Shutoff device
AssigneeSiemens Building Technologies, Inc.
InventorsAlfred Hettel, Axel Obermann
Life of this patent
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Abstract
In a shutoff device, a shutoff body (2) is movable by a drive between abutments (1a, 5b). For the purposes of reducing noise and preventing so-called “valve chatter”, a friction brake (6) is movable with the shutoff body (2) between control bodies (5a; 3d, 3e) at which the friction brake (6) arrives a friction distance (R1, R2) before the time at which the shutoff body (2) reaches each abutment (1a, 5b). The friction brake (6) rubs along a friction surface (3a; 8a) during the movement of the shutoff body (2) along the friction distance (R1, R2). (FIG. 1)
Claims11
A shutoff device having a shutoff body which is movable by a drive between abutments, and a friction brake which is intermittently movable with the shutoff body under the control of at least one control body with which the friction brake makes contact when the shutoff body still has to travel a respective friction distance to each abutment, wherein the friction brake rubs along a friction surface during the movement of the shutoff body along the friction distance.
Dependencies are inferred from the claim text.