Patents by Inventor Umesh Chandra Borah

Umesh Chandra Borah 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).

  • Sealing device useful for providing air-seal self-controlled discharge of product from a process equipment such as a vertical shaft kiln
    Patent number: 5984671
    Abstract: This invention relates to a sealing device useful for attachment to a process equipment such as vertical shaft kiln (VSK) for providing air-seal self-controlled discharge of product from the said equipment, which comprises a chamber (1) having at its top end an inlet (3) with flange (2) for fitting to the discharge chute of a process equipment and a discharge outlet (16) at its bottom end, the said chamber being provided with a partition wall (4) having an inlet gate (5) & a discharge gate (6) hinged to its top & bottom respectively, the free ends of the hinged gates being such as to sit on means (7) and (8) to provide air seal, means (9,10,11,12,13,14,15,17,18,19,20& SOL) being provided for simultaneous operation of the inlet & discharge gates, the said means [9(a) & (b) and SOL] being connected to a control circuit for actuating the movement of the gates, the discharge outlet being fitted onto a volumetric discharge unit (21) provided with means (22) for measuring the quantity of product discharge.
    Type: Grant
    Filed: June 7, 1996
    Date of Patent: November 16, 1999
    Assignee: Council of Scientific & Industrial Research
    Inventors: Dilip Kumar Dutta, Wahid Ahmed, Pranab Barkakati, Jayanta Jyoti Bora, Subodh Chandra Kalita, Ajoy Barkataki, Prabhat Chandra Goswami, Umesh Chandra Borah
  • Vertical shaft kiln
    Patent number: 5738511
    Abstract: This invention relates to a a vertical shaft kiln (VSK) useful for manufacturing cement and other allied products, which comprises a rotary nodule feeder for feeding the raw materials, fitted above the kiln bed for uniform distribution of nodules of the raw materials, an air blower being placed at the base of the kiln for feeding air through a duct to a common air header having a plurality of outlet air ducts, the air duct being connected to an air cone placed inside an armoured shell of the VSK, the said air cone being provided with a grate assembly having a plurality of peripheral air slots, the air duct being connected to an air box placed above the said armoured shell, the said air box having perforations on the inside vertical wall, the air duct being connected to an air header having air entry nozzles placed in such a manner so as to supply air just below the sintering zone of the VSK, the air duct being connected to the chimney of the VSK, the said chimney being provided with a butterfly valve below th
    Type: Grant
    Filed: June 7, 1996
    Date of Patent: April 14, 1998
    Assignee: Council of Scientific & Industrial Research
    Inventors: Umesh Chandra Borah, Pranab Barkakati, Dilip Kumar Dutta, Jayanta Jyoti Bora, Paran Phukan, Nc Dey, Wahid Ahmed, Subodh Chandra Kalita, Dipak Bordoloi, Ajit Baruah