Abstract: A bidirectional magnetic clutch for an additive manufacturing system, comprising a concentric arrangement of an inner drive member (2) and an outer drive member (3) enclosing the inner drive member (2), the inner and outer drive members (2,3) being rotatable relative to each other. The inner drive member (2) comprises at least two outward facing recesses (5, 6) and the outer drive member (3) comprises at least two inward facing recesses (8,9). Each outward facing recess (5,6) comprises a radially moveable roller member (10,11) of ferromagnetic material. The inner drive member (2) further comprises a magnetic biasing system (12) configured to magnetically bias the roller members (10,11) into the outward facing recesses (5,6). The bidirectional magnetic clutch further comprises a magnