Abstract: Apparatus comprising: a rotatable drive shaft (12): one or more members (16a-d) mounted for oscillators, pivoting motion: motion conversion means (17, 28a-d, 16a-d) for convening rotational motion of the drive shaft to the oscillatory, pivoting motion of the one or more members: means coupling the or each member and one or more saw blades (14a-f) so that the oscillatory motion of the one or more member causes oscillatory cutting action of the or each blade. There is also provided a saw blade, and a method of attaching a saw blade.

Abstract: A cutting assembly for cutting with at least two saw blades simultaneously, includes a motion conversion means comprises: a first part and a plurality of second parts, for example a first bevel gear (30) and a plurality of second bevel gears (32). The first part is arranged for rotation about a central axis thereof and coupled to a drive means (12) for causing the rotation. The first and second parts are arranged such that the rotation of the first part in a direction of rotation causes rotation in a corresponding direction of rotation of each second part about a respective axis extending away from the central axis of the first part. The cutting assembly also includes, for each second part, a coupling means for coupling the second part to a respective cutting blade (100a-f) and including a further motion conversion means, such that the rotation of the second part causes cutting motion of the cutting blade.

Abstract: Apparatus for converting rotary motion to linear motion and/or linear motion to rotary motion, comprising: a rotatable piece (24) having a surface, the piece being rotatable about an axis thereof; at least one member (26a-d) having a linking surface (44a-d) facing the surface of the rotatable piece and arranged for restricted movement at least in part laterally relative to the axis of the piece; and located between the surface of the rotatable piece and the or each reciprocating member, means for linking the linking surface of the respective member and the surface of the rotatable piece, wherein the means for linking (30a-d), the surface of the rotatable piece and the linking surface are configured to cooperate so that rotational motion of the rotatable piece causes linear movement of the at least one member, and/or linear movement of the at least one member causes rotational motion of the rotatable piece.

Abstract: Apparatus for converting rotary motion to linear motion and/or linear motion to rotary motion, comprising: a rotatable piece (24) having a surface, the piece being rotatable about an axis thereof; at least one member (26a-d) having a linking surface (44a-d) facing the surface of the rotatable piece and arranged for restricted movement at least in part laterally relative to the axis of the piece; and located between the surface of the rotatable piece and the or each reciprocating member, means for linking the linking surface of the respective member and the surface of the rotatable piece, wherein the means for linking (30a-d), the surface of the rotatable piece and the linking surface are configured to cooperate so that rotational motion of the rotatable piece causes linear movement of the at least one member, and/or linear movement of the at least one member causes rotational motion of the rotatable piece.

Abstract: A fluid machine for a pneumatic or hydraulic drive system, said fluid machine being able to work as a fluid motor or as a fluid pump, comprising: at least two piston assemblies each comprising a piston means (110a-c), the at least two piston assemblies being operable to cause sequential reciprocating movement of the pistons means (110a-c); a drive member (120) rotatable about an axis and providing an annular, wave-like surface (122) extending at least partially radially to the axis, towards which the piston means (110a-c) project, wherein, in case of working as a fluid motor, the pistons means (110a-c) are arranged to drive rotation of the drive member (120) about the axis at least by a pushing action on said wave-like surface (122) or, in the case of working as a fluid pump, the piston means (110a-c) are arranged to cooperate with said wave-like surface (122) so that rotation of the drive member (120) drives sequential reciprocating motion of the piston means (110a-c).

Abstract: Apparatus for converting between rotary motion and linear motion includes a rotatable piece being rotatable about an axis; at least one member having a linking surface facing the rotatable piece and arranged for movement relative to the axis of the piece; and a means for linking the linking surface of the respective member and the surface of the rotatable piece, so that rotational motion of the rotatable piece causes linear movement of the at least one member, and/or linear movement of the at least one member causes rotational motion of the rotatable piece. A sawing device may include said apparatus for cutting by repetitive reciprocating cutting action. A saw blade may be configured for such a sawing device.

Abstract: Hydraulic and pneumatic drive systems and fluid motors (12) and fluid pumps (10) therefor are disclosed. In such systems, rotation motion is converted to reciprocating motion or vice versa. In particular, a motion conversion means comprises a portion extending continuously and circumferentially around a central axis and extending in part longitudinally relative to the central axis, and a linking means, wherein the portion and the linking means are relatively rotatable about the central axis and a one of the linking means and the portion is fixedly coupled to a piston means, wherein the linking means and the portion are configured to cooperate whereby the reciprocating movement of the piston means causes relative rotary motion of the other of the portion and the linking means about said central axis. The other of the portion and the linking means may be coupled to a sleeve means to cause rotation thereof.

Abstract: A dental flosser (2) comprising a tensioning structure (8, 10, 12) for holding a section of a dental floss for flossing. The dental floss (14) is of continuous length and has on said length a plurality of spaced nodes (30) defining a plurality of sections. The tensioning structure is arranged to apply a tensioning action to a pair of nodes on said length to tension the section (14) defined by the pair. The tensioning structure is so arranged so that the section is replaceable with another one of the sections (14b). A method of operating a dental flosser comprises a) operating the dental flosser to at least partially remove a tensioning action acting on each of the pairs of nodes of the section to tension the section, b) removing the section from the position and locating the other section in the position, and c) applying a tensioning action to the pair of nodes defining the other section.

Abstract: Apparatus for converting between rotary motion and linear motion includes a rotatable piece being rotatable about an axis; at least one member having a linking surface facing the rotatable piece and arranged for movement relative to the axis of the piece; and a means for linking the linking surface of the respective member and the surface of the rotatable piece, so that rotational motion of the rotatable piece causes linear movement of the at least one member, and/or linear movement of the at least one member causes rotational motion of the rotatable piece. A sawing device may include said apparatus for cutting by repetitive reciprocating cutting action. A saw blade may be configured for such a sawing device.