Abstract: A hinge construction hingably connects a first member and a second member which are rotatable about an axis of rotation having an axial direction. A first bearing structure comprises first and second support structures having cylinder surface segment shaped first and second bearing surfaces at a radial distance from the axis of rotation, and configured to slidingly engage each other. Second and third bearing structures comprise third, fourth, fifth and sixth support structures having third, fourth, fifth and sixth bearing surfaces, the third and fourth bearing surfaces, and the fifth and sixth bearing surfaces configured to slidingly engage each other to absorb a force having a force component in the axial direction. A fourth bearing structure comprises seventh and eighth support structures having cylinder surface segment shaped seventh and eighth bearing surfaces at a radial distance from the axis of rotation, and configured to slidingly engage each other.

Abstract: A hinge construction hingably connects a first member and a second member which are rotatable about an axis of rotation having an axial direction. A first bearing structure comprises first and second support structures having cylinder surface segment shaped first and second bearing surfaces at a radial distance from the axis of rotation, and configured to slidingly engage each other. Second and third bearing structures comprise third, fourth, fifth and sixth support structures having third, fourth, fifth and sixth bearing surfaces, the third and fourth bearing surfaces, and the fifth and sixth bearing surfaces configured to slidingly engage each other to absorb a force having a force component in the axial direction. A fourth bearing structure comprises seventh and eighth support structures having cylinder surface segment shaped seventh and eighth bearing surfaces at a radial distance from the axis of rotation, and configured to slidingly engage each other.

Abstract: It is described a surgical instrument such as a speculum comprising longitudinally extending cups-shaped pivotably mounted blades manufactured from a moldable material, such as plastic or metal. Each blade has an inwardly curved circumferential edge with an edge face which is provided with a parting line resulting from molding the blades. Negative effects such as possible injuries associated with parting lines or steps can be mitigated by inwardly relocating these lines on an edge face of the inwardly curved circumferential edge.

Abstract: It is described a surgical instrument such as a speculum comprising longitudinally extending cups-shaped pivotably mounted blades manufactured from a mouldable material, such as plastic or metal. Each blade has an inwardly curved circumferential edge with an edge face which is provided with a parting line resulting from moulding the blades. Negative effects such as possible injuries associated with parting lines or steps can be mitigated by inwardly relocating these lines on an edge face of the inwardly curved circumferential edge.

Abstract: The invention relates to a combination of a writing, drawing or marking device with a clamping device for the fastening to or holding together of flat materials among which, but not limited to, sheets of paper. The housing has a predominantly flat character allowing for easy positioning in between a book without this causing large deformations to the book. The combination can also be used as a bookmark device e.g. for use in a book.