← Back to Patent Explorer
US3784236A Expired / Lapsed US ⏱️ 0.0 years remaining

Fitting for flexible conduits

Assignee: Robroy Industries Inc
•
Filing: 1971-10-05
•
Granted: 1974-01-08
•
Expires: 1991-10-05
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract An improved fitting, especially a compression coupling, for flexible conduits, such as flexible plastic hose and the like. A coupling includes a coupling nut assembly and further includes a rigid, usually metallic, nipple having a fluid passageway therethrough. The nipple is adapted to slidably receive and mount a flexible conduit thereon whereby the conduit may pass into and be received by the coupling. The coupling nut assembly comprises male and female members adapted to be engaged, as by threading, whereby an annular gasket is urged into annular compressing contact with a conduit in the coupling. Integral sleeve means are provided extending from said coupling in operable contact with said conduit whereby crimping or breaking of the conduit near the end of the nipple on which it is mounted is substantially eliminated. Preferred sleeve means comprises a polymeric coating, especially a polyvinylchloride coating, bonded to the coupling nut assembly and terminating in a polymeric annular sleeve extending from the coupling nut assembly and terminating in a polymeric annular sleeve extending from the coupling nut and adapted to receive a flexible conduit passing into the coupling. In that fashion, crimping and breaking of the flexible conduit in the coupling is substantially prevented.

Inventors

  • 👤 F Slocum

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 20:41
CPC Classifications
F; F16; F16L; F16L35/00; F16L33/00; F16L33/22; F16L33/223; F16L33/224

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 224 words
A compression coupling for a flexible conduit comprising, a flexible conduit, a coupling nut assembly including a male coupling member, a female coupling member, a nipple and an annular gasket, said nipple having a fluid passageway therethrough and an external surface to receive an end portion of said flexible conduit, said nipple with said flexible conduit end portion positioned thereon positioned in said female coupling member with said flexible conduit extending through said female coupling member and having a portion extend beyond said female coupling member, said annular gasket positioned in said female coupling member around said conduit end portion positioned on said nipple, said male coupling member threadably engaged in said female coupling member and compressing said annular gasket to frictionally engage said conduit end portion to said female coupling member and said nipple, and a resilient polymeric coating bonded around the outer surface of said female coupling member, said polymeric coating having a cylindrical resilient polymeric sleeve portion formed integrally therewith, said sleeve portion extending from said resilient polymeric bonded coating with said flexible conduit extending therethrough, said cylindrical sleeve having a sufficient length to permit bending of said flexible conduit and extending the bending radius of said flexible conduit to reduce crimping of said flexible conduit upon bending of said flexible conduit and said sleeve adjacent to said female coupling member.
Claim 2
Dependent Claim 224 words
A compression coupling for a flexible conduit comprising, a flexible conduit, a coupling nut assembly including a male coupling member, a female coupling member, a nipple and an annular gasket, said nipple having a fluid passageway therethrough and an external surface to receive an end portion of said flexible conduit, said nipple with said flexible conduit end portion positioned thereon positioned in said female coupling member with said flexible conduit extending through said female coupling member and having a portion extend beyond said female coupling member, said annular gasket positioned in said female coupling member around said conduit end portion positioned on said nipple, said male coupling member threadably engaged in said female coupling member and compressing said annular gasket to frictionally engage said conduit end portion to said female coupling member and said nipple, and a resilient polymeric coating bonded around the outer surface of said female coupling member, said polymeric coating having a cylindrical resilient polymeric sleeve portion formed integrally therewith, said sleeve portion extending from said resilient polymeric bonded coating with said flexible conduit extending therethrough, said cylindrical sleeve having a sufficient length to permit bending of said flexible conduit and extending the bending radius of said flexible conduit to reduce crimping of said flexible conduit upon bending of said flexible conduit and said sleeve adjacent to said female coupling member.
Claim 3
Dependent Claim 27 words
The compression coupling as set forth in claim 1 in which said sleeve has an inner diameter substantially equal to the external diameter of said flexible conduit.
Claim 4
Dependent Claim 17 words
The compression coupling as set forth in claim 2 wherein said sleeve means comprises a polyvinylchloride composition.
Claim 5
Dependent Claim 45 words
The compression coupling as set forth in claim 1 wherein, said bonded coating on said female coupling member includes a second sleeve extending in a direction opposite to said first sleeve and said second sleeve extends around the outer surface of said male coupling member.
Claim 6
Dependent Claim 48 words
The compression coupling as set forth in claim 4 in which, said male coupling member includes a bonded coating on a portion of the outer surface thereof, said second sleeve on said female coupling member positioned in overlying relation with said bonded coating on said male coupling member.
Claim 7
Dependent Claim 28 words
The compression coupling as set forth in claim 1 in which said sleeve has a length that extends for several inches over the surface of said flexible conduit.

References Cited (Backward Citations)

GB552863A Cited
US2449916A Cited
US2700988A Cited
US3535136A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-01-07 1977-07-09 1978-01-08 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-01-07 1981-07-09 1982-01-08 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-01-07 1985-07-09 1986-01-08 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag