Down-the-hole hammer

Details Down-the-hole hammer Down-the-hole hammer

1976-09-02

1977-09-27

Staab, Lawrence J.

Tool driving or impacting

Drive controlled by relative axial movement of tool

Drive motor controlled

173 66, 173 73, 91232, 92222, B23Q 5027

Patent

active

040505251

ABSTRACT:
A down-the-hole hammer of the type adapted for receiving a bit at the lower end and for being connected to the lower end of a drill string through which compressed air is supplied to the hammer. The supply of air to the hammer when the bit at the lower end is resting on the bottom of the hole causes a piston in the hammer to reciprocate and to beat upon the upper end of the bit so that the material at the bottom of a hole is reduced. The piston, by reciprocating in the hammer, accomplishes the valving of the fluid which causes the piston to reciprocate, and when the hammer is lifted from the bottom of the hole and the bit moves downwardly, the piston ceases reciprocation while air blows off through the bit to the bottom thereof to clear debris from the hole being drilled.

REFERENCES:
patent: 643063 (1900-02-01), Johnson
patent: 799406 (1905-09-01), Schmucker
patent: 957708 (1910-05-01), Padbury
patent: 1108834 (1914-08-01), Detrick
patent: 1160578 (1915-11-01), Clement
patent: 2800884 (1957-07-01), Mori
patent: 3606930 (1971-09-01), Curington
patent: 3804181 (1974-04-01), Curington et al.
patent: 3809540 (1974-05-01), Mal et al.

Affiliated with

Also associated with

Rating

Down-the-hole hammer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Down-the-hole hammer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Down-the-hole hammer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1809283