Patents by Inventor Subashchandra G. Rai

Subashchandra G. Rai 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: 11851911
    Abstract: An exemplary pushbutton mechanism is configured for use with a lockset including a spindle and a plunger extending into the spindle, and generally includes a first component, a second component, and a cam interface. The first component is configured for rotational coupling with the plunger and for axial coupling with the spindle, and is rotatable between a locking orientation and an unlocking orientation. The second component is configured for rotational coupling with the spindle and for axial movement relative to the first component and the spindle, and is axially movable between a depressed position and a projected position. The cam interface is configured to correlate rotation of the first component with axial displacement of the second component.
    Type: Grant
    Filed: February 1, 2022
    Date of Patent: December 26, 2023
    Assignee: Schlage Lock Company LLC
    Inventors: Adithya G. Shetty, Subashchandra G. Rai, Hassan Charan Kumar, Madhu Hulikere Siddaramaiah, Ravi Teja Naga Satya Tadepalli
  • Patent number: 11846133
    Abstract: An exemplary method relates to operating a door closer assembly including a closer body, a pinion rotatably mounted to the closer body, a motor including a motor shaft, and a bidirectional clutch connected between the pinion and the motor shaft. The method generally involves permitting, by the clutch, rotation of the pinion in each of a first direction and a second direction without transmitting rotation of the pinion in either direction to the motor shaft; sensing, with a sensor, a rotational position of the pinion; comparing, by a controller, the rotational position of the pinion with a desired rotational position; based upon the comparing, driving the motor to rotate the motor shaft; and by the clutch, coupling the motor shaft with the pinion in response to rotation of the motor shaft, thereby transmitting torque from the motor shaft to the pinion and urging the pinion toward the desired rotational position.
    Type: Grant
    Filed: October 12, 2021
    Date of Patent: December 19, 2023
    Assignee: Schlage Lock Company LLC
    Inventors: Brady Plummer, Subashchandra G. Rai, Brian C. Eickhoff, Benjamin L. Miller, Prajna Poojary
  • Publication number: 20220228401
    Abstract: An exemplary pushbutton mechanism is configured for use with a lockset including a spindle and a plunger extending into the spindle, and generally includes a first component, a second component, and a cam interface. The first component is configured for rotational coupling with the plunger and for axial coupling with the spindle, and is rotatable between a locking orientation and an unlocking orientation. The second component is configured for rotational coupling with the spindle and for axial movement relative to the first component and the spindle, and is axially movable between a depressed position and a projected position. The cam interface is configured to correlate rotation of the first component with axial displacement of the second component.
    Type: Application
    Filed: February 1, 2022
    Publication date: July 21, 2022
    Inventors: Adithya G. Shetty, Subashchandra G. Rai, Hassan Charan Kumar, Madhu Hulikere Siddaramaiah, Ravi Teja Naga Satya Tadepalli
  • Publication number: 20220170308
    Abstract: An exemplary method relates to operating a door closer assembly including a closer body, a pinion rotatably mounted to the closer body, a motor including a motor shaft, and a bidirectional clutch connected between the pinion and the motor shaft. The method generally involves permitting, by the clutch, rotation of the pinion in each of a first direction and a second direction without transmitting rotation of the pinion in either direction to the motor shaft; sensing, with a sensor, a rotational position of the pinion; comparing, by a controller, the rotational position of the pinion with a desired rotational position; based upon the comparing, driving the motor to rotate the motor shaft; and by the clutch, coupling the motor shaft with the pinion in response to rotation of the motor shaft, thereby transmitting torque from the motor shaft to the pinion and urging the pinion toward the desired rotational position.
    Type: Application
    Filed: October 12, 2021
    Publication date: June 2, 2022
    Inventors: Brady Plummer, Subashchandra G. Rai, Brian C. Eickhoff, Benjamin L. Miller, Prajna Poojary
  • Patent number: 11236526
    Abstract: An exemplary pushbutton mechanism is configured for use with a lockset including a spindle and a plunger extending into the spindle, and generally includes a first component, a second component, and a cam interface. The first component is configured for rotational coupling with the plunger and for axial coupling with the spindle, and is rotatable between a locking orientation and an unlocking orientation. The second component is configured for rotational coupling with the spindle and for axial movement relative to the first component and the spindle, and is axially movable between a depressed position and a projected position. The cam interface is configured to correlate rotation of the first component with axial displacement of the second component.
