960A Expired GB930011A (en) 1959-03-21 1960-03-21 Improvements in or relating to rock-drilling machines

Country Status (3)

Country Link
AT (1) AT217406B (en)
DE (1) DE1907408U (en)
GB (1) GB930011A (en)

Also Published As

Publication number Publication date
DE1907408U (en) 1964-12-31
AT217406B (en) 1961-10-10

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