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US 5,107,963 AGranted
Spring loaded guide rollers
AssigneeNorcast Corporation
InventorsDario M. Rocca, Gary B. Howey
Life of this patent
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AssigneeNorcast Corporation
InventorsDario M. Rocca, Gary B. Howey
Estimating the term…
A hoist or skip conveyance for high speed hoisting operation within a vertical mine shaft is provided with sets of modules of guide rollers which engage sectional guide beams or girders extending the length of the shafts to steady the passage of the conveyance up and down the shaft. Each modular guide roller set for the system incorporates three guide rollers mounted for ready access on the outside of the respective guide module, to facilitate repair or replacement thereof. The load absorbing components for each guide roller comprise an air bag, permitting specific pre-loading of the roller, and an elastomeric high rate bumper spring to accommodate impact loads, while providing rebound capability and associated hysteresis damping, for smooth, chatter free operation of the system. The system may be specifically set up to counter the significant torquing effect of the hoisting cable.
A guidance module for use with a cable suspended hoist conveyance, in cooperation with a shaft guide rail, comprising a support frame for attachment to the conveyance, a pair of guide rolls removably pivotally mounted on the support frame in use to receive said guide rail therebetween, each roll having a first pneumatic spring means in individual, independently adjustable loading relation with the guide roll, and a second, elastomeric spring means in individual, independently adjustable loading relation with the guide roll for at least a portion of its travel, when in use to cushion the impact of the guide roll;
A guidance module for use with a hoist conveyance in cooperation with a shaft guide rail, comprising a support frame for attachment to the conveyance, three guide rolls removably pivotally mounted on the support frame, each roll having a first pneumatic spring means in adjustable loading relation with the guide roll, and a second, elastomeric spring means in adjustable loading relation with the guide roll for at least a portion of its travel, when in use, to cushion the impact of the guide roll, said support frame having a pair of lateral frame portions pivotally secured thereto for angular lateral displacement relative thereto, being located one on each side of the frame, and each having a depending plate portion to substantially enclose a side portion of the frame.
A guidance module for use with a hoist conveyance in cooperation with a shaft guide rail, comprising a support frame for attachment to the conveyance, three guide rolls removably pivotally mounted on the support frame, each roll having a first pneumatic spring means in adjustable loading relation with the guide roll, and a second, elastomeric spring means in adjustable loading relation with the guide roll for at least a portion of its travel, when in use, to cushion the impact of the guide roll, said support frame having a cover portion thereof pivotally secured thereto, having one said guide roll removably mounted externally on one face thereof and a said pneumatic spring means and two said elastomeric spring means contacting the other face of said cover portion.
Dependencies are inferred from the claim text.