Device and method for actuating an elevator safety brake
AssigneeOtis Elevator Company
InventorsJustin Billard, Daryl J. Marvin
Life of this patent
Estimating the term…
Abstract
A safety device configured to aid in braking movement of a hoisted object is provided including a mounting frame. A brake block is connected to the mounting frame and is operably coupled to a safety brake. An inner block assembly is disposed between the mounting frame and the brake block. The inner block assembly is movable relative to both the mounting frame and the brake block. Upon detection of a predetermined condition, the brake block is configured to engage and adjacent guide member to actuate the safety brake.
Claims17
A safety device configured to aid in braking movement of a hoisted object, comprising:
- a mounting frame;
- a brake block connected to the mounting frame, the brake block being movable both vertically and laterally relative to the mounting frame;
- an inner block assembly disposed between the mounting frame and the brake block, the inner block assembly having a first sloped surface and the brake block having a second sloped surface complementary to and arranged in contact with the first sloped surface, the inner block assembly being movable relative to both the mounting frame and the brake block;
- and
- a safety brake separate from and operably coupled to the brake block by a linkage, the safety brake being operable to apply a braking force to an adjacent guide member to stop movement of the hoisted object, wherein upon detection of a predetermined condition, the brake block is configured to engage the adjacent guide member to actuate the safety brake.
A method of actuating a safety brake of an elevator car, comprising:
- providing a safety device including;
- a mountain frame;
- a brake block connected to the mounting frame, the brake block being moveable both vertically and laterally relative to the mounting frame;
- an inner block assembly disposed between the mounting frame and the brake block, the inner block assembly having a first sloped surface and the brake block having a second sloped surface complementary to and arranged in contact with the first sloped surface, the inner block assembly being movable relative to both the mounting frame and the brake block;
- and
- a safety brake seperate from and operably coupled to the brake block by a linkage, the safety brake being operable to apply a braking force to an adjacent guide member to stop movement of the hoisted object;
- detecting an over-speed condition;
- moving the brake blockinto engagement with a guide member;
- and
- applying a force to the safety brake via the brake block such that the safety brake engages the guide member to stop movement of the elevator car.
Dependencies are inferred from the claim text.