US 4,215,901 AGranted

Hydraulically actuated tool for mechanically splitting rock-like material

AssigneeEdward R. Langfield

InventorsEdward R. Langfield, James L. Hile, David L. Hird

Life of this patent

Estimating the term…

Loading patent…

Abstract

A rock splitter tool is hydraulically actuated by a piston which moves a tapered wedge between feathers mounted at one end in a retaining means. The feathers and wedge, as an assembly, are inserted into a predrilled hole and the wedge is driven forward by the hydraulic piston to move the feathers outwardly to split the rock. The present invention is directed toward providing a hydraulically moved wedge in which the feathers and wear plate portions are retained by a clam shell clamp and retainer which are readily separated and removed to enable an inspection and/or replacement of any damaged apparatus. This clam shell clamp enables existing apparatus to be converted. Auxiliary apparatus utilizing a jack hammer device is also shown as is a hydraulic pulsation developing rotary valve which is adapted to cycle the wedge as it is moved forwardly.

Claims8

Dependent claims

Apparatus for splitting rock and the like in which in an outer housing is mounted a combined hydraulic cylinder and a pneumatic vibrating cylinder, the apparatus including:

(a) a retaining housing having an upper and a lower portion and having means for securing at its upper closed end including a hydraulic cylinder having a piston and a piston rod extending from and through a lower closing end of the cylinder;
(b) means for removably connecting the extending rod end of the hydraulic piston to the closed end of the pneumatic cylinder;
(c) a retaining housing disposed to carry the pneumatic cylinder which is movable in a lower portion of this housing as and when the pneumatic cylinder is advanced and retracted by the hydraulic cylinder;
(d) cooperative guide means formed on an exterior portion of the pneumatic cylinder housing and a lower interior portion of the retaining housing to maintain an alignment of the cylinder in said outer retaining housing while sliding therein;
(e) a slider wedge removably mountable and secured to a lower end of the pneumatic cylinder and movable as the pneumatic cylinder is moved by the hydraulic cylinder, the slider wedge having opposed faces formed with tapered sliding surfaces;
(f) a mounting and positioning means formed and provided on the lower end of the outer housing;
(g) a pair of feathers each having an enlarged upper end retaining means formed thereon, each feather having a finished inner face adapted to mate with and present a sliding surface to the wedge when passed therebetween with the increasing taper of the wedge urging the feathers apart, and (h) a lower retainer removably mounted on the lower end of said outer housing, this lower retainer securing the pair of feathers in the desired position and relationship to the slider wedge.

4 more elements

Apparatus for mechanically splitting rock and the like by a slider wedge which is moved between like opposed feathers the wedge and feathers inserted into predrilled holes and with the wedge moved by a hydraulic piston, the movement of said wedge by the hydraulic piston being translated into a substantially like sideways movement of the opposed feathers, said apparatus including;

(a) a housing apparatus including a hydraulic cylinder having a piston and a piston rod extending from both ends, one end of the rod extending through a lower closed end of the cylinder and providing an attaching means for a wedge and the other end of said rod extending upwardly through a closed end of the cylinder with this upwardly extending rod end having means for mounting in an engaging and securing chuck of a jack hammer and when mounted in a conventional jack hammer utilizing the vibratory force and action of said jack hammer to rapidly move the apparatus assembly independently of the hydraulic actuation of the piston;
(b) means for controlling a flow of pressurized fluid selectively to either side of the piston while returning that fluid on the other side of the piston at that instant to a recovery supply;
(c) a slider wedge removably mountable and movable with the rod end as it is moved by the piston, the wedge having opposed faces formed with tapered sliding surfaces;
(d) mounting and positioning means formed and provided on the lower closed end of the hydraulic cylinder;
(e) a pair of feathers each having an enlarged upper end retaining means formed thereon, each feather having a finished inner face adapted to mate with and present a sliding surface to the wedge when passed therebetween with the increasing taper of the wedge urging the feathers apart, and (f) a lower retainer which is adapted to carry the feathers and to postion the feathers adjacent the wedge, this retainer releasably retained to a lower barrel portion of the hydraulic cylinder by a plurality of toggle clamps.

2 more elements

Dependencies are inferred from the claim text.