Abstract: A flow regulator for drip infusion, comprising a rigid main body in which a rigid flow path is integrally formed. The flow path is substantially omega-shaped, and has a V-shaped cross section in its middle section, of which the upper side is open and closed by a flexible disc which has a ridge extending perpendicular to the flow path and can be pressed to change the effective size of an orifice formed between the ridge and the V-shaped flow path, thereby allowing for a stable control of the flow rate.

Abstract: This invention relates to a controller and in particular to a liquid flow controller for intravenous injection comprising a first cylindrical member provided at one end surface with a pair of threaded tongues which extend outwardly therefrom and form a recess thereof, a flange being properly disposed on said end surface, a second cylindrical member being hollowed and threadedly engaged with said first cylindrical member, an annular member provided at a first end surface with a hole being received within and secured to said second cylindrical member, a controlling rod being inserted into and located within said annular member, a rubber hose partially surrounded by a rubber ring being positioned in said recess and clamped between said flange and said controlling rod, a solid rubber rod being inserted into and received within said rubber hose, and a pair of connectors being disposed on the both terminals of said rubber hose of a better connection.