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:
May. 08, 1979
Filed:
Aug. 18, 1977
George T Coors, Tipp City, OH (US);
Ledex, Inc., Dayton, OH (US);
Abstract
Wet and dry plunger solenoids are formed with a three-piece spool assembly including a base and a hub joined by a non-magnetic sleeve. An electric coil is wound directly onto the sleeve to compress the sleeve about the telescopically interfitted base and hub parts to form a fluid-tight joint. In a wet plunger solenoid the armature or plunger cavity has high resistance to deformation when fluid pressure is applied to the interior, and a fluid-tight joint is formed which is free of threaded connections and is reinforced by reason of the fact that the coil is wound in tension. The cumulative compression effectively joins the parts into a unitary structure. Also, a highly efficient low cost construction is provided for use in a dry solenoid.