Abstract: 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.

Abstract: A stairlift for conveying a load along a staircase rail includes a rail, a carriage carried by the rail and moveable along the rail, a carriage drive to drive the carriage along the rail, a load carrier support supporting a load carrier, such as a chair or wheelchair platform, which load carrier support is rotatably connected to the carriage to rotate about a horizontal axis, a rotation device to rotate the load carrier support relative to the carriage about the horizontal axis, and a control unit to control the rotation device such that the load carrier support is positioned in a desired orientation relative to a horizontal plane. The rotation device includes a motor and a rotator, where the motor is operatively connected to the load carrier support via the rotator to cause rotation of the load carrier support relative to the carriage about the horizontal axis.

Abstract: 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.

Abstract: A stairlift for conveying a load along a staircase rail includes a rail, a carriage carried by the rail and moveable along the rail, a carriage drive to drive the carriage along the rail, a load carrier support supporting a load carrier, such as a chair or wheelchair platform, which load carrier support is rotatably connected to the carriage to rotate about a horizontal axis, a rotation device to rotate the load carrier support relative to the carriage about the horizontal axis, and a control unit to control the rotation device such that the load carrier support is positioned in a desired orientation relative to a horizontal plane. The rotation device includes a motor and a rotator, where the motor is operatively connected to the load carrier support via the rotator to cause rotation of the load carrier support relative to the carriage about the horizontal axis.

Abstract: A stair lift for transporting a load includes a longitudinal guide having a first side running surface and a second side running surface opposing the first side running surface; and a carriage which is transportable along the guide and provided with rollers for guiding the carriage along the guide. The rollers include a first roller having a first roller peripheral friction surface which is in frictional engagement with the first side running surface for guiding the carriage along the guide and a second roller having a second roller peripheral friction surface which is in frictional engagement with the second side running surface for guiding the carriage along the guide. The first roller friction surface is provided with a first roller member, and the first side running surface is provided with a longitudinal first side running surface member which fits complementary with the first roller member.

Abstract: A stair lift for transporting a load includes a longitudinal guide having a first side running surface and a second side running surface opposing the first side running surface; and a carriage which is transportable along the guide and provided with rollers for guiding the carriage along the guide. The rollers include a first roller having a first roller peripheral friction surface which is in frictional engagement with the first side running surface for guiding the carriage along the guide and a second roller having a second roller peripheral friction surface which is in frictional engagement with the second side running surface for guiding the carriage along the guide. The first roller friction surface is provided with a first roller member, and the first side running surface is provided with a longitudinal first side running surface member which fits complementary with the first roller member.

Abstract: A linear actuator is provided with a cylindrical bore with internal screw thread and accommodated therein a screw means with external screw thread connected to a rod. By turning these parts with respect to each other, a linear movement of the rod can be obtained. The internal space in the housing is sealed to the outside, and preferably filled with a liquid lubricant. Also, there is a space outside the bore which is connected to the space inside the bore and which is at least partially bounded by a resilient, flexible wall part for compensating volume changes in the bore due to the linear movement of the rod.

Abstract: A differential mechanism including a housing, an elongate shaft disposed in the housing which is coupled to an object to be moved with the shaft defining a ring-handed thread along a first portion thereof and a left-handed thread along a second portion thereof. A right-handed nut is mounted on the first portion of the shaft in engagement with the right-handed thread, and a left-handed nut is mounted on the second portion of the shaft in engagement with the left-handed thread, with the right-handed and left-handed nuts being fixedly mounted for independent rotation within the housing, whereby selective rotation and prevention of rotation of said right-handed and left-handed nuts effects rotational and/or translational movement of said shaft relative to said housing.