Tool for earthworking machine

Claim 2

An earthworking tool comprising; an arm, said arm having a shank portion, said shank portion adapted to be supported on a rotary member having an axis of rotation, one end of said shank portion of the arm extending generally radially outwardly from the member, said one end of said shank portion joining a working end portion of said arm extending laterally to one side of said shank portion in a direction substantially parallel to said axis of rotation so as to provide said arm with an L-shaped configuration when viewed along a line perpendicular to said axis of rotation, said shank portion and said working end portion having a forwardly facing side and a trailing side with respect to a given direction of rotation of said arm, abrasion protective means mounted on said working end of said arm and disposed in linerly extending relation to said forwardly facing side thereof and to a portion of said forward face of the radial portion of said shank portion.

Claim 3

An earthworking tool according to claim 1 in which said forwardly facing side of said working end portion of said arm is inclined at an angle of about 10 degrees to a plane containing the axis of rotation of said arm.

Claim 4

An earthworking tool comprising; an arm, said arm having a shank portion, said shank portion adapted to be supported on a rotary member having an axis of rotation, one end of said shank portion of the arm extending generally radially outwardly from the member, said one end of said shank portion joining a working end portion of said arm extending laterally to one side of said shank portion in a direction substantially parallel to said axis of rotation so as to provide said arm with an L-shaped configuration when viewed along a line perpendicular to said axis of rotation, said shank portion and said working end portion having a forwardly facing side and a trailing side with respect to a given direction of rotation of said arm, means mounted on said working end of said arm end disposed in abrasion protective relation to said forwardly facing side thereof and a portion of said forward face of said shank portion, said means comprises a block mounted on said working end portion of said arm, said block having a forward side, at least one element of hard wear resistant material carried on said forward side of said block, and wherein said working end of said arm is wider in one direction than in the other direction.

Claim 5

An earthworking tool comprising; an arm, said arm having a shank portion, said shank portion adapted to be supported on a rotary member having an axis of rotation, one end of said shank portion of the arm extending generally radially outwardly from the member, said one end of said shank portion joining a working end portion of said arm extending laterally to one side of said shank portion in a direction substantially parallel to said axis of rotation so as to provide said arm with an L-shaped configuration when viewed along a line perpendicular to said axis of rotation, said shank portion and said working end portion having a forwardly facing side and a trailing side with respect to a given direction of rotation of said arm, means mounted on said working end of said arm end disposed in abrasion protective relation to said forwardly facing side thereof and a portion of said forward face of said shank portion, said means comprises a block mounted on said working end portion of said arm, said block having a forward side, at least one element of hard wear resistant material carried on said forward side of said block, and wherein said working end of said arm is wider in one direction than in the other direction.

Claim 6

An earthworking tool according to claim 3 in which said forward side of said block has a sharp edge.

Claim 7

An earthworking tool according to claim 3 which includes a plurality of said hard wear resistant elements and including at least one element presenting an edge extending in the forward direction and at least one element presenting a point extending in the forward direction.

Claim 8

An earthworking tool according to claim 5 in which said elements with points thereon protrude forwardly beyond the others of said elements.

Claim 9

An earthworking tool according to claim 3 which includes a plurality of said hard wear resistant elements, said forward side of said block being inclined relative to the direction of movement thereof.

Claim 10

An earthworking tool according to claim 7 in which the angle of inclination of the forward side of said block is about 10 degrees to the axis about which said arm rotates.

Claim 11

An earthworking tool according to claim 3 in which said block is welded to said working end portion of said arm.

Claim 12

An earthworking tool according to claim 3 further comprising said working end portion having a socket in said forwardly facing side, and said block having a tongue element receivable in said socket.

Claim 13

An earthworking tool according to claim 10 in which said block has rearwardly facing shoulder means engageable with said working end portion of said arm to sustain working loads imposed on said block.

Claim 14

An earthworking tool comprising; an arm, said arm having a shank portion, said shank portion adapted to be supported on a rotary member having an axis of rotation, one end of said shank portion of the arm extending generally radially outwardly from the member, said one end of said shank portion joining a working end portion of said arm extending laterally to one side of said shank portion in a direction substantially parallel to said axis of rotation so as to provide said arm with an L-shaped configuration when viewed along a line perpendicular to said axis of rotation, said shank portion and said working end portion having a forwardly facing side and a trailing side with respect to a given direction of rotation of said arm, means mounted on said working end of said arm and disposed in abrasion protective relation to said forwardly facing side thereof and a portion of said forward face of said shank portion, said means having a forwardly facing side having a foremost impact region and an adjoining cutting edge inclining laterally outwardly from said impact region and rearwardly with respect to the direction of rotation of said impact region, said means comprising surfaces of hard wear resistant material that are inclined rearwardly with respect to said cutting edge, said working end portion of said arm having a certain thickness when viewed in front view, said means extending substantially across and in front of the thickness of said working end portion, and wherein said forwardly facing side of said one end of said shank portion having a notch at the juncture of said one end portion with said working end portion.

