초록 ▼

An extracting device (4) for removing material cut away in the operation of a motor-driven hand tool, has an extracting opening (48) and a receiving space (18) for the cut material, which communicate with one another through an extracting path, and an air current generator (42) for generating an air

An extracting device (4) for removing material cut away in the operation of a motor-driven hand tool, has an extracting opening (48) and a receiving space (18) for the cut material, which communicate with one another through an extracting path, and an air current generator (42) for generating an air current (L) from the extracting opening (48) to the receiving space (18). A closure device (20) is provided between the extracting opening (48) and the receiving space (18), which at least substantially places the extracting path in a closed position and which is operated by the air current (L). The closure device (20) is arranged between the extracting opening (48) and the air current generator (42) and the closure device (20) has a closure element (22), which can be removed from a valve seat (24) by means of an underpressure created by the air current generator (42) for forming an open position of the closure device.

대표청구항 ▼

What is claimed is: 1. An extracting device (4) for removing material generated in operation of a motor-driven hand tool, comprising means forming an extracting opening (48) and a receiving space (18) for receiving the material from the extracting opening (48) for flow along an extracting path, an

What is claimed is: 1. An extracting device (4) for removing material generated in operation of a motor-driven hand tool, comprising means forming an extracting opening (48) and a receiving space (18) for receiving the material from the extracting opening (48) for flow along an extracting path, an air current generator (42) located within said means and spaced from extracting opening (48) forming an air current (L) flowing from said extracting opening (48) through said receiving space (18), a closure device (20) located in said means between said extracting opening (48) and said receiving space (18), and operated by said air current (L) and having a closed position at least substantially closing the extracting path, said closure device (20) having a closure element (22) displaceable from a closed position on a valve seat (24) by an underpressure developed by the air current (L) when said air current generator (42) is operating, wherein said closure element (22) forms an end in air extracting chamber (44) open to said air current generator (42), said extracting chamber (44) develops the underpressure when said air current generator (42) is operated, wherein said closure element (22) is displaceable linearly, and wherein an axially extending guide rod (28) is linearly displaceable in said extracting chamber, is connected to said closure element (22) and extends generally parallel to said extraction path. 2. An extraction device, as set forth in claim 1, wherein said closure element (22) is biased by a bellows (34) located within said extracting chamber (44) against said valve seat (24). 3. An extracting device, as set forth in claim 2, wherein said bellows (34) is supported by a spring element (36) for increasing the biasing action of said closure element (22) against said valve seat (24). 4. An extracting device, as set forth in claim 3, where said spring element is a helical spring (36) in engagement with said bellows (34) which is correspondingly helically shaped. 5. An extracting device (4) for removing drilled material generated in operation of a motor-driven hand tool, comprising means forming an extracting opening (48) and a receiving space (18) for receiving the drilled material from the extracting opening (48) for flow along an extracting path; an air current generator (42) located within said means and spaced from extracting opening (48) forming an air current (L) flowing from said extracting opening (48) through said receiving space (18); a closure device (20) located in said means between said extracting opening (48) and said receiving space (18), and operated by said air current (L) and having a closed position at least substantially closing the extracting path, said closure device (20) having a closure element (22) linearly displaceable from a closed position on a valve seat (24) by an underpressure developed by the air current (L) when said air current generator (42) is operating, wherein an axially extending guide rod (28) is linearly displaceable in said extracting chamber, is connected to said closure element (22) and extends generally parallel to said extraction path. 6. An extracting device, as set forth in claim 5, wherein said closure element (22) is conically shaped and tapers inwardly in the direction toward said valve seat (24).