    Type: Grant
    Filed: December 13, 2019
    Date of Patent: February 1, 2022
    Assignee: Schlage Lock Company LLC
    Inventors: Adithya Gangadhar Shetty, Subashchandra G. Rai, Hassan Charan Kumar, Madhu Hulikere Siddaramaiah, Ravi Teja Naga Satya Tadepalli
  • Patent number: 11168504
    Abstract: An exemplary armature assembly is configured for use with a door closer comprising a pinion, and generally includes a first arm configured for rotational coupling with the pinion, a second arm pivotably coupled to the first arm at a pivot joint, and a hold-open mechanism. The hold-open mechanism generally includes a clutch having a decoupling and a coupling state, and an electromechanical driver operable to transition the clutch between the coupling state and the decoupling state. With the clutch in the decoupling state, a first torque is operable to cause relative pivoting of the arms. With the clutch in the coupling state, the first torque is inoperable to cause relative pivoting of the arms, and a second torque greater than the first torque is operable to cause relative pivoting of the arms.
    Type: Grant
    Filed: January 31, 2020
    Date of Patent: November 9, 2021
    Assignee: Schlage Lock Company LLC
    Inventors: Brian C. Eickhoff, Aditya Heblikar, Palraj Palanisamy, Brady Plummer, Dharam Deo Prasad, Ramakrishna Moorthy Andamuthu, Subashchandra G. Rai, Latha Ramesh, Vijayakumar Mani
  • Patent number: 11142939
    Abstract: An exemplary method relates to operating a door closer assembly including a closer body, a pinion rotatably mounted to the closer body, a motor including a motor shaft, and a bidirectional clutch connected between the pinion and the motor shaft. The method generally involves permitting, by the clutch, rotation of the pinion in each of a first direction and a second direction without transmitting rotation of the pinion in either direction to the motor shaft; sensing, with a sensor, a rotational position of the pinion; comparing, by a controller, the rotational position of the pinion with a desired rotational position; based upon the comparing, driving the motor to rotate the motor shaft; and by the clutch, coupling the motor shaft with the pinion in response to rotation of the motor shaft, thereby transmitting torque from the motor shaft to the pinion and urging the pinion toward the desired rotational position.
    Type: Grant
    Filed: December 13, 2019
    Date of Patent: October 12, 2021
    Assignee: Schlage Lock Company LLC
    Inventors: Brady Plummer, Subashchandra G. Rai, Brian C. Eickhoff, Benjamin L. Miller, Prajna Poojary
  • Patent number: 11105121
    Abstract: An exemplary credential input device includes a mounting plate, a pivot pad, a sensor, an input device, and a controller. The pivot pad is pivotably mounted to the mounting plate, is biased to a home position, and is operable to pivot to each of a plurality of pivoted positions. The sensor is mounted to the pivot pad such that the sensor moves with the pivot pad, and is configured to generate information relating to an orientation of the sensor. The input device operable to move the pivot pad from the home position to each of the plurality of pivoted positions, thereby altering the orientation of the sensor. The controller is in communication with the sensor, and is configured to determine an inputted code based upon information received from the sensor, to compare the inputted code to an authorized code, and to issue a command in response to the comparing.
    Type: Grant
    Filed: February 14, 2019
    Date of Patent: August 31, 2021
    Assignee: Schlage Lock Company LLC
    Inventors: Subashchandra G. Rai, Taukeer Ansari, Jineesh Kunnoth, Vishwas N. Moolimani
  • Publication number: 20210238904
    Abstract: An exemplary armature assembly is configured for use with a door closer comprising a pinion, and generally includes a first arm configured for rotational coupling with the pinion, a second arm pivotably coupled to the first arm at a pivot joint, and a hold-open mechanism. The hold-open mechanism generally includes a clutch having a decoupling and a coupling state, and an electromechanical driver operable to transition the clutch between the coupling state and the decoupling state. With the clutch in the decoupling state, a first torque is operable to cause relative pivoting of the arms. With the clutch in the coupling state, the first torque is inoperable to cause relative pivoting of the arms, and a second torque greater than the first torque is operable to cause relative pivoting of the arms.
