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US 5,413,436 AGranted
Support column
AssigneeMBK-Hydraulik Meuwsen & Brockhausen GmbH
InventorVolker Merz
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AssigneeMBK-Hydraulik Meuwsen & Brockhausen GmbH
InventorVolker Merz
Estimating the term…
A support column for underground mining has a hollow lower column component and a hollow upper column component. The upper column component is slidingly mounted in the lower column component. The bottom of the upper column component is a plate member. The circumferential outer surface of the plate member and the inner surface of the lower column component form an annular gap through which air and water can penetrate, while a non-hardening filler introduced into the interior space of the lower column component through a filling unit cannot penetrate through the gap. The filler accumulating in the interior space of the lower column component causes the upper column component to be moved relative to the lower column component and the support column is clamped between the abutments. The support column can be removed by discharging filler through an outlet opening in the lower column component.
A support column for underground mining to be clamped between an upper abutment and a lower abutment, the support column comprising an upper hollow column component and a lower hollow column component, the upper column component being telescopingly mounted in the lower column component, the upper and lower column components each having an interior space, means for completely closing off the interior space of the upper column component relative to the interior space of the lower column component, the lower column component comprising a filling unit for filling a non-hardening filler mixed with an auxiliary agent into the lower column component, an annular gap being defined between an outer surface of the upper column component and an inner surface of the lower column component, the gap having a width, the width being selected such that the auxiliary agent and air can pass through the gap and filler is prevented from passing through the gap, whereby filler accumulating in the interior space of the lower column component causes the upper column component to slide relative to the lower column component in an outward direction and finally clamps the support column between the upper and lower abutments.
A method of clamping a support column for underground mining between an upper and a lower abutment, the support column including an upper hollow column component and a lower hollow column component, the upper column component being telescopingly mounted in the lower column component, the upper and lower column components each having an interior space, means for completely closing off the interior space of the upper column component relative to the interior space of the lower column component, the lower column component comprising a filling unit for filling a non-hardening filler mixed with an auxiliary agent into the lower column component, an annular gap being defined between an outer surface of the upper column component and an inner surface of the lower column component, the gap having a width, the width being selected that the auxiliary agent and air can pass through the gap and filler is prevented from passing through the gap, whereby the method comprising filling thee filler mixed with the auxiliary agent into the interior space of the lower column component so that the filler accumulates in the interior space of the lower column component and the auxiliary agent and air escape through the annular gap until the filler presses the upper and lower column components against the abutments.
Dependencies are inferred from the claim text.