PLASTIC PIPE SECTION WITH AN IMPROVED TAP-IN ARRANGEMENT

• US 3,847,418 A
• Filed: 12/01/1972
• Issued: 11/12/1974
• Est. Priority Date: 12/01/1972
• Status: Expired due to Term

• Current Assignee: J&M Manufacturing Company Incorporated (J & M Industries, Inc.)
• Original Assignee: David W. French, Donald W. Andrews, Ralph Semprevivo, Richard L. Clark
• Inventors: Semprevivo, Ralph, Andrews, Donald W., Clark, Richard L., French, David W.
• Primary Examiner(s): Arola, Dave W.
• Application Number:
  US05/311,198
• Time in Patent Office: 711 Days
• Field of Search: 285/197,199,198,200,219,423 138/177
• US Class Current: 285/219
• CPC Class Codes: F16L 47/26 for branching pipes; for joining pipes to walls; Adaptors therefor

Abstract

A heat deformable plastic pipe section having an improved tap-in arrangement is disclosed herein along with a method of forming the same. The tap-in arrangement includes an outer zone defined by a substantially flat exterior surface and a substantially flat interior surface and an inner zone located within the outer zone and preferably having a curvilinear and more particularly a circular, periphery. Like the outer zone, the inner zone is defined by substantially flat exterior and interior surfaces which are inwardly indented with respect to the outer zone. In order to tap into the pipe section, that is, in order to provide fluid communication between the interior and exterior of the pipe section an open ended passage, preferably internally threaded, is provided through the flat surfaces of the inner zone.

Claims

1. A plastic pipe section comprising:

a. a hollow body portion having a curvilinear cross-section;

b. a tap-in outer zone comprising an integral part of and integrally formed in said body portion and having a substantially flat exterior surface and a substantially flat interior surface;

c. a tap-in inner zone surrounded by and integrally formed with said outer zone and defined by a curvilinear periphery, said inner zone being inwardly indented with respect to said interior and exterior surfaces of said outer zone and having substantially flat exterior and interior surfaces; and

d. said tap-in inner zone including an internally threaded open ended passage extending therethrough, said passage providing fluid communication between the interior and exterior of said body portion.

2. A plastic pipe section according to claim 1 wherein said curvilinear periphery defining said inner zone is a substantially circular periphery.

3. A plastic pipe section according to claim 1 wherein the cross-sectional wall thicknesses of said outer zone, inner zone, and hollow body portion having a curvilinear cross section are substantially equal.