Patents by Inventor Tomio Nitta

Tomio Nitta 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: 4927747
    Abstract: A noncontrolling type valve for use in a gaslighter, a portable cooking stove and other burners, which valve comprises a valve body push-fitted in a recess formed in the top plate of a gas container; and a filter positioned under the valve body to permit the gas to flow at a controlled rate. The valve according to the present invention uses a porous concave object as a filter. The filter is laid on an impermeable, resilient membrane. The gas invades the concave space of the porous object from the outside to flow in the valve opening. The rise of the surrounding temperature will cause the membrane to bend yieldingly upwards to cover the inside of the porous object, thereby preventing the increase of the gas flow passing through the porous object over a predetermined flow rate.
    Type: Grant
    Filed: April 24, 1989
    Date of Patent: May 22, 1990
    Assignee: Tokai Corp.
    Inventor: Tomio Nitta
  • Patent number: 4919610
    Abstract: Disclosed is an improvement of gas lighter of the type which comprises a main body having a gas well, a gas-ejection nozzle fixed to the ceiling of the gas well, a cap operatively connected to the gas-ejection nozzle, and a fire-striking unit having a rotatable file and an associated flint. Such a gas lighter is improved in that the fire-striking unit has a connecting pipe under its bottom surface, the pipe communicating with the gas-ejection nozzle at its rear end and being open at its top end in the vicinity of the rotatable file. The building-in of the connecting pipe on the lower surface of the fire-striking unit permits reduction of the number of parts to be handled in the assembling line.
    Type: Grant
    Filed: December 16, 1988
    Date of Patent: April 24, 1990
    Assignee: Tokai Corporation
    Inventor: Tomio Nitta
  • Patent number: 4906179
    Abstract: Disclosed is an improved inner combustion type of gaslighter whose inner combustion unit comprises: a mixing conduit connected to the upper end of the gas ejection nozzle; a combustion conduit integrally connected to the mixing conduit; a diffusion plate fixed in the boundary between the mixing conduit and the combustion conduit. To improve the burning efficiency by mixing the air and the combustible gas thoroughly in the combustion conduit, the diffusion plate has a plurality of apertures each having an inclined blade to cause the air drawn into the mixing conduit and the combustible gas ejected from the gas ejection nozzle to whirl in eddies.
    Type: Grant
    Filed: June 20, 1989
    Date of Patent: March 6, 1990
    Assignee: Tokai Corporation
    Inventor: Tomio Nitta
  • Patent number: 4904180
    Abstract: Disclosed is a piezoelectric gas lighter equipped with a safety lock means to prevent undesired ignition. It uses a spring-biased stopper to keep the gaslighter locked and cause an automatic return to locked position after use, thereby guaranteeing prevention of any accident which might otherwise be caused if the gaslighter is inadvertently unlocked or if the gaslighter is by chance unlocked while it is being carried.
    Type: Grant
    Filed: June 6, 1989
    Date of Patent: February 27, 1990
    Assignee: Tokai Corporation
    Inventor: Tomio Nitta
  • Patent number: 4884964
    Abstract: Disclosed is a file assembly which is adapted to be fitted in and integrally connected to the top of a gas lighter housing, comprising a rotatable file disk and a file block having two opposite support plates each having a semicircular-and-wide-and-narrow slot made on its inside, leaving its outside for ornamental space. Necessary bearings for the flint wheel can be formed by inserting narrow-and-wide rectangular pieces in the semicircular-and-narrow-and-wide slots of the opposite support plates, leaving the semicircular-and-narrow rectangular spaces enough to snugly accommodate the opposite ends of the axle of the flint wheel, thereby eliminating the necessity of making very small pivot holes exactly at selected places in selected parts of the lighter, and hence reducing the manufacturing cost by as much as would cost if such very small holes were made exactly at selected places in selected parts of the lighter.
