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US 4,137,623 AGranted
Method and apparatus for dispensing fluid in a conduit
AssigneeTaylor Industries, Inc.
InventorPhilip W. Taylor
Life of this patent
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AssigneeTaylor Industries, Inc.
InventorPhilip W. Taylor
Estimating the term…
A method and apparatus for dispensing a fluid in a conduit and more particularly for dispensing lubricant within an electrical conduit for facilitating pulling electrical cables through the conduit. The apparatus is in the form of a cartridge disposed in the conduit at an end thereof. The cartridge is made of a pair of sealed and separable members. One of the members is a flanged sleeve forming the casing of the cartridge, in which is coaxially disposed the separable member forming a tubular support member or carrier for a mass of resilient and absorbent lubricant impregnated porous material compressibly packed between the inner surface of the sleeve casing and the carrier. A cable pulling strand, or fishtape, is passed through the tubular carrier, and the cables to be pulled through the conduit are attached to the end of the fishtape. A plug inserted in the open end of the tubular carrier prevents the fishtape and the cables attached thereto from being pulled back through the carrier. The carrier separates from the sleeve casing when a pull is exerted on the other end of the fishtape. The mass of resilient and absorbent material supported by the carrier expands to the inner diameter of the conduit when leaving the sleeve casing and absorbs part of an additional supply of lubricant contained in the cartridge. Pulling the lubricant-impregnated mass of resilient and absorbent material on the carrier ahead of the electrical cables coats the wall of the conduit with a film of lubricant.
An apparatus for dispensing a fluid in an extended conduit comprising a cartridge-like structure made of a pair of coaxial assembled separable inner and outer members disposed one within the other and insertable in an end of said conduit in a fixed position, means attaching the end of a pull strand to said inner member for separating said inner member from said outer member by pulling tension exerted by said pull strand, a resilient absorbent mass of cellular material supported by said inner member and normally compressibly held between said inner and outer member and capable when pulled from said outer member of expanding such as to be peripherally engaged with the wall of said conduit, means integral with the outer member adapted to retain said outer member in the conduit upon said separation, and a supply of said fluid associated within said structure and adapted to be applied to said conduit by said expanded cellular material when moved through said pull string.
A method for coating with a fluid the interior wall of an extended conduit, said method comprising fixedly placing in the end of said conduit a fluid applicator comprising a sleeve casing and a separable carriersupported mass of resilient fluid-absorbent and impregnated material in a partially compressed state, attaching the end of a pull strand to said carrier, and exerting a pull by means of said pull strand so as to separate said carrier and mass of fluid impregnated material as a unit from said sleeve casing and pull said mass of resilient material in an expanded state after leaving said sleeve casing through said conduit with the peripheral surface of said material in engagement with the wall surface of said conduit.
Dependencies are inferred from the claim text.