Patent GB-409092-A (GB)
Title: Improvements in or relating to conveying plant for liquids
IPC: F04F3/00
Filed: 1933-01-18
Abstract: 409,092. Vacuum apparatus. RIEGER, K., and RIEGER, E., (trading as RIEGER, GEB.), 22, Nordlicher, Stadtgraben, Aalen, Wurtemberg, Germany. Jan. 18, 1933, Nos. 1619, 1620, 1622, and 1623. Convention dates, Jan. 18, 1932, May 30, 1932, Oct. 28, 1932, and Dec. 13, 1932. [Class 102 (ii).] Apparatus for raising liquids, especially milk and milk products, comprises a suction tank 7, Fig. 1, which is connected alternately to a suction pump 2 and to atmosphere by a valve device 4 driven by the pump motor 1 through reduction gearing 3. The tank 7 draws from a tank 10 and discharges to a tank 11, check valves 16, 17 being provided. Two suction tanks may be arranged side by side connected to the same pump and valve device, one tank discharging while the other is filling. For greater lifts the suction may take place in stages, two or more suction tanks being arranged one above the other. Each stage may comprise two suction tanks, one discharging while the other is filling and all the tanks being connected to the same suction pump and valve device. A valve device for controlling pipes 21, 22, Fig. 8, to two alternately acting suction chambers comprises a chamber 61 connected to the suction pump and ported valves 63<a>-63<d> on a spindle 62 driven by the pump motor. The valves alternately connect the pipes 21, 22 to the chamber 61 and to atmosphere. Apparatus for dealing with three liquids, e.g. fresh milk, cream and skim-milk comprises a tank 45, Fig. 7, for fresh milk and tanks 46, 47 for cream and skim-milk discharged by a separator 48. The fresh milk is raised to a tank 50 which discharges to the separator and the cream and skim-milk are raised to tanks 53, 55. Chambers I, II, III discharging to the tanks 50, 53, 55 are connected in succession to the pump 2 by pipes 42, 43, 44. The discharge openings of the tanks 50, 53, 55 may be calibrated to ensure only a discharge equal to the discharge of the chambers I, II, III. A rotary valve 68, Fig. 12, for the apparatus shown in Fig. 7, has ports 76 open to atmosphere and a chamber 71 in constant communication with the suction pump through a port 5 in the valve seating. The port 5 is thus put into communication in succession with the mouths of the pipes 42, 43, 44. The mouths of the suction pipes may be at equal or unequal angular distances apart. In order to prevent drawing of air into the suction chambers, the lower ends of the ascension pipes may be controlled by float valves in the supply tanks or in auxiliary tanks. The Specification as open to inspection under Sect. 91 contains also the following subjectmatter. The level of liquid in the suction tanks may be controlled by a rubber or other floating ball valve 85, Fig. 15 (Cancelled), which closes the end of the pipe 82 leading to the suction pump when the liquid level rises. The valve is enclosed in a cage 84 carried by an adjustable seating 88 secured by a stud 89. The pump 2, Fig. 1, may be connected directly to the tank 7, the valve device 4 merely controlling communication of the tank with the atmosphere. This subject-matter does not appear in the Specification as accepted. Reference has been directed by the Comptroller to Specifcation 272,366, [Class 102 (ii)].