Patents by Inventor Masasumi Murai

Masasumi Murai has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5093590
    Abstract: A linear motor driven conveyor apparatus is disclosed for conveying trucks carrying articles to be processed through a paint booth or other treatment area having a dirt-laden atmosphere, and water supply means are provided to produce a continuously flowing film of water over the upper surfaces of the primary members of the linear motor to keep such surfaces free of contaminants.
    Type: Grant
    Filed: January 24, 1990
    Date of Patent: March 3, 1992
    Assignee: Tsubakimoto Chain Company
    Inventors: Masasumi Murai, Jun Nishiyama
  • Patent number: 5014625
    Abstract: A linear motor driven conveyor which includes a carrier rail and primary members provided within a pit, main trolleys adapted to run along the carrier rail and connected with a carrying frame, and front and rear trolleys. The connecting members are pivotably connected vertically and horizontally with each trolley within the pit, the lower surfaces of the connecting members each having a reaction plate of a linear induction motor.
    Type: Grant
    Filed: July 5, 1989
    Date of Patent: May 14, 1991
    Assignee: Tsubakimoto Chain Company
    Inventors: Masasumi Murai, Koichi Mizuguchi, Jun Nishiyama
  • Patent number: 4996927
    Abstract: There is disclosed a truck for use with a linear motor drive conveyor for conveying articles such as automotive bodies through a paint station. Shield means are provided carried by the reaction plate which in turn is carried by the truck. The shield means includes a central flat plate and downturned side edges which overlie and protect the gap between the reaction plate and the primary members of the linear motor from paint or other foreign particles.
    Type: Grant
    Filed: July 5, 1989
    Date of Patent: March 5, 1991
    Assignee: Tsubakimoto Chain Co.
    Inventors: Masasumi Murai, Koichi Mizuguchi, Jun Nishiyama
  • Patent number: 4936222
    Abstract: A conveying apparatus having an overhead conveyor; a L-shaped hanger suspended from the overhead conveyor, a load supporting portion of the hanger being located sidewardly of the conveyor; a guide roller provided on the load supporting portion; and a guide rail for guiding the roller. The L-shaped hanger may be suspended through a C-shaped fitting, the opening of the C shape facing toward the load supporting portion of the hanger; and a foreign matter shield may be provided having both a horizontal plate member projecting into the opening of the C shape and an upright plate member.
    Type: Grant
    Filed: November 18, 1988
    Date of Patent: June 26, 1990
    Assignee: Tsubakimoto Chain Co.
    Inventor: Masasumi Murai
  • Patent number: 4811685
    Abstract: Conveyor assemblies adapted for use in painting booths, embodying conveyor units having upper and lower frames spaced apart by post portions aligned in the direction of travel. A dust cover encloses the drive mechanism and has a top wall between the upper and lower frames. A slot is provided to permit passage of the aligned post portions, and the slot is covered by a resilient flexible flap which can be displaced by the post portions as they travel through the slot. The drive mechanism includes alternative drive chains, one of which has a pusher for effecting advance of the units, the other of which has a bifurcated coupling which may effect both advance and retraction of the units along their path of travel. The lower frame has swivelable wheels which may ride in the elevated wheel-guide tracks in the painting booth to provide stabilization of the frame against lateral sway.
    Type: Grant
    Filed: October 5, 1987
    Date of Patent: March 14, 1989
    Assignee: Tsubakimoto Chain Co.
    Inventor: Masasumi Murai
  • Patent number: 4691640
    Abstract: A floor conveyor eliminates inclination and rolling of a vehicular body during conveying. A pair of channel members having a substantially rectangular recess on one side are oppositely arranged just under a working floor with sufficiently large spacing defined therebetween to form a carrier track, and cylindrical travelling rollers arranged at front and rear portions of a carrier are inserted into the recess of the rails. Vertical shaft guide rollers are rotatably supported on the travelling roller shafts of the carrier. At a substantially central position just above the roller shafts the rollers have a width smaller than a spacing between the rails. The support legs are inserted through the guide channels, and comprise a C-shaped structure where a part of the support legs on the floor surface is recessed sidewardly with respect to a conveying direction.
    Type: Grant
    Filed: October 7, 1985
    Date of Patent: September 8, 1987
    Assignee: Tsubakimoto Chain Co.
    Inventor: Masasumi Murai
  • Patent number: 4440090
    Abstract: Storage arrangement for truck conveyor trolleys is provided wherein trolley units are designed to run within a conveyance path defined by a trolley rail. The trolley units are engageable with a truck for receiving articles to be carried and can be attached and detached from the truck by positioning the trolley units on segmented rail portions integrally formed as part of the trolley running rail. By raising or lowering the scissioned rail segments with the trolley units positioned thereon, the trolley units will automatically engage with and disengage from the truck. Once disconnected from the truck, the trolley units can be stored in large numbers in a storage place, either on the rail segments or on separate storage rails.
    Type: Grant
    Filed: February 16, 1982
    Date of Patent: April 3, 1984
    Assignee: Tsubakimoto Chain Company
    Inventors: Masasumi Murai, Hirokazu Kondo, Shigekatzu Takino
  • Patent number: 4438701
    Abstract: A truck conveyor for conveying an article along a selected conveyance path is provided. The truck conveyor includes a series of trolleys which are guided along a trolley rail. An article carrier for receiving articles is connected with the series of trolleys for conveying an article along the rail. A drive mechanism engageable with the trolleys is provided for conveying the trolleys and the article carrier along the rail. A device is provided at the rear of a stopped carrier to automatically disengage the drive mechanism from the trolleys of a trailing carrier when it is carried toward engagement with the stopped article carrier.
    Type: Grant
    Filed: February 16, 1982
    Date of Patent: March 27, 1984
    Assignee: Tsubakimoto Chain Company
    Inventors: Masasumi Murai, Hirokazu Kondo, Shigekatsu Takino