    Type: Application
    Filed: January 31, 2020
    Publication date: August 5, 2021
    Inventors: Brian C. Eickhoff, Aditya Heblikar, Palraj Palanisamy, Brady Plummer, Dharam Deo Prasad, Ramakrishna Moorthy Andamuthu, Subashchandra G. Rai, Latha Ramesh, Vijayakumar Mani
  • Publication number: 20210180365
    Abstract: An exemplary pushbutton mechanism is configured for use with a lockset including a spindle and a plunger extending into the spindle, and generally includes a first component, a second component, and a cam interface. The first component is configured for rotational coupling with the plunger and for axial coupling with the spindle, and is rotatable between a locking orientation and an unlocking orientation. The second component is configured for rotational coupling with the spindle and for axial movement relative to the first component and the spindle, and is axially movable between a depressed position and a projected position. The cam interface is configured to correlate rotation of the first component with axial displacement of the second component.
    Type: Application
    Filed: December 13, 2019
    Publication date: June 17, 2021
    Inventors: Adithya Gangadhar Shetty, Subashchandra G. Rai, Hassan Charan Kumar, Madhu Hulikere Siddaramaiah, Ravi Teja Naga Satya Tadepalli
  • Publication number: 20210180389
    Abstract: An exemplary method relates to operating a door closer assembly including a closer body, a pinion rotatably mounted to the closer body, a motor including a motor shaft, and a bidirectional clutch connected between the pinion and the motor shaft. The method generally involves permitting, by the clutch, rotation of the pinion in each of a first direction and a second direction without transmitting rotation of the pinion in either direction to the motor shaft; sensing, with a sensor, a rotational position of the pinion; comparing, by a controller, the rotational position of the pinion with a desired rotational position; based upon the comparing, driving the motor to rotate the motor shaft; and by the clutch, coupling the motor shaft with the pinion in response to rotation of the motor shaft, thereby transmitting torque from the motor shaft to the pinion and urging the pinion toward the desired rotational position.
    Type: Application
    Filed: December 13, 2019
    Publication date: June 17, 2021
    Inventors: Brady Plummer, Subashchandra G. Rai, Brian C. Eickhoff, Benjamin L. Miller, Prajna Poojary
  • Publication number: 20210123280
    Abstract: An exemplary door control assembly includes a door control and an armature assembly. The door control includes a body and a pinion rotatably mounted to the body for rotation about a rotational axis. The pinion has a radially-outer periphery and a recess is formed in the radially-outer periphery. The armature assembly comprises an armature and a coupler. The armature is rotationally coupled with the pinion, and includes an opening in which the pinion is received. The coupler is movably mounted to the armature for movement between a coupling position and a decoupling position. With the coupler in the coupling position, the coupler projects into the recess and axially couples the armature and the pinion to prevent removal of the armature from the pinion. With the coupler in the decoupling position, the coupler axially decouples the armature and the pinion to permit removal of the armature from the pinion.
    Type: Application
    Filed: October 28, 2019
    Publication date: April 29, 2021
    Inventors: Brian C. Eickhoff, Nagesh Varadaraju, David V. Toloday, Subashchandra G. Rai, Chad Eagin, Benaka Gireesha
  • Publication number: 20200263449
    Abstract: An exemplary credential input device includes a mounting plate, a pivot pad, a sensor, an input device, and a controller. The pivot pad is pivotably mounted to the mounting plate, is biased to a home position, and is operable to pivot to each of a plurality of pivoted positions. The sensor is mounted to the pivot pad such that the sensor moves with the pivot pad, and is configured to generate information relating to an orientation of the sensor. The input device operable to move the pivot pad from the home position to each of the plurality of pivoted positions, thereby altering the orientation of the sensor. The controller is in communication with the sensor, and is configured to determine an inputted code based upon information received from the sensor, to compare the inputted code to an authorized code, and to issue a command in response to the comparing.
    Type: Application
    Filed: February 14, 2019
    Publication date: August 20, 2020
    Inventors: Subashchandra G. Rai, Taukeer Ansari, Jineesh Kunnoth, Vishwas N. Moolimani
  • Patent number: 10557288
    Abstract: A hoop lock assembly including a shackle and a crossbar. The shackle includes a straight foot and an angled foot. The crossbar is operable to receive the straight foot and the angled foot, and includes a primary locking mechanism and a secondary locking mechanism. The primary locking mechanism is operable to selectively prevent removal of the straight foot from the crossbar. The secondary locking mechanism is operable to selectively prevent removal of the angled foot from the crossbar.