    Type: Grant
    Filed: December 15, 1988
    Date of Patent: December 5, 1989
    Assignee: Tokai Corporation
    Inventor: Tomio Nitta
  • Patent number: 4884965
    Abstract: Disclosed is a gaslighter structure comprising a lighter housing equipped with female pivot means provided to the rear, upper side of the housing; a fire-striking unit having push-fit means to integrally combine the unit with the housing, and a cap having male pivot means to fit in the female pivot means of the housing. This arrangement permits the push-fit assembling of the fire-striking unit to the housing and the cap to the housing, thereby simplifying the assembling work and accordingly contributing the automatization of the assembling process.
    Type: Grant
    Filed: December 16, 1988
    Date of Patent: December 5, 1989
    Assignee: Tokai Corporation
    Inventor: Tomio Nitta
  • Patent number: 4878836
    Abstract: Disclosed is an improved gaslighter structure using a flint for striking flame. To facilitate the assembling work so as to permit automatic assembling, the gaslighter structure uses a mount which is designed to permit the assembling of parts into a flame-striking device and the connecting of the flame-striking device to related parts for synchronizing the flame-striking operation with the ejection of petroleum gas from the nozzle assembly by simply mounting the parts to the mount at selected portions. Then, the mount with the flame-striking device and associated parts is push-fitted to the lighter housing.
    Type: Grant
    Filed: April 28, 1989
    Date of Patent: November 7, 1989
    Assignee: Tokai Corporation
    Inventor: Tomio Nitta
  • Patent number: 4878834
    Abstract: Disclosed is an improvement of gaslighter structure which has, in the hollow cylinder space at the rear portion of the housing, a push rod having hooks integrally connected to its opposite sides. The push rod is spring-biased upwards, and is pushed against the support piece of the cap, thereby permitting the cap to click shut and open. This arrangement permits necessary parts including a spring to be assembled in a cap pivot-and-latch simply by thrusting them in the rear space of the housing. This reduces the difficulty which otherwise, workers would encounter in assembling parts including a resilient element in a relatively small space. Also, the work of pivoting the cap to the housing can be advantageously separated from the work of assembling pivot-and-latch parts.
    Type: Grant
    Filed: April 28, 1989
    Date of Patent: November 7, 1989
    Assignee: Tokai Corporation
    Inventor: Tomio Nitta
  • Patent number: 4878833
    Abstract: Disclosed is an improved gaslighter structure which has a detachable support piece to be fitted in the cap and the housing for pivotally fixing the cap to the housing. This arrangement permits complete pivotal connection of the cap to the housing simply by thrusting the upper extension of the support piece into the rear end space of the cap and by thrusting the lower end of the support piece into the rear top inside of the housing until its opposite pivot pins are fitted in the counter sinks on the rear top inside of the housing.
    Type: Grant
    Filed: April 28, 1989
    Date of Patent: November 7, 1989
    Assignee: Tokai Corporation
    Inventor: Tomio Nitta
  • Patent number: 4863373
    Abstract: Tabletop gaslighter the parts are designed to facilitate the full automatic assembly of these parts into tabletop gaslighters. Parts can be put on each other in a predetermined order, and can be fixedly combined without using screws. The gas lighter comprises a casing, a gas cell having a flame valve fixed to one side of the gas cell and a longitudinal hole made at the other side of the gas cell, a hollow bracket to be clicked to the top of the gas cell with associated catch, supporting a flame adjusting ring and a valve operating lever, a piezoelectric unit to be inserted in the longitudinal hole of the gas cell, and a top closure to be fixed to the casing with associated catch to prevent the bracket, gas cell and other parts from slipping off from the casing.
