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US 5,509,477 AGranted
Borehole ventilation sealcover
AssigneeVictor Marcinkowski
InventorDino Ryan
Life of this patent
Estimating the term…
Abstract
A simple bore hole plug for either temporarily or permanently sealing mine bore holes and ventilating shafts or the like is described. A plurality of used motor vehicle tires are arranged one upon the other coaxially in increasing order of diameter. Steel plates are placed at the top and bottom of the tire pile and maintained in spaced relation by means of a metal separator pipe. A steel rod having a lifting eye at one end and a threaded portion at the other end, is passed axially through the pipe and a nut is tightened on the threaded portion to draw the tires tightly together.
Claims7
A bore hole cover comprising:
- a plurality of hollow ring members of selected diameters having substantially parallel opposed sides arranged in overlying planar coaxial relationship in order of increasing diameter;
- a pair of substantially rigid disc members arranged in planar spaced coaxial relationship on respective opposite sides of said coaxially arranged ring members;
- a tubular spacer member mounted coaxially between said disc members;
- and
- rod means coaxially arranged in said tubular spacer member.
2 more elements
Dependencies are inferred from the claim text.