Mineral Winning Pick, Pick Holder, And Combination
AssigneeESCO Corporation
InventorsRoberto de Jesus Torres Delgado, William Stephen Clapham
Life of this patent
Estimating the term…
Abstract
An improved pick and pick holder assembly for use in mineral winning and the like. The improved pick and pick holder increases the effective life of a tool and pick holder by minimizing the shifting of the pick within the pick holder. The movement of the pick is minimized by front and rear bearing surfaces that remain positively engaged with front and rear bearing surfaces of the pick holder for loads applied to the pick that are predominantly inward and predominantly rearward.
Claims91
A pick for attachment to an excavating machine for working a material to be excavated, the pick comprising:
- a head configured to impinge on the material to be excavated with speed and force to fracture and separate the material;
- and
- a shank to be releasably retained in a pick holder mounted on the excavating machine, the shank having bearing surfaces to bear against bearing surfaces on the pick holder, wherein the bearing surfaces on the shank and the bearing surfaces on the holder tend to bear against one another when the forces on the head are between inward and rearward.
A pick for attachment to an excavating machine for working a material to be excavated, the pick comprising:
- a head configured to impact and separate the material to be excavated;
- and
- a shank to be releasably retained in a pick holder mounted on the excavating machine, the shank having a front end and a rear end opposite the front end, at least one of the front end and the rear end includes a pair of bearing surfaces to bear against complementary surfaces on the pick holder, wherein the said bearing surfaces are generally planer and diverge laterally away from each other.
A pick for attachment to an excavating machine for working a material to be excavated, the pick comprising:
- a head configured to impact and separate the material to be excavated;
- and
- a shank to be releasably retained in a pick holder mounted on the excavating machine, the shank including a narrow front corner surface at a juncture of the head and the shank, wherein the narrow front corner surface causes the head to be broken from the shank when subjected to fracture forces.
A pick for attachment to an excavating machine for working a material to be excavated, the pick comprising:
- a head configured to impact and separate the material to be excavated, the head having a blade and a shoulder;
- a shank to be releasably retained in a pick holder mounted on the excavating machine;
- and
- a point of high stress located below the shoulder designed to break the shoulder from the shank when subjected to fracture forces, wherein the juncture of the head and the shank is free of any notches of cut out material.
A pick for attachment to an excavating machine for working a material to be excavated, the pick comprising:
- a head configured to impact and separate the material to be excavated, the head including a blade and a shoulder below the blade, the shoulder extending farther forward than the blade, and the shoulder primarily resisting inwardly directed forces by bearing against a pick holder mounted on the excavating machine;
- and
- a shank to be releasably retained in the pick holder.
A pick for attachment to an excavating machine for working a material to be excavated, the pick comprising:
- a head configured to impact and separate the material to be excavated;
- and
- a shank to be releasably retained in the pick holder, the shank including a rear bearing surface and a front hook, the front hook having a generally planer surface to bear against a complementary recess in the pick holder, the generally planer surface is rearwardly inclined to a plane perpendicular to the rear bearing surface.
A pick for attachment to an excavating machine comprising a head having a distal end to strike a surface to be excavated and a shank to be received into a holder secured to the excavating machine, the shank being oriented such that a line running along a true inwardly-directed load applied to the distal end will intersect the shank.
A pick for attachment to an excavating machine comprising a shank to be received into a holder secured to the excavating machine, and a head having a distal end to strike a surface to be excavated and a forwardly extending shoulder with an underside bearing surface to bear against the holder, wherein at least a substantial portion of the underside bearing surface extends forward of a line running along a true inwardly-directed load applied to the distal end.
A pick for attachment to an excavating machine comprising a head having a distal end to strike a surface to be excavated and a shank to be received into a holder secured to the excavating machine, the shank including a front side and a rear side, each of the front and rear sides including at least one bearing surface to bear against the holder and at least one recessed surface to provide clearance between the shank and the holder.
A tool holder for attachment to an excavating machine for working a material to be excavated, the tool holder having a mounting end to be secured to the excavating machine and an opening for holding a pick to impact the material to be excavated, wherein the opening is rearwardly inclined relative to a true inwardly-directed load applied to a distal end of the pick.
A pick assembly for attachment to an excavating machine for working a material to be excavated, the pick assembly comprising:
- a pick holder secured to the excavating machine, the pick holder having an opening with internal bearing surfaces;
- a pick comprising a head configured to impact and separate the material to be excavated, and a shank to be releasably retained in the opening in the pick holder, the shank having a front end and a rear end opposite the front end, at least one of the front end and the rear end includes a pair of bearing surfaces that mirror and compliment the internal bearing surfaces on the pick holder, the pair of bearing surfaces bear against the internal bearing surfaces of the pick holder;
- and
- a securement mechanism to hold the pick within the pick holder wherein the said bearing surfaces of the pick and the said internal bearing surfaces in the pick holder diverge laterally away from each other.
