Concrete crusher
First Claim
1. A heavy duty attachment for crushing articles of frangible rubble and building materials such as concrete and for connection to the boom structure and hydraulic system of a mobile machine such as a hydraulic excavator, comprisinga jaw structure including first and second relatively swingable jaws pivotally connected to each other, each of the jaws having an inner end portion adjacent the pivotal connection and also having an outer end portion,means for mounting and connecting the jaw structure to the boom structure and hydraulic system of such a mobile machine in order to have at least one jaw and to open and close the jaws relative to each other and to grip and apply pressure onto such an article to be crushed,and said first jaw having a rigid grid made of elongate rigid grid elements, certain of said grid elements extending transversely of each other and affixed together, certain of the grid elements being widely spaced from each other to define open areas therebetween and to permit crushed material from the articles to pass through the jaw.
1 Assignment
0 Petitions
Reexamination
Accused Products
Abstract
An attachment for the boom structure and hydraulic system of a hydraulic excavator, including a pair of relatively swingable jaws for crushing concrete slabs and the like, each of the jaws having a grid like jaw structure with elongate rigid plates extending outwardly from the pivot structure, there being a multiplicity of tapered tooth like projections on the grid structure of the jaws, the tooth like projections being of various lengths, at least one of the jaws being connected to the hydraulic system to open and close the jaws to apply pressure and fracture concrete structures being gripped and crushed.
102 Citations
23 Claims
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1. A heavy duty attachment for crushing articles of frangible rubble and building materials such as concrete and for connection to the boom structure and hydraulic system of a mobile machine such as a hydraulic excavator, comprising
a jaw structure including first and second relatively swingable jaws pivotally connected to each other, each of the jaws having an inner end portion adjacent the pivotal connection and also having an outer end portion, means for mounting and connecting the jaw structure to the boom structure and hydraulic system of such a mobile machine in order to have at least one jaw and to open and close the jaws relative to each other and to grip and apply pressure onto such an article to be crushed, and said first jaw having a rigid grid made of elongate rigid grid elements, certain of said grid elements extending transversely of each other and affixed together, certain of the grid elements being widely spaced from each other to define open areas therebetween and to permit crushed material from the articles to pass through the jaw.
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7. A heavy duty attachment for crushing articles of frangible rubble and building materials such as concrete and for connection to the boom structure and hydraulic system of a mobile machine such as a hydraulic excavator, comprising
a jaw structure including first and second relatively swingable jaws pivotally connected to each other, each of the jaws having an inner end portion adjacent the pivotal connection and also having an outer end portion, means for mounting and connecting the jaw structure to the boom structure and hydraulic system of such a mobile machine in order to move at least one jaw and to open and close the jaws relative to each other and to grip and apply pressure onto such an article to be crushed, and said first jaw having a rigid grid made of elongate rigid grid elements, certain of said grid elements extending transversely of each other and affixed together, certain of the grid elements being widely spaced from each other to define open areas therebetween and to permit crushed material from the articles to pass through the jaw, said grid having a plurality of teeth on certain of the grid elements, the teeth protruding toward the second jaw.
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13. A heavy duty attachment for crushing articles of frangible rubble and building materials such as concrete and for connection to the boom structure and hydraulic system of a mobile machine such as a hydraulic excavator, comprising
a jaw structure including first and second relatively swingable jaws pivotally connected to each other, each of the jaws having an inner end portion adjacent the pivotal connection and also having an outer end portion, means for mounting and connecting the jaw structure to the boom structure and hydraulic system of such a mobile machine in order to move at least one jaw and to open and close the jaws relative to each other and to grip and apply pressure onto such an article to be crushed, each of said jaws having a rigid grid made of elongate rigid grid elements, said grids being opposite each other and in confronting relation with each other, certain of said grid elements in each grid extending transversely of each other and affixed together, and certain of the grid elements being widely spaced from each other to define open areas therebetween and to permit crushed material from the articles to pass through the jaw.
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21. A heavy duty attachment for crushing articles of frangible rubble and building materials such as concrete and for connection to the boom structure and hydraulic system of a mobile machine such as a hydraulic excavator, comprising
a jaw structure including a pair of relatively swingable jaws pivotally connected to each other, each of the jaws having an inner end portion adjacent the pivotal connection and also having an outer end portion, means for mounting and connecting the jaw structure to the boom structure and hydraulic system of such a mobile machine in order to move at least one jaw and to open and close the jaws relative to each other and to grip and apply pressure onto such an article t be crushed, and each of the jaws having an array of rigid teeth protruding toward the other jaw for engaging and penetrating the article to be crushed, certain of said teeth on each jaw being disaligned with the teeth of the jaw as the jaws are closed.
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23. A heavy duty attachment for crushing articles of frangible rubble and building materials such as concrete and for connection to the boom structure and hydraulic system of a mobile machine such as a hydraulic excavator, comprising
a jaw structure including a pair of relatively swingable jaws pivotally connected to each other, each of the jaws having an inner end portion adjacent the pivotal connection and also having an outer end portion, means for mounting and connecting the jaw structure to the boom structure and hydraulic system of such a mobile machine in order to move at least one jaw and to open and close the jaws relative to each other and to grip and apply pressure onto such an article to be crushed, each of the jaws having a rigid grid made of elongate rigid plate-shaped grid elements, certain of said grid elements extending from the inner end portion of the jaw and toward the outer end portion thereof and other of the grid elements extending transversely and being affixed to said first mentioned grid elements, there being open areas between certain of the grid elements to permit crushed material from the articles to pass through the jaws, a plurality of teeth on the grid elements and spaced from each other, the grid elements on the two jaws and the teeth on the grid elements being arranged in disalignment with respect to each other as to confront open areas between the grid elements to fracture and break the article as the jaws are closed, each of the jaws having an elongate breaking tooth at its outer end portion and protruding toward the other jaw as the jaws are closed, said breaking teeth being arranged to pass by each other into overlapping relation and one of said breaking piece being insertable into an open area between the open elements of the opposite jaw.
Specification