Method of manufacturing couplings

Details Method of manufacturing couplings Method of manufacturing couplings

1993-08-18

1994-12-27

Arola, Dave W.

Metal deforming

By relatively receding work-engaging tool-faces

Embodying three or more tools

2989015, 285252, 285259, B21D 4102

Patent

active

053754506

ABSTRACT:
There are described a coupling having the bullet-shaped projections on a cylindrical holding portion for preventing a hose from coming off from the holding portion and a method of manufacturing the same. The coupling is capable of preventing the hose from being broken by the projections thereof by rounding the end edges of the projections, which leads to stability of the coupling for a long time.

REFERENCES:
patent: 1166059 (1915-12-01), Ledbetter
patent: 3989280 (1976-11-01), Schwarz
patent: 5082314 (1992-01-01), Aubry et al.
patent: 5190323 (1993-03-01), Oetiker

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