Patents by Inventor Sundar Raj Dore Vasudevan
Sundar Raj Dore Vasudevan 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).
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Patent number: 11885151Abstract: A keycam assembly including a rotatable member, a stem, a locking member coupled to the stem for joint longitudinal movement therewith, and a cam driver. The rotatable member includes an aperture. A proximal end portion of the stem is rotatably seated in the rotatable member and defines a cam track. The locking member extends between the aperture and the cam track. The cam track includes a first passage including a locking pocket, a second passage including an unlocking pocket, a first ramped passage including a locking ramp extending from the second passage to the locking pocket, and a second ramped passage including an unlocking ramp extending from the first passage to the unlocking pocket. Relative rotation of the rotatable member and the stem causes the cam driver to travel along the track to thereby cause movement of the locking member between a locking position and an unlocking position.Type: GrantFiled: March 22, 2022Date of Patent: January 30, 2024Assignee: Schlage Lock Company LLCInventors: Pradeepkumar Balasubramaniam, Harikrishnan Mannattil, Sundar Raj Dore Vasudevan
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Publication number: 20230313585Abstract: An exemplary modular hold-open device is configured for use with a door closer comprising a body, a pinion rotatably mounted to the body, and an armature connected with the pinion. The modular hold-open device is configured to be mounted to the door closer, to selectively prevent rotation of the pinion by exerting on the pinion a resistive torque in a door-opening direction, and to cease exerting the resistive torque in response to a door-closing torque on the pinion exceeding a threshold torque to thereby permit rotation of the pinion in the door-closing direction.Type: ApplicationFiled: December 6, 2022Publication date: October 5, 2023Inventors: Yong K. Lacy, Akhil Ramesh Hamsagar, Adithya Gangadhar Shetty, Vijayakumar Mani, Sundar Raj Dore Vasudevan, David V. Toloday, Kanagaraj Shanmugam
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Patent number: 11732505Abstract: An illustrative motor drive assembly is configured for use in a lockset comprising a case, a longitudinally movable link, and a catch configured to move among a locking position and an unlocking position in response to longitudinal movement of the link. The illustrative motor drive assembly includes a longitudinally extending shaft comprising a worm, a motor operable to rotate the shaft, a driver engaged with the worm, and a longitudinally extending spring. The spring is not directly engaged with the worm, and includes a first end coupled with the driver and a second end connectable with the link. Engagement between the worm and driver is configured to longitudinally move the driver in response to rotation of the shaft.Type: GrantFiled: November 16, 2021Date of Patent: August 22, 2023Assignee: Schlage Lock Company LLCInventors: Sundar Raj Dore Vasudevan, Dilip Bangaru, Adam M. Litwinski
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Publication number: 20230009258Abstract: A keycam assembly including a rotatable member, a stem, a locking member coupled to the stem for joint longitudinal movement therewith, and a cam driver. The rotatable member includes an aperture. A proximal end portion of the stem is rotatably seated in the rotatable member and defines a cam track. The locking member extends between the aperture and the cam track. The cam track includes a first passage including a locking pocket, a second passage including an unlocking pocket, a first ramped passage including a locking ramp extending from the second passage to the locking pocket, and a second ramped passage including an unlocking ramp extending from the first passage to the unlocking pocket. Relative rotation of the rotatable member and the stem causes the cam driver to travel along the track to thereby cause movement of the locking member between a locking position and an unlocking position.Type: ApplicationFiled: March 22, 2022Publication date: January 12, 2023Inventors: Pradeepkumar Balasubramaniam, Harikrishnan Mannattil, Sundar Raj Dore Vasudevan
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Patent number: 11519212Abstract: An exemplary modular hold-open device is configured for use with a door closer comprising a body, a pinion rotatably mounted to the body, and an armature connected with the pinion. The modular hold-open device is configured to be mounted to the door closer, to selectively prevent rotation of the pinion by exerting on the pinion a resistive torque in a door-opening direction, and to cease exerting the resistive torque in response to a door-closing torque on the pinion exceeding a threshold torque to thereby permit rotation of the pinion in the door-closing direction.Type: GrantFiled: February 24, 2021Date of Patent: December 6, 2022Assignee: Schlage Lock Company LLCInventors: Yong K. Lacy, Akhil Ramesh Hamsagar, Adithya Gangadhar Shetty, Vijayakumar Mani, Sundar Raj Dore Vasudevan, David V. Toloday, Kanagaraj Shanmugam
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Publication number: 20220325558Abstract: An illustrative motor drive assembly is configured for use in a lockset comprising a case, a longitudinally movable link, and a catch configured to move among a locking position and an unlocking position in response to longitudinal movement of the link. The illustrative motor drive assembly includes a longitudinally extending shaft comprising a worm, a motor operable to rotate the shaft, a driver engaged with the worm, and a longitudinally extending spring. The spring is not directly engaged with the worm, and includes a first end coupled with the driver and a second end connectable with the link. Engagement between the worm and driver is configured to longitudinally move the driver in response to rotation of the shaft.Type: ApplicationFiled: November 16, 2021Publication date: October 13, 2022Inventors: Sundar Raj Dore Vasudevan, Dilip Bangaru, Adam M. Litwinski