A pick assembly for attachment to an excavating machine for working a material to be excavated, the pick assembly comprising:
- a pick holder secured to the excavating machine, the pick holder having an opening with internal bearing surfaces;
- a pick comprising a head configured to impinge on the material to be excavated with speed and force to fracture and separate the material, and a shank to be releasably retained in the opening in the pick holder, the shank and the head being in the same plane, the shank having bearing surfaces to bear against the internal bearing surfaces of the pick holder, wherein the shank is rearwardly inclined relative to the forces that are inward on the head;
- and
- a securement mechanism to hold the pick within the pick holder.
A pick assembly for attachment to an excavating machine for working a material to be excavated, the pick assembly comprising:
- a pick holder secured to the excavating machine, the pick holder having an opening;
- a pick comprising a head configured to impact and separate the material to be excavated, and a shank to be releasably retained in the opening in the pick holder, the shank including a narrow front corner surface at a juncture of the head and the shank, wherein the narrow front corner surface causes the head to be broken from the shank when subjected to fracture forces;
- and
- a securement mechanism to hold the pick within the pick holder.
A pick assembly for attachment to an excavating machine for working a material to be excavated, the pick assembly comprising:
- a pick holder secured to the excavating machine, the pick holder having an opening;
- a pick comprising a head configured to impact and separate the material to be excavated and a shoulder below the blade and a shank to be releasably retained in the opening in the pick holder, wherein the head has a blade and a shoulder extending below the blade, and the pick has a point of high stress located below the shoulder designed to break the shoulder from the shank when subjected to fracture forces, wherein the juncture of the head and the shank is free of any notches of cut out material;
- and
- a securement mechanism to hold the pick within the pick holder.
A pick assembly for attachment to an excavating machine for working a material to be excavated, the pick assembly comprising:
- a pick holder secured to the excavating machine, the pick holder having an opening;
- a pick comprising a shank to be releasably retained in the opening in the pick holder and a head configured to impact and separate the material to be excavated, wherein the head has a blade and a shoulder extending below the blade and the shoulder extends farther forward than the blade;
- and
- a securement mechanism to hold the pick within the pick holder.
A pick assembly for attachment to an excavating machine for working a material to be excavated, the pick assembly comprising:
- a pick holder secured to the excavating machine, the pick holder having an opening with an internal recess and internal bearing surfaces;
- a pick comprising a head configured to impact and separate the material to be excavated and a shank to be releasably retained in the pick holder, the shank including a rear bearing surface and a front hook, the front hook having a generally planer surface to bear against the complementary recess in the pick holder, the generally planer surface is rearwardly inclined to a plane perpendicular to the rear bearing surface;
- and
- a securement mechanism to hold the pick within the pick holder.
A pick assembly for attachment to an excavating machine for working a material to be excavated, the pick assembly comprising:
- a pick holder secured to the excavating machine, the pick holder having an opening;
- a pick comprising a head having a distal end to strike a surface to be excavated and a shank to be received into the opening in the pick holder, the shank and opening being oriented such that a line running along a true inwardly-directed load applied to the distal end will intersect the shank and the opening;
- and
- a securement mechanism to hold the pick within the pick holder.
A pick assembly for attachment to an excavating machine for working a material to be excavated, the pick assembly comprising:
- a pick holder secured to the excavating machine, the pick holder having an opening and an upper bearing surface;
- a pick comprising a shank to be received into the opening in the pick holder, and a head having a distal end to strike a surface to be excavated and a forwardly extending shoulder to bear against the upper bearing surface of the pick holder, wherein at least a substantial portion of the shoulder extends forward of a line running along a true inwardly-directed load applied to the distal end;
- and
- a securement mechanism to hold the pick within the pick holder.
A pick assembly for attachment to an excavating machine for working a material to be excavated, the pick assembly comprising:
- a pick holder secured to the excavating machine, the pick holder having an opening and internal bearing surfaces;
- a pick comprising a head having a distal end to strike a surface to be excavated and a shank to be received into the opening in the pick holder, the shank including a front side and a rear side, each of the front and rear sides including at least one bearing surface to bear against the internal bearing surfaces of the pick holder and at least one recessed surface to provide clearance between the shank and the holder;
- and
- a securement mechanism to hold the pick within the pick holder.
A drum for use with an excavating machine for working a material to be excavated, the drum comprising:
- a plurality of pick holders secured to the excavating machine, each said pick holder having an opening with internal bearing surfaces;
- a plurality of picks, each said pick comprising a head configured to impinge on the material to be excavated with speed and force to fracture and separate the material, and a shank to be releasably retained in one of the openings in the pick holders, the shank and the head being in the same plane, each said shank having bearing surfaces to bear against the internal bearing surfaces in each said the pick holder, wherein the shank is rearwardly inclined relative to the forces that are inward on the head;
- and
- a securement mechanism to hold the pick within the pick holder.
A pick for attachment to an excavating machine comprising a head having a distal end to strike a surface to be excavated and a shank to be received into a holder secured to the excavating machine, the head including at least one recess on at least one side to be engaged with a tool to aid in installing and removing the tool.
Dependencies are inferred from the claim text.