Patents by Inventor Adam M. Litwinski
Adam M. Litwinski 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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Publication number: 20240102311Abstract: A handleset includes a housing, a spindle sleeve, a handle, a coupler, and a spindle. The spindle sleeve includes an aperture, and is rotatably mounted to the housing. The handle is mounted to the spindle sleeve and includes a recess aligned with the aperture. The coupler is movably mounted in the aperture for movement between a decoupling position and a coupling position. The coupler in the coupling position is disengaged from the recess and does not prevent removal of the handle from the spindle sleeve. The coupler in the coupling position extends into the recess and prevents removal of the handle from the spindle sleeve. The spindle is movably received in the spindle sleeve and selectively retains the coupler in the coupling position.Type: ApplicationFiled: December 5, 2023Publication date: March 28, 2024Inventors: Drake Lunday, Adam M. Litwinski, David J. Hurlbert, Zachary Wiggins, Marshall Owens
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Patent number: 11834864Abstract: A handleset includes a housing, a spindle sleeve, a handle, a coupler, and a spindle. The spindle sleeve includes an aperture, and is rotatably mounted to the housing. The handle is mounted to the spindle sleeve and includes a recess aligned with the aperture. The coupler is movably mounted in the aperture for movement between a decoupling position and a coupling position. The coupler in the coupling position is disengaged from the recess and does not prevent removal of the handle from the spindle sleeve. The coupler in the coupling position extends into the recess and prevents removal of the handle from the spindle sleeve. The spindle is movably received in the spindle sleeve and selectively retains the coupler in the coupling position.Type: GrantFiled: February 10, 2021Date of Patent: December 5, 2023Assignee: Schlage Lock Company LLCInventors: Drake Lunday, Adam M. Litwinski, David J. Hurlbert, Zachary Wiggins, Marshall Owens
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Patent number: 11781600Abstract: An exemplary torque-limiting spindle includes an input member, an output member, a clutch mechanism, and a bias mechanism. The input member extends along a longitudinal axis, is configured for connection with a handle, and includes a first engagement feature. The output member extends along the longitudinal axis, is configured for connection with a rotatable member of a lockset, and includes a second engagement feature. The clutch mechanism includes the first engagement feature and the second engagement feature. The bias mechanism is engaged with the input member and the output member and exerts a biasing force urging the first engagement feature and the second engagement feature into engagement with one another.Type: GrantFiled: September 22, 2020Date of Patent: October 10, 2023Assignee: Schlage Lock Company LLCInventors: Drake Lunday, Adam M. Litwinski
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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: 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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Patent number: 11447974Abstract: An anti-barricading turn hub assembly is configured for use with a lockset including a bolt movable to lock and unlock a door. The anti-barricading turn hub assembly includes a spindle connected to a thumb turn on one side of the lock. The spindle is releasably engaged to a turn hub that is operable by the key from the other side of the door. Under normal operation, the spindle and turn hub rotate together to lock and unlock the bolt. In a barricading situation in which the thumb turn is held to prevent the turn hub assembly from rotating, the turn hub disengages from the spindle upon application of sufficient force through rotation of the key, and the disengaged turn hub can be rotated to unlock the bolt even if the thumb turn is held to keep the spindle from rotating.Type: GrantFiled: April 21, 2020Date of Patent: September 20, 2022Assignee: Schlage Lock Company LLCInventors: Steven Verderaime, Adam M. Litwinski, Jonathan M. Carron, Drake Lunday
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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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Publication number: 20220251873Abstract: A handleset includes a housing, a spindle sleeve, a handle, a coupler, and a spindle. The spindle sleeve includes an aperture, and is rotatably mounted to the housing. The handle is mounted to the spindle sleeve and includes a recess aligned with the aperture. The coupler is movably mounted in the aperture for movement between a decoupling position and a coupling position. The coupler in the coupling position is disengaged from the recess and does not prevent removal of the handle from the spindle sleeve. The coupler in the coupling position extends into the recess and prevents removal of the handle from the spindle sleeve. The spindle is movably received in the spindle sleeve and selectively retains the coupler in the coupling position.Type: ApplicationFiled: February 10, 2021Publication date: August 11, 2022Inventors: Drake Lunday, Adam M. Litwinski, David J. Hurlbert, Zachary Wiggins, Marshall Owens
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Publication number: 20220090636Abstract: An exemplary torque-limiting spindle includes an input member, an output member, a clutch mechanism, and a bias mechanism. The input member extends along a longitudinal axis, is configured for connection with a handle, and includes a first engagement feature. The output member extends along the longitudinal axis, is configured for connection with a rotatable member of a lockset, and includes a second engagement feature. The clutch mechanism includes the first engagement feature and the second engagement feature. The bias mechanism is engaged with the input member and the output member and exerts a biasing force urging the first engagement feature and the second engagement feature into engagement with one another.Type: ApplicationFiled: September 22, 2020Publication date: March 24, 2022Inventors: Drake Lunday, Adam M. Litwinski