    Type: Grant
    Filed: April 17, 2015
    Date of Patent: February 11, 2020
    Assignee: Schlage Lock Company LLC
    Inventors: Manjunatha Ramakrishna, Subashchandra G. Rai, Vijayakumar Mani, Tejas V Kumar, Hassan Charan Kumar
  • Publication number: 20160305163
    Abstract: A hoop lock assembly including a shackle and a crossbar. The shackle includes a straight foot and an angled foot. The crossbar is operable to receive the straight foot and the angled foot, and includes a primary locking mechanism and a secondary locking mechanism. The primary locking mechanism is operable to selectively prevent removal of the straight foot from the crossbar. The secondary locking mechanism is operable to selectively prevent removal of the angled foot from the crossbar.
    Type: Application
    Filed: April 17, 2015
    Publication date: October 20, 2016
    Inventors: Manjunatha Ramakrishna, Subashchandra G. Rai, Vijayakumar Mani, Tejas V. Kumar, Hassan Charan Kumar
  • Patent number: 8997534
    Abstract: A door lock includes a deadbolt and a latchbolt each movable between a thrown position and a retracted position, an inside lever operable to move the latchbolt between the thrown and retracted positions, and an outside lever configured in one of a locked and unlocked state in which the outside lever is operable to move the latchbolt between the thrown and retracted position. A thumbturn is coupled to the deadbolt and is movable between a first position in which the deadbolt is in the thrown position, the latchbolt is in the thrown position, and the outside lever is locked, a second position in which the deadbolt is in the retracted position, the latchbolt is in the thrown position, and the outside lever is locked, and a third position in which the deadbolt is in the retracted position, the latchbolt is in the thrown position, and the outside lever is unlocked.
    Type: Grant
    Filed: July 25, 2012
    Date of Patent: April 7, 2015
    Assignee: Schlage Lock Company LLC
    Inventors: Subashchandra G. Rai, Charan Kumar
  • Patent number: 8939477
    Abstract: A lock assembly that has a locked state and an unlocked state. The lock assembly includes a latch assembly that has a latch and a clutch mechanism. The clutch mechanism includes a first retractor that is movable in response to movement of an interior handle assembly and selectively in response to movement of the exterior handle assembly, and a second retractor that is movable in response to movement of the interior handle assembly and the exterior handle assembly. The first retractor is always engaged with the latch assembly to move the latch between the extended position and the retracted position. The second retractor is selectively disengaged from the latch assembly and is movable relative to the first retractor when the lock assembly is in the locked state.
    Type: Grant
    Filed: April 22, 2011
    Date of Patent: January 27, 2015
    Assignee: Schlage Lock Company
    Inventors: Scott D. Welsby, Subashchandra G. Rai
  • Publication number: 20140026627
    Abstract: A door lock includes a deadbolt and a latchbolt each movable between a thrown position and a retracted position, an inside lever operable to move the latchbolt between the thrown and retracted positions, and an outside lever configured in one of a locked and unlocked state in which the outside lever is operable to move the latchbolt between the thrown and retracted position. A thumbturn is coupled to the deadbolt and is movable between a first position in which the deadbolt is in the thrown position, the latchbolt is in the thrown position, and the outside lever is locked, a second position in which the deadbolt is in the retracted position, the latchbolt is in the thrown position, and the outside lever is locked, and a third position in which the deadbolt is in the retracted position, the latchbolt is in the thrown position, and the outside lever is unlocked.
    Type: Application
    Filed: July 25, 2012
    Publication date: January 30, 2014
    Applicant: Schlage Lock Company LLC
    Inventors: Subashchandra G. Rai, Charan Kumar
  • Publication number: 20120267903
    Abstract: A lock assembly that has a locked state and an unlocked state. The lock assembly includes a latch assembly that has a latch and a clutch mechanism. The clutch mechanism includes a first retractor that is movable in response to movement of an interior handle assembly and selectively in response to movement of the exterior handle assembly, and a second retractor that is movable in response to movement of the interior handle assembly and the exterior handle assembly. The first retractor is always engaged with the latch assembly to move the latch between the extended position and the retracted position. The second retractor is selectively disengaged from the latch assembly and is movable relative to the first retractor when the lock assembly is in the locked state.
    Type: Application
    Filed: April 22, 2011
    Publication date: October 25, 2012
    Inventors: Scott D. Welsby, Subashchandra G. Rai