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Publication number: 20220268072Abstract: An exemplary modular hold-open device is configured for use with a door closer comprising a body, a pinion rotatably mounted to the body, and an armature connected with the pinion. The modular hold-open device is configured to be mounted to the door closer, to selectively prevent rotation of the pinion by exerting on the pinion a resistive torque in a door-opening direction, and to cease exerting the resistive torque in response to a door-closing torque on the pinion exceeding a threshold torque to thereby permit rotation of the pinion in the door-closing direction.Type: ApplicationFiled: February 24, 2021Publication date: August 25, 2022Inventors: Yong K. Lacy, Akhil Ramesh Hamsagar, Adithya Gangadhar Shetty, Vijayakumar Mani, Sundar Raj Dore Vasudevan, David V. Toloday, Kanagaraj Shanmugam
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Publication number: 20220251887Abstract: An exemplary trim assembly includes a mounting bracket and a lever pivotably mounted to the mounting bracket. The lever is pivotable between an actuated position and a deactuated position, and is biased toward the deactuated position. A bumper is mounted to the mounting bracket and engages the lever when the lever is in the deactuated position.Type: ApplicationFiled: September 21, 2021Publication date: August 11, 2022Inventors: Bhargav Yalamati, Steven Verderaime, Adam M. Litwinski, Sundar Raj Dore Vasudevan
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Patent number: 11280109Abstract: A keycam assembly including a rotatable member, a stem, a locking member coupled to the stem for joint longitudinal movement therewith, and a cam driver. The rotatable member includes an aperture. A proximal end portion of the stem is rotatably seated in the rotatable member and defines a cam track. The locking member extends between the aperture and the cam track. The cam track includes a first passage including a locking pocket, a second passage including an unlocking pocket, a first ramped passage including a locking ramp extending from the second passage to the locking pocket, and a second ramped passage including an unlocking ramp extending from the first passage to the unlocking pocket. Relative rotation of the rotatable member and the stem causes the cam driver to travel along the track to thereby cause movement of the locking member between a locking position and an unlocking position.Type: GrantFiled: February 7, 2019Date of Patent: March 22, 2022Assignee: Schlage Lock Company LLCInventors: Pradeepkumar Balasubramaniam, Harikrishnan Mannattil, Sundar Raj Dore Vasudevan
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Patent number: 11174659Abstract: An illustrative motor drive assembly is configured for use in a lockset comprising a case, a longitudinally movable link, and a catch configured to move among a locking position and an unlocking position in response to longitudinal movement of the link. The illustrative motor drive assembly includes a longitudinally extending shaft comprising a worm, a motor operable to rotate the shaft, a driver engaged with the worm, and a longitudinally extending spring. The spring is not directly engaged with the worm, and includes a first end coupled with the driver and a second end connectable with the link. Engagement between the worm and driver is configured to longitudinally move the driver in response to rotation of the shaft.Type: GrantFiled: December 26, 2017Date of Patent: November 16, 2021Assignee: Schlage Lock Company LLCInventors: Sundar Raj Dore Vasudevan, Dilip Bangaru, Adam M. Litwinski
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Patent number: 11124996Abstract: An exemplary trim assembly includes a mounting bracket and a lever pivotably mounted to the mounting bracket. The lever is pivotable between an actuated position and a deactuated position, and is biased toward the deactuated position. A bumper is mounted to the mounting bracket and engages the lever when the lever is in the deactuated position.Type: GrantFiled: August 27, 2018Date of Patent: September 21, 2021Assignee: Schlage Lock Company LLCInventors: Bhargav Yalamati, Steven Verderaime, Adam M. Litwinski, Sundar Raj Dore Vasudevan
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Publication number: 20200256087Abstract: A keycam assembly including a rotatable member, a stem, a locking member coupled to the stem for joint longitudinal movement therewith, and a cam driver. The rotatable member includes an aperture. A proximal end portion of the stem is rotatably seated in the rotatable member and defines a cam track. The locking member extends between the aperture and the cam track. The cam track includes a first passage including a locking pocket, a second passage including an unlocking pocket, a first ramped passage including a locking ramp extending from the second passage to the locking pocket, and a second ramped passage including an unlocking ramp extending from the first passage to the unlocking pocket. Relative rotation of the rotatable member and the stem causes the cam driver to travel along the track to thereby cause movement of the locking member between a locking position and an unlocking position.Type: ApplicationFiled: February 7, 2019Publication date: August 13, 2020Inventors: Pradeepkumar Balasubramaniam, Harikrishnan Mannattil, Sundar Raj Dore Vasudevan
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Patent number: 10676963Abstract: An apparatus and method is disclosed for electronic locks with a selectable power off function. The electronic lock includes an electronic controller disposed within a lock housing and operable to control a state of the lock between locked and unlocked positions. An electronic actuator electrically coupled to the controller is movable between first and second positions corresponding to a locked position and an unlocked position of the lock, respectively. The electronic lock further includes at least one electrical energy storage device and a selector switch coupled to the controller to define a desired state of the lock between one of an electrically locked (EL) and an electrically unlocked (EU) state in an electric power off condition.Type: GrantFiled: November 20, 2018Date of Patent: June 9, 2020Assignee: Schlage Lock Company LLCInventors: Sundar Raj Dore Vasudevan, Dilip Bangaru, Adam M. Litwinski, William B. Ainley, Russell L. Steiner, Michelle Vickrey
