Did You Know...
...that a workman who left the soap mixing machine on too long was responsible for making Ivory Soap? He was so embarrassed by his mistake that he threw the mess in a stream. Imagine his dismay when the evidence of his error floated to the surface! Result: Ivory soap, the soap that floats.
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| Number | Title | Issue Date |
| 7476058 | Mining roof support frame with base skids lifting device The disclosure concerns a mining roof support frame including at least one hydraulic lifting ram which is mounted on a bridging member connecting two base skids of the main frame, and which by way of a pressure-generated force can be extended downward against a walk... | 01/13/2009 |
| 7331735 | Apparatus, system, and method for supporting a gate entry for underground full extraction mining An apparatus, system, and method are disclosed for supporting a gate entry or a connecting entry. The apparatus includes a support member, a controller, and a vehicle. The support member is configured to selectively engage a mine roof and a mine floor within a gate ... | 02/19/2008 |
| 7201541 | Prop head bearing A prop head bearing between the roof bar and the prop (4) of a shield-type support frame, comprising a ball-joint socket (3) on the roof bar and open towards the prop for receiving a ball-joint head (2) on the prop (4), with at least one ... | 04/10/2007 |
| 7177709 | Controller for underground mining A controller is disclosed for control operations in underground mining, especially for controllers to control support shields. The controller utilizes a central unit with a microprocessor and assigned, programmable memory devices for the storage and processing of so... | 02/13/2007 |
| 6523491 | Lift boat An improved lift boat includes a hull, a plurality of legs (preferably three), a plurality of pads, one pad attached to each leg, and a jacking mechanism for moving each upward and downward. Recesses in the hull receive the pads when the lift boat is unde... | 02/25/2003 |
| 6481933 | Powered support frame for large seam thicknesses with controlled gap sealing plates It is provide in a powered support frame, for large seam thicknesses with controlled gap sealing, that double acting gap cylinders (16, 27, 30) of several gap sealing elements (15) on a powered support frame are connected to a common pressure feed line (3... | 11/19/2002 |
| 5769504 | Equipment for shortwall mining useful for extraction of pillars in underground coal mines Shortwall mining equipment for extraction of some pillars in an underground coal mine has a series of self-advancing powered roof supports (1) for placement along the pillars (2) under extraction, the pillars under extraction being located within a panel ... | 06/23/1998 |
| 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 |
| 5401123 | Control device for mine-roof support The control device is adapted to be inserted between the control valves of a pilot device and the pressure-medium consumers (hydraulic prop and hydraulic working cylinder) in an hydraulic self-advancing mine-roof support and is connected to a pressure-med... | 03/28/1995 |
| 5238330 | Displaceable mine roof support assemblies A mine roof support frame has a pair of spaced-apart floor skids on which hydraulic props support a roof engaging structure. A shifting mechanism with a ram in a trough-like housing and a guide beam is positioned between the skids and serves to displace t... | 08/24/1993 |
| 5199825 | Grid composite for longwall shield recovery in underground coal and trona mines A grid composite for protecting men and longwall mining equipment during longwall shield recovery includes a regular polymer geogrid structure formed by biaxially drawing a continuous sheet of select polypropylene material which is heat bonded to a polyes... | 04/06/1993 |
| 5190414 | Walking prop for mine tunnels A walking mining prop has a skid-lifting assembly in the region of the ram which braces the roof cap with respect to the skid formed by a bridge from which lifting cylinders are articulated and suspended. The pistons of these lifting cylinders are articul... | 03/02/1993 |
| 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 |
| 5104267 | Roof supports for a mining installation A mine roof support or lining frame for use in mine workings with thick inclined seams has hydraulic props mounted between an inclined goaf shield and a floor sill. The floor sill is coupled with a shifting mechanism to a frame supporting a conveyor exten... | 04/14/1992 |
| 5033913 | Mine roof support A mine roof support comprises a ground engageable base section, a canopy, a shield section pivotally connected at one end to one end of the canopy and at the other end to one or more members connected to the base section, and hydraulic props for raising a... | 07/23/1991 |
| 4940363 | Mine roof support assembly A mine roof support assembly comprises a mine roof support having a first end adjacent to the mine face and a second end remote from the mine face, an advancing mechanism for advancing the roof support towards the mine face, and a base lifting mechanism. ... | 07/10/1990 |
| 4856940 | Lemniscate mining supports This invention relates to a lemniscate mining support comprising a foot piece, a roof bar, an anti-fall shield connected between the foot piece and the roof bar, and movable props between the roof bar and the foot piece so as to move the roof bar. The joi... | 08/15/1989 |
| 4828433 | Roof supports A roof support employs an hydraulic piston and cylinder unit as an adjustment device between the goaf shield and the roof-engaging structure. The cylinder unit is mounted to the shield with the aid of a bearing body defining a cup receiving a spherical en... | 05/09/1989 |
| 4815898 | Roof supports To increase the height of operation of a shield type roof support an attachment is fitted to the floor sill or to each of a pair of spaced-apart floor skids. The attachment has side walls with bores for receiving pivot pins used to link the attachment to ... | 03/28/1989 |
| 4812081 | Movable consolidating trestle for securing the excavating edge The movable consolidating trestle (2) has driven caterpillars (1). The consolidating trestle comprises a cap (3) being supported on the frame (11) via props (5). The cap (3) has at least one front-side section which is bent, rounded or bendable in directi... | 03/14/1989 |
