초록 ▼

A flow regulator for use in medical apparatus for adjusting the flow of fluid in which there is a valve body with a valve member having a helical flow passage through which the fluid must flow. In order to facilitate quick adjustment of the fluid, the pitch and depth of the groove both progressively

A flow regulator for use in medical apparatus for adjusting the flow of fluid in which there is a valve body with a valve member having a helical flow passage through which the fluid must flow. In order to facilitate quick adjustment of the fluid, the pitch and depth of the groove both progressively change from one end of the flow regulating device to the other, the depth of the groove becoming less as the pitch of the groove becomes finer. The valve member is longitudinally movable with respect to the valve body, and provision is made for adjusting the longitudinal position either by rotation of a threaded valve stem or by longitudinal movement of the valve stem to quickly adjust the flow rate. The helical groove may be either rectangular in cross-section, or V-shaped in cross-section. Suitable means are provided for sealing against leakage through the valve adjusting means.

대표청구항 ▼

In combination with a container for intravenous fluid for delivering the fluid at a controlled rate to a patient, a flexible conduit extending from said container for delivery of said fluid, a valve in said conduit for adjusting the rate at which fluid is delivered, said valve comprising: a valve bo

In combination with a container for intravenous fluid for delivering the fluid at a controlled rate to a patient, a flexible conduit extending from said container for delivery of said fluid, a valve in said conduit for adjusting the rate at which fluid is delivered, said valve comprising: a valve body having inlet and outlet openings and having a cylindrical passage therebetween defined by a cylindrical wall; a flow regulating member extending into the cylindrical passage and having an outer cylindrical surface closely engaging the wall of the cylindrical passage, the flow regulating member having a helical grooved portion on the outer cylindrical surface thereof to form a helical fluid passage through the valve body between said inlet and outlet openings, the pitch of the helical groove progressively varying from one end of the helical groove to the other; and actuating means for shifting the flow regulating member axially to vary the amount of the helically grooved portion that is disposed between the inlet and outlet openings to vary the length of the helical passage through which fluid must flow to adjust the flow of fluid from said container.