Abstract: A surface cleaning machine is provided, including a cleaning roller holder, at least one cleaning roller which is arranged on the cleaning roller holder, a drive device for driving the at least one cleaning roller in rotation, and a sweeping element which is associated with the at least one cleaning roller and which feeds swept material to the at least one cleaning roller, wherein the sweeping element, at least during a cleaning operation, projects with a front region into a jacket of the at least one cleaning roller, wherein a front face end of the sweeping element is arranged on the front region.

Abstract: A motor pump unit for a high-pressure cleaning appliance is provided, in which the cleaning liquid conveyed by the pump assembly is used for cooling the motor, comprising a motor housing which surrounds the motor, and a cooling channel which surrounds the motor and through which the cleaning liquid can flow for heat dissipation. To provide a motor pump unit having a level of electrical safety which is higher than that of a conventional motor pump unit, the cooling channel surround the motor housing, and the motor pump unit comprise at least one thermally conductive spacer element by way of which the cooling channel is spaced from the motor housing. A high-pressure cleaning appliance is also provided.

Abstract: A vehicle washing installation is provided including first and second supports on which a horizontal roof wash brush and a roof drying unit are held for movement between an upper and a lower end position, and a splash guard element arranged between the roof wash brush and the roof drying unit at the upper end position. The splash guard element has a recess extending in the area between a lateral edge and a lower edge of the splash guard element and into which a part of the roof drying unit in its upper end position extends, wherein the lower edge has a drain channel extending over the width of the splash guard element, the drain channel having an end section movable between a first position where it extends over the entire width of a recess and engages under the recess and a second position where it releases the recess.

Abstract: A floor cleaning machine is provided, in particular a hand-guided and/or hand-held floor cleaning machine, including a support device, at least one cleaning roller arranged on the support device, capable of being driven in rotation and provided with a cleaning substrate, a fan device for creating a suction flow, and a suction channel device for the suction flow which provides a suction channel operatively connected for fluid communication between the fan device and the at least one cleaning roller, wherein the suction channel has a mouth towards the at least one cleaning roller that includes a first and a spaced second mouth wall having a mouth opening therebetween, wherein the first mouth wall is positioned above the second mouth wall relative to the direction of gravity, wherein the first and/or second mouth wall are/is in contact against or protrude(s) into the cleaning substrate of the at least one cleaning roller.

Abstract: A valve gun for a high-pressure cleaner is provided, including an inlet channel with an inlet for supplying a pressurized liquid and an outlet channel with an outlet for discharging the liquid, a valve arranged in the flow path between the inlet and the outlet, a triggering member manually movable between a rest position and a release position for opening and closing the valve, a first locking member manually movable between a locking position and an unlocking position for locking the triggering member in the rest position, and a handgrip graspable by the user. In order to further develop the valve gun such that it is easier to handle, the triggering member can be arranged at the rear side of the handgrip that faces away from the outlet, and that the first locking member can be arranged at the front side of the handgrip that faces the outlet.

Abstract: A method for monitoring an operation location of a surface processing apparatus is provided, wherein a surface processing apparatus is allocated to a spatially delimited operation area by way of an allocating unit, and wherein the position of the surface processing apparatus is established, and it is determined whether the surface processing apparatus is disposed inside or outside the operation area. For versatility, the surface processing apparatus is allocated to a first operation area and at least one second operation area that is spatially separated from the first operation area, and it is determinable whether the surface processing apparatus is disposed outside the first operation area but inside the at least one second operation area. Furthermore, the invention relates to a monitoring system for performing the method.

Abstract: A cleaning tool for a floor cleaning appliance is provided, including a main body carrying a cleaning cover which is subject to wear, and including a signal transmitter which provides a wireless signal in dependence upon the degree of wear of the cleaning cover. To be able to detect in a cost-effective manner when a maximum admissible degree of wear of the cleaning cover is reached, the signal transmitter is of rigid construction and fixed to a movable carrying part, the carrying part being held on the main body and being movable from a normal position to an evasive position against a restoring force, the carrying part protruding further from the main body in the normal position than in the evasive position, and the carrying part and/or the signal transmitter contacting the floor surface to be cleaned when a maximum admissible degree of wear of the cleaning cover is reached.

