Abstract: In a piston pump (1) having a differential piston (12) positioned in a cylindrical housing (11) and translationally drivable, a first pressure chamber (13) of the differential piston (12) is connectable to a second pressure chamber (14) via a check valve (16) inserted into a connecting line (15), and to a storage reservoir (2) via an inlet valve (23). The differential piston (12) is provided with a dipping piston (41) attached to a piston rod (31). In addition, a pass-through (32) of the piston rod (31) from the first pressure chamber (13) is closed fluid-tight by seals (34), and a transport line (22) is positioned laterally offset from or concentric to the piston rod (31) in the vicinity of the pass-through (32) of the latter.

Abstract: In a piston pump (1) having a differential piston (12) positioned in a cylindrical housing (11) and translationally drivable, the first pressure chamber (13) of the differential piston (12) being connectable alternately to the second pressure chamber (14) via a check valve (16) inserted into a connecting line (15), and to a storage reservoir (2) via an inlet valve (23), the differential piston (12) is provided with a dipping piston (41) attached to a piston rod (31). In addition, the pass-through (31) of the piston rod (32) from the first pressure chamber (13) is closed fluid-tight by seals (33), and the transport line (22) is positioned laterally offset from or concentric to the piston rod (31) in the vicinity of the pass-through (32) of the latter.

Abstract: A diaphragm pump with a flat diaphragm which is held between the face surface of a pump head and the corresponding face surface of a hydraulic block is improved in that the annular clamping region has an angling step such that the clamped-in diaphragm is bent in its outer annular border region. In this way, a sealed tightness is achieved over long time periods, as well as inducing a uniform diaphragm tension which effects performance of the pump advantageously. Inventive valve designs are provided which allow removal for cleaning from outside the assembled pump and also allows manual /pening of the valves for unclogging. An efficient design is provided for a pump head.

Abstract: A diaphragm pump with a flat diaphragm which is held between the face surface of a pump head and the corresponding face surface of a hydraulic block is improved in that the annular clamping region has an angling step such that the clamped-in diaphragm is bent in its outer annular border region. In this way, a sealed tightness is achieved over long time periods, as well as inducing a uniform diaphragm tension which effects performance of the pump advantageously. Inventive valve designs are provided which allow removal for cleaning from outside the assembled pump and also allows manual opening of the valves for unclogging. An efficient design is provided for a pump head.

Abstract: A diaphragm pump with a pumping component composed of a paint stage and propulsion stage; a hydraulic component; and an engine component such as a motor, fashioned such that, in a first predefined position or orientation the hydraulic component and the motor are mounted to each other in side-by-side arrangement, and the pumping component sits on top of the hydraulic component, whereby it is possible to cant the diaphragm pump by 90.degree. and thus bring it into a second operable position for orientation. Unguided paint valves are thereby applied such that, in both positions of the pump, they enclose the same angle with the horizontal line. A measuring stick and an intake line are strategically arranged to be useable in both positions of the pump. A stationary support frame and a mobile support frame are presented to facilitate the flexible positioning or orientation of the pump.