POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS (machines for liquids, or pumps, of rotary-piston or oscillating-piston type F04C; non-positive-displacement pumps F04D; pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped F04F)

Description

F04B covers positive-displacement pumps and machines designed to move liquids by repeatedly expanding and contracting sealed volumes, forcing fluid through the system with each cycle. This subclass encompasses reciprocating pumps (piston and plunger types), rotary pumps (gear, screw, and vane designs), and diaphragm pumps, along with their essential components such as valves, actuators, and control systems. Applications include industrial fluid transfer, hydraulic systems, chemical processing, and fuel injection systems where consistent volumetric displacement and high-pressure capability are required. Excluded are dynamic (centrifugal) pumps, pumps for elastic fluids covered under F04C, and non-positive-displacement machines.

30 direct subcodes

Child Classifications

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F04B 1/00 Multi-cylinder machines or pumps characterised by number or arrangement of cylinders (machines or pumps with pistons coacting within one cylinder F04B3/00)
F04B 11/00 Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
F04B 13/00 Pumps specially modified to deliver fixed or variable measured quantities
F04B 15/00 Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
F04B 17/00 Pumps characterised by combination with, or adaptation to, specific driving engines or motors
F04B 19/00 Machines or pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B1/00 - F04B17/00
F04B 2201/00 Pump parameters
F04B 2203/00 Motor parameters
F04B 2205/00 Fluid parameters
F04B 2207/00 External parameters
F04B 23/00 Pumping installations or systems (pumps characterised by combination with, or adaptation to, specific driving engines or motors F04B17/00)
F04B 25/00 Multi-stage pumps
F04B 27/00 Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders (multi-stage pumps specially adapted for elastic fluids F04B25/00)
F04B 29/00
F04B 3/00 Machines or pumps with pistons coacting within one cylinder, e.g. multi-stage
F04B 31/00 Free-piston pumps specially adapted for elastic fluids; Systems incorporating such pumps (muscle-driven pumps in which the stroke is not defined by gearing F04B33/00)
F04B 33/00 Pumps actuated by muscle power, e.g. for inflating
F04B 35/00 Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
F04B 37/00 Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
F04B 39/00 Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00