| 摘要 |
Title: "Swivel Hose Couplings" In one form of the invention, the swivel hose couplings include two parts, a swivel insert which may be threaded or otherwise attached to the end of the hose, and a swivel hose end piece which has an internal groove therein in which an exterior portion of the swivel insert is rotatably received. A sealing lip may be provided on the exterior of the swivel insert to form e seal with the wall of the internal groove in the swivel hose end piece. Also, a skirt portion may be provided on the swivel hose end piece which extends axially into the end of the hose to shield the axial outer end of the swivel insert and hose end against entrained material in the fluid passing through the coupling from entering the swivel connection between the swivel insert and swivel hose end piece. In another form of the invention, the swivel hose end piece may consist of two separate parts, a plain end portion and a swivel insert retaining end portion, thereby permitting the plain end portion to be made of a softer, more pliable plastic material than the swivel insert retaining end portion. To connect the plain end portion to the swivel insert retaining end portion, an external annular groove is provided adjacent the axial inner end of the plain end portion for receipt of an inturned end at the axial outer end of the swivel insert retaining end portion. An inturned flange may also be provided on the swivel insert retaining end portion adjacent the axial inner end of the plain end portion to provide a hard bearing surface for the axial outer end of the swivel insert. In another form of swivel hose coupling in accordance with the invention, a two-piece swivel hose end is provided, including a threaded end portion for threaded engagement with the end of a corrugated plastic hose, and a plain end portion which is coupled to the threaded end portion by engagement of an inturned flange on the axial outer end of the threaded end portion in an external annular groove in the plain end portion adjacent the axial inner end thereof.
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