Pipe connection device for scientific equipment

• US 4,865,363 A
• Filed: 09/09/1988
• Issued: 09/12/1989
• Est. Priority Date: 09/11/1987
• Status: Expired due to Term

• Current Assignee: Kyoshin Industries Company Limited
• Original Assignee: Kyoshin Industries Company Limited
• Inventors: Takahashi, Kazutomo
• Primary Examiner(s): Callaghan, Thomas F.
• Application Number:
  US07/245,665
• Time in Patent Office: 368 Days
• Field of Search: 285/207, 285/356, 285/323, 285/348, 285/354
• US Class Current: 285/323
• CPC Class Codes: F16L 19/065 the wedging action being effected by means of a ring

Abstract

A pipe connection device for a scientific equipment in which a reduced diameter head having slits is formed at a front end part of a clamp covering a packing fitted to an outer circumference of the open end part of the pipe. A part of the packing is positioned within the reduced diameter head. The reduced diameter head, at its extremity end, forms an inclined cylinder part fitted to an inner inclined surface of the fixed screw and also forms a cylinder part to which a pressing ring is engaged and fitted adjacent to the inclined cylinder part. The reduced diameter head is reduced in its diameter by the inner inclined surface under screwing of the fixed screw. The pressing ring, formed to have a slightly smaller diameter than an outer diameter of the cylinder part, is pressed against an open end surface of the inner inclined surface. The pressing ring is raised up over the inclined cylinder part and press fitted onto the cylinder part.

Claims

1. A pipe connection device for scientific equipment comprising:

a pipe having an open end part,

a fixed screw for disposal around said pipe to support said open end part,

a connection base body to which said fixed screw can be connected by screwing said fixed screw into a recess in said connection base body,

a clamp, including a reduced diameter head having slits formed at a front end part of said clamp,

a packing fitted to an outer circumference of said pipe adjacent said open end part of the pipe, said packing covered by said clamp, at least part of the packing being positioned within a cavity formed in said reduced diameter head,

an inclined cylinder part, formed at an extreme end of said reduced diameter head, contacting an inner inclined surface of said fixed screw as said fixed screw is screwed into said recess in said connection base body, said reduced diameter head also forming a cylindrical part adjacent to said inclined cylinder part, said reduced diameter head being decreased in its diameter upon contact with the inner inclined surface of said fixed screw as the fixed screw is screwed into said recess in said connection base body,

a pressing ring having a slightly smaller diameter than an outer diameter of the reduced diameter head before the diameter of said reduced diameter head is decreased, said pressing ring being pressed against an end of said inner inclined surface, so that said pressing ring slides along said inclined cylinder part and is raised up over said inclined cylinder part and press fitted onto the cylindrical part as the diameter of said reduced diameter head is decreased to force said packing into tight engagement with said pipe.