Safety brake and method for unlocking a safety brake
AssigneeInventio AG
InventorsJosef A. Muff, Karsten Gensicke, Reinhard Wöbcke
Life of this patent
Estimating the term…
Abstract
A safety brake for the load receiving portion of an elevator includes a fixing device that is displaceable relative to the load receiving portion in the direction of the guide rail between two abutments fastened to the load receiving portion. The unlocking of the safety brake after a braking process is achieved by moving the load receiving portion with the assistance of the elevator drive unit oppositely to the direction of movement before the braking process, so that one of the abutments fastened to the load receiving portion strikes the fixing device to unlock it from the guide rail.
Claims12
A safety brake for a load receiving means of an elevator, the load receiving means being guided for movement along at least one guide rail, comprising:
- a means for fixing operable between a locked state and an unlocked state and at least one abutment, said means for fixing and said at least one abutment being spaced apart and movable relative to one another, wherein when the safety brake is attached to a load receiving means, said means for fixing fixes the load receiving means to an associated guide rail in said locked state and movement of the load receiving means in a predetermined direction causes said abutment to strike said means for fixing changing said means for fixing from said locked state to said unlocked state to release the load receiving means from the guide rail.
A safety brake for a load receiving means of an elevator, the load receiving means being guided for movement along at least one guide rail, comprising:
- a means for fixing operable between a locked state and an unlocked state, said means for fixing being positioned between an upper abutment and a lower abutment, said abutments being fixed relative to one another and movable relative to said means for fixing, wherein when said means for fixing is attached to a load receiving means, said means for fixing fixes the load receiving means to an associated guide rail in said locked state, and wherein movement of the load receiving means in a downward direction causes said upper abutment to strike against said means for fixing and movement of the load receiving means in an upward direction causes said lower abutment to strike against said means for fixing, said means for fixing being responsive to said striking to change from said locked state to said unlocked state.
A method for unlocking a safety brake for a load receiving means of vertical conveying equipment after a braking process comprising the steps of:
- a. providing a means for fixing connected with the load receiving means and displaceable relative to the load receiving means within a limited displacement path, the means for fixing being in a locked state fixed to a guide rail as a result of the braking process;
- b. providing a pair of abutments fixedly connected with the load receiving means and forming end limits of the displacement path;
- and
- c. moving the load receiving means opposite to a movement direction before the braking process until one of the abutments strikes against the means for fixing to change the means for fixing to an unlocked state.
Dependencies are inferred from the claim text.