Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
279 words
An anchor bolting assembly for mounting within a borehole of a rock structure, said rock structure having an outer face portion disposed around said borehole, said assembly comprising: a frangible capsule for insertion into said borehole, said capsule containing a flowable anchoring resin; a threaded bolt member for insertion into said borehole, said bolt member having an inner end for rupturing the frangible capsule and mixing the resin contained therein, and a free end; a bearing plate member for mounting on the free end of said bolt member and for engaging the outer face of said rock structure; and a nut member having an inner end portion for abutting against said bearing plate member, an opposed outer end portion, and an interiorly threaded through aperture for receiving the free end of said bolt member, said nut member including frangible protrusion members disposed on said nut aperture threads for engaging the free end of said bolt member so as to temporarily resist the threading of the nut member onto the free end of said bolt such that while said anchoring resin is flowable, rotation of said nut member effects the simultaneous rotation of said bolt member and the mixing of the resin within the borehole, and such that when said resin has solidified around the inner end of the member, non-rotatably fixing it within the borehole, continued rotation of the nut member provides sufficient torque to break said frangible protrusion members and permit the nut member to be completely threaded onto the free end of said bolt member, thus tightening the bearing plate member against the outer face of the rock structure and tensioning the bolt member within the borehole.
Claim 2
Dependent Claim
279 words
An anchor bolting assembly for mounting within a borehole of a rock structure, said rock structure having an outer face portion disposed around said borehole, said assembly comprising: a frangible capsule for insertion into said borehole, said capsule containing a flowable anchoring resin; a threaded bolt member for insertion into said borehole, said bolt member having an inner end for rupturing the frangible capsule and mixing the resin contained therein, and a free end; a bearing plate member for mounting on the free end of said bolt member and for engaging the outer face of said rock structure; and a nut member having an inner end portion for abutting against said bearing plate member, an opposed outer end portion, and an interiorly threaded through aperture for receiving the free end of said bolt member, said nut member including frangible protrusion members disposed on said nut aperture threads for engaging the free end of said bolt member so as to temporarily resist the threading of the nut member onto the free end of said bolt such that while said anchoring resin is flowable, rotation of said nut member effects the simultaneous rotation of said bolt member and the mixing of the resin within the borehole, and such that when said resin has solidified around the inner end of the member, non-rotatably fixing it within the borehole, continued rotation of the nut member provides sufficient torque to break said frangible protrusion members and permit the nut member to be completely threaded onto the free end of said bolt member, thus tightening the bearing plate member against the outer face of the rock structure and tensioning the bolt member within the borehole.
Claim 3
Dependent Claim
302 words
An assembly as in claim 1 wherein said frangible protrusion members comprise plastic dots formed on said nut aperture threads. 3. An anchor bolting assembly for mounting within a borehole of a rock structure, said rock structure having an outer face portion disposed around said borehole said assembly comprising: a frangible capsule for insertion into said borehole, said capsule containing a flowable anchoring resin; a threaded bolt member for insertion into said borehole, said bolt member having an inner end for rupturing the frangible capsule and mixing the resin contained therein, and a free end; a bearing plate member for mounting on the free end of said bolt member and for engaging the outer face of said rock structure; and a nut member having an inner end portion for abutting against said bearing plate member, an opposed outer end portion, and an interiorly threaded through aperture for receiving the free end of said bolt member, said nut member including a frangible film member disposed over the nut aperture at the outer end portion of the nut for engaging the free end of said bolt member, so as to temporarily resist the complete threading of the nut member onto the free end of said bolt such that while said anchoring resin is flowable, rotation of said nut member effects the simultaneous rotation of said bolt member and the mixing of the resin within the borehole, said film member being frangible such that when said resin has solidified around the inner end of the member, non-rotatably fixing it within the borehole, continued rotation of the nut member provides sufficient torque to enable the free end of the bolt member to pierce said film member and permit the nut member to be completely threaded onto the free end of said bolt member, thus tightening the
Claim 4
Dependent Claim
22 words
Claim 3 continued: bearing plate member against the outer face of the rock structure and tensioning the bolt member within the borehole.