Patents by Inventor Shivanand Sankaran

Shivanand Sankaran 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).

  • Publication number: 20240360885
    Abstract: This shock absorber includes a cylinder having an inner chamber; a cage body partitioning the inner chamber into first and second chambers, and includes a first passage allowing communication between the first and second chambers, a first seat part, a second passage allowing communication between the first and second chambers, and a second seat part. A first valve which is a first valve coming into contact with the first seat part to close the first passage and being separated from the first seat part to open the first passage, and in which a communication hole communicating with the second passage is formed. A second valve comes into contact with the second seat part to close the second passage and is separated from the second seat part to open the second passage. A passage adjusting disc is provided between the first valve and the cage body.
    Type: Application
    Filed: April 27, 2023
    Publication date: October 31, 2024
    Inventors: Markus STEEB, Shivanand SANKARAN, Andrew Feldkamp
  • Patent number: 12110945
    Abstract: A damper includes a piston arranged in sliding engagement inside a pressure tube. The piston divides the pressure tube into a first working chamber and a second working chamber. A hydraulic compression stop assembly is positioned within the second working chamber and includes a plunger arranged in sliding engagement with a sleeve. The plunger includes a bumper cavity having a side wall. The bumper cavity extends a cavity depth from an end face of the plunger. The bumper cavity is in receipt of a compliant bumper. The bumper includes a bumper height greater than the cavity depth such that a portion of the bumper protrudes from the bumper cavity. The protruding bumper portion limits a maximum amount the bumper may be compressed before the sidewall is loaded by one of the piston and a piston rod.
    Type: Grant
    Filed: November 30, 2023
    Date of Patent: October 8, 2024
    Assignee: Tenneco Automotive Operating Company Inc.
    Inventors: Shivanand Sankaran, Wojciech Weglorz, Damian Slawik, Daniel Buczkowski, Thomas P. Mallin
  • Publication number: 20240309933
    Abstract: This shock absorber includes a tube, a piston rod having one end portion in an axial direction disposed in the tube and the other end portion in the axial direction disposed outside the tube, a piston assembly connected to an intermediate position of the piston rod in the axial direction, dividing an inner chamber into a first chamber on the other end portion side of the piston rod and a second chamber on the one end portion side of the piston rod, and configured to generate a damping force when the piston rod moves, and a damping force increasing mechanism increasing the damping force when the piston assembly moves to the second chamber side. The damping force increasing mechanism includes a first cylinder connected to the one end portion side of the piston rod with respect to the piston assembly, and a partition piston entering inside of the first cylinder.
    Type: Application
    Filed: March 15, 2023
    Publication date: September 19, 2024
    Inventors: Jordan TRUITT, Sean LUNDBERG, Yohei KATAYAMA, Takashi TSUKAHARA, Shivanand SANKARAN
  • Publication number: 20240102530
    Abstract: This shock absorber includes a first valve assembly connected to one end of a tube in an axial direction, a piston assembly dividing an inner chamber of the tube into a first chamber and a second chamber, a piston rod extending from the tube through the first chamber with the piston assembly connected to an intermediate position in the axial direction, a cup provided in the second chamber, and a second valve assembly disposed in the second chamber to be connected to the piston rod and configured to enter and exit from the cup. The cup includes a sleeve disposed in the second chamber with a gap between itself and the tube in a radial direction, and a base adapter fixed to the sleeve by press fitting and provided between the sleeve and the first valve assembly.
    Type: Application
    Filed: September 28, 2022
    Publication date: March 28, 2024
    Inventors: Shivanand SANKARAN, Sean LUNDBERG, Jordan TRUITT
  • Publication number: 20240093753
    Abstract: A damper includes a piston arranged in sliding engagement inside a pressure tube. The piston divides the pressure tube into a first working chamber and a second working chamber. A hydraulic compression stop assembly is positioned within the second working chamber and includes a plunger arranged in sliding engagement with a sleeve. The plunger includes a bumper cavity having a side wall. The bumper cavity extends a cavity depth from an end face of the plunger. The bumper cavity is in receipt of a compliant bumper. The bumper includes a bumper height greater than the cavity depth such that a portion of the bumper protrudes from the bumper cavity. The protruding bumper portion limits a maximum amount the bumper may be compressed before the sidewall is loaded by one of the piston and a piston rod.
    Type: Application
    Filed: November 30, 2023
    Publication date: March 21, 2024
    Inventors: Shivanand Sankaran, Wojciech Weglorz, Damian Slawik, Daniel Buczkowski, Thomas P. Mallin
  • Patent number: 11867254
    Abstract: A damper having a pressure tube, a piston, and a hydraulic compression stop assembly. The piston is arranged in sliding engagement inside the pressure tube. The piston divides the pressure tube into a first working chamber and a second working chamber and the piston is coupled to a piston rod that extends through the first working chamber. The hydraulic compression stop assembly is positioned in the second working chamber. The hydraulic compression stop assembly includes a sleeve, a plunger, a biasing member, and a pressure relief valve. The plunger is arranged in sliding engagement with the sleeve and can therefore move between an extended position and a retracted position. The biasing member biases the plunger towards the extended position and the pressure relief valve relieves excessive fluid pressure inside the hydraulic compression stop assembly.
