Abstract: Provided is an impulse tool including a motor, an output shaft, and a hydraulic pulse unit including an inertia drive member connected to the motor and rotatable about a rotation axis, an oil chamber enclosed in the inertia drive member and an impulse generating means arranged to transfer intermittently kinetic energy to the output shaft. The inertia drive member further includes an end piece having a transverse wall and a disc shaped element arranged to at least partly delimit a receiving space in fluid communication with the oil chamber. Formed between the disc shaped element and the transverse wall and a compressible insert arranged in fluidic communication with the receiving space. The compressible insert includes a foam body including a closed cell foam, and wherein the compressible insert is arranged in an insert space formed in the end piece.

Abstract: The present specification relates to an impulse tool comprising a motor, an output shaft, and a hydraulic pulse unit including an inertia drive member connected to the motor and rotatable about a rotation axis, an oil chamber enclosed in the inertia drive member and an impulse generating means arranged to transfer intermittently kinetic energy to the output shaft, wherein the inertia drive member further comprises an end piece having a transverse wall, the impulse tool further comprising a disc shaped element arranged to at least partly delimit a receiving space in fluid communication with the oil chamber, formed between the disc shaped element and the transverse wall and a compressible insert arranged in fluidic communication with the receiving space, wherein the compressible insert comprises a foam body comprising a closed cell foam, and wherein the compressible insert is arranged in an insert space formed in the end piece.

Abstract: The inventions refer to a mixer assembly for generating and maintaining a movement within waste water, comprising a hub (3) and at least two blades (4), which are disengageably connected to said hub (3), the hub (3) in a rear end being arranged to be connected to a drive shaft and thereby being arranged to be driven in rotation about an axially extending centre axis. According to the invention the hub (3) comprises a seat (9) for each of said at least two blades (4), each seat (9) comprising an axially extending first engagement means (10), and that each blade (4) comprises an axially extending second engagement means (11), said first engagement means (10) and said second engagement means (11) together being arranged to admit axial mutual displacement of said hub (3) and each of said blades (4) during mounting/demounting of the propeller assembly, and is thereto arranged to prevent radial mutual displacement of said hub (3) and each of said blades (4) when the mixer assembly is in an assembled condition.