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. 14, 1995
Filed:
Jun. 18, 1993
Siavoosh K Enayati, San Mateo, CA (US);
Metcal, Inc., Menlo Park, CA (US);
Abstract
A coupling device for joining ends of pipes together or capping an end of a single pipe. The device includes a metal insert having serrations for engaging an inner surface of a plastic pipe, a deformable coupling member which overlies the pipe and a metal ring of smaller inner diameter than the outer diameter of the coupling member for compressing the coupling member and plastic pipe against the metal insert. A space forming feature reduces the insertion force required to slide the metal ring over the coupling member. For instance, the metal insert can include a circumferentially extending groove on an outer surface to accommodate flow of the plastic pipe as it is deformed by the metal ring. Alternatively, the coupling member can include a recess, groove or projection, the inner surface of the coupling member can be tapered, the end of the plastic pipe can be tapered or a compressible member or a ball bearing can be inserted between the end of the pipe and the coupling member to accomplish the same result.