    Type: Grant
    Filed: December 11, 2020
    Date of Patent: January 9, 2024
    Assignee: Tenneco Automotive Operating Company, Inc.
    Inventors: Shivanand Sankaran, Wojciech Weglorz, Damian Slawik, Rafal Psota, Daniel Buczkowski, Thomas P. Mallin
  • Patent number: 11047445
    Abstract: A damper includes a pressure tube defining a first end and a second end opposite to the first end. The pressure tube includes a primary section extending from the first end and a reduced-diameter section extending from the second end. The damper includes a primary piston slidably disposed within the pressure tube. The primary piston defines a rebound chamber and a compression chamber within the pressure tube. The damper further includes a secondary piston movable with the primary piston. The damper includes a sleeve connected to the pressure tube and surrounding the reduced-diameter section. The damper also includes a base valve. The pressure tube and the sleeve define an intermediate chamber therebetween. The pressure tube further defines at least one tube opening to fluidly communicate the compression chamber with the intermediate chamber.
    Type: Grant
    Filed: July 18, 2019
    Date of Patent: June 29, 2021
    Assignee: Tenneco Automotive Operating Company Inc.
    Inventor: Shivanand Sankaran
  • Publication number: 20210123495
    Abstract: A damper having a pressure tube, a piston, and a hydraulic compression stop assembly. The piston is arranged in sliding engagement inside the pressure tube. The piston divides the pressure tube into a first working chamber and a second working chamber and the piston is coupled to a piston rod that extends through the first working chamber. The hydraulic compression stop assembly is positioned in the second working chamber. The hydraulic compression stop assembly includes a sleeve, a plunger, a biasing member, and a pressure relief valve. The plunger is arranged in sliding engagement with the sleeve and can therefore move between an extended position and a retracted position. The biasing member biases the plunger towards the extended position and the pressure relief valve relieves excessive fluid pressure inside the hydraulic compression stop assembly.
    Type: Application
    Filed: December 11, 2020
    Publication date: April 29, 2021
    Inventors: Shivanand SANKARAN, Wojciech WEGLORZ, Damian SLAWIK, Rafal PSOTA, Daniel BUCZKOWSKI, Thomas P. MALLIN
  • Patent number: 10962081
    Abstract: A damper includes a pressure tube and a piston defining a rebound chamber and a compression chamber within the pressure tube. The damper further includes an adapter attached to the pressure tube. The damper includes a retainer slidably disposed within the pressure tube. The retainer and the adapter define an end chamber therebetween within the pressure tube. The damper also includes a cup movably disposed within the pressure tube between the retainer and the adapter. The damper further includes a tubular member disposed adjacent to the cup and attached to the adapter. The tubular member includes at least one through aperture. The damper includes a base valve attached to the adapter. The damper also includes a first spring disposed between the retainer and the cup and a second spring disposed between cup and the adapter.
    Type: Grant
    Filed: September 16, 2019
    Date of Patent: March 30, 2021
    Assignee: Tenneco Automotive Operating Company Inc.
    Inventors: Shivanand Sankaran, Wojciech Weglorz
  • Publication number: 20210018059
    Abstract: A damper includes a pressure tube defining a first end and a second end opposite to the first end. The pressure tube includes a primary section extending from the first end and a reduced-diameter section extending from the second end. The damper includes a primary piston slidably disposed within the pressure tube. The primary piston defines a rebound chamber and a compression chamber within the pressure tube. The damper further includes a secondary piston movable with the primary piston. The damper includes a sleeve connected to the pressure tube and surrounding the reduced-diameter section. The damper also includes a base valve. The pressure tube and the sleeve define an intermediate chamber therebetween. The pressure tube further defines at least one tube opening to fluidly communicate the compression chamber with the intermediate chamber.
    Type: Application
    Filed: July 18, 2019
    Publication date: January 21, 2021
    Inventor: Shivanand Sankaran
  • Publication number: 20200011395
    Abstract: A damper includes a pressure tube and a piston defining a rebound chamber and a compression chamber within the pressure tube. The damper further includes an adapter attached to the pressure tube. The damper includes a retainer slidably disposed within the pressure tube. The retainer and the adapter define an end chamber therebetween within the pressure tube. The damper also includes a cup movably disposed within the pressure tube between the retainer and the adapter. The damper further includes a tubular member disposed adjacent to the cup and attached to the adapter. The tubular member includes at least one through aperture. The damper includes a base valve attached to the adapter. The damper also includes a first spring disposed between the retainer and the cup and a second spring disposed between cup and the adapter.
    Type: Application
    Filed: September 16, 2019
    Publication date: January 9, 2020
    Inventors: Shivanand Sankaran, Wojciech Weglorz