Abstract: A self-propelled surface cleaning machine is proposed, including a floor cleaning device, a steerable front wheel, a steering device associated with the front wheel, a rear wheel device having at least one left rear wheel and at least one right rear wheel, a first drive device for driving the front wheel, a second drive device for driving the rear wheel device and a differential device for the rear wheel device that allows different speeds of rotation for the at least one left rear wheel and the at least one right rear wheel.

Abstract: A manually guided floor cleaning machine is provided, including a chassis with a front end and a rear end in relation to a straight ahead forward travel direction, a wheel arrangement, which is arranged on the chassis in the region of the rear end, and a cleaning head, which is pivotably arranged on the chassis in the region of the front end, wherein there is provided a steering rod device, which is articulated on the cleaning head, which is supported on the chassis and which extends upwardly in a direction away from the chassis toward the rear end.

Abstract: A piston pump for a high-pressure cleaning appliance is provided, which includes a plurality of pistons that are movable back and forth and each of which enters a pump chamber and is displaceably held at a piston guiding part. The piston guiding part has a supporting wall on which a plurality of guiding elements, each of which guides a piston, are disposed. In order to be able to produce the piston pump in a more cost-effective manner, it is proposed according to the invention that the supporting wall is curved.

Abstract: A dirt pick-up device for a floor cleaner is provided, including a carrying part fixable to the floor cleaner and a holding part releasably connectable to the carrying part with a suction strip held on the holding part, the carrying part and the holding part locked to each other by a locking device, the dirt pick-up device including an actuating element which is transferable from an unactuated position to an actuated position for transferring the locking device to an unlocked position in which the holding part is releasable from the carrying part. The dirt pick-up device can include or form a grip element held on at least one of the holding part and the suction strip, and in the unactuated position, the actuating element can be at a greater distance from the grip element than in the actuated position. A floor cleaner with a dirt pick-up device is also provided.

Abstract: A heat exchanger for heating a liquid is provided, in particular, for high-pressure cleaners, including an inner and an outer heating coil which each have a plurality of turns, and including spacers which are arranged between the inner heating coil and the outer heating coil and are distributed over the circumference of the inner heating coil. To develop the heat exchanger in such a way that it can be manufactured more cost-effectively and is highly efficient, at least one turn of the outer heating coil includes between two spacers immediately adjacent to each other a first turn section in which the radial spacing from the inner heating coil is smaller or larger than in the region of the spacers. Two methods for manufacturing such a heat exchanger are also provided.

Abstract: A self-propelled, self-steering floor cleaning appliance is provided with at least one cleaning element for cleaning a floor surface, including a drive device having an undercarriage, a sensing part for sensing obstacles, at least one displaceable holding part for holding the sensing part on the floor cleaning appliance and at least one detection element for detecting a displacement of the at least one holding part and for providing a signal relating thereto. The floor cleaning appliance includes at least one accommodating part on which the at least one holding part is held so as to be displaceable in a first and a second direction of displacement, which is aligned at an angle to the first direction of displacement, and the at least one detection element is actuatable by the at least one holding part upon displacement of the holding part in the first and in the second directions of displacement.

Abstract: The invention relates to a cleaning brush for a floor cleaner, in particular, a self-propelled and self-steering floor cleaner, including at least one brush unit having a brush body defining a brush axis and being provided with cleaning bristles and having a first end and a second end, the at least one brush unit including at the first end or in the region of the first end a torque receiver device for coupling with a drive device of the floor cleaner. To provide such a cleaning brush which can be reliably mounted on a floor cleaner in a constructionally simple way, the at least one brush unit includes a bearing device for mounting on the floor cleaner, which is arranged between the first end and the second end. The invention also relates to a floor cleaner with a cleaning brush, in particular, a self-propelled and self-steering floor cleaner.

