Invention Grant
- Patent Title: Variable spring rate chassis
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Application No.: US15466980Application Date: 2017-03-23
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Publication No.: US10597900B2Publication Date: 2020-03-24
- Inventor: Michael Holman , Nathanael S. Murphy , Peter Malenkovic
- Applicant: Schlage Lock Company LLC
- Applicant Address: US IN Carmel
- Assignee: Schlage Lock Company LLC
- Current Assignee: Schlage Lock Company LLC
- Current Assignee Address: US IN Carmel
- Agency: Taft Stettinius & Hollister LLP
- Main IPC: E05B3/04
- IPC: E05B3/04 ; E05B55/00 ; E05B1/00 ; E05B3/00 ; E05B15/00 ; E05B63/00 ; E05B15/16 ; E05B15/04 ; E05B3/06 ; E05B9/02 ; E05B17/00

Abstract:
An apparatus including a chassis assembly having a housing, a spindle rotatably mounted to the housing, a spring collar rotatably mounted to the housing, a first biasing element rotationally urging the spindle toward a spindle home position, and a second biasing element rotationally urging the spring collar toward a spring collar home position. The apparatus may further include a handle mounted on the chassis such that the chassis biases the handle to a handle home position with a return torque. The handle is engaged with the spindle such that the first biasing element contributes to the return torque. In certain embodiments, the handle may further be engaged with the spring collar such that the second biasing element contributes to the return torque.
Public/Granted literature
- US20170275911A1 VARIABLE SPRING RATE CHASSIS Public/Granted day:2017-09-28
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