SAFETY BRAKE DEVICE AND SAFETY BRAKE METHOD
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United States of America Patent
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Issued Date -
Jun 9, 2022
app pub date -
Mar 13, 2020
filing date -
Mar 13, 2020
priority date (Note) -
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Abstract
The invention relates to a method and a device for safety braking for an elevator (1) having an upright guide rail (3). The safety brake device (4) comprises a housing (5) having braking elements (6, 7) which are arranged on both sides of the guide rail (3) and are movable along the guide rail (3), a safety restraint (8) on both sides between the housing (5) and the braking elements (6, 7), and a clampable and lockable actuating device (9) for the braking elements (6, 7), which unlocks and unclamps in response to a triggering event and brings the braking elements (6, 7) into braking engagement with the guide rail (3). The actuating device (9), when it is unclamped, develops a feed force (F) and feed movement directed transversely to the longitudinal axis (15) of the guide rail (3), which brings the braking elements (6, 7) on both sides into engagement with the guide rail (3) from a laterally distanced initial position, wherein the braking elements (6, 7) are entrained by frictional contact on the guide rail (3) and enter the safety restraint (8), and wherein the actuating device (9) is moved back into its initial position and clamped and locked by the braking elements (6, 7) located in the safety restraint (8).
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