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:
Feb. 17, 1987
Filed:
Aug. 15, 1985
Derek A Rush, London, GB;
Smiths Industries Public Limited Company, London, GB;
Abstract
Heat dissipation from electronic modules is improved by clamping their edges against heat-conducting fins in a housing by means of two expanding jackscrews. Each jackscrew has a shaft mounted in bearings in the module and carries a row of alternate closed rings and split rings. The closed rings are smaller in diameter than the split rings and have a circular section. The split rings are of tubular shape, having ends of circular section which engage the closed rings. The forward end of the shaft is screw-threaded to engage a fixed nut in the housing. When the shaft is screwed into the fixed nut, it pulls a connector on the module into engagement with a cooperating connector in the housing. At the same time, the closed rings are forced against the split rings, causing them to expand radially and exert a clamping force against the edges of the modules, forcing them into thermal contact with the fins in the housing.