Tool driving or impacting – Advance causing or controlling means – Tool advances relative to drive
Patent
1986-03-10
1987-02-17
Schran, Donald R.
Tool driving or impacting
Advance causing or controlling means
Tool advances relative to drive
279 4, B23Q 500
Patent
active
046432620
ABSTRACT:
A pressurized medium actuated gripping device which is included in a rock or earth drilling machine for rotary drilling, and is adapted for gripping a drill rod for transmitting rotation and/or axial movement to a string of drill rods, said gripping device including a rotatable housing in which gripping jaws arranged around the drill rod are movable substantially radially relative said rod, and also a sleeve-shaped piston element of elastomeric material, which is sealingly arranged in the housing for separating a pressure chamber, arranged for the supply of pressurized medium and between the housing and the piston element, from a central space, wherein the gripping jaws are arranged, and which is adapted for actuating the gripping jaws into engagement with the drill rod when the pressure chamber is supplied with pressurized medium. The piston element is provided with surfaces which are substantially radially displaceable relative walls surrounding the pressure chamber inside the housing and seal against these walls.
REFERENCES:
patent: 2864148 (1958-12-01), Wait
patent: 3250542 (1966-05-01), Winnen et al.
patent: 3565187 (1971-02-01), Jonsson
patent: 4262756 (1981-04-01), Blanz
patent: 4422653 (1983-12-01), Piotrowski
Craelius Aktiebolag
Schran Donald R.
Wolfe James L.
LandOfFree
Pressurized medium actuated gripping device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pressurized medium actuated gripping device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pressurized medium actuated gripping device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1932446