Claim 15

An earthworking tool comprising; an arm, said arm having a shank portion, said shank portion adapted to be supported on a rotary member having an axis of rotation, one end of said shank portion of the arm extending generally radially outwardly from the member, said one end of said shank portion joining a working end portion of said arm extending laterally to one side of said shank portion in a direction substantially parallel to said axis of rotation so as to provide said arm with an L-shaped configuration when viewed along a line perpendicular to said axis of rotation, said shank portion and said working end portion having a forwardly facing side and a trailing side with respect to a given direction of rotation of said arm, means mounted on said working end of said arm and disposed in abrasion protective relation to said forwardly facing side thereof and a portion of said forward face of said shank portion, said means having a forwardly facing side having a foremost impact region and an adjoining cutting edge inclining laterally outwardly from said impact region and rearwardly with respect to the direction of rotation of said impact region, said means comprising surfaces of hard wear resistant material that are inclined rearwardly with respect to said cutting edge, said working end portion of said arm having a certain thickness when viewed in front view, said means extending substantially across and in front of the thickness of said working end portion, and wherein said forwardly facing side of said one end of said shank portion having a notch at the juncture of said one end portion with said working end portion.

Claim 16

An earthworking tool comprising; an arm, said arm having a shank portion, said shank portion adapted to be supported on a rotary member having an axis of rotation, one end of said shank portion of the arm extending generally radially outwardly from the member, said one end of said shank portion joining a working end portion of said arm extending laterally to one side of said shank portion in a direction substantially parallel to said axis of rotation so as to provide said arm with an L-shaped configuration when viewed along a line perpendicular to said axis of rotation, said shank portion and said working end portion having a forwardly facing side and a trailing side with respect to a given direction of rotation of said arm, means mounted on said working end of said arm and disposed in abrasion protective relation to said forwardly facing side thereof and a portion of said forward face of said shank portion, said means having a forwardly facing side having a foremost impact region and an adjoining cutting edge inclined laterally outwardly from said impact region and rearwardly with respect to the direction of rotation of said impact region, said working end portion of said arm having a certain thickness when viewed in front view, said abrasion protection means extending substantially across and in front of the thickness of said working end portion, and said one end portion of said arm having a notch in said forward face at the juncture of said one end portion with said working end portion.

Claim 17

An earthworking tool comprising; an arm, said arm having a shank portion, said shank portion adapted to be supported on a rotary member having an axis of rotation, one end of said shank portion of the arm extending generally radially outwardly from the member, said one end of said shank portion joining a working end portion of said arm extending laterally to one side of said shank portion in a direction substantially parallel to said axis of rotation so as to provide said arm with an L-shaped configuration when viewed along a line perpendicular to said axis of rotation, said shank portion and said working end portion having a forwardly facing side and a trailing side with respect to a given direction of rotation of said arm, means mounted on said working end of said arm and disposed in abrasion protective relation to said forwardly facing side thereof and a portion of said forward face of said shank portion, said means having a forwardly facing side having a foremost impact region and an adjoining cutting edge inclined laterally outwardly from said impact region and rearwardly with respect to the direction of rotation of said impact region, said working end portion of said arm having a certain thickness when viewed in front view, said abrasion protection means extending substantially across and in front of the thickness of said working end portion, and said one end portion of said arm having a notch in said forward face at the juncture of said one end portion with said working end portion.

Claim 18

An earthworking tool comprising; an arm, said arm having a shank portion, said shank portion adapted to be supported on a rotary member having an axis of rotation, one end of said shank portion of the arm extending generally radially outwardly from the member, said one end of said shank portion joining a working end portion of said arm extending laterally to one side of said shank portion in a direction substantially parallel to said axis of rotation so as to provide said arm with an L-shaped configuration when viewed along a line perpendicular to said axis of rotation, said shank portion and said working end portion having a forwardly facing side and a trailing side with respect to a given direction of rotation of said arm, means mounted on said working end of said arm and disposed in abrasion protective relation to said forwardly facing side thereof and a portion of said forward face of said shank portion, said portion of said forward face of said shank portion comprising a notch located at the juncture of said shank portion with said working end portion.

Claim 19

An earthworking tool comprising; an arm, said arm having a shank portion, said shank portion adapted to be supported on a rotary member having an axis of rotation, one end of said shank portion of the arm extending generally radially outwardly from the member, said one end of said shank portion joining a working end portion of said arm extending laterally to one side of said shank portion in a direction substantially parallel to said axis of rotation so as to provide said arm with an L-shaped configuration when viewed along a line perpendicular to said axis of rotation, said shank portion and said working end portion having a forwardly facing side and a trailing side with respect to a given direction of rotation of said arm, means mounted on said working end of said arm and disposed in abrasion protective relation to said forwardly facing side thereof and a portion of said forward face of said shank portion, said portion of said forward face of said shank portion comprising a notch located at the juncture of said shank portion with said working end portion.

Claim 20

An earthworking tool according to claim 14 wherein said means having a forwardly facing side having a foremost impact region and an adjoining cutting edge inclining laterally outwardly from said impact region and rearwardly with respect to the direction of rotation of said impact region.

Claim 21

An earthworking tool according to claim 14 in which said means comprises surfaces of hard wear resistant material that are inclined rearwardly with respect to said cutting edge.

Claim 22

An earthworking tool according to claim 14 in which said working end portion of said arm has a certain thickness when viewed in front view, said abrasion protection means extending substantially across and in front of the thickness of said working end portion.