Abstract 1,089,511. Mixing proportionately flowing fluids. P. G. TACCHI. Jan. 15, 1965 [Jan. 22, 1964], No. 2808/64. Heading B1C. [Also in Divisions F1 and F2] In apparatus for mixing two fluids in constant proportions, e.g. cold water and steam, to form hot water, cold water is admitted at 12 to a high pressure chamber 10 and passes through a restrictive by-pass 18 to a lowpressure and mixing chamber 13. A pressure responsive element such as a bellows 35 separates the two chambers and operates a valve member 31 to admit steam from the inlet 27 to the chamber 13, hot water passing out at 46. An additional fluid (e.g. detergent) may be dosed into the hot water through passage 62 by a pumping device comprising a piston 47 attached to the bellows, a dose being injected every time closure of the outlet control valve, e.g. a spray lance, causes equalization of pressure across the bellows. The stroke of the pump at the size of the by-pass restriction are both adjustable; the latter may be done by a thermostatic capsule. The valve member 31 and its seat 63 may be replaced by others of different sizes. In a modification, (see Figs. 3-6, not shown) the pressure-responsive element is a spring-loaded piston and the pumping device comprises a cylinder attached to the piston and cooperating with a fixed plunger.
APPARATUS FOR INJECTING A SECONDARY FLUID INTO A FLOW OF PRIMARY FLUID COMPRISING A HOLLOW BODY OF SUBSTANTIALLY CYLINDRICAL FORM HAVING AN INLET FOR THE PRIMARY FLUID AT ONE END AND AN OUTLET FOR FLUID AT THE OTHER END, A PRESSURE RESPONSIVE BELLOWS DISPOSED WITHIN THE BODY TO DIVIDE THE INTERIOR THEREOF INTO A HIGH PRESSURE CHAMBER AND A LOW PRESSURE CHAMBER, THERE BEING A PASSAGE OF RESTRICTED CROSS-SECTION EXTENDING BETWEEN THE HIGH AND LOW PRESSURE CHAMBERS, A PUMPING DEVICE COMPRISING A CHLINDER AND A PISTON SLIDABLE THEREIN, MEANS CONNECTING SAID PUMPING DEVICE TO THE CLOSED END OF THE BELLOWS WHEREBY MOVEMENT OF SAID BELLOWS PRODUCES RELATIVE MOVEMENT BETWEEN SAID CYLINDER AND PISTON,
Claim 2
Dependent Claim
113 words
APPARATUS FOR INJECTING A SECONDARY FLUID INTO A FLOW OF PRIMARY FLUID COMPRISING A HOLLOW BODY OF SUBSTANTIALLY CYLINDRICAL FORM HAVING AN INLET FOR THE PRIMARY FLUID AT ONE END AND AN OUTLET FOR FLUID AT THE OTHER END, A PRESSURE RESPONSIVE BELLOWS DISPOSED WITHIN THE BODY TO DIVIDE THE INTERIOR THEREOF INTO A HIGH PRESSURE CHAMBER AND A LOW PRESSURE CHAMBER, THERE BEING A PASSAGE OF RESTRICTED CROSS-SECTION EXTENDING BETWEEN THE HIGH AND LOW PRESSURE CHAMBERS, A PUMPING DEVICE COMPRISING A CHLINDER AND A PISTON SLIDABLE THEREIN, MEANS CONNECTING SAID PUMPING DEVICE TO THE CLOSED END OF THE BELLOWS WHEREBY MOVEMENT OF SAID BELLOWS PRODUCES RELATIVE MOVEMENT BETWEEN SAID CYLINDER AND PISTON,