# US 9,038,781 B2 · Elevator and arrangement for emergency stopping an elevator car > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,038,781 B2 - Document ID: US9038781B2 - Status: Granted - Kind: B2 - Application number: 12/230,836 - Filed: 2008-09-05 - Published: 2009-09-10 - Granted: 2015-05-26 - Earliest claimed: 2006-04-04 - Assignees: Kone Corporation - Applicants: Jorma Mustalahti; Esko Aulanko - Inventors: Jorma Mustalahti; Esko Aulanko - Web page: https://patentgrep.com/patent/US9038781B2 ## CPC - B66B 11/043: {actuated by rotating motor; Details, e.g. ventilation (roping on drum, sheave, winch or pulley B66B11/0065; power supply or control B66B1/28, H02P; motor construction H02K)} - B66B 11/08: with hoisting rope or cable operated by frictional engagement with a winding drum or sheave {(B66B11/008 takes precedence)} - F16D 41/066: all members having the same size and only one of the two surfaces being cylindrical - B66B: ELEVATORS; ESCALATORS OR MOVING WALKWAYS ({apparatus for raising or lowering persons on theatrical stages or the like A63J5/12} ; funicular railbound systems with rigid ground-supported tracks and cable traction, e.g. cliff railways, B61B9/00; arrangements of ammunition handlers in vessels B63G3/00; hoists, lifts, or conveyors for loading or unloading in general B65G; braking or detent devices controlling normal movements of winding drums or barrels B66D; ship-lifting devices E02C; garages for many vehicles with mechanical means for lifting vehicles E04H6/12; hoists for feeding ammunition or projectiles to launching apparatus or to loading mechanisms F41A9/00) - F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES ## Abstract An elevator may include an elevator car, a set of hoisting ropes, a hoisting machine, a traction sheave, and a brake. The elevator car may be suspended on the hoisting ropes. The hoisting machine may drive the traction sheave to move the elevator car using the hoisting ropes. The brake may include a brake wheel and brake shoes. The brake may exert an effect on rotation of the traction sheave. During braking, the effect of the brake on the rotation of the traction sheave may depend on a direction of rotation of the traction sheave. The effect of the brake on the rotation of the traction sheave may be greater when the direction of rotation of the traction sheave during braking corresponds to the elevator car moving downward than when the direction of rotation of the traction sheave during braking corresponds to the elevator car moving upward. ## Claims ### Claim 1 An arrangement for stopping an elevator car of an elevator, the elevator comprising the elevator car, a set of hoisting ropes, a hoisting machine, a traction sheave, and a brake that exerts an effect on rotation of the traction sheave, wherein the elevator car is suspended on the set of hoisting ropes, wherein the hoisting machine drives the traction sheave to move the elevator car using the set of hoisting ropes, and wherein the brake comprises a brake wheel and brake shoes, the arrangement comprising: a device configured to control the effect of the brake on the rotation of the traction sheave depending on a direction of rotation of the traction sheave; wherein during normal braking operation, the device is engaged when the elevator car is moving upward, wherein during emergency braking operation the device is not engaged when the elevator car is moving upward, and wherein the device is inside a rim of the traction sheave. ### Claim 2 (depends on 1) The arrangement of claim 1, wherein the device is a one-way clutch. ### Claim 3 (depends on 2) The arrangement of claim 2, wherein the one-way clutch comprises: an inner ring; and one or more wedge elements; wherein when the hoisting machine is rotating an axle of the traction sheave, the one or more wedge elements are configured to wedge between an outer surface of the inner ring and an inner surface of the traction sheave in order to rotate the traction sheave. ### Claim 4 (depends on 3) The arrangement of claim 3, wherein each of the one or more wedge elements comprises a spring-loaded roller. ### Claim 5 (depends on 4) The arrangement of claim 4, wherein each spring-loaded roller is configured to be urged toward the inner surface of the traction sheave. ### Claim 6 (depends on 3) The arrangement of claim 3, wherein the inner ring comprises: a plurality of cogs; wherein pockets are formed between the cogs, and wherein the one or more wedge elements are in the pockets. ### Claim 7 (depends on 3) The arrangement of claim 3, wherein each of the one or more wedge elements comprises a friction element. ### Claim 8 (depends on 1) The arrangement of claim 1, wherein during the emergency braking operation, the device is configured to allow the traction sheave to continue rotating when the