Abstract: A regulator for evacuation systems including hospital aspiration systems, such regulator being inexpensively manufactured and assembled and providing a number of unique features. The subject regulator is designed to be essentially independent of altitude of operation or humidity conditions, may be made discretely or continuously variable, and also is provided with features reducing, if not eliminating, any noise of air drawn into the system for regulation purposes. An important feature of the invention is the provision of one or more metering apertures of reduced cross section such that possible error of observable knob setting is reduced to an absolute minumum, thus eliminating the necessity of mechanical-adjustment calibration. Settings are essentially accurate for all altitudes, humidity conditions, and particular pumping parameters of existing vacuum systems.

Abstract: A vacuum operated fluid collection bottle including a fluid inlet port and also a vacuum port, with the vacuum port being provided with an improved vacuum shut-off valve provided with an air deflecting baffle. Such baffle is disposed underneath the valve element or valve gate and is spaced therefrom. The purpose for the baffle is to deflect air essentially around the valve gate so that the pressure of onrushing air, due to the imposition of a vacuum condition, will not cause the valve gate to close prematurely. Thus, the valve gate, even though made of lightweight material, will be permitted simply to float upwardly in response to the rise of fluid level within the bottle until an essentially bottle-filled condition is reached, at which point the lightness of the valve gate will be responsive to the reduced pressure area at the vacuum port so as to suck into and tightly seat against the valve seat provided therefor.

Abstract: The present invention comprises a vacuum-operated fluid-collection bottle and system including a serially connected tandem system. Dual vacuum bosses for a representative bottle, one being valved, in multiple-boss covers may be used as respective automatic shut-off and tandem-fill means, with the non-applicable boss being releasably capped off. Two of the three conduit portions of the cover may be connected together through appropriate valving system so that either or both may be effective in supplying vacuum communication to the interior of the bottle at selected height levels. Valving means pre-determine maximum fluid height within the bottle, either automatically or by valve adjustment. A representative bottle may include fluid inlet and vacuum ports of differing level-dimension, to aid the lower vacuum port to close off or to conduct outwardly body-fluid while maintaining the inlet port above the bottle fluid level.

Abstract: The present invention comprises a vacuum-operated, fluid-collection bottle having advantageous, canted sealing surfaces between cover and container as well as other improvements including a perforate vacuum fitting, spherical top and bottom, .[.both convex and concave; float valve means incorporated in the vacuum port construction;.]. snap-lock engagement between the cover and container; graduation means for measuring small volumes of collected fluid, and so forth.