Patents by Inventor Suresh Dharmaraj

Suresh Dharmaraj 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: 11603290
    Abstract: An illustrative example elevator door interlock includes a base, a plurality of interlock bumpers supported on the base, and a latch supported on the base for movement relative to the base between a door locking position and a released position. The plurality of interlock bumpers are supported on the base with a gap between the plurality of interlock bumpers. Each of the interlock bumpers includes a contact surface configured to contact at least one vane supported on an elevator car door. Each of the interlock bumpers remains rotationally fixed relative to the base. The latch includes a latch bumper that is situated relative to the gap such that the at least one vane contacts the latch bumper and urges the latch into the released position when the at least one vane is at least partially in the gap.
    Type: Grant
    Filed: September 21, 2021
    Date of Patent: March 14, 2023
    Assignee: OTIS ELEVATOR COMPANY
    Inventors: Yunyi Wang, Suresh Dharmaraj
  • Publication number: 20220024725
    Abstract: An illustrative example elevator door interlock includes a base, a plurality of interlock bumpers supported on the base, and a latch supported on the base for movement relative to the base between a door locking position and a released position. The plurality of interlock bumpers are supported on the base with a gap between the plurality of interlock bumpers. Each of the interlock bumpers includes a contact surface configured to contact at least one vane supported on an elevator car door. Each of the interlock bumpers remains rotationally fixed relative to the base. The latch includes a latch bumper that is situated relative to the gap such that the at least one vane contacts the latch bumper and urges the latch into the released position when the at least one vane is at least partially in the gap.
    Type: Application
    Filed: September 21, 2021
    Publication date: January 27, 2022
    Inventors: Yunyi WANG, Suresh DHARMARAJ
  • Patent number: 11155444
    Abstract: An illustrative example elevator door interlock includes a base, a plurality of interlock bumpers supported on the base, and a latch supported on the base for movement relative to the base between a door locking position and a released position. The plurality of interlock bumpers are supported on the base with a gap between the plurality of interlock bumpers. Each of the interlock bumpers includes a contact surface configured to contact at least one vane supported on an elevator car door. Each of the interlock bumpers remains rotationally fixed relative to the base. The latch includes a latch bumper that is situated relative to the gap such that the at least one vane contacts the latch bumper and urges the latch into the released position when the at least one vane is at least partially in the gap.
    Type: Grant
    Filed: May 1, 2018
    Date of Patent: October 26, 2021
    Assignee: OTIS ELEVATOR COMPANY
    Inventors: Yunyi Wang, Suresh Dharmaraj
  • Publication number: 20190337765
    Abstract: An illustrative example elevator door interlock includes a base, a plurality of interlock bumpers supported on the base, and a latch supported on the base for movement relative to the base between a door locking position and a released position. The plurality of interlock bumpers are supported on the base with a gap between the plurality of interlock bumpers. Each of the interlock bumpers includes a contact surface configured to contact at least one vane supported on an elevator car door. Each of the interlock bumpers remains rotationally fixed relative to the base. The latch includes a latch bumper that is situated relative to the gap such that the at least one vane contacts the latch bumper and urges the latch into the released position when the at least one vane is at least partially in the gap.
    Type: Application
    Filed: May 1, 2018
    Publication date: November 7, 2019
    Inventors: Yunyi WANG, Suresh DHARMARAJ
  • Patent number: 10322910
    Abstract: A door coupling assembly for an elevator system. The coupling assembly includes a first vane, including a first surface extending longitudinally vertically to the elevator car door and a second vane, including a second surface and a third surface extending longitudinally vertically in parallel with the first vane; wherein the second surface is laterally spaced to the first surface by a first vane length, and the third surface is laterally spaced to the first surface by a second vane length.
    Type: Grant
    Filed: January 4, 2017
    Date of Patent: June 18, 2019
    Assignee: OTIS ELEVATOR COMPANY
    Inventor: Suresh Dharmaraj
  • Publication number: 20170190547
    Abstract: A door coupling assembly for an elevator system. The coupling assembly includes a first vane, including a first surface extending longitudinally vertically to the elevator car door and a second vane, including a second surface and a third surface extending longitudinally vertically in parallel with the first vane; wherein the second surface is laterally spaced to the first surface by a first vane length, and the third surface is laterally spaced to the first surface by a second vane length.
    Type: Application
    Filed: January 4, 2017
    Publication date: July 6, 2017
    Inventor: Suresh Dharmaraj
  • Publication number: 20090145061
    Abstract: An elevator hoistway entrance (20) invention includes a snap-fit connection (38) that secures a first hoistway entrance member (32, 40) to a second hoistway entrance member (34, 42) in a desired structural relation. In disclosed embodiments, the snap-fit connection (38) includes at least one receiver (56) and at least one securing member (44) that is at least partially received in the receiver (56) in a first position and is moveable into a second position to secure the first hoistway entrance member (32, 40) to the second hoistway entrance member (34, 42). The securing member (44) is moved in a first direction (66) into an insertion portion (60) of the receiver (56) and then moved into a securing portion (62) to secure the first hoistway entrance member (40) to the second hoistway entrance member (42).
    Type: Application
    Filed: January 6, 2005
    Publication date: June 11, 2009
    Inventors: Ashok Kalhan, Suresh Dharmaraj