Abstract: A device identifies operating data of a motor-driven tool. The device includes an identifying and/or evaluating device, an operating data memory unit, a communication interface, a housing, and an elastic element. The housing accommodates an electrical energy storage device and has an open and closed condition. In the open condition, the electrical energy storage device is insertable or removable. In the closed condition, the elastic element is configured to fix the electrical energy storage device by applying pressure along the insertion and removal direction of the energy storage device. The force amounts to a value of the mass of the storage device multiplied by at minimum 1 N per g.

Abstract: A filter device, especially intended for incorporation into a fluid reservoir tank, has at least one, preferably exchangeable, filter element (18) having element material (20) through which a fluid can flow from the inside outward, viewed in radial direction, and encompassed by a support tube (36) with passage orifices. The support tube is surrounded with a fluid flow space defined by a housing wall of a housing and has a plurality of passage sites. At least some of the passage orifices in the support tube (36) of the filter element (18) have a flow-directing device (80) that impart a flow direction other than the radial flow direction to the fluid.

Abstract: A filter device, especially intended for incorporation into a fluid reservoir tank, having at least one, preferably exchangeable, filter element (18) having element material (20) through which a fluid can flow from the inside outward, viewed in radial direction, and which is encompassed by a support tube (36) winch has passage orifices and is surrounded, in each case with retention of a definable radial distance and with formation of a fluid flow space, by a housing wall of a housing having a plurality of passage sites, is characterized in that at least some of the passage orifices in the support tube (36) of the filter element (18) have a flow-directing device (80) which flow direction other than the radial flow direction to the fluid.

Abstract: The invention relates to a filter element for filtering fluids, comprising a flat support structure which forms the wall of a support tube (1) which surrounds the exterior and/or interior of a filter medium and has through-flow apertures (5) forming a perforation pattern (3), at least some of the through-flow apertures (5) having a substantially polygonal basic cross-section. The filter clement is characterized in that the polygonal basic cross-section is in each case determined by a plurality of side lines (13) and a plurality of imaginary corners (6) defined in each case by side lines (13) extending in pairs towards one another. In the region of the imaginary corners (6), the two corresponding side lines (13) are connected to one another by a curved line (11).

Abstract: The invention relates to a filter element for filtering fluids, comprising a flat support structure which forms the wall of a support tube (1) which surrounds the exterior of a filter medium and forms a through-flow surface and a marking surface (9), the through-flow surface having through-flow apertures (5) forming a perforation pattern (3) and the marking surface (9) having visibly discernible marking elements (11). The filter element is characterized in that the marking elements (11) are formed in the marking surface (9) by a second perforation pattern (13) which contrasts with the perforation pattern (3) of the through-flow surface in a visibly discernible manner.

Abstract: An air filter housing is provided for an intake air filter for a carburetor of an engine. A clean air receiving chamber is formed in the filter housing and is delimited by a filter element. Opening into the clean air receiving chamber is an intake opening that connects the air filter to the intake channel of the carburetor. A hood-like deflection bowl covers the intake opening in the clean air receiving chamber. The peripheral wall of the deflection bowl has a communicating window disposed transverse to the intake channel and serving for flow connection to the clean air receiving chamber. The communicating window opens into a compensation chamber that is separated from the clean air receiving chamber and communicates therewith via a channel.

Abstract: An air filter housing is provided for an intake air filter for a carburetor of an engine. A clean air receiving chamber is formed in the filter housing and is delimited by a filter element. Opening into the clean air receiving chamber is an intake opening that connects the air filter to the intake channel of the carburetor. A hood-like deflection bowl covers the intake opening in the clean air receiving chamber. The peripheral wall of the deflection bowl has a communicating window disposed transverse to the intake channel and serving for flow connection to the clean air receiving chamber. The communicating window opens into a compensation chamber that is separated from the clean air receiving chamber and communicates therewith via a channel.