GB843103A - Improvements in or relating to reciprocating pumps - Google Patents

Abstract

843,103. Reciprocating pumps ; compressors. PALMER, J. E. June 11, 1956 [June 25, 1955], No. 17908/56. Classes 8(1) and 102(1). A fluid pump comprises a body portion 1 formed with concentric inlet and outlet ducts 2, 5 respectively, the inlet duct 2 having diametrically opposite ports 6, 8 and the outlet duct 5 a single outlet port 9, a relief valve 10 being disposed between the ducts 5, 2. A plurality of cylinder blocks are secured to the body 1 and each block comprises a chamber 22 which communicates through an inlet valve 30 with a port 16 in the body 1 which communicates with the inlet duct 2, and with a recess 17 in the body 1 which recess communicates through an outlet valve 37 and a port 40 in the block with a port in the body which port communicates with the duct 5. The chamber 22 communicates with the cylinder space 21 in which is reciprocably mounted a piston having a connecting rod 49, diametrically opposite rods 49 being integral with a yoke 50. Each yoke surrounds a ball bearing 55 mounted on a crank pin 54. The pump may be used for agricultural spraying the first inlet port 6 being connected to a supply reservoir and the second inlet port 8 being connected to valve means the arrangement being such that by operating the valve means the spraying device may be emptied by connecting it to the inlet 8.