Patents by Inventor Hiromitsu Naka

Hiromitsu Naka 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: 5025891
    Abstract: The escape of the present invention is installed in each storey of a building and comprises a storage space for the escape, a sliding platform, and an escape passageway. The storage space is formed in each storey of the building to have a configuration of a rectangular parallelepiped. The storage space has an opening in an external wall of a building. The platform is normally put away in the storage space and, in case of emergency, slides out from the opening of the storage space to form a landing of the escape passageway. The escape passageway is put up in the platform while one end of the passageway is pivotally attached to the platform to rotate the passageway downwards. When the escape is used, one end of the escape passageway rotates toward a lower platform to form an inclined passage between the upper and lower platforms.
    Type: Grant
    Filed: January 23, 1990
    Date of Patent: June 25, 1991
    Assignee: Naka Technical Laboratory
    Inventors: Hiromitsu Naka, Yutaka Asai, Shouzi Naka
  • Patent number: 4843789
    Abstract: A ceiling construction for buildings has a plurality of flanged main beams disposed in a predetermined spaced relationship to each other and bridging wall mouldings opposed and spaced from each other; a plurality of flanged cross beams connected to the main beams in a predetermined spaced relationship to each other at right angles on the main beams so as to form a ceiling framework; a ceiling wall mounted to the ceiling framework so as to form an access opening in a predetermined position; a pair of auxiliary beams; an access door; and a plurality of mounting devices for the access door. The pair of auxiliary beams each is bridged in a predetermined relationship to the opposite main beams of the main beams adjacent to and spaced from each other or the opposite cross beams of the cross beams adjacent to and spaced from each other on the inner side of the ceiling wall in relation to the access opening.
    Type: Grant
    Filed: July 19, 1983
    Date of Patent: July 4, 1989
    Assignee: Kabushiki Kaisha Naka Gijutsu Kenkyusho
    Inventor: Hiromitsu Naka
  • Patent number: 4646490
    Abstract: A top rail for handrails comprises a top rail body formed of soft synthetic resin, semi-hard synthetic resin or synthetic rubber and having a bendable metal core incorporated therein extending in the longitudinal direction thereof. The bendable metal core is bendable under a force in excess of a predetermined value and maintains the top rail body in its bent position when the core is bent together with the body. The bendable metal core can be the form of an elongated solid steel bar, to which a lubricant has been applied to the surface thereof and soft or semi-hard synthetic resin is extruded about the lubricant applied surface to form the top rail body. The bendable metal core can also be in the form of an elongated solid aluminum or aluminum alloy bar to which is applied adhesive about the surface thereof and soft or semi-hard synthetic resin is extruded about the adhesive applied surface.
    Type: Grant
    Filed: May 25, 1983
    Date of Patent: March 3, 1987
    Assignee: Kabushiki Kaisha Naka Gijutsu Kenkyusho
    Inventors: Hiromitsu Naka, Takeshi Miyashiro, Yoshihide Sugimoto
  • Patent number: 4619086
    Abstract: A ceiling construction for buildings has a plurality of flanged main beams disposed in a predetermined spaced relationship to each other and bridging wall mouldings opposed and spaced from each other; a plurality of flanged cross beams connected to the main beams in a predetermined spaced relationship to each other at right angles to the main beams so as to form a ceiling framework; a ceiling wall mounted on the ceiling framework so as to form an access opening in a predetermined position; a pair of auxiliary beams; a plurality of fastening devices for the auxiliary beams; an access door; and a plurality of mounting devices for the access door. The pair of auxiliary beams each is bridged in a predetermined relationship to flanges the opposite main beams of the main beams adjacent to and spaced from each other or flanges of the opposite cross beams of the cross beams adjacent to and spaced from each other in the access opening on the ceiling wall.
    Type: Grant
    Filed: July 19, 1983
    Date of Patent: October 28, 1986
    Assignee: Kabushiki Kaisha Naka Gijutsu Kenkyusho
    Inventor: Hiromitsu Naka
  • Patent number: 4602766
    Abstract: A top rail for handrails comprises a top rail body formed of soft synthetic resin, semi-hard synthetic resin or synthetic rubber and having a bendable metal core incorporated therein extending in the longitudinal direction thereof. The bendable metal core is bendable under a force in excess of a predetermined value and maintains the top rail body in its bent position when the core is bent together with the body. The bendable metal core can be the form of an elongated solid steel bar, to which a lubricant has been applied to the surface thereof and soft or semi-hard synthetic resin is extruded about the lubricant applied surface to form the top rail body. The bendable metal core can also be in the form of an elongated solid aluminum or aluminum alloy bar, to which is applied adhesive about the surface thereof and soft or semi-hard synthetic resin is extruded about the adhesive applied surface.
