Patents by Inventor Debashish Mazumdar

Debashish Mazumdar 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: 6890681
    Abstract: A leak resistant automotive battery comprising a housing containing cells having filling plugs; a battery cover sealed to an opened top end of the housing and having filling holes overlying the respective cells; at least one partition wall provided in the battery cover to divide the battery cover into at least two vent chambers, each vent chamber overlying a set of the cells, to prevent flow of electrolyte from one set of cells to an adjacent set of cells when the battery is tilted; a common vent line in the battery cover connecting the spaces above the cells in each set of cells, each of the common vent line being sealed at one end and connected at its other end through a vent chamber to one end of each of parallel vent lines having at its other end a vent cap assembly which permits escape of vented gases from the cells in each set.
    Type: Grant
    Filed: July 11, 2002
    Date of Patent: May 10, 2005
    Assignees: Exide Industries Ltd., Shin-Kobe Electric Machinery Co., Ltd.
    Inventors: Surendra Kumar Mittal, Debashish Mazumdar, Partha Dasgupta
  • Patent number: 6881513
    Abstract: A leak retardant automotive battery includes a housing containing a plurality of cells that each have a filling plug and a battery cover closing the housing above the cells. The battery cover includes a central blockage that divides the housing into two compartments that each contain a set of cells. The cells in each compartment are connected by vent holes in the battery cover that are respectively connected to associated vent cap assemblies so as to separately vent each compartment through its associated vent cap assembly.
    Type: Grant
    Filed: June 25, 2002
    Date of Patent: April 19, 2005
    Assignees: Exide Industries Ltd., Shin-Kobe Electric Machinery Co., Ltd.
    Inventors: Partha Dasgupta, Subhradas Bandyapadhyayay, Debashish Mazumdar, Surendra Kumar Mittal
  • Patent number: 6686720
    Abstract: A vented-type leak-resistant motor cycle battery comprising a housing in which a plurality of cells are mounted, a battery cover sealed to an upper end of the housing in a liquid tight manner so that the battery cover overlies the cells each having a vent chamber, a filling hole and a filling plug and a vent chamber cover sealed to the battery cover in a liquid tight manner, the battery cover being provided with a vent line extending in a longitudinal direction of the battery cover in flow communication with the spaces above the cells and having an exit end tilted upwardly toward the outside and a vent cap assembly being fitted to the vent line at the tilted exit end.
    Type: Grant
    Filed: September 17, 2002
    Date of Patent: February 3, 2004
    Assignees: Exide Industries Ltd., Shin-Kobe Electric Machinery Co., Ltd.
    Inventors: Surendra Kumar Mittal, Debashish Mazumdar, Partha Dasgupta
  • Publication number: 20030059669
    Abstract: A vented-type leak-resistant motor cycle battery comprising a housing in which a plurality of cells are mounted, a battery cover sealed to an upper end of the housing in a liquid tight manner so that the battery cover overlies the cells each having a vent chamber, a filling hole and a filling plug and a vent chamber cover sealed to the battery cover in a liquid tight manner, the battery cover being provided with a vent line extending in a longitudinal direction of the battery cover in flow communication with the spaces above the cells and having an exit end tilted upwardly toward the outside and a vent cap assembly being fitted to the vent line at the tilted exit end.
    Type: Application
    Filed: September 17, 2002
    Publication date: March 27, 2003
    Inventors: Surendra Kumar Mittal, Debashish Mazumdar, Partha Dasgupta
  • Publication number: 20030017381
    Abstract: A leak resistant automotive battery comprising a housing containing cells having filling plugs; a battery cover sealed to an opened top end of the housing and having filling holes overlying the respective cells; at least one partition wall provided in the battery cover to divide the battery cover into at least two vent chambers, each vent chamber overlying a set of the cells, to prevent flow of electrolyte from one set of cells to an adjacent set of cells when the battery is tilted; a common vent line in the battery cover connecting the spaces above the cells in each set of cells, each of the common vent line being sealed at one end and connected at its other end through a vent chamber to one end of each of parallel vent lines having at its other end a vent cap assembly which permits escape of vented gases from the cells in each set.
    Type: Application
    Filed: July 11, 2002
    Publication date: January 23, 2003
    Inventors: Surendra Kumar Mittal, Debashish Mazumdar, Partha Dasgupta
  • Publication number: 20030013006
    Abstract: Leak retardant automotive battery comprising a housing for a plurality of cells housed therein and each having a filling plug and a battery cover provided onto the housing to overlie the cells and divided into two compartments by means of a central blockage, each compartment overlying a set of cells, each of vent lines connecting vent holes in the battery cover overlying each set of the cells so that the cells in each set are in communication with each other and being connected at its one end to the central blockage so as to isolate the two compartments; a vent cap assembly being provided at the other end of each of the vent lines for escape of vented gases.
    Type: Application
    Filed: June 25, 2002
    Publication date: January 16, 2003
    Inventors: Partha Dasgupta, Subhradas Bandyapadhyayay, Debashish Mazumdar, Surendra Kumar Mittal