Compressible support column
AssigneeAmerican Commercial, Incorporated
InventorsJames E. Marianski, Andrew J. Marianski
Life of this patent
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Abstract
A compressible support used to support mine roofs. The compressible support generally includes a male member which adjustably engages a collar and may further include a cap and a wooden base. A post may also be provided. The male member defines ridges and grooves and the collar defines corrugations, each preferably in the form of modified buttress threads, which yield, fracture, or strip when the compressible support is subjected to additional force, decreasing the overall length of the compressible support.
Claims15
A compressible support including:
- a male member defining a plurality of modified buttress threads;
- a collar which has an internal surface defining a plurality of corrugations that adjustably engage the modified buttress threads defined by the male member;
- and
- a post attached to the collar,
- wherein the modified buttress threads defined by the male member and the corrugations defined by the collar are specifically and intentionally designed to yield when the male member and collar are compressed together.
A method of using a compressible support which includes a male member which defines a plurality of ridges and grooves and a collar which defines an internal surface and a plurality of corrugations, the corrugations adjustably engaging grooves defined by the male member, comprising the steps of:
- a. inserting a compressible support between two objects spaced away from one another;
- b. adjusting the compressible support so the compressible support has a support length and fits between the two objects;
- c. compressing the compressible support between the two objects;
- d. allowing the ridges defined by the male member and the corrugations defined by the support to yield;
- and
- e. reducing the compressible support to a length less than the support length.
A compressible support comprising:
- a male member defining a plurality of modified buttress threads having a modified buttress angle of approximately fifteen to thirty degrees;
- and
- a collar defining a plurality of modified buttress threads having a modified buttress angle of approximately fifteen to twenty degrees,
- wherein the modified buttress threads defined by the male member and the modified buttress threads defined by the collar are specifically and intentionally designed to yield when the male member and collar are compressed together and the modified buttress threads defined by the male member are made from a material softer than the material used to make the modified buttress threads defined by the collar.
Dependencies are inferred from the claim text.