Connection apparatus

• US 4,991,883 A
• Filed: 09/25/1989
• Issued: 02/12/1991
• Est. Priority Date: 09/25/1989
• Status: Expired due to Fees

• Current Assignee: LECO Corporation
• Original Assignee: Ruska Laboratories, Inc.
• Inventors: Worden, Raymond D.
• Primary Examiner(s): Arola, Dave W.
• Assistant Examiner(s): SHACKELFORD, HEATHER CHUN
• Application Number:
  US07/411,929
• Time in Patent Office: 505 Days
• Field of Search: 285/342, 285/305, 285/348, 285/334.4, 285/343, 285/375, 285/267, 285/268, 285/269, 285/279, 285/360
• US Class Current: 285/334.4
• CPC Class Codes: B01J 4/001 Feed or outlet devices as such, e.g. feeding tubes
• CPC Class Codes: C10G 9/20 Tube furnaces
• CPC Class Codes: F16L 37/146 the securing element being a rigid pin, screw or the like
• CPC Class Codes: G01N 30/6026 Fluid seals
• CPC Class Codes: G01N 30/6034 joining multiple columns

Abstract

An apparatus for connecting first and second conduits having first and second bores, respectively, to provide communication between the first and second bores. The apparatus includes a base attached to the first conduit and a cap attached to the base. A follower is slidably disposed in the cap and is provided with a passageway, the second conduit extending through the passageway. A ferrule is received on the second conduit, the ferrule having a first end and a second end. The follower is biased against the first end of the ferrule. The first bore in the first conduit has a frustoconical surface which defines a receiving formation for the ferrule, the ferrule having a portion which is circular when viewed in transverse cross section. When the second end of the ferrule is urged in the receiving formation by the action of the biasing spring, the ferrule engages the frustoconical surface defining the receiving formation in substantially line contact.

Claims

1. An apparatus for connecting a first conduit having a first bore to a second conduit having a second bore to provide communication between said first and second bores comprising:

a base;

means to attach said base to said first conduit;

a cap, said second conduit extending through said cap;

means to attach said cap to said base;

a follower slidably disposed in said cap, said follower having a passageway therethrough, said second conduit extending through said passageway;

a ferrule received on said second conduit, said ferrule having a first end and a second end;

biasing means operative to urge said follower against said first end of said ferrule;

said first bore in said first conduit having a frustoconical surface defining receiving formation for said ferrule, said ferrule second end of said having a portion which is circular when viewed in transverse cross section such that when said second end of said ferrule is urged into said receiving formation by said biasing means, said ferrule engages said frustoconical surface defining said receiving formation in substantially line contact.

2. The apparatus of claim 1 wherein said second conduit comprises a quartz capillary tube.

3. The apparatus of claim 1 wherein said first conduit comprises a fused quartz member.

4. The apparatus of claim 1 wherein said means to attach said base to said first conduit comprise a bayonet mount.

5. The apparatus of claim 1 wherein said cap is threadedly attached to said base.

6. The apparatus of claim 1 wherein said base includes stop means to limit the movement of said follower away from said biasing means.

7. The apparatus of claim 1 wherein said biasing means comprises a fused quartz spring, the spring being disposed interiorly of said cap between a stop wall formed on said cap and said follower.

8. The apparatus of claim 1 wherein said ferrule is comprised of a heat resistant, deformable material.

9. The apparatus of claim 1 wherein said ferrule has a frustoconical portion and a cylindrical portion, said cylindrical portion defining said second end of said ferrule, said cylindrical portion of said ferrule engaging said frustoconical surface of said receiving formation to thereby space said frustoconical portion of said ferrule from said surface defining said receiving formation.