    Type: Grant
    Filed: June 1, 1988
    Date of Patent: September 5, 1989
    Assignee: Tokai Corporation
    Inventor: Tomio Nitta
  • Patent number: 4859172
    Abstract: Piezoelectric lighter equipped with a rotatable hook-shaped safety lock is composed of a shank, a finger catch fixed to one end of the shank, a pivot fixed to the other end of the shank, a catch plate fixed to the pivot at the side opposite to the shank and extending substantially perpendicular to the shank, the catch plate having a longitudinal size larger than the width of the slot of a push cap which is put on a piezoelectric unit and a lateral size smaller than the width of the slot of the push cap. The safety lock is rotatably fixed on the top raised side of the casing at such a position that the catch plate may prevent the push cap from descending when the safety lock is put in its locking position in which the shank is vertical with the catch plate laid horizontal and at such a position that the catch plate may allow the push cap to descend when the safety lock is put in its unlocking position in which the shank is horizontal with the catch plate laid vertical.
    Type: Grant
    Filed: May 17, 1988
    Date of Patent: August 22, 1989
    Assignee: Tokai Corporation
    Inventor: Tomio Nitta
  • Patent number: 4838459
    Abstract: Disclosed is an improved aerosol structure whose partition-walls have passages in the vicinity of the bottom of container, thereby permitting its compartments to communicate with each other. In use the liquid under pressure is supplied to the outlet of aerosol from all compartments until they have been completely exhausted. The bottomless aerosol body and bottom closure are made of synthetic resin. Advantageously the bottom closure may be made of a transparent synthetic resin, thereby permitting a check on the remaining amount of liquid in the container.
    Type: Grant
    Filed: January 20, 1988
    Date of Patent: June 13, 1989
    Assignee: Tokai Corporation
    Inventor: Tomio Nitta
  • Patent number: 4811868
    Abstract: A valve for aerosol container to dispense a given amount of aerosol from an associated aerosol tank, comprising a base solid providing a valve chamber and a valve stem slidably fitted and upwardly biased by a spring in the chamber. An inlet is made on the bottom of the chamber thereby permitting injection of aerosol from the associated aerosol tank. The valve stem provides a longitudinal channel and an outlet communicating the channel with the valve chamber, and a valve head fixed to the bottom end. A valve ring fitted at the upper side of the chamber in air-tight fashion shutting the outlet all the time. Whereby on depression of the valve stem, the valve ring is yieldingly bent for opening the outlet of the valve stem, thereby allowing a predetermined amount of aerosol to flow out of the valve chamber and eject from the longitudinal channel of the valve stem while shutting the inlet on the bottom of the chamber with the valve head of the valve stem.
    Type: Grant
    Filed: August 27, 1987
    Date of Patent: March 14, 1989
    Assignee: Tokai Corporation
    Inventor: Tomio Nitta
  • Patent number: D303758
    Type: Grant
    Filed: December 11, 1986
    Date of Patent: October 3, 1989
    Assignee: Tokai Corporation
    Inventor: Tomio Nitta
  • Patent number: D304677
    Type: Grant
    Filed: November 3, 1986
    Date of Patent: November 21, 1989
    Assignee: Tokai Corporation
    Inventor: Tomio Nitta
  • Patent number: D305462
    Type: Grant
    Filed: June 23, 1987
    Date of Patent: January 9, 1990
    Assignee: Tokai Corporation
    Inventor: Tomio Nitta
  • Patent number: D306137
    Type: Grant
    Filed: December 11, 1986
    Date of Patent: February 20, 1990
    Assignee: Tokai Corporation
    Inventor: Tomio Nitta
  • Patent number: D307061
    Type: Grant
    Filed: June 23, 1987
    Date of Patent: April 3, 1990
    Assignee: Tokai Corporation
    Inventor: Tomio Nitta
  • Patent number: D307062
    Type: Grant
    Filed: June 23, 1987
    Date of Patent: April 3, 1990
    Assignee: Tokai Corporation
    Inventor: Tomio Nitta
  • Patent number: D308162
    Type: Grant
    Filed: March 3, 1987
    Date of Patent: May 29, 1990
    Assignee: Tokai Corporation
    Inventor: Tomio Nitta