Patents by Inventor Janis Dumpis

Janis Dumpis 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).

  • Invertible multiple-pass ribbon cartridge having two capstans
    Patent number: 4496255
    Abstract: A ribbon cartridge for a serial printer includes a casing containing a supply reel, a take-up reel and a ribbon drive roller. A lower axial end of the drive roller is slotted to receive a drive shaft of a ribbon advance motor on the serial printer. The upper axial end of the drive roller is connected by a tension band to the upper end of the take-up reel shaft. The cartridge may be inverted by removing the tension band from the shafts of the drive roller and take-up reel, inverting the cartridge, and replacing the tension band on the shaft of the other reel and the shaft of a drive roller associated with the second reel.
    Type: Grant
    Filed: September 4, 1980
    Date of Patent: January 29, 1985
    Assignee: NEC Corporation
    Inventors: David R. Meintrup, Janis Dumpis
  • Automatic shut-off nozzle with lockable vapor relief valve
    Patent number: 4031930
    Abstract: A fuel dispensing nozzle has a diaphragm responsive to vacuum for shutting off the flow of fuel through the nozzle, the diaphragm chamber having a vent to atmosphere through a tube extending to the mouth of the nozzle spout and closeable by fuel in the tank being filled to cause vacuum to actuate the diaphragm and shut off the fuel flow through the nozzle, a valve in the vent tube, a piston for closing the vent tube valve in response to vapor pressure in the tank being filled, a vapor return conduit providing vapor communication between the interior of the tank being filled and the fuel source, the vent tube valve piston being exposed to vapor pressure in the vapor return conduit, whereby to shut off the flow of fuel through the nozzle when predetermined vapor pressure occurs in the tank being filled, and additional means holding the vent tube valve closed and closing the vapor return conduit to prevent vapor leakage from the fuel source except when the spout is inserted in the filler inlet of a tank, and ope
    Type: Grant
    Filed: February 9, 1976
    Date of Patent: June 28, 1977
    Assignee: Husky Corporation
    Inventors: Grenville G. Sutcliffe, Janis Dumpis
  • Fuel dispensing nozzle with automatic shut-off responsive to vapor pressure
    Patent number: 4016910
    Abstract: A fuel dispensing nozzle has a diaphragm responsive to vacuum for shutting off the flow of fuel through the nozzle, the diaphragm chamber normally being vented to atmosphere by a tube extending to the mouth of the spout and closable by fuel in the tank being filled to cause vacuum to actuate the diaphragm and shut off the fuel-flow through the nozzle, and a normally open valve in the vent tube, a piston for closing the vent tube valve in response to vapor pressure in the tank being filled, and conduit means providing vapor communication between the piston and the interior of the tank, whereby to shut off the flow of fuel through the nozzle when predetermined vapor pressure occurs in the tank being filled.
    Type: Grant
    Filed: September 4, 1975
    Date of Patent: April 12, 1977
    Assignee: Husky Corporation
    Inventors: Janis Dumpis, Grenville G. Sutcliffe