The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 10, 2012
Filed:
Apr. 17, 2009
Philip C. Ellis, Newtown Square, PA (US);
Philip C. Ellis, Newtown Square, PA (US);
Newfrey, LLC, Newark, DE (US);
Abstract
A double slide arm spring mechanism for biasing a primary mechanism to home position after operation and retaining the primary mechanism in the home position pending further operation. The double slide arm spring mechanism includes a pair of slideably interlocking arms each having a longitudinal frame member and a spring engaging flange at each end. The frame members are a disposed to engage one another while permitting relative sliding of the arms. The slide arms are interlocked such that one flange of each arm is situated between the two flanges of the other arm. Two compression springs are retained between the flanges of the arms such that sliding of either arm toward the other necessarily compresses both springs. Potential energy stored in the springs returns the slide to its neutral position when the operator is released thereby also returning the operator to its neutral position. The slide arms produce twice as much force to return operator to it neutral position as would be possible using springs of the same length operated independently.