An automatic toothbrush (100), including: a body (102) having opposed ends, a cavity (105) situated between the opposed ends, and an opening (107) situated at one of the opposed ends; an output shaft (120) having first and second ends (124, 122) and extending through the opening such that the second end (122) is outside of the cavity, the output shaft having a plurality of bends (139, 141, 143,145) situated between the second end and the opening; and an oral cleaning tool (104) configured to be press fit onto that portion of the shaft which has the plurality of bends.

An automatic toothbrush (100), including: a body (102) having opposed ends, a cavity (105) situated between the opposed ends, and an opening (107) situated at one of the opposed ends; an output shaft (120) having first and second ends (124, 122) and extending through the opening such that the second end (122) is outside of the cavity, the output shaft having a plurality of bends (139, 141, 143,145) situated between the second end and the opening; and an oral cleaning tool (104) configured to be press fit onto that portion of the shaft which has the plurality of bends.

A telescopic piston and crankshaft assembly includes a crankshaft that has a plurality of rod journals. Each of the rod journals has a center portion and a pair of lateral portions. The center portion is offset from each of the lateral portions with respect to an axis of rotation extending through the crankshaft. The center portion leads the lateral portions when the crankshaft is rotated. A plurality of piston units is each rotatably coupled to the crankshaft. Each of the piston units has an outer section and an inner section. The outer section of each of the piston units is rotatably coupled to each of the lateral portions of an associated one of the rod journals. The inner section of the piston units is rotatably coupled to the center portion of an associated one of the rod journals. The inner section leads the outer section when the crankshaft rotates.

A telescopic piston and crankshaft assembly includes a crankshaft that has a plurality of rod journals. Each of the rod journals has a center portion and a pair of lateral portions. The center portion is offset from each of the lateral portions with respect to an axis of rotation extending through the crankshaft. The center portion leads the lateral portions when the crankshaft is rotated. A plurality of piston units is each rotatably coupled to the crankshaft. Each of the piston units has an outer section and an inner section. The outer section of each of the piston units is rotatably coupled to each of the lateral portions of an associated one of the rod journals. The inner section of the piston units is rotatably coupled to the center portion of an associated one of the rod journals. The inner section leads the outer section when the crankshaft rotates.

A bearing arrangement includes a shaft with an outer circumferential supporting surface, and a mounting device with an inner circumferential supporting surface. The mounting device supports the shaft in a rotatable manner using a bearing structure. At least one tiltable sleeve member is arranged between at least one of the supporting surfaces and the bearing structure.

Embodiments of the disclosure relate generally to shaft devices and, more particularly, to a shaft device having at least one portion that is radially distanced from a longitudinal axis of the shaft device. In one embodiment, the invention provides a first aspect of the disclosure provides a shaft assembly for movement of a plurality of adjustable members, the shaft assembly comprising: an elongate shaft body having: a first end; a second end; a first portion oriented substantially along a longitudinal axis of the elongate shaft body; and a second portion oriented substantially parallel to and radially displaced from the longitudinal axis of the elongate shaft body; and a plurality of attachment devices disposed along an outer surface of the elongate shaft body.

Embodiments of the disclosure relate generally to shaft devices and, more particularly, to a shaft device having at least one portion that is radially distanced from a longitudinal axis of the shaft device. In one embodiment, the invention provides a first aspect of the disclosure provides a shaft assembly for movement of a plurality of adjustable members, the shaft assembly comprising: an elongate shaft body having: a first end; a second end; a first portion oriented substantially along a longitudinal axis of the elongate shaft body; and a second portion oriented substantially parallel to and radially displaced from the longitudinal axis of the elongate shaft body; and a plurality of attachment devices disposed along an outer surface of the elongate shaft body.

A balance shaft for balancing forces of inertia and/or moments of inertia of a reciprocating-piston internal combustion engine, including: at least one elongate main body; at least one bearing seat, disposed on the elongate main body for the mounting of a radial bearing. In the center point of the bearing seat there is provided the rotational axis of the balance shaft. The elongate main body may be formed of an integral tubular element, and the center of mass of the elongate main body may lie outside the rotational axis of the balance shaft.

A balance shaft for balancing forces of inertia and/or moments of inertia of a reciprocating-piston internal combustion engine, including: at least one elongate main body; at least one bearing seat, disposed on the elongate main body for the mounting of a radial bearing. In the center point of the bearing seat there is provided the rotational axis of the balance shaft. The elongate main body may be formed of an integral tubular element, and the center of mass of the elongate main body may lie outside the rotational axis of the balance shaft.

A balance shaft for balancing forces of inertia and/or moments of inertia of a reciprocating-piston internal combustion engine, including: at least one elongate main body; at least one bearing seat disposed on the elongate main body, for the mounting of a radial bearing, wherein in the center point of the bearing seat is provided the rotational axis of the balance shaft. On the elongate main body is provided at least one unbalance portion the center of mass of which lies outside the rotational axis of the balance shaft. On the at least one unbalance portion substantially no material is provided in the region of the rotational axis of the balance shaft. A method for producing such a balance shaft is also provided.