Elevator safety braking device
OwnerKevin Cunningham, Timothy Toaninventors
Life of this patent
Estimating the term…
Abstract
An elevator safety device for an elevator car, which includes one or more hydraulically-powered braking assemblies mounted on the elevator car and designed to selectively brake on a guide rail of the elevator car upon detection of a predetermined safety condition, including an uncontrolled ascending or unintended movement of the elevator car, prior to actuation of any mechanical safety brake. The safety device may be used with traction-type or hydraulic-type elevators.
Claims13
An elevator safety braking assembly for use with a traction-type or hydraulic elevator car carried by opposing guide rails, designed to work in conjunction with a mechanical safety brake, wherein the mechanical safety brake actuates if one or more predetermined safety conditions are triggered, comprising:
- one or more hydraulically-powered braking assemblies mounted on at least top or bottom cross-rails, or a safety plank, of the elevator car and designed to selectively brake on one or more of the guide rails, whether the elevator is moving upwardly or downwardly and prior to actuation of the mechanical safety brake, upon detection of the one or more predetermined safety conditions, or upon detection of an uncontrolled or unintended movement of the elevator car other than that which would actuate the mechanical safety brake;
- wherein the one or more hydraulically-powered braking assemblies comprise a caliper case housing integrating a piston and brake pad.
Dependencies are inferred from the claim text.