U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Truss systems, components and methods for trussing arched mine roofs

Patent 4960348 Issued on October 2, 1990. Estimated Expiration Date: Icon_subject December 8, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

1686910

3427811

3505824

Systemic roof support
Patent #: 4349300
Issued on: 09/14/1982
Inventor: Kelley

Transition plate for a mine roof truss
Patent #: 4395161
Issued on: 07/26/1983
Inventor: Wilson ,   et al.

Mine roof support system
Patent #: 4498816
Issued on: 02/12/1985
Inventor: Korpela ,   et al.

Mine roof supporting truss system
Patent #: 4596496
Issued on: 06/24/1986
Inventor: Tyrell ,   et al.

Roof support system for a mine and method for providing the same
Patent #: 4630974
Issued on: 12/23/1986
Inventor: Sherman

Method and apparatus for reinforcing and consolidating earth structures
Patent #: 4632605
Issued on: 12/30/1986
Inventor: Tucker

Truss systems and components thereof
Patent #: 4666344
Issued on: 05/19/1987
Inventor: Seegmiller

More ...

Inventor

Application

No. 281467 filed on 12/08/1988

US Classes:

405/259.1, Rock or earth bolt or anchor405/288Roof support

Examiners

Primary: Corbin, David H.

Attorney, Agent or Firm

Foreign Patent References

  • 1072893 GB. 06/20/1967

International Class

E21D 020/00

Abstract

A truss structure, components, and method for trussing arched roofs in mines and the like. The truss structure includes, in addition to specially designed brackets and tensioned elongate connectors, one or more medially positioned upstanding post brackets for upwardly abuting against central portions of an arched mine roof. The method and concept includes, in a preferred form, applying obtuse-angle-oriented elongate connectors such as tie rods, secured to a lower portion of a post bracket concerned such that, when said elongate connectors are tensioned, an upward thrust is applied to said post brackets, whereby to produce an increased compression zone in the roof rock above the arched roof. Like-constructed interlocking roof truss structures are also provided for both longitudinally and also tranversely trussing an arched mine roof.

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