Pavement planing machine

A pavement planing machine for removable attachment to a self-propelling vehicle such as a front end loader, said vehicle having a pair of lift arms. each outwardly adjacent to one of a pair of opposite sides of the vehicle, said arms being swingable up and down in unison about a laterally extending arm axis near a rear end of the vehicle and projecting forward from that axis to have front ends in front of a front end of the vehicle, attachment means on the front ends of said arms providing for removable attchment of a bucket to said arms and for swinging of the bucket relative to said arms about a bucket axis that is near their front ends and is parallel to said arm axis, and pressure fluid energizable arm actuating means connected with a pressure fluid source on the vehicle for controlledly raising and lowering said arms, said pavement planing machine comprising:

• A. a housing that is substantially open at its bottom, said housing having
• (1) a top wall,
• (2) a pair of opposite upright side walls spaced apart by a distance substantially smaller than the distance between said arms,
• (3) a laterally extending front member rigidly connected with said side walls at front ends of them, and
• (4) a plate-like edgewise upright and laterally extending rear wall
• (a) rigidly secured to said side walls at rear ends of them and
• (b) having at least one marginal portion which projects edgewise outwardly beyond one of the other of said walls;
• B. mounting means on each of said side walls for removably supporting a digging instrumentality that is rotatable in the housing, said mounting means defining a rotation axis substantially normal to said side walls about which said instrumentality is rotatable and whic is fixed in relation to said housing to partake of all motion thereof;
• C. an upright frame member removably securable to said attachment means to replace said bucket and to be swingable about said bucket axis, said frame member having laterally opposite ends and having a width between those ends to extend laterally across the entire distance between said arms;
• D. a carrier confined between said frame member and said rear wall;
• E. cooperating guide means on said frame member and on said carrier confining the latter to lateral motion relative to the frame member between an off-center position near one of said ends of the frame member and a central position intermediate said ends of the frame member;
• F. cooperating pivot means on said carrier and on said rear wall of the housing confining the housing to tilting adjustment relative to the carrier about a fore-and-aft extending tilting axis which is at a level below said rotation axis and is adjacent to the side wall of the housing that is remote from said one end of the frame member;
• G. cooperating releasable clamping means on said carrier and on said marginal portion of the rear wall for releasably confining the housing against tilting relative to the carrier and thus maintaining the rotation axis in a selected position of inclination to the horizontal;
• and
• H. pressure fluid actuated expansible and retractable jack means
• (1) connectable with said pressure fluid source,
• (2) having at one end thereof a connection with said frame member that is near the other of its said ends and near the level of said pivot connection and
• (3) having at an opposite end thereof a connection with said housing that is at a level substantially above said rotation axis and is adjacent to said side wall that is remote from said one end of the frame member,
• so that said jack means can effect lateral shifting of the carrier relative to the frame member and can control tilting of the housing relative to the carrier.