Abstract: A power supply arrangement for a suction device is provided, which is optionally operable using direct current or alternating current, including a first connection connectible to a direct current source, a second connection connectible to an alternating current source, a third connection connectible to a consuming unit of the suction device, an electrically isolated converter connected on the input side to the first connection, and a switchover device connected to an output of the converter, the second connection and to the consuming unit, wherein the switchover device allows selection of whether the consuming unit is actively connected to the converter or the second connection for power supply, and wherein the switchover device has one or more components each with an electrical safety clearance that is at least 4 mm in respect of the creepage distance and the total of the creepage distances of the components is at least 8 mm.

Abstract: A floor cleaning apparatus is provided, including a dirt collection device for picking up dirty liquid from a floor surface to be cleaned as well as a dirty liquid tank, into which the dirty liquid can be transferred. In order to provide a floor cleaning apparatus of this type, which can be handled in a more user-friendly manner, it is proposed that the floor cleaning apparatus has a tank rinsing mechanism with at least one rinsing line, which includes at least one inlet opening for rinsing liquid, which can be provided for the tank rinsing mechanism, as well as at least one outlet opening for delivering rinsing liquid into an interior of the dirty liquid tank.

Abstract: The invention relates to an apparatus for producing CO2 pellets from CO2 snow, in particular, for a cleaning device for spraying surfaces to be treated with a mixed stream of a pressurized gas and CO2 pellets, includes a compressor device for compressing CO2 snow to form CO2 pellets. The compressor device includes a gear compressor. The gear compressor includes at least one compressor wheel which is mounted rotatable about a first rotation axis and has a plurality of compressing elements, and includes at least one intake wheel which has a plurality of snow intakes for accepting CO2 snow. The snow intakes are configured corresponding to the compressing elements. The intake wheel is mounted rotatable about a second rotation axis and cooperates with the at least one compressor wheel. The intake wheel includes an intake wheel sleeve with an intake wheel sleeve wall.

Abstract: A vehicle washing installation having two stands on which a nozzle beam with a plurality of high-pressure nozzles is held so as be adjustable in height is provided. The nozzle beam is surrounded by a protective body extending along the nozzle beam and having at least one outlet opening for cleaning liquid, the protective body being adjustable in height together with the nozzle beam and being movable relative to the nozzle beam upon striking an obstacle, the movement of the protective body relative to the nozzle beam being detectable by a sensor assembly in order to provide a control signal.

Abstract: A vacuum cleaner is provided, including a suction inlet, a dirt collection container, a filter device, a suction conduit, a suction unit, wherein the dirt collection container is in flow communication with the suction unit via the filter device and the suction conduit and wherein the filter device has a negative pressure applied to it by the suction unit, and including an external air valve device, wherein the filter device is capable of having external air applied thereto on the clean side thereof via the external air valve device and wherein for cleaning the filter device the external air valve device is capable of being brought from a closed valve position to an open valve position and back again from the open valve position to a closed valve position, characterized by a battery device for supplying energy to the external air valve device.

Abstract: A piston pump for a high-pressure cleaning appliance is provided, including a pump block having a plurality of pump chambers, into each of which one piston plunges, and including a pump head having a suction inlet and a pressure outlet, each pump chamber in flow connection via a suction valve with the suction inlet and via a pressure valve with the pressure outlet, and including a clamping bracket engaging around the pump head. The piston pump can have a single U-shaped clamping bracket oriented symmetrically in relation to the longitudinal pump axis, and the pump head and the pump block form between them downstream of the pressure valves a pressure chamber in which a central, piston-like insert part is arranged, the insert part being surrounded by a sealing element and having a passage, and a pressure line oriented coaxially with the longitudinal pump axis being arranged downstream of the passage.