Patent · US Active

Variable spring rate chassis

US10597900B2 · kind B2 · utility

2Cited by

11References

23Claims

0Family size

Assignee

Schlage Lock Company LLC · US

Inventors

Michael Holman · Lomita, US
Nathanael S. Murphy · Lower Saucon Township, US
Peter Malenkovic · Monument, US

Key dates

Filing date	Mar 23, 2017
Grant date	Mar 24, 2020
Priority date	—
Expiry date	Jul 19, 2037

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE05B2015/0448
WIPO fieldCivil engineering
WIPO sectorOther fields

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.