Patents by Inventor Rangasami Sarat Chandra

Rangasami Sarat Chandra 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: 5337885
    Abstract: A travel monitor for a rectangular sludge conveyor having a plurality of scrapers attached to and driven by a pair of chains, each of which is formed in a closed loop having an upper run. A pair of detector sprockets independently engage and are driven by the upper runs. Switches positioned adjacent the sprockets create a series of pulses in response to their rotation. The phase difference between the series of pulses resulting from rotation of the sprockets is detected, and a misalignment alarm is activated when the phase difference exceeds a predetermined amount.
    Type: Grant
    Filed: March 31, 1993
    Date of Patent: August 16, 1994
    Assignee: FMC Corporation
    Inventors: Robert L. Mills, John C. Lodholz, Rangasami Sarat-Chandra, Franklin P. Orlando, Donald J. Christian
  • Patent number: 4008829
    Abstract: Apparatus is described for the controlled mixing of liquids in a predetermined ratio and is especially suitable for the dispensing of predetermined ratios of polyol and polyisocyanate liquids in the liquid injection molding of polyurethane articles. The ratio control is achieved by a master-slave velocity relationship between at least two metering pumps of the plunger or piston type which are velocity coupled and inject on a common programmed velocity profile that is fed into the pump control that is the master system. Each pump control system has a velocity feedback control loop (a closed loop system) and one signal into the slave automatic control system (typically the polyol system) is obtained in a suitable ratio from the feedback master automatic control system (typically the poly isocyanate system).
    Type: Grant
    Filed: August 13, 1975
    Date of Patent: February 22, 1977
    Assignee: Cincinnati Milacron, Inc.
    Inventors: Rangasami Sarat Chandra, Kirby Lee Stone
  • Patent number: 3984510
    Abstract: Method for the controlled mixing of liquids in a predetermined ratio and is especially suitable for the dispensing of predetermined ratios of polyol and polyisocyanate liquids in the liquid injection molding of polyurethane articles. The ratio control is achieved by a master-slave relationship between at least two metering pumps of the plunger or piston type which are position coupled and inject on a common programmed velocity profile (in the master system), but with each system controlled by an automatic velocity feedback control loop (a closed loop system) wherein the reference signal into the slave automatic control system (typically the polyol system) is obtained in a suitable ratio from the master automatic control system (typically the polyisocyanate system). The method includes continuing to drive the metering pumps past the time that mixing is cut off.
    Type: Grant
    Filed: June 13, 1975
    Date of Patent: October 5, 1976
    Assignee: Cincinnati Milacron, Inc.
    Inventors: Rangasami Sarat Chandra, Kirby Lee Stone