| 4797023 | Mine roof supports A mine roof support has a roof engaging canopy 23, a floor engaging base 12, and a hydraulic jack 24 acting between the canopy and the base for urging the canopy and the base apart. The hydraulic jack 24 is provided with at least two different locations, ... | 01/10/1989 |
| 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 |
| 4784532 | Mine roof supports A roof engaging structure for a mine roof support comprises at least two relatively movable roof engaging members 21 and 23, which are coupled together by at least two spaced-apart pivotal joints 25 and 26. The pivotal joints combine to influence the rela... | 11/15/1988 |
| 4747729 | Movable trestle The invention refers to a movable trestle of approximately rectangular horizontal projection and serving the purpose of supporting the roof in underground cavities in particular serving the purpose of securing the excavation edge when recovering pillars i... | 05/31/1988 |
| 4732511 | Mine roof supports A mine roof support includes a pair of substantially-parallel floor-engaging members, a roof engageable member, a shield pivotally-connected to the floor-engaging members, by at least one pair of parallel links, and pivotally-connected to the roof-engagea... | 03/22/1988 |
| 4708531 | Pivot connections for use with mine roof supports A mine roof support has gap seals in the form of L-shaped plates on its roof cap and goaf shield. The side walls of the plates overlap at the junctures between the roof cap and the goaf shield and these walls are interconnected with pivot connections each... | 11/24/1987 |
| 4701079 | Pivot connections for use with mine roof supports A mine roof support has gap seals in the form of L-shaped plates on its roof cap and goaf shield. The side walls of the plates overlap at the junctures between the roof cap and goaf shield and are connected with pivot connections each of which is composed... | 10/20/1987 |
| 4688968 | Chock block skidding device designed for the powered supports used in the mines A device designed to skid the chock blocks of a powered support of the type used in coal mines. The front of the skid cylinder is connected with a skid bar whose front end is jointed on an armored conveyor. The rear end of the cylinder is jointed on the r... | 08/25/1987 |
| 4662796 | Supporting pillar for mines The invention relates to a travelling support pillar for use in underground mines. The support pillar has a link subjected to the action of a positioning jack. The positioning jack extends between a gate and the rear of the top of the pillar. The position... | 05/05/1987 |
| 4629368 | Shield supports suitable for use in mines A shield support, suitable for use in mines, comprising a floor-engaging structure, a roof-engageable canopy, extendible and contractible prop means disposed between the floor-engaging structure and the canopy, and a shield assembly pivotally-connected to... | 12/16/1986 |
| 4607986 | Shield supports suitable for use in mines A shield support, suitable for use in mines, comprising a floor-engaging structure which includes two sledge or like elements disposed side-by-side and spaced apart one from the other, a roof-engageable canopy, a shield mounted for pivotal movement with r... | 08/26/1986 |
| 4557635 | Shield-type support frame A shield-type support frame for serving as a face support in underground mining operations having a bottom structure, a one-piece roof cap, at least one hydraulic plunger connecting the bottom structure and the roof cap and two shield elements arranged si... | 12/10/1985 |
| 4552487 | Mine roof support unit having dust suppression means A mine roof support unit has a roof shield for supporting the roof of a mine working, and a goaf shield for screening off the goaf space of the working. The mine roof support unit is provided with dust suppression means constituted by a flat-section spray... | 11/12/1985 |
| 4547098 | Mining equipment, mainly for extraction of heavy beds A mine excavator especially for heavy coal beds comprises a base on which the power loader and conveyor are provided and on which the roof support or shield is pivotally mounted. According to the invention, a back member connected to the roof plate and sp... | 10/15/1985 |
| 4525104 | Roof support for tunnel excavator A roof support for coal-mining apparatus or other tunnel-excavating equipment has a shield plate with several rearwardly diverging and deepening longitudinal grooves in its upper surface. The grooves are designed to carry off detritus as the support advan... | 06/25/1985 |
| 4518284 | Mine roof supports A mine roof support has a goaf shield with a lemniscate guide system linking the shield to floor-engaging skids. A walking-mechanism is disposed in a channel between the floor skids. In order to prevent rubble or goaf material from penetrating into the ch... | 05/21/1985 |
| 4511290 | Support frame for underground mining operations The invention relates to a structural frame for mining operations wherein at least one stabilization element is provided and coupled between the roof of the seam cap and the floor of the seam support base which is pivotable around a pivot axis extending i... | 04/16/1985 |
| 4474510 | Hydraulic mine-roof support The support assembly is made up of a floor-standing runner member 1, a hydraulically vertically-adjustable prop 2 mounted on the same, a roof canopy 3 supported by the same and a rockfall shield 4 hinged to the same on the backfill side which is guided to... | 10/02/1984 |
| 4465406 | Mine roof support unit A mine roof support unit has a roof bar supported on a floor sill by hydraulic props. The floor sill is constituted by a face-side floor sill part and a goaf-side floor sill part. The two floor sill parts are telescopically interconnected. Each of the flo... | 08/14/1984 |
| 4433945 | Method and apparatus for controlling a mine roof support In combination with a mine roof support including a sole plate resting on the sole of a mine gallery, a roof shield engaging the roof of the mine gallery, and fluid-operated extensible and collapsible props extending between the sole plate and the roof sh... | 02/28/1984 |