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Publication number: 20200063470Abstract: An exemplary trim assembly includes a mounting bracket and a lever pivotably mounted to the mounting bracket. The lever is pivotable between an actuated position and a deactuated position, and is biased toward the deactuated position. A bumper is mounted to the mounting bracket and engages the lever when the lever is in the deactuated position.Type: ApplicationFiled: August 27, 2018Publication date: February 27, 2020Inventors: Bhargav Yalamati, Steven Verderaime, Adam M. Litwinski, Sundar Raj Dore Vasudevan
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Patent number: 10364592Abstract: A locking assembly including first and second hubs rotatably mounted in a case, a latch assembly which retracts in response to rotation of either of the hubs, and a locking member which selectively prevents rotation of at least one of the hubs. A sensor assembly is associated with at least one of the hubs, and is configured to transmit a signal in response to rotation of the at least one hub.Type: GrantFiled: December 26, 2017Date of Patent: July 30, 2019Assignee: Schlage Lock Company LLCInventors: Sundar Raj Dore Vasudevan, Dilip Bangaru, Adam Michael Litwinski, Allen Madrid
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Publication number: 20190226236Abstract: An apparatus and method is disclosed for electronic locks with a selectable power off function. The electronic lock includes an electronic controller disposed within a lock housing and operable to control a state of the lock between locked and unlocked positions. An electronic actuator electrically coupled to the controller is movable between first and second positions corresponding to a locked position and an unlocked position of the lock, respectively. The electronic lock further includes at least one electrical energy storage device and a selector switch coupled to the controller to define a desired state of the lock between one of an electrically locked (EL) and an electrically unlocked (EU) state in an electric power off condition.Type: ApplicationFiled: November 20, 2018Publication date: July 25, 2019Inventors: Sundar Raj Dore Vasudevan, Dilip Bangaru, Adam M. Litwinski, William B. Ainley, Russell L. Steiner, Michelle Vickrey
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Publication number: 20180119452Abstract: An illustrative motor drive assembly is configured for use in a lockset comprising a case, a longitudinally movable link, and a catch configured to move among a locking position and an unlocking position in response to longitudinal movement of the link. The illustrative motor drive assembly includes a longitudinally extending shaft comprising a worm, a motor operable to rotate the shaft, a driver engaged with the worm, and a longitudinally extending spring. The spring is not directly engaged with the worm, and includes a first end coupled with the driver and a second end connectable with the link. Engagement between the worm and driver is configured to longitudinally move the driver in response to rotation of the shaft.Type: ApplicationFiled: December 26, 2017Publication date: May 3, 2018Inventors: Sundar Raj Dore Vasudevan, Dilip Bangaru, Adam M. Litwinski
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Publication number: 20180119450Abstract: A locking assembly including first and second hubs rotatably mounted in a case, a latch assembly which retracts in response to rotation of either of the hubs, and a locking member which selectively prevents rotation of at least one of the hubs. A sensor assembly is associated with at least one of the hubs, and is configured to transmit a signal in response to rotation of the at least one hub.Type: ApplicationFiled: December 26, 2017Publication date: May 3, 2018Inventors: Sundar Raj Dore Vasudevan, Dilip Bangaru, Adam Michael Litwinski, Allen Madrid
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Patent number: 9850685Abstract: An illustrative motor drive assembly is configured for use in a lockset comprising a case, a longitudinally movable link, and a catch configured to move among a locking position and an unlocking position in response to longitudinal movement of the link. The illustrative motor drive assembly includes a longitudinally extending shaft comprising a worm, a motor operable to rotate the shaft, a driver engaged with the worm, and a longitudinally extending spring. The spring is not directly engaged with the worm, and includes a first end coupled with the driver and a second end connectable with the link. Engagement between the worm and driver is configured to longitudinally move the driver in response to rotation of the shaft.Type: GrantFiled: September 3, 2014Date of Patent: December 26, 2017Assignee: Schlage Lock Company LLCInventors: Sundar Raj Dore Vasudevan, Dilip Bangaru, Adam Michael Litwinski
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Patent number: 9850684Abstract: A locking assembly including first and second hubs rotatably mounted in a case, a latch assembly which retracts in response to rotation of either of the hubs, and a locking member which selectively prevents rotation of at least one of the hubs. A sensor assembly is associated with at least one of the hubs, and is configured to transmit a signal in response to rotation of the at least one hub.Type: GrantFiled: July 17, 2014Date of Patent: December 26, 2017Assignee: Schlage Lock Company LLCInventors: Sundar Raj Dore Vasudevan, Dilip Bangaru, Adam Michael Litwinski, Allen Madrid