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| Number | Title | Issue Date |
| 5743679 | Hydraulic shield support frame A shield support frame is constructed from main shoes (5) on the ground, hydraulic props (6) and a main canopy (7) borne by them and a gob shield (8) borne on guide links (10). On the face side, there is a front cantilever (24) linked so as to be adjustab... | 04/28/1998 |
| 5626441 | Sliding stabilizer A sliding stabilizer is a machine for supporting the roof in the working zone of a mine. A sliding stabilizer operates in tandem with a mining roof support machine. A sliding stabilizer is capable of supporting the mine roof independently of the roof supp... | 05/06/1997 |
| 5284404 | Moving steel form system A travelling steel form system includes a three-dimentional framework mechanism with multiple faces crossing and coupling with one another. A set of form panels are fixed to the outer side of the framework mechanism on more than two faces thereof, and are... | 02/08/1994 |
| 5133626 | Mobile stope support apparatus The mobile stope support apparatus comprises a number of individual units (10) which are interconnected by hydraulic cylinders (12). Each of the units (10) has a series of upright, double-acting legs (20). The legs (20) have independent bases of rounded s... | 07/28/1992 |
| 4792261 | Mine roof supports A self-advancing mine roof support comprising a floor engaging base 11, a roof engaging canopy 12, hydraulic jacks 19a, 19b to urge the base and canopy apart, and a linkage system located towards the rear of the support. The linkage system comprises an in... | 12/20/1988 |
| 4773795 | Roof cap assembly with supporting cylinders for roof support mechanism A roof cap assembly of a roof support mechanism includes a main cap having extension bearing portions at its front end, a forward cap which is pivotally attached at its rear end to the extension bearing portions of the main cap, and two supporting cylinde... | 09/27/1988 |
| 4755083 | Adjustable cap unit An adustable cap unit for a mine support frame including a main cap, an adjustable cap connected to the main cap with a hinge-type connection, an adjusting cylinder mechanism extending within the widths of the main cap and the adjustable cap, and a guide ... | 07/05/1988 |
| 4755084 | Multi-part roof-contacting structures of mine roof supports A mine roof support has a slidable extension at the front end of an auxiliary roof cap pivoted for swinging up and down on a main cap. To prevent the extension from being extended when the angle of inclination of the auxiliary cap is too high an insulativ... | 07/05/1988 |
| 4613257 | Hydraulic control arrangement A hydraulic control arrangement comprises a first hydraulic ram, a second hydraulic ram, and a hydraulic control circuit associated with the first and second hydraulic rams. Each of the hydraulic rams has a cylinder, a piston reciprocable within the cylin... | 09/23/1986 |
| 4609308 | Roof support suitable for use in mines A roof support, suitable for use in mines, includes a roof-engageable canopy which comprises a main portion and an extension portion having a pivotal connection to the main portion. Actuator means is carried by the main portion. A wedge member, which is o... | 09/02/1986 |
| 4573828 | Roof support suitable for use in mines A roof support, suitable for use in mines, includes a floor-engaging structure, extendible and contractible prop means carried by that structure, and a roof-engageable canopy supported by the prop means. The canopy comprises a main portion and an extensio... | 03/04/1986 |
| 4548527 | Roof support suitable for use in mines A roof support suitable for use in mines comprises a main roof-supporting structure, a cantilever carried by the structure, an actuator and a link member through the intermediary of which the actuator is connected to one end portion of the cantilever for ... | 10/22/1985 |
| 4512686 | Roof support suitable for use in mines A roof support, suitable for use in mines, includes a roof-engageable canopy comprising a main portion and an extension portion pivotally-connected to the main portion. Actuator means is carried by the main portion and arranged to effect sliding movement ... | 04/23/1985 |
| 4492495 | Roof support for use in mines A mine roof support includes a roof-engageable beam which comprises a main portion and a further portion which forms an extension of the main portion. The further portion is hinged to the main portion by a pin-less knuckle joint. The further portion inclu... | 01/08/1985 |
| 4491441 | Self-advancing support and control means therefor A self-advancing support, suitable for use in mines, includes a cantilever which is extendible and retractable with respect to a main portion of the support, and a sprag which is so mounted on said cantilever as to be extendible and retractable with respe... | 01/01/1985 |
| 4480946 | Gob canopy for a mine roof support A support for the roof in longwall mining operations includes a gob canopy at the rear of a roof canopy. The gob canopy can move about a vertical pivot and a horizontal pivot by operation of a hydraulic actuator. To stabilize the support, the gob canopy m... | 11/06/1984 |
| 4465408 | Mine-roof support control mechanism A control line connects an annular space in an auxiliary hydraulic cylinder of an hydraulically-movable mine-roof support (the auxiliary cylinder being provided to advance a forward, auxiliary, roof-support canopy in the direction of the working face of a... | 08/14/1984 |
| 4449860 | Mine roof supports A mine roof support has a main roof bar which is pivotably connected to an auxiliary forwardly-extendible bar. At least one piston and cylinder unit serves to swing the auxiliary bar about the main bar to bring the auxiliary bar into a roof-contacting pos... | 05/22/1984 |
