Abstract: In an embodiment of the present invention a pump (100) is disclosed which comprises a head (110), in which at least a cylinder is fashioned in which a piston (105) is slidably housed, and a casing (145) fixed to the head (110), which defines an internal volume in which a crankshaft (150) and at least a conrod (155) are housed, which at least a conrod (155) connects the crankshaft (150) with the piston (105), such as to be able to transform a rotary motion of the crankshaft (150) into an alternating motion of the piston (105), signaling means (210) of the temperature of lubricating oil contained in the internal volume of the casing (145) being applied to the casing (145).

Abstract: A hydraulic cleaning unit comprising a high pressure pump (1) arranged to feed a service lance via a hose (10), the pump delivery conduit opening to the outside via a stub shaped as the male part of a usual rotatable quick connect coupling.

Abstract: An intermediate sleeve (30) to be rigidly connected to the end of the motor shaft (11) is provided, having an inner surface (32) of frusto-conical shape adapted to fit the frusto-conical surface (12) of the motor shaft (11), and a cylindrical outer surface (31), and having at least one rib (33), projecting radially from the cylindrical outer surface (31) and positioned to the side thereof; the end of the pump shaft (21) possesses an axial cavity (22) having a cylindrical surface (23) adapted to engage as an exact fit the outer surface (31) of the sleeve (30), and has at least one projecting axial element (25), arranged to lie axially alongside said rib (33) of the intermediate sleeve (30), and to interfere therewith during rotation.

Abstract: A hydraulic cleaning unit comprising a high pressure pump (1) arranged to feed a service lance via a hose (10), the pump delivery conduit opening to the outside via a stub shaped as the male part of a usual rotatable quick connect coupling.

Abstract: An intermediate sleeve (30) to be rigidly connected to the end of the motor shaft (11) is provided, having an inner surface (32) of frusto-conical shape adapted to fit the frusto-conical surface (12) of the motor shaft (11), and a cylindrical outer surface (31), and having at least one rib (33), projecting radially from the cylindrical outer surface (31) and positioned to the side thereof; the end of the pump shaft (21) possesses an axial cavity (22) having a cylindrical surface (23) adapted to engage as an exact fit the outer surface (31) of the sleeve (30), and has at least one projecting axial element (25), arranged to lie axially alongside said rib (33) of the intermediate sleeve (30), and to interfere therewith during rotation.

Abstract: High pressure pump, particularly for water, containing a sealed chamber containing, partially in an oil bath, an inclined disc keyed onto the shank of a socket bush arranged to receive a drive shaft, the bush being received in a hole in the base of the chamber by way of a roller cage and a lip gasket, the inclined disc engaging the ends of pumping pistons to operate them with reciprocating motion, within the chamber base there being provided at least one conduit which connects a region in proximity with the lateral wall of the chamber to the bush-receiving hole within the space between the roller cage and the lip gasket.