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:
Apr. 14, 1992
Filed:
Nov. 08, 1990
Henry R Vanderzyden, Byron, IL (US);
Gregory G Johnson, San Diego, CA (US);
Sundstrand Corporation, Rockford, IL (US);
Abstract
Inoperability due to solenoid freeze-up, electrical malfunction or human error in a mechanical disconnect system for disconnecting first and second shafts includes a disconnect plunger, a first spring for urging the disconnect plunger toward the first shaft whereby the disconnect plunger causes the first shaft to disengage the second shaft when the disconnect plunger is in contact with the first shaft, a solenoid having an armature and windings and a solenoid plunger coupled to the solenoid armature. A second spring urges the solenoid plunger into engagement with the disconnect plunger to thereby prevent movement of the disconnect plunger into engagement with the first shaft. The solenoid windings are controllably energized to move the solenoid armature such that the solenoid plunger is retracted from the disconnect plunger. An expandable material is disposed in a confined volume of space between the disconnect plunger and the solenoid whereby the expandable material expands when heated to a certain temperature to in turn move the solenoid plunger, solenoid armature and solenoid windings away from the disconnect plunger and thereby cause the disconnect plunger to contact the first shaft under the influence of the first spring.