Andreas Stihl Ag Co. Kg

Cornelius Gindele

Christian Barth

Heiko Rosskamp

Johannes Menzel

Kay-Steffen Gurr

Markus Hittmann

Florian Von Krane

Kirsten Schellin

Klaus Kaupp

Simon Klingler

Thilo Stuerzel

Thomas Hilt

Ulrich Siller

Georg Kröger

Silke Kaminski

Kevin Schäffler

Markus Zauner

Georg Kroeger

Lothar Kotulla

Pietro-Leon Schilling

André Vaas

Uwe Fries

Thilo STÜRZEL

A blower unit for a portable handheld blower apparatus has a housing section and a tubular receiving space, formed in the housing section, with a first axial end and a second axial end and with a longitudinal center axis. Arranged in the receiving space of the housing section is an axial blower for generating a blower air flow, the axial blower being driven by a drive motor. The receiving space has an intake opening at its first axial end and a discharge opening at its second axial end. In order to reduce operating noise, an air guide plate is arranged at an axial distance in front of the intake opening, the air guide plate having external dimensions that are greater than the external dimensions of the intake opening. An annular gap that supplies intake air is formed between the air guide plate and an outer periphery of the housing section.

Blower unit for a handheld blower apparatus

A vacuum/blower device is provided with a drive motor and a fan operatively connected to the drive motor and driven by the drive motor. A switching device is provided that switches the vacuum/blower device from a vacuum operation to a blower operation and from the blower operation to the vacuum operation. A suction pipe with an intake opening is provided, wherein, in the vacuum operation of the vacuum/blower device, a suction air flow is sucked in from the intake opening toward the fan in a first flow direction. The switching device switches a rotational direction of the fan, wherein the fan in the blower operation conveys a blower air flow through the suction pipe in a second flow direction that is oriented from the fan toward the intake opening.

Vacuum / blower device

A backpack power tool has drive motor and blower mounted on a backpack frame. The bottom plate of the backpack frame has a passage for working air sucked in by the blower. Ribs on the bottom side of the bottom plate have end faces forming a contact surface for leaves aspirated in blower operation against the bottom plate. The bottom plate has intake openings positioned between the end faces of the ribs in the contact surface and fluidically connected to the passage. Working air is sucked in through the intake openings and the passage. The bottom plate has an intake surface that is the sum of surfaces of all intake openings and of all end faces of ribs with a width of less than 10 mm positioned between the intake openings. The intake surface amounts to at least 50% of the surface of the bottom side of the bottom plate.

Backpack power tool with a drive motor and a blower driven by the drive motor

A handle for a work apparatus has an actuation member for controlling the rpm of a drive motor of the work apparatus. The actuation member is mounted in the handle and has a pressure surface for the fingers of a user hand. In an initial position, the actuation member protrudes with its pressure surface beyond the grip surface of the handle and, in a position for continuous operation of the motor, has dipped into the grip surface so that the pressure surface of the actuation member lies at the level of the grip surface. A recess extends in the longitudinal direction of the handle and is formed in the grip surface. The recess overlaps the pressure surface of the actuation member so that the actuation member is displaced into the handle via the recess to a boost position whereat the pressure surface lies within the grip surface.

Handle for a work apparatus having a drive motor

A handheld work apparatus has a blower tube with a blower arranged therein. The blower conveys a working air flow through the blower tube and has an impeller rotatably driven by an electric drive motor. A diffuser is mounted in a stationary manner in the blower tube downstream of the impeller. The motor is arranged in a motor compartment in the blower tube. Downstream of the diffuser, the work apparatus has an extraction opening for cooling air for the drive motor, via which an annular space, formed between the blower tube and the motor compartment, is connected to the motor compartment. The motor compartment has an outflow opening for cooling air arranged upstream of the extraction opening. The extraction opening and the outflow opening are arranged so that during operation the pressure at the extraction opening is greater than the pressure at the outflow opening.

Handheld work apparatus having a blower tube

A blower has a blower tube and a fan unit that conveys an air flow through the blower tube. The fan unit has a fan having a fan axis. The fan conveys the air flow in the direction of the fan axis. The air flow exits the blower tube in an outflow direction at a tube aperture. The handle has on its lower side a grasping point, which in the operating position of the blower, lies on a vertical axis through the blower's center of gravity. The tube aperture has a center axis that is oriented in the outflow direction. So that the forces received by the user at the handle during operation can be made smaller, it is provided for the spacing from the center axis of the tube aperture to the grasping point to be smaller than the spacing from the fan axis to the grasping point.

Blower

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Plochingen, Germany

Cornelius Gindele