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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: 20200248476Abstract: An anti-barricading turn hub assembly is configured for use with a lockset including a bolt movable to lock and unlock a door. The anti-barricading turn hub assembly includes a spindle connected to a thumb turn on one side of the lock. The spindle is releasably engaged to a turn hub that is operable by the key from the other side of the door. Under normal operation, the spindle and turn hub rotate together to lock and unlock the bolt. In a barricading situation in which the thumb turn is held to prevent the turn hub assembly from rotating, the turn hub disengages from the spindle upon application of sufficient force through rotation of the key, and the disengaged turn hub can be rotated to unlock the bolt even if the thumb turn is held to keep the spindle from rotating.Type: ApplicationFiled: April 21, 2020Publication date: August 6, 2020Inventors: Steven Verderaime, Adam M. Litwinski, Jonathan M. Carron, Drake Lunday
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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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Patent number: 10626634Abstract: An anti-barricading turn hub assembly is configured for use with a lockset including a bolt movable to lock and unlock a door. The anti-barricading turn hub assembly includes a spindle connected to a thumb turn on one side of the lock. The spindle is releasably engaged to a turn hub that is operable by the key from the other side of the door. Under normal operation, the spindle and turn hub rotate together to lock and unlock the bolt. In a barricading situation in which the thumb turn is held to prevent the turn hub assembly from rotating, the turn hub disengages from the spindle upon application of sufficient force through rotation of the key, and the disengaged turn hub can be rotated to unlock the bolt even if the thumb turn is held to keep the spindle from rotating.Type: GrantFiled: February 15, 2018Date of Patent: April 21, 2020Assignee: Schlage Lock Company LLCInventors: Steven Verderaime, Adam M. Litwinski, Jonathan M. Carron, Drake Lunday
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Patent number: 10612273Abstract: An anti-barricading thumb turn assembly is configured for use with a lockset including a bolt movable to lock and unlock a door. The anti-barricading thumb turn assembly includes a spindle connected to a thumb turn with a biasing member on one side of the lockset. The lockset is also operable by a key from the other side of the door to lock and unlock the door. Under normal operation, the spindle and thumb turn rotate as the bolt is locked and unlocked. In a barricading situation in which the thumb turn is held in an attempt to prevent the spindle from rotating, the biasing member allows the spindle to rotate relative to the thumb turn upon application of sufficient force through rotation of the key to overcome the biasing force and unlock the bolt even if the thumb turn is held stationary.Type: GrantFiled: March 13, 2018Date of Patent: April 7, 2020Assignee: Schlage Lock Company LLCInventors: Adam M. Litwinski, Douglas A. Holmes
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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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Publication number: 20190284840Abstract: An anti-barricading thumb turn assembly is configured for use with a lockset including a bolt movable to lock and unlock a door. The anti-barricading thumb turn assembly includes a spindle connected to a thumb turn with a biasing member on one side of the lockset. The lockset is also operable by a key from the other side of the door to lock and unlock the door. Under normal operation, the spindle and thumb turn rotate as the bolt is locked and unlocked. In a barricading situation in which the thumb turn is held to attempt to attempt to prevent the spindle from rotating, the biasing member allows the spindle to rotate relative to the thumb turn upon application of sufficient force through rotation of the key to overcome the biasing force and unlock the bolt even if the thumb turn is held stationary.Type: ApplicationFiled: March 13, 2018Publication date: September 19, 2019Inventors: Adam M. Litwinski, Douglas A. Holmes
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Publication number: 20190242154Abstract: An anti-barricading turn hub assembly is configured for use with a lockset including a bolt movable to lock and unlock a door. The anti-barricading turn hub assembly includes a spindle connected to a thumb turn on one side of the lock. The spindle is releasably engaged to a turn hub that is operable by the key from the other side of the door. Under normal operation, the spindle and turn hub rotate together to lock and unlock the bolt. In a barricading situation in which the thumb turn is held to prevent the turn hub assembly from rotating, the turn hub disengages from the spindle upon application of sufficient force through rotation of the key, and the disengaged turn hub can be rotated to unlock the bolt even if the thumb turn is held to keep the spindle from rotating.Type: ApplicationFiled: February 15, 2018Publication date: August 8, 2019Inventors: Steven Verderaime, Adam M. Litwinski, Jonathan M. Carron, Drake Lunday
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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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Patent number: 10132104Abstract: 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: October 24, 2017Date of Patent: November 20, 2018Assignee: Schlage Lock Company LLCInventors: Sundar R. Dore Vasudevan, Dilip Bangaru, Adam M. Litwinski, William B. Ainley, Russell L. Steiner, Michelle Vickrey