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. 08, 2000
Filed:
Dec. 16, 1998
Ronald J Hartle, Amherst, OH (US);
Nordson Corporation, Westlake, OH (US);
Abstract
A flexible coating material conduit conducts a flow of electrostatically charged coating material to a spray gun. The flexible conduit includes a first or inner layer which is electrically insulating and chemically nonreactive with the electrostatically charged coating material. A second layer of synthetic rubber is electrically insulating. The second layer has a Shore A hardness of 75 or less and a thickness which is at least 0.200 times an overall radial extent of the conduit. A third layer of synthetic rubber extends around the second layer and is electrically conductive. A fourth layer of polymeric material extends around the third layer and is abrasion resistant and electrically insulating. The third layer is connected with ground. The source of electrostatically charged coating material includes a voltage block which electrically isolates the electrostatically charged coating material from a source of coating material which is not electrostatically charged.