A carriage (1) for a stairlift is configured for sliding along a support guide (2). The carriage (1) comprises a concave shaped frame (101), defining a seat (S) for housing at least a part of said guide (2); at least one upper roller (102), mounted on an upper portion of said frame (101) to be rotatably engageable resting on an upper surface of a head portion (201) of the guide (2); a rolling member (103), mounted on a lower portion of the frame (101) to be rotatably engageable with a lower surface of a base portion (203) of the guide (2); and first and second lower rollers (104a, 104b), mounted on the frame (101) in the proximity of the rolling member (103) in such a way as to be engaged or can be engaged in rolling movement respectively on a first lateral surface (203a) and a second lateral surface (203b) of the base portion (203) of the guide (2).

Systems, apparatuses, and methods are described for a stairlift overspeed safety system are disclosed. The overspeed safety system may include a centripetal cam assembly, a trigger assembly, and a jammer assembly. The centripetal cam assembly may include a spring-loaded plate and a plurality of centripetal cams connected to the spring-loaded plate, configured to move to an extended position when the rail speed exceeds the speed threshold. The trigger assembly may include a trigger plate configured to be pushed by at least one of the centripetal cams when moved to the extended position. Pushing the trigger plate may cause a switch to open to shut off power to the motorized stairlift. The jammer assembly may include a jammer configured to wedge between teeth of a rack and pinion of the motorized stairlift to initiate a deceleration to stop movement of the motorized stairlift.

Systems, apparatuses, and methods are described for a stairlift overspeed safety system are disclosed. The overspeed safety system may include a centripetal cam assembly, a trigger assembly, and a jammer assembly. The centripetal cam assembly may include a spring-loaded plate and a plurality of centripetal cams connected to the spring-loaded plate, configured to move to an extended position when the rail speed exceeds the speed threshold. The trigger assembly may include a trigger plate configured to be pushed by at least one of the centripetal cams when moved to the extended position. Pushing the trigger plate may cause a switch to open to shut off power to the motorized stairlift. The jammer assembly may include a jammer configured to wedge between teeth of a rack and pinion of the motorized stairlift to initiate a deceleration to stop movement of the motorized stairlift.

A mechanically-based arrangement for locking a stairlift chair relative to a stairlift carriage in the event of a failure within the drive that is provided to maintain the chair level as the stairlift is in operation. The arrangement uses inter-engaging components that are engaged and dis-engaged in timed relationship to rotation of the levelling motor. At all times at least one set of inter-engaging components are engaged.

A stairlift with an elongated rail includes a first side running surface and a second side running surface; and a carriage movable along the rail. The carriage having a first roller including a first roller friction surface which is in frictional engagement with the first side running surface for guiding the first roller; and a second roller including a second roller friction surface which is in frictional engagement with the second side running surface for guiding the second roller; and a first bridge. The first roller being rotatable around a first axis at a first end of the first bridge and the second roller is being rotatable around a second axis at a second end of the first bridge.

A stairlift for moving along a staircase having: a curved rail having a centre line, a load bearing surface, and a carriage including a first and a second guiding unit connected to each other by a connecting unit. The second guiding unit is connected to the connecting unit via a third rotation joint about a third axis and a fourth joint about a fourth axis, the connection unit includes a fifth rotation joint about a fifth axis. The fifth axis extending from outside the rail to an area close to or on the centre line of the rail in a first plane close to or on the third and the fourth axis.

A stairlift for conveying a load along a staircase includes a stairlift guide (stairlift rail), a carriage carried by the stairlift guide and moveable along the stairlift guide, the carriage comprising a carriage drive to drive the carriage along the stairlift guide. A stairlift carriage with reduced energy consumption comprises a body of revolution mounted hingably about a first axis to a frame of the stairlift carriage, while being able to rotate about an axis of rotation at a distance from said first axis.

Systems, apparatuses, and methods are described for a stairlift overspeed safety system are disclosed. The overspeed safety system may include a centripetal cam assembly, a trigger assembly, and a jammer assembly. The centripetal cam assembly may include a spring-loaded plate and a plurality of centripetal cams connected to the spring-loaded plate, configured to move to an extended position when the rail speed exceeds the speed threshold. The trigger assembly may include a trigger plate configured to be pushed by at least one of the centripetal cams when moved to the extended position. Pushing the trigger plate may cause a switch to open to shut off power to the motorized stairlift. The jammer assembly may include a jammer configured to wedge between teeth of a rack and pinion of the motorized stairlift to initiate a deceleration to stop movement of the motorized stairlift.

Systems, apparatuses, and methods are described for a stairlift overspeed safety system are disclosed. The overspeed safety system may include a centripetal cam assembly, a trigger assembly, and a jammer assembly. The centripetal cam assembly may include a spring-loaded plate and a plurality of centripetal cams connected to the spring-loaded plate, configured to move to an extended position when the rail speed exceeds the speed threshold. The trigger assembly may include a trigger plate configured to be pushed by at least one of the centripetal cams when moved to the extended position. Pushing the trigger plate may cause a switch to open to shut off power to the motorized stairlift. The jammer assembly may include a jammer configured to wedge between teeth of a rack and pinion of the motorized stairlift to initiate a deceleration to stop movement of the motorized stairlift.

A knockdown, portable lift is relatively compact and lightweight for transport and use where there is no existing means for lifting a load between a lower surface and an upper surface or where the existing means cannot be used. Components of the lift are stored in a base portion of the lift and are assembled on site for forming a lift frame extending between the upper and lower surfaces. A platform and drive assembly are supported on the lift frame and are driven together up and down tracks on each side of the lift frame using a rotary drive, such as a hand crank or electric motor, to power the drive assembly. The drive assembly is operable by a person on or off the platform from either the upper or lower surface or traversing stairs over which the platform is moving. The drive assembly incorporates a unique overspeed braking system and a unique clutch arrangement.