| 4447174 | Cap positioning mechanism A mine roof support unit has a mechanism for adjusting the angular position of an auxiliary cap relative to a main cap, the auxiliary cap and the main cap forming the roof cap of the mine roof support unit. The auxiliary cap is connected to the main cap b... | 05/08/1984 |
| 4440522 | Hydraulic control arrangement for a roof support unit of a mineral mining installation A roof support unit for a longwall mineral mining installation has a roof shield supported above a floor sill. A first hydraulic ram is provided for advancing the roof support unit. The roof shield is provided with a forward extension which is advanceable... | 04/03/1984 |
| 4347021 | Mine roof supports A mine roof support has a main roof bar which is pivotably connected to an auxiliary forwardly-extendible bar. A piston and cylinder unit serves to swing the auxiliary bar about the main bar to bring the auxiliary bar into a roof-contacting position align... | 08/31/1982 |
| 4272129 | Mineral mining installation A mining installation includes a mine roof support the base of which has a forward part on which is located an elevated track on which a mining machine can be supported for reciprocal movement. A conveyor is disposed beneath the cantilever track for the r... | 06/09/1981 |
| 4266892 | Hydraulic roof-support frame The roof-engaging assembly of a support frame for a mine roof comprises a main beam having a cantilever extension pivoted to the main beam by pins. In order to pivot the cantilever extension through an angle of about 180°-200° between a stowed position ... | 05/12/1981 |
| 4266891 | Support assemblies for mine workings A support assembly for a mine working has a floor-sill structure for engaging on the floor of the working and a roof-engaging member or members braced by one or more props against the roof of the working. The floor-sill structure employs one or more slida... | 05/12/1981 |
| 4217067 | Mine roof support assembly The invention relates to a mine roof support assembly for use in winning mineral material from a mineral mining working having a mineral face. The assembly comprises three roof support units positioned side-by-side along the face, and a goaf shield common... | 08/12/1980 |
| 4155675 | Hydraulic walking roof-support frame A hydraulic, walking, roof-support frame comprising a vertically-movable, pivotable control lever pivotally connected at its lower end portion to a rigid inextensible rocker arm pivotally mounted on a floor runner or skid of the frame and guided at a dist... | 05/22/1979 |
| 4155676 | Hydraulic walking roof-support frame An hydraulic walking roof-support frame for a coal mine has a roof support assembly comprising a main support and an auxiliary support pivotally connected to the main support for pivoting about a horizontal axis through an angle of 180°. The auxiliary su... | 05/22/1979 |
| 4124984 | Mine roof supports A mine roof support embodying a roof engaging cover and a forepole. The cover is composed of a leading part and a trailing part relatively adjustable with respect to one another. A base member is provided with a plurality of hydraulic rams engagable with ... | 11/14/1978 |
| 4114387 | Mine roof support A mine roof support having a roof-engageable means which includes a roof-engageable pad connected to the remainder of the means by a lever or levers. Ram means is provided which is operative in a direction at right-angles to, or substantially at right-ang... | 09/19/1978 |
| 4102140 | Self-advancing mine roof supports The invention is concerned with mine-roof supports, especially self-advancing mine-roof supports and provides a support comprising a base, a shield inclined downwardly and rearwardly towards the rear of the base and pivotally attached to said base, a roof... | 07/25/1978 |
| 4065929 | Mine roof support and method in longwall mining of thick mineral seams A bi-directional shearing machine mines a longwall face at the bottom of a thick mineral seam in a retreat operation under the protection of a row of adjacent powered roof supports each of which extends in a direction transverse to the solid face. Progres... | 01/03/1978 |
| 4050259 | Safety shield and temporary roof support A safety shield attachment for protecting the operator of mine machines has a mounting plate for attachment to the machine, a platform pivoted to the mounting plate, and a canopy supported by hydraulic jacks from the mounting plate, the platform, and the ... | 09/27/1977 |
| 4041714 | Mine roof supports The invention is concerned with a self-advancing mine roof support comprising a base, hydraulically extensible prop means mounted on said base and a roof-engaging structure, including a canopy, mounted on said prop means for application thereby to a roof ... | 08/16/1977 |
| 4037419 | Mine roof support This invention relates to a mine roof support comprising a floor engaging member, a roof engaging member, hydraulic or other variable length struts supporting the roof engaging member, a shield pivotally connected at its upper end to the roof engaging mem... | 07/26/1977 |
| 4022026 | Safety shield attachment A safety shield attachment for protecting machine operators from debris or cave-ins from above has a canopy which is pivotally supported at one end, but normally retained in a fixed position over an operator's station, and a platform pivotally supported a... | 05/10/1977 |
| 4002036 | Mine roof supports A mine roof support of the type having a canopy supported from a base structure by hydraulically extensible legs and a cantilever roof-engaging member pivotally attached to the forward end of the canopy, is provided with a selectively positionable lateral... | 01/11/1977 |
| 3932998 | Mine roof support A mine roof support for use at a mineral face comprises at least one prop, a canopy or roof-engaging structure adapted to lie against the roof of a mine working, a base member adapted to lie on a floor of said mine working, and a shield flexibly connectin... | 01/20/1976 |