brake is engaged and the elevator car is moving upward. ### Claim 9 (depends on 1) The arrangement of claim 1, wherein when the hoisting machine is rotating an axle of the traction sheave, the device is configured to wedge against an inner surface of the traction sheave in order to rotate the traction sheave. ### Claim 10 (depends on 1) The arrangement of claim 1, wherein the effect of the brake on the rotation of the traction sheave is greater when the direction of the rotation of the traction sheave during braking corresponds to the elevator car moving downward than when the direction of the rotation of the traction sheave during the braking corresponds to the elevator car moving upward. ### Claim 11 An elevator, comprising: an elevator car; a set of hoisting ropes; a hoisting machine; a traction sheave; a brake that exerts an effect on rotation of the traction sheave; and a device configured to control the effect of the brake on the rotation of the traction sheave depending on a direction of the rotation of the traction sheave; wherein the elevator car is suspended on the set of hoisting ropes, wherein the hoisting machine drives the traction sheave to move the elevator car using the set of hoisting ropes, wherein the brake comprises: a brake wheel; and brake shoes; wherein during normal braking operation the device is engaged when the elevator car is moving upward, wherein during emergency braking operation the device is not engaged when the elevator car is moving upward, and wherein when the hoisting machine is rotating an axle of the traction sheave, the device is configured to wedge against an inner surface of the traction sheave in order to rotate the traction sheave. ### Claim 12 (depends on 11) The elevator of claim 11, wherein during the emergency braking operation, the device is configured to allow the traction sheave to continue rotating when the brake is engaged and the elevator car is moving upward. ### Claim 13 (depends on 11) The elevator of claim 11, wherein the effect of the brake on the rotation of the traction sheave is greater when the direction of the rotation of the traction sheave during braking corresponds to the elevator car moving downward than when the direction of the rotation of the traction sheave during the braking corresponds to the elevator car moving upward. ### Claim 14 An elevator, comprising: an elevator car; a set of hoisting ropes; a hoisting machine; a traction sheave; a brake that exerts an effect on rotation of the traction sheave; and a device configured to control the effect of the brake on the rotation of the traction sheave depending on a direction of the rotation of the traction sheave; wherein the elevator car is suspended on the set of hoisting ropes, wherein the hoisting machine drives the traction sheave to move the elevator car using the set of hoisting ropes, wherein the brake comprises: a brake wheel; and brake shoes; wherein during normal braking operation the device is engaged when the elevator car is moving upward, wherein during emergency braking operation the device is not engaged when the elevator car is moving upward, and wherein the device is a one-way clutch. ### Claim 15 (depends on 14) The elevator of claim 14, wherein the one-way clutch comprises: an inner ring; and one or more wedge elements; wherein when the hoisting machine is rotating an axle of the traction sheave, the one or more wedge elements are configured to wedge between an outer surface of the inner ring and an inner surface of the traction sheave in order to rotate the traction sheave. ### Claim 16 (depends on 15) The elevator of claim 15, wherein the inner ring comprises: a plurality of cogs; wherein pockets are formed between the cogs, and wherein the one or more wedge elements are in the pockets. ### Claim 17 (depends on 15) The elevator of claim 15, wherein each of the one or more wedge elements comprises: a spring-loaded roller; or a friction element. ### Claim 18 (depends on 14) The elevator of claim 14, wherein the effect of the brake on the rotation of the traction sheave is greater when the direction of the rotation of the traction sheave during braking corresponds to the elevator car moving downward than when the direction of the rotation of the traction sheave during the braking corresponds to the elevator car moving upward. ### Claim 19 (depends on 14) The elevator of claim 14, wherein during the emergency braking operation, the device is configured to allow the traction sheave to continue rotating when the brake is engaged and the elevator car is moving upward. ### Claim 20 (depends on 14) The elevator of claim 14, wherein when the hoisting machine is rotating an axle of the traction sheave, the device is configured to wedge against an inner surface of the traction sheave in order to rotate the traction sheave.