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| Number | Title | Issue Date |
| 5385433 | Bearing plate An elongated channel beam for supporting the surface of an underground rock formation includes a base portion with a bearing surface for contacting the rock strata and an opposite surface having a longitudinally extending central rib and flanged edges for... | 01/31/1995 |
| 5321262 | Electron imaging band pass analyser for a photoelectron spectromicroscope A low pass filter for use in an image band pass filter of a photoelectron spectromicroscope incorporating a virtual potential surface for reflecting electrons below a particular energy and a special charged particle trap or super dump for unwanted electro... | 06/14/1994 |
| 5314268 | Non-metallic reinforcing rod and method of use in supporting a rock formation An elongated rod fabricated of polymeric material for use in reinforcing an underground passage includes an integral structure of a shaft portion, washer element and torque receiving end portion. The shaft portion is fabricated of a preselected polymeric ... | 05/24/1994 |
| 5311246 | Frequency modulated acutance guide and method of use A control area is imaged on photo-sensitive graphic arts material to be evaluated for the sharpness of images printed on the material through the various stages of the reproduction process. The control area includes a light transmitting image divided into... | 05/10/1994 |
| 5302056 | Method and apparatus for supporting a mine roof A pair of truss brackets are secured to the roof of an underground passage adjacent to opposing ribs of the passage. The truss brackets each include a roof engaging surface and a truss supporting arm member extending from the roof engaging surface. A pair... | 04/12/1994 |
| 5295733 | Fiber optic remote control system for a continuous miner and method of use A mining machine is controlled by a fiber optic controlled remote control system that includes one or more fiber optic cables that extend from a remote control station through a hose supplying water to the mining machine. The fiber optic cables exit the w... | 03/22/1994 |
| 5292209 | Bearing plate An elongated channel member for supporting the surface of an underground rock formation includes a base portion with a bearing surface for contacting the rock strata and an opposite surface having a longitudinally extending central rib and flanged edges f... | 03/08/1994 |
| 5275525 | Battery changer on a mobile machine A battery holder for containing an electric storage battery is transported by a lift unit on a mobile vehicle. The lift unit is pivotally mounted at a rearward end portion of the vehicle to move into surrounding relation with the battery holder positioned... | 01/04/1994 |
| 5271792 | Apparatus for mounting film negatives on aperture cards A web of cardstock divided by transverse score lines includes card segments having apertures oriented with respect to an optical center point of each card segment. The web is continuously fed from a supply of cardstock by engagement of a tractor feed devi... | 12/21/1993 |
| 5265941 | Underground mining system and method for developing longwall panel An entry system for a longwall panel for the mining of coal and the like by a shearer-type cutter includes a single entryway developed by a boring type mining machine. Intake air and return air passageways are formed in the entryway by a mine stopping bet... | 11/30/1993 |
| 5253925 | Method and apparatus for collecting and removing dust on a mining machine A first duct system extends longitudinally on one side of a mining machine frame from an air inlet adjacent to a cutter drum carried on a boom rearwardly to an air outlet at the rearward end of the machine frame. A fan assembly is mounted on the machine f... | 10/19/1993 |
| 5251555 | Method and apparatus for simultaneously forming a plurality of characters on the surface of an object The marking device has a housing supporting a marking head for movement longitudinally and laterally preselected amounts controlled by a pair of stepper motors. The marking head has a plurality of marking pins that are air actuated and controlled by appro... | 10/12/1993 |
| 5244314 | Expansion assembly An expansion assembly for use with resin on a mine roof bolt includes an expandable shell and a camming plug having a first end wall spaced from a second end wall by a tapered body portion. Four equidistantly spaced grooves extend longitudinally in the ta... | 09/14/1993 |
| 5243874 | Method and apparatus for telescopically assembling a pair of elongated members A pair of telescoping members include interconnecting end portions having a preselected configuration that facilitates the insertion of one tubular end portion into the other tubular end portion. The surface configuration of the interconnecting end portio... | 09/14/1993 |
| 5241884 | Apparatus for changing the length of envelope blanks cut from a continuous web A pair of pull rolls unwind web material from a roll and advance the web at a preselected linear feed rate to a web cutting mechanism. The pull rolls are rotated at a preselected speed to generate the desired linear speed rate for cutting the web at selec... | 09/07/1993 |
| 5224943 | Cryosurgical apparatus A cryosurgical probe for freezing human or animal tissue in a surgical procedure utilising the Joule Thomson effect. The probe is provided with a valve arrangement which enables selective purging and freezing cycles to be employed in rapid succession, and... | 07/06/1993 |
| 5195683 | Combination photographic negative and proof holder A film negative and matching proof are held for storage in a receptacle formed from a unitary body of flexible material folded to form panels positioned in overlying relation to form a first pocket and a second pocket. One panel is common to both pockets ... | 03/23/1993 |
| 5190384 | Dome and round parts rotary marker A rotor supports a plurality of marking devices in spaced relation around the arcuate surface of an object to be marked which is fixed relative to the rotor. The rotor is mounted for rotation about an axis which is coaxial with an axis of the object to be... | 03/02/1993 |
| 5190352 | Mining machine with cascading conveyor system and method of conveying A mining machine includes a material dislodging mechanism and a cascading conveyor system extending rearwardly on a mobile frame. The cascading conveyor system includes a fixed, main conveyor and a discharge conveyor underlying the main conveyor and pivot... | 03/02/1993 |
| 5188427 | Twin scrubber and air diffuser for a continuous miner and method of ventilation A continuous mining machine is provided with dual ductwork having reversible fans. The ductwork extends longitudinally along each side of the continuous mining machine. Each fan is positioned in a duct at the rear end of the frame of the mining machine. A... | 02/23/1993 |
