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US 11,408,285 B2Granted
Jack for installing mine stopping
AssigneeJack Kennedy Metal Products & Buildings, Inc.
InventorsWilliam R. Kennedy, John M. Kennedy
Life of this patent
Estimating the term…
Abstract
A jack for installing a mine stopping panel includes an extendible post and a press for extending the extendible post. The press can have a lever movable between an actuated position and a non-actuated position and operative to extend the post as it moves toward the actuated position and retract the post as it moves toward the non-actuated position. A yieldable biaser yields when the post is extended to extend the mine stopping panel and the mine stopping panel engages a mine surface with sufficient force to crush a stopping seal and anchor the stopping panel. The press can comprise an over-center toggle linkage.
Claims22
A jack for installing a mine stopping panel in a mine passageway, the jack comprising:
- a first stopping panel support configured to engage a first portion of the mine stopping panel to press the first portion against a first surface of the mine passageway;
- a second stopping panel support configured to engage a second portion of the mine stopping panel to move the second portion away from the first portion to press the second portion against a second surface of the mine passageway;
- an extendible post having a length and comprising a first post segment connected to the first stopping panel support and second post segment connected to the second stopping panel support, the first post segment being movable relative to the second post segment to adjust the length of the extendible post;
- and
- a press configured to move the first post segment relative to the second post segment such that the first stopping panel support moves away from the second stopping panel support to press the first portion of the mine stopping panel against the first surface of the mine passageway, the press including a lever pivotable about a lever axis relative to the extendible post to a non-actuated position and to an actuated position, the press being connected to the first and second post segments such that movement of the lever toward the actuated position moves the first post segment and the first stopping panel support relative to the second post segment and the lever axis to extend the length of the extendible post and such that movement of the lever toward the non-actuated position moves the first post segment and the first stopping panel support relative to the second post segment and the lever axis to retract the length of the extendible post, the lever including a free end portion movable between the non-actuated position and the actuated position, the free end portion of the lever arranged to move toward the second stopping panel support as the lever moves toward the actuated position to move the first stopping panel support relative to the lever axis to extend the length of the extendible post, and the free end portion of the lever arranged to move away from the second stopping panel support as the lever moves toward the non-actuated position to move the first stopping panel support relative to the lever axis to retract the length of the extendible post.
2 more elements
A system for installing mine stopping in a mine passageway, the system comprising:
- a mine stopping panel configured to be installed in the mine passageway, the mine stopping panel including a seal configured to be operably crushed when subjected to a minimum installation force;
- and
- a jack configured to install the mine stopping panel in the mine passageway, the jack including:
- a column including a first stopping panel support, a second stopping panel support, an extendible post, and a press,
- the first stopping panel support being configured to engage a first portion of the mine stopping panel to press the first portion of the mine stopping panel against a first surface of the mine passageway;
- the second stopping panel support being configured to move a second portion of the mine stopping panel away from the first portion to press the second portion of the mine stopping panel against a second surface of the mine passageway;
- the extendible post having a length and comprising a first post segment connected to the first stopping panel support and a second post segment connected to the second stopping panel support, the first post segment being movable relative to the second post segment to adjust the length of the extendible post;
- the press being connected to the first and second post segments and configured to move the first post segment relative to the second post segment such that the first stopping panel support moves away from the second stopping panel support to press the first portion of the mine stopping panel against the first surface of the mine passageway;
- the column being configured to yield in response to a compression force on the extendible post resulting from the first stopping panel support pressing the first portion of the mine stopping panel against the first surface of the mine passageway, the compression force having a magnitude that is as great as a magnitude of the minimum installation force required to operably crush the seal of the mine stopping panel, the column being configured to bias the first stopping panel support away from the second stopping panel support after yielding in response to the compression force.
6 more elements
A jack for installing a mine stopping panel in a mine passageway, the jack comprising:
- a first stopping panel support configured to engage a first portion of the mine stopping panel to press the first portion of the mine stopping panel against a first surface of the mine passageway;
- a second stopping panel support configured to press a second portion of the mine stopping panel away from the first portion to press the second portion of the mine stopping panel against a second surface of the mine passageway;
- an extendible post having a length and comprising a first post segment connected to the first stopping panel support and second post segment connected to the second stopping panel support, the first post segment being movable relative to the second post segment to adjust the length of the extendible post;
- a press comprising a connecting linkage, the connecting linkage including a first link and a second link, the first link configured to be connected to the first post segment for rotation with respect to the first post segment about a first pivot axis, the second link connected to the second post segment for rotation with respect to the second post segment about a second pivot axis, the first link being connected to the second link for rotation with respect to the second link about a connecting pivot axis, the second pivot axis being disposed between the connecting pivot axis and a free end portion of the second link, the connecting linkage being movable through a range of motion from a first configuration to a second configuration, and the press being configured to extend the length of the extendible post as the connecting linkage moves in the range of motion from the first configuration toward the second configuration;
- and
- at least one retainer connected to the first link and configured to connect the first link to the first post segment;
- wherein the first post segment has a first post segment length and a plurality of retainer receivers spaced from each other along the first post segment length, each retainer receiver configured to receive the retainer to connect the first link and the first post segment.
4 more elements
Dependencies are inferred from the claim text.