Abstract: The invention relates to a mechanical seal arrangement comprising a first mechanical seal (2) having a first rotating sliding ring (22) and a first stationary sliding ring (21) defining a first sealing gap (20) therebetween, a second mechanical seal (3) having a second rotating sliding ring (22) and a second stationary sliding ring (32) defining a second sealing gap (30) therebetween, a housing (4) having an inlet (40) and an outlet (41) for a cooling liquid, a rotating conveying sleeve (5) joined to the first rotating sliding ring (22) and the second rotating sliding ring (32), the conveying sleeve (5) having a plurality of conveying grooves (50) on its outer circumference wherein the first stationary sliding ring (21) is arranged radially outside the conveying sleeve (5) and has an inner circumference (21a) which is arranged eccentrically with respect to an outer circumference (50a) of the conveying sleeve (5) so that a circumferential eccentric gap (6) is formed between the outer circumference (50a) of the

Abstract: A support device for a mobile house type trailer is mounted within a compartment adjacent the front of the trailer and includes a pair of telescoping leg structures which are extensible to engage the ground and support the trailer when it is disconnected from a prime mover, the leg structures being retractable when the trailer is connected to the prime mover. A reversible electric motor is drivingly connected to a driven shaft through a belt and pulley drive, this driven shaft being operable to extend and retract the leg structures.