| 5184923 | Expansion shell assembly A tapered camming plug positioned within an expansion shell is threaded onto an upper end portion of an elongated bolt advanced behind a resin cartridge system into a bore hole drilled in a rock formation. A bearing plate is carried on the opposite end of... | 02/09/1993 |
| 5181800 | Mine roof anchor having adjustable resin retaining washer A roof anchor for supporting an underground mine roof or the like is provided. The roof anchor has an elongated shaft with a head formed at one end. The head supports a washer and a roof supporting plate that surrounds the mouth of a blind bore formed upw... | 01/26/1993 |
| 5180120 | Convertible aircraft seat A main seat support frame includes slidable seat sections to allow the overall length of the seat and the number of sitting positions to be varied as required. The frame is provided with fixing positions for arm dividers which allow delimitation of a pred... | 01/19/1993 |
| 5166519 | Electron imaging band pass analyser for a photoelectron spectromicroscope A low pass filter for use in an image band pass filter of a photoelectron spectromicroscope incorporating a virtual potential surface for reflecting electrons below a particular energy and a special charged particle trap or super dump for unwanted electro... | 11/24/1992 |
| 5154396 | Reinforced plastic valve A polyethylene plastic valve has a molded cylindrical body portion with an internal chamber with inlet and outlet openings. A unitary plastic plug member is rotatably positioned in the chamber. The plug member has an actuator portion formed of impact resi... | 10/13/1992 |
| 5143423 | Drum assembly for a continuous miner A cylindrical drum assembly is rotatably mounted transversely on the front of the boom member of a continuous miner. The drum assembly comprises a pair of independently operable drum sections. Each drum section is driven through an input shaft connected t... | 09/01/1992 |
| 5135270 | Apparatus for connecting the ends of a pair of oval duct sections Apparatus for connecting the ends of a pair of oval duct sections includes a pair of arcuate frame sections and a pair of linear intermediate frame sections that are connected to each other by connector pieces having leg portions extending into receivers ... | 08/04/1992 |
| 5129690 | Apparatus for connecting the ends of a pair of oval duct sections Apparatus for connecting the ends of a pair of oval duct sections includes a pair of arcuate frame sections and a pair of linear intermediate frame sections or a pair of frame sections with a linear portion and a pair of semi-circular end portions. The se... | 07/14/1992 |
| 5130664 | One GHZ CATV repeater station An apparatus for and a method of RF amplification of signals up to 1 GHz. The apparatus, known as a repeater station, is for use in Community Antenna TeleVision transmission (CATV). The RF amplification (gain) stage includes two multitransistor distribute... | 07/14/1992 |
| 5120112 | Vane type conveyor for a mining machine drum A continuous mining machine has a drum assembly rotatably supported thereon generally transversely to the axis of the mining machine frame. The drum member has a cylindrical outer surface supporting cutter bits for sumping into the mine face. Between the ... | 06/09/1992 |
| 5118414 | Rotary screening device A rotary screening device for separating unwanted solid matter such as sewage, weeds, tar globules and fish from water which is to be used for special purposes such as water cooling or other plant processes. The device comprises a rotating hollow stack of... | 06/02/1992 |
| 5110189 | Redundant remote control system used on a continuous miner and method of using same A redundant remote control system for use on a continuous miner having a radio remote control system for the remote control of a continuous miner. The radio remote control system having switches, a multiplexer, a radio transmitter, a radio receiver, a dem... | 05/05/1992 |
| 5103549 | Method for connecting the ends of a pair of oval duct sections Apparatus for connecting the ends of a pair of oval duct sections includes a pair of arcuate frame sections and a pair of linear intermediate frame sections or a pair of frame sections with a linear portion and a pair of semi-circular end portions. The se... | 04/14/1992 |
| 5104194 | Continuous miner with improved duct system and method of increasing duct cross section A self-propelled continuous mining machine which includes a mobile frame assembly having a material dislodging device, and a conveying system. A dust collecting system is positioned on the mobile frame assembly for inducing a flow of air through a duct sy... | 04/14/1992 |
| 5102199 | Continuous mining machine with a boom assembly providing different cutting heights and method of converting A self propelled continuous mining machine includes a mobile frame assembly having a first pivot point for a boom assembly or an end of a piston cylinder assembly and a second pivot point for pivotally connecting an end of a piston cylinder assembly or pi... | 04/07/1992 |
| 5099976 | Fire extinguishing apparatus for compressors A fire extinguishing apparatus is connected to the safety valve on an oil flooded rotary compressor to receive the contents expelled by the compressor due to internal combustion in the compressor. The contents are conducted to the fire extinguishing appar... | 03/31/1992 |
| 5100103 | Reinforced plastic valve A reinforced plastic valve includes a generally cylindrical major body portion which is at least partially formed of a plastic material. The major body portion has an axially extending interior chamber. A pair of flow lines intersect the major body portio... | 03/31/1992 |
| 5100371 | Envelope blank forming machine An envelope blank forming machine for forming generally rectangular booklet envelope blanks and generally diagonal envelope blanks on the same machine includes a pair of removable turnbars, adjustable pull rolls and an adjustable cutoff device. Preselecte... | 03/31/1992 |
| 5094658 | Vacuum side-folder section for envelope blank folding apparatus An envelope forming apparatus has a vacuum table with apertures through which a vacuum is applied onto the surface of the vacuum table. A series of parallel endless belts move across the vacuum table and transport an envelope blank across the vacuum table... | 03/10/1992 |
| 5091962 | Method and apparatus for detecting a sheet strip material misfeed condition A plurality of individual frames or stampings provided in a sheet strip material by a stamping device are passed in proximity to a sensing device. As each individual frame or stamping is passed in proximity to the sensing device, the sensing device provid... | 02/25/1992 |
