# US 9,038,800 B2 · Clutch assembly > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,038,800 B2 - Document ID: US9038800B2 - Status: Granted - Kind: B2 - Application number: 13/635,184 - Filed: 2011-03-15 - Published: 2013-06-06 - Granted: 2015-05-26 - Earliest claimed: 2010-03-15 - Assignees: Automatic Technology (Australia) Pty Ltd - Applicants: Toan Dang - Inventors: Toan Dang - Web page: https://patentgrep.com/patent/US9038800B2 ## CPC - F16D 11/14: with clutching members movable only axially (F16D11/02, F16D11/08 take precedence) - E06B 9/322: Details of operating devices, e.g. pulleys, brakes, spring drums, drives ({operating devices E06B9/68} ; devices of general interest specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material B65H75/34) - E06B 9/42: Parts or details of roller blinds, e.g. suspension devices, blind boxes (brackets or adjustable mountings for roller blinds and drawable curtains A47H1/13) - E06B 9/74: adapted for selective electrical or manual operation - E05F 15/603: using rotary electromotors - E05Y 2201/216: Clutches - E05Y 2201/244: by manual operation - E05Y 2800/426: against unauthorised use, e.g. keys - E05Y 2900/00: Application of doors, windows, wings or fittings thereof - E05Y 2900/106: for garages - E05Y 2900/132: Doors - E05Y 2900/146: Shutters - E06B 2009/785: {by belts, straps, bands, tapes, cords, tassels} - F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES - E06B: FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES (shades or blinds for greenhouses A01G9/22; curtains A47H; lids for car boots or bonnets B62D25/10; skylights E04B7/18; sunshades, awnings E04F10/00) - E05F: DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING - E05Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF ## Abstract The invention relates to a clutch assembly (8) for providing selective engagement with a rotatable shaft, in particular for selecting between manual and powered driving of an output drive such as a door, shutter or gate. The clutch assembly (8) comprises a stop (16) arranged to rotate with the shaft (18), a cam (20) arranged to move relative to the shaft (18), and a follower (24) arranged to rotate around the shaft (18) and axially movable along the shaft in and out of engagement with the stop (16). The follower (24) is operatively associated with the cam (20) so that movement of the follower relative to the cam brings the follower into engagement with the stop (16) by axial movement, so causing rotation of the shaft (18). ## Claims ### Claim 1 A clutch assembly for providing selective engagement with a rotatable shaft, the assembly comprising: a stop arranged to rotate with the shaft; a cam arranged to move relative to the shaft; a follower arranged for selective operation so to be simultaneously rotatable relative to the shaft and axially movable along the shaft in and out of engagement with the stop; wherein the follower is operatively associated with the cam so that rotational movement of the follower about the shaft brings the follower into engagement with the stop by axial movement of the follower, so causing rotation of the shaft. ### Claim 2 (depends on 1) A clutch assembly according to claim 1, wherein the cam is arranged to rotate relative to the shaft, and the assembly is configured such that the cam remains substantially stationary as the follower moves towards engagement with the stop. ### Claim 3 (depends on 2) A clutch assembly according to claim 2, the assembly configured such that, once the follower is engaged with the stop, further rotation of the follower results in rotation of the cam with the follower. ### Claim 4 (depends on 3) A clutch assembly according to claim 3, the assembly configured and dimensioned such that, when the follower engages with the stop, torque is applied by the follower to the cam to rotate the cam about the shaft. ### Claim 5 (depends on 2) A clutch assembly according to claim 2, wherein the assembly includes friction means arranged to restrain movement of the cam about the shaft until further axial movement of the follower is prevented by engagement with the stop. ### Claim 6 (depends on 2) A clutch assembly according to claim 2, wherein the cam includes a surface arranged for frictional engagement with a complementary stationary face of the assembly. ### Claim 7 (depends on 6) A clutch assembly according to claim 6, wherein the complementary stationary face of the assembly comprises one or more spring loaded plunger units arranged so to register with one or more respective recesses formed within the surface of the cam. ### Claim 8 (depends on 2) A clutch assembly according to claim 2, wherein axial movement of the cam along the shaft is limited by a retaining assembly. ### Claim 9 (depends on 8) A clutch assembly according to claim 8, wherein the retaining assembly includes a biasing element, arranged to act on the cam in an axial direction. ### Claim 10 (depends on 2) A clutch assembly according to claim 2, wherein the follower comprises a chain pulley wheel arranged for engaging with a manual device so that the follower may be rotated manually. ### Claim 11 (depends on 2) A clutch assembly according to claim 2, wherein the assembly comprises a biasing element for resiliently biasing the follower away from engagement with the stop. ### Claim 12 (depends on 2) A clutch assembly according to claim 2, wherein the cam is arranged to provide a camming surface shaped to urge the follower axially toward the stop when there is relative movement between the follower and the cam. ### Claim 13 (depends on 12) A clutch assembly according to claim 12, wherein the follower has a face shaped to conform substantially with the camming surface. ### Claim 14 (depends on 13) A clutch assembly according to claim 13, wherein the camming surface is shaped having at least one peak and at least one trough region. ### Claim 15 (depends on 2) A clutch assembly according to claim 2, wherein the cam and follower are provided with complementary abutment portions configured to mutually engage for driving of the cam by the follower. ### Claim 16 (depends on 2) A clutch assembly according to claim 2, wherein the follower and the stop comprise complementary teeth and recesses, the engagement of the follower with the stop involving interaction of the teeth and recesses.