# US 10,246,295 B2 · Protective device for speed sensing device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,246,295 B2 - Document ID: US10246295B2 - Status: Granted - Kind: B2 - Application number: 15/092,244 - Filed: 2016-04-06 - Published: 2017-10-12 - Granted: 2019-04-02 - Earliest claimed: 2016-04-06 - Assignees: Otis Elevator Company - Applicants: Otis Elevator Company - Inventors: Guohong Hu; Daryl J. Marvin - Web page: https://patentgrep.com/patent/US10246295B2 ## CPC - B66B 5/044: {Mechanical overspeed governors} - B66B 5/0031: {for safety reasons} - B66B 5/04: for detecting excessive speed - B66B 5/16: Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well - B66B 5/18: and applying frictional retarding forces - B66B 5/22: by means of linearly-movable wedges (B66B5/24 takes precedence) - B66B 9/00: Kinds or types of lifts in, or associated with, buildings or other structures (characterised by control systems B66B1/00; apparatus for raising or lowering persons on stages of theatres A63J5/12) - 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) ## Abstract A safety actuation assembly for an elevator system including a housing, a speed sensing device disposed within the housing, wherein the speed sensing device comprises a proximal end, and a protection device disposed within the housing and located adjacent to the proximal end of the speed sensing device; the protection device configured to be placed in a first position when in a non-engaging position and in a second position when in an engaging position. ## Claims ### Claim 1 An elevator system having a safety actuation assembly comprising: a housing; a speed sensing device for sensing the speed of the elevator system disposed within the housing, wherein the speed sensing device comprises a proximal end; and a protection device disposed within the housing and located adjacent to the proximal end of the speed sensing device; wherein the protection device configured to be placed in a first position when in a non-engaging position and a second position when in an engaging position. ### Claim 2 (depends on 1) The safety actuation assembly of claim 1, further comprising a lever operably coupled to the protection device. ### Claim 3 (depends on 2) The safety actuation assembly of claim 2, further comprising a protrusion disposed on the lever. ### Claim 4 (depends on 3) The safety actuation assembly of claim 3, further comprising an elevator component disposed within the housing, the elevator component located adjacent to the protrusion and configured to operate between the engaging position and the non-engaging position. ### Claim 5 (depends on 4) The safety actuation assembly of claim 4, wherein the elevator component is configured to engage the protrusion when placed in the engaging position. ### Claim 6 (depends on 5) The safety actuation assembly of claim 5, wherein the elevator component comprises a braking device. ### Claim 7 (depends on 6) The safety actuation device of claim 6, wherein the braking device comprises: a magnetic braking device; and an electromagnetic component disposed adjacent to the magnetic braking device, wherein the electromagnetic component is configured to hold the magnetic braking device in the non-engaging position. ### Claim 8 The safety actuation device of 2, further comprising a retention device disposed adjacent to the protection device. ### Claim 9 (depends on 1) The safety actuation device of claim 1, wherein the protection device is composed of a foam material. ### Claim 10 An elevator system comprising: a hoistway; a first elevator component disposed within the hoistway and configured to travel within the hoistway; and a safety actuation assembly operably coupled to the first elevator component, the safety actuation assembly comprising: a housing; a speed sensing device disposed within the housing configured to determine a speed of the first elevator component, wherein the speed sensing device comprises a proximal end; a protection device disposed within the housing and located adjacent to the proximal end of the speed sensing device; the protection device configured to be placed in a first position when in a non-engaging position and in a second position when in an engaging position. ### Claim 11 (depends on 10) The elevator system of claim 10, wherein the first elevator component comprises at least one of an elevator car and a counterweight. ### Claim 12 (depends on 10) The elevator system of claim 10, wherein the safety actuation assembly further comprises a lever operably coupled to the protection device. ### Claim 13 (depends on 12) The elevator system of claim 12, wherein the safety actuation assembly further comprises a protrusion disposed on the lever. ### Claim 14 (depends on 13) The elevator system of claim 13, wherein the safety actuation assembly further comprises a second elevator component disposed within the housing, the second elevator component located adjacent to the protrusion and configured to operate between the engaging position and the non-engaging position. ### Claim 15 (depends on 14) The elevator system of claim 14, wherein the second elevator component is configured to engage the protrusion when placed in the engaging position. ### Claim 16 (depends on 15) The elevator system of claim 15, wherein the second elevator component comprises a braking device. ### Claim 17 (depends on 16) The elevator system of claim 16, wherein the braking device comprises: a magnetic braking device; and an electromagnetic component disposed adjacent to the magnetic braking device, wherein the electromagnetic component is configured to hold the magnetic braking device in the non-engaging position. ### Claim 18 (depends on 10) The elevator system of claim 10, wherein the safety actuation assembly further comprises a retention device disposed adjacent to the protection device. ### Claim 19 (depends on 10) The elevator system of claim 10, wherein the protection device is composed of a foam material.