Patents Assigned to Mefcor, Inc.
  • Patent number: 5303579
    Abstract: A conveyor-belt moisture control sensor apparatus (10) includes a sensor device (12) having an electrically-insulative block (30) with two adjacent electrodes (32, 34) extending therefrom to contact a top surface (22) of a return portion (24) of a conveyor belt (26). Two wires (36, 38) are mounted on the electrically-insulative block and connected to connection ends of the electrodes at encapsulated points in the electrically-insulative block. A hinge mechanism (40) mounts the electrically-insulative block to a conveyor-belt support frame (44) for allowing the electrically-insulative block to rotate, thereby bringing the electrodes into contact with the conveyor belt. A drip guard (98) extends from the electrically-insulative block above the electrodes.
    Type: Grant
    Filed: February 3, 1993
    Date of Patent: April 19, 1994
    Assignee: MEFCOR, Inc.
    Inventor: Donald G. Smith, Jr.
  • Patent number: 4276981
    Abstract: A pump assembly to be used for mining, and the like, is supported on rope-like members (32, 110, 112, 140, 181, 190) of an endless conveyer. In one type of embodiments a channel-shaped mounting member (20, 72, 138, 164, 192) of the pump assembly straddles the rope-like support members and allows the weight distribution of the pump assembly to cause a drive wheel (16, 68, 142, 146, 196) of the pump assembly to come into contact with the endless conveyer (28, 144, 198) to thereby drive a pump (18, 76, 134, 160, 182) of the pump assembly. In a particular one of these types of embodiments the pump (134) is mounted inside the rope-like support member (140) to urge the drive wheel (142) downwardly against the return portion (144) of the endless conveyer and in other particular ones of these types of embodiments the pump (18, 76, 160) is located outside the rope-like support member (32, 181) so that the drive wheel (16, 68, 146) is urged upwardly against the conveying portion (28 ) of the endless conveyer.
    Type: Grant
    Filed: January 8, 1980
    Date of Patent: July 7, 1981
    Assignee: Mefcor, Inc.
    Inventors: Frank K. Hurt, Edwin L. Wellons
  • Patent number: 4213743
    Abstract: A pump assembly to be used for mining, and the like, is supported on rope-like members (32, 110, 112, 140, 181,190) of an endless conveyer. In one type of embodiments a channel-shaped mounting member (20, 72, 138, 164, 192) of the pump assembly straddles the rope-like support members and allows the weight distribution of the pump assembly to cause a drive wheel (16, 68, 142, 146, 196) of the pump assembly to come into contact with the endless conveyer (28, 144, 198) to thereby drive a pump (18, 76, 134, 160, 182) of the pump assembly. In a particular one of these types of embodiments the pump (134) is mounted inside the rope-like support member (140) to urge the drive wheel (142) downwardly against the return portion (144) of the endless conveyer and in other particular ones of these types of embodiments the pump (18, 76, 160) is located outside the rope-like support member (32, 181, 164) so that the drive wheel (16, 68, 146) is urged upwardly against the conveying portion (28) of the endless conveyer.
    Type: Grant
    Filed: April 20, 1978
    Date of Patent: July 22, 1980
    Assignee: Mefcor, Inc.
    Inventors: Frank K. Hurt, Edwin L. Wellons
  • Patent number: RE30551
    Abstract: An endless-conveyor monitoring switch assembly includes an elongated frame having a shaft journaled for rotation therein and extending longitudinally therealong. A drive wheel is attached to and rotatable with the shaft at a first end of the elongated frame and a detecting switch is attached to the shaft at the opposite end of the elongated frame. A seesaw, U-shaped, mounting member is attached to the elongated frame at a point intermediate the drive wheel and the detecting switch for mounting the elongated frame on an endless-conveyor cable support. The mounting member allows the weight of the elongated frame and its attachments to pivot the frame in a seesaw manner to bring the drive wheel into contact with the endless conveyor. The detecting switch includes a conductive disc mounted on the shaft adjacent to a pendulum having permanent magnets and mercury switches mounted thereon.
    Type: Grant
    Filed: July 16, 1979
    Date of Patent: March 24, 1981
    Assignee: Mefcor, Inc.
    Inventors: Frank K. Hurt, Edwin L. Wellons
  • Patent number: RE30570
    Abstract: An endless-conveyor monitoring switch assembly includes an elongated frame having a shaft journaled for rotation therein and extending longitudinally therealong. A drive wheel is attached to and rotatable with the shaft at a first end of the elongated frame and a detecting switch is attached to the shaft at the opposite end of the elongated frame. A seesaw, U-shaped, mounting member is attached to the elongated frame at a point intermediate the drive wheel and the detecting switch for mounting the elongated frame on an endless-conveyor cable support. The mounting member allows the weight of the elongated frame and its attachments to pivot the frame in a seesaw manner to bring the drive wheel into contact with the endless conveyor. The detecting switch includes a conductive disc mounted on the shaft adjacent to a pendulum having permanent magnets and mercury switches mounted thereon.
    Type: Grant
    Filed: July 16, 1979
    Date of Patent: April 7, 1981
    Assignee: Mefcor, Inc.
    Inventor: Frank K. Hurt