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:
Nov. 28, 1995
Filed:
May. 13, 1994
Dieter Schwalm, Bielefeld, DE;
Rainer Neumann, Herten, DE;
Vulkan Lokring GmbH, Herne, DE;
Abstract
A connector for cylindrical plastic tubes has a metallic inner sleeve with an outer diameter that is greater than in inner diameter of the plastic tubes to be connected. The inner sleeve has a free end and a securing flange positioned opposite the free end. A metallic sliding sleeve for being slipped onto a section of the plastic tube having inserted therein the inner sleeve is provided. The inner sleeve has an outer surface with at least one circumferential rib of a substantially rectangular cross-section. The sliding sleeve has a leading end and a rearward end in the direction of sliding onto the section. The sliding sleeve has an inner surface that beginning at the leading end and ending at the rearward end, has sequentially: a first conically narrowing zone, a second conically narrowing zone, a cylindrical zone, a third conically narrowing zone, and a cylindrical zone. In a preferred embodiment, two inner sleeves are fixedly connected to one another in a mirror-symmetrical arrangement to form a unitary sleeve member.