    Type: Grant
    Filed: December 21, 1981
    Date of Patent: July 29, 1986
    Assignee: Kabushiki Kaisha Naka Gijutsu Kenkyusho
    Inventors: Hiromitsu Naka, Takeshi Miyashiro, Yoshihide Sugimoto
  • Patent number: 4593493
    Abstract: An access door to be installed on the ceiling or the like of a building which essentially comprises an outer square frame adapted to be installed in an opening formed at said installation area; an inner square frame pivotally connected to said outer frame for movement between open and closed positions; a pair of link hinge means provided on each of two selected sides of said outer frame to pivotally connect said frame to said outer frame; and a lock means for locking said inner frame to said outer frame as the inner frame is in its closed position.The inner frame has a joint finishing flange at the peripheral edge thereof to conceal the peripheral edge of said outer frame as the inner frame is in its closed position.
    Type: Grant
    Filed: June 11, 1984
    Date of Patent: June 10, 1986
    Assignee: Kabushiki Kaisha Naka Gijutsu Kenkyusho
    Inventors: Hiromitsu Naka, Takehiko Okushima, Tatsuo Shoji
  • Patent number: 4566233
    Abstract: A ceiling construction for buildings has a plurality of flanged main beams disposed in a predetermined spaced relationship to each other and bridging between wall mouldings opposed and spaced from each other; a plurality of flanged cross beams connected to the main beams in a predetermined spaced relationship to each other at right angles to the main beams so as to form a ceiling framework; a ceiling wall mounted on the ceiling framework so as to form an access opening in a predetermined position; a pair of auxiliary beams; an access door; and a plurality of hanger devices for the access door. The pair of auxiliary beams each is bridged in a predetermined relationship across the webs of the opposed main beams of the main beams adjacent to and spaced from each other or webs of the opposed cross beams of the cross beams adjacent to and spaced from each other in the access opening.
    Type: Grant
    Filed: July 19, 1983
    Date of Patent: January 28, 1986
    Assignee: Kabushiki Kaisha Naka Gijutsu Kenkyusho
    Inventor: Hiromitsu Naka
  • Patent number: 4486987
    Abstract: A stair nosing is constituted by a flat frame for lying on a tread of a stair, a non-skid flat tire-like sheet adapted to be snappedly engaged to the flat frame and a tongue-shaped protector for the engaging portion of the flat sheet frame and the non-skid flat sheet. The non-skid flat sheet includes a connecting plate of rigid synthetic resin having a flange with a rib at one edge and a non-skid flat tread of flexible synthetic resin integrally formed on the upper surface of the connecting plate. The tongue-shaped protector is integrally formed with the non-skid flat tread so as to cover the engaging portion of the frame sheet and be spaced from a riser of the stair when the non-skid flat sheet is secured to the flat sheet frame.
    Type: Grant
    Filed: December 16, 1982
    Date of Patent: December 11, 1984
    Assignee: Kabushiki Kaisha Naka Gijutsu Kenkyusho
    Inventor: Hiromitsu Naka
  • Patent number: 4455797
    Abstract: A stair nosing is constituted by an edge base made of a hard material and adapted to be installed on the tread of a stair step, and an edge bead cushion formed on a surface of the edge base so as to be located at the stair tread nosing of the stair step. A positioning groove is formed on the surface of the edge base behind the edge bead cushion, and a gripper is adapted to be set in the positioning groove and to be secured to the edge base. The edge base is provided with a riser cover integrally formed at the front edge thereof so as to be positioned on the riser of the step in a manner to fit over the stair tread nosing. The gripper is composed of a sheet member adapted to be positioned in the groove and a number of spaced nails projected from the surface of the sheet member.
    Type: Grant
    Filed: September 14, 1981
    Date of Patent: June 26, 1984
    Assignee: Kabushiki Kaisha Naka Gijutsu Kenkyusho
    Inventor: Hiromitsu Naka
  • Patent number: 4443973
    Abstract: An access door is constituted by an outer framework adapted to be fitted in a rough opening formed in a building ceiling, wall, or the like, an inner framework set in an opening in the outer framework, a cover plate secured to the inner framework so as to close an opening in the inner framework, a pair of bearings and axis for pivotally connecting the inner framework to the outer framework, and a locking means for locking the inner framework to the outer framework when the inner framework closes the opening in the outer framework. The bearings are projected on one framework of the opposite inner surfaces of the outer framework and the opposite outer surfaces of the inner framework, and have U-shaped bearing surfaces. The axis are projected on another framework of the opposite inner surfaces of the outer surfaces of the inner framework, and pivotally supported to the bearings, respectively.
    Type: Grant
    Filed: July 14, 1981
    Date of Patent: April 24, 1984
    Assignee: Kabushiki Kaisha Naka Gijutsu Kenkyusho
    Inventor: Hiromitsu Naka
  • Patent number: 4321294
    Abstract: A stair mat is installed on the stairs in a manner as an edge cushion cover of flexible synthetic resin and a tread mat are adapted to the stairs, being adjacent each other, by the use of a connecting base sheet member having stiffness.The connecting base sheet member is provided with a hook-shaped rib or a plurality of thorns, and the edge cushion cover is provided with a catching groove or a flexible connecting layer corresponding to the hook-shaped rib or a plurality of thorns on the under surface.
    Type: Grant
    Filed: November 13, 1979
    Date of Patent: March 23, 1982
    Inventor: Hiromitsu Naka
  • Patent number: 4321293
    Abstract: A stair mat is installed on the stairs by adapting an edge cushion cover and a tread mat on the tread of the stairs adjacent to each other; a rigid or semi-rigid fixing tongue is projected from the front edge of the tread mat, and the edge cushion cover is detachably set on the fixing tongue so as to cover the forward edge of the stairs.
    Type: Grant
    Filed: November 13, 1979
    Date of Patent: March 23, 1982
    Inventor: Hiromitsu Naka
  • Patent number: 4318951
    Abstract: The invention relates to the installation of stair mats on stairs in a manner such that the edge cover is formed of a flexible synthetic resin or flexible rubber and a tread mat are adapted to the stairs, being adjacent to each other; the front edge of the tread mat being set on a tread side fixing tongue of the edge cover and the front edge of the tread mat being fixed on the tread side fixing tongue of the edge cover by an adhesive or by stitching.A thin tread side fixing tongue is integrally and horizontally extended from the rear portion of an edge bead cushion of the edge cover.
    Type: Grant
    Filed: December 27, 1979
    Date of Patent: March 9, 1982
    Inventors: Hiromitsu Naka, Takeshi Miyashiro, Yoshihide Sugimoto
  • Patent number: 4244443
    Abstract: A drawer type emergency escape is constituted by a stowage box attached to a support, a slidable frame normally received in the stowage box and extended out of the stowage box as the escape is employed, and a shift mechanism for pulling the slidable frame out of the stowage box as the escape is employed. An extensible escape device is connected to the slidable frame, is normally received in the frame for extending out of the frame as the escape is employed and comprises a plurality of telescopically connected pipe sections of different cross-sectional areas.
    Type: Grant
    Filed: January 4, 1979
    Date of Patent: January 13, 1981
    Assignee: Kabushiki Kaisha Naka Gijutsu Kenkyusho
    Inventor: Hiromitsu Naka
  • Patent number: 4240521
    Abstract: A drawer type emergency escape is constituted by a stowage box adapted to be attached to a support, a slidable frame adapted to be slidably extended out of and retracted into the stowage box, a telescopically extensible escape means attached to the slidable frame to be received into and extended out of the frame, and a shift mechanism for pulling the slidable frame out of the stowage box as the escape is employed. The shift mechanism includes a drive arm connected to a shift handle, a slide shift link, a connection link connecting the drive arm to the slide shift link and an extensible tong means disposed between the slide shift link and slidable frame for extending and retracting the slidable frame out of and into the stowage box.
    Type: Grant
    Filed: May 9, 1979
    Date of Patent: December 23, 1980
    Assignee: Kabushiki Kaisha Naka Gijutsu Kenkyusho
    Inventor: Hiromitsu Naka
  • Patent number: 4236601
    Abstract: A turning type emergency escape is constituted by a rotary stowage box defining an evacuation passage therein, upper and lower covers pivoted to upper and lower portions of the inner side of the evacuation passage, a cover interlocking mechanism interlocking the upper and lower covers for simultaneously opening and closing movements, and a turning mechanism for rotating the stowage box between retracted and protruded positions. An extensible escape means is connected to the stowage box at the evacuation passage and is normally received in the evacuation way for extending out of the stowage box for escape. The extensible escape means has a plurality of telescopically connected pipe sections of different cross-sectional areas.
    Type: Grant
    Filed: December 27, 1978
    Date of Patent: December 2, 1980
    Inventor: Hiromitsu Naka
  • Patent number: 4220316
    Abstract: A top rail for use in connection with a railing construction or the like is constituted by a main top rail member, a resilient cushion layer fitted on the main top rail member, and a surface portion layer integrally formed with the outer surface of the resilient cushion layer. the main top rail member has a support post receiving slot extending in the longitudinal direction of the top rail and opening downwardly.
    Type: Grant
    Filed: July 21, 1978
    Date of Patent: September 2, 1980
    Assignee: Kabushiki Kaisha Naka Gijutsu Kenkyusho
    Inventors: Hiromitsu Naka, Takeshi Miyashiro, Hidetoshi Kawase, Yoshihde Sugimoto, Tsutomu Shirataki, Hiroshi Morishita
  • Patent number: D273994
    Type: Grant
    Filed: January 4, 1982
    Date of Patent: May 22, 1984
    Assignee: Kabushiki Kaisha Naka Gijutsu Kenkyusho
    Inventor: Hiromitsu Naka
  • Patent number: D273995
    Type: Grant
    Filed: January 4, 1982
    Date of Patent: May 22, 1984
    Assignee: Kabushiki Kaisha Naka Gijutsu Kenkyusho
    Inventor: Hiromitsu Naka
  • Patent number: D283548
    Type: Grant
    Filed: July 18, 1983
    Date of Patent: April 22, 1986
    Inventor: Hiromitsu Naka