Multiple fluid conveying hose assembly and method of making same

• US 4,517,404 A
• Filed: 02/02/1983
• Issued: 05/14/1985
• Est. Priority Date: 02/02/1983
• Status: Expired due to Fees

• Current Assignee: Dayco Products LLC
• Original Assignee: Dayco Europe Srl (Park-Ohio Holdings Corporation)
• Inventors: Hughes, William E., Dare, Keith E., Cooper, Jerry W.
• Primary Examiner(s): Askin, Laramie E.
• Application Number:
  US06/463,354
• Time in Patent Office: 832 Days
• Field of Search: 174/47, 15/321, 15/322, 29/858, 137/561 A, 138/109, 138/111, 138/114, 285/7, 285/131, 285/133 R, 285/137 R, 339/15, 339/16 R, 339/16 C
• US Class Current: 174/47
• CPC Class Codes: A47L 9/24 Hoses or pipes; Hose or pipe couplings hoses or hose joints in general F16L
• CPC Class Codes: F16L 11/22 Multi-channel hoses
• CPC Class Codes: Y10T 29/49176 with molding of electrically insulating material

Abstract

A multiple fluid conveying hose assembly comprising a principal vacuum conveying hose for a vacuum cleaning system, and a smaller diameter liquid conveying hose passing through its interior. A molded end connector on the principal hose provides an outlet for the smaller hose and serves to separate the ends of the two hoses for use. Alternatively, the hose may utilize reinforcing wire coils which also serve as electrical conductors.

Claims

1. A multiple fluid conveying hose assembly comprising of first hose having a tubular wall defining a passage internally thereof and axially spaced helical reinforcing coils for said tubular wall, a second hose linearly positioned within said passage of said first hose, and a connector on at least one end of said first hose having an end wall at right angles to the longitudinal axis of said first hose, said second hose being coextensive with the entire length of said first hose and said connector and passing through said end wall of said connector to the exterior of said first hose and having an outlet separate from the outlet of said first hose.

2. The hose assembly of claim 1 wherein said reinforcing coils are separate electrical conductors, and said connector further comprises electrical connection means contacting said coils, said electrical connection means proividing electrical continuity from said coils to the exterior of said connector.

3. The hose assembly of claim 1 wherein said connector is molded on said first hose.

4. The hose assembly of claim 1 wherein said second hose has a diameter substantially less than the diameter of said first hose.

5. The hose assembly of claim 1 wherein said second hose has a diameter about one-fourth the diameter of said first hose.

6. The method of making a multiple fluid conveying hose assembly comprising the steps of forming a first hose having an internal passage, locating axially spaced helical reinforcing coils within said first hose, said coils providing electrical continuity throughout the length of said hose;

providing a connector having an end wall and an outer wall surrounding at least one end of said hose, placing electrical connection means within said connector and interconnecting said coils and said electrical connection means;

positioning a second hose within said passage of said first hose and coextensive with the entire length of said first hose and said connector, and passing said second hose through said end wall of said connector to the exterior of said first hose.

7. The method of claim 6 including the step of molding said connector to the outer surface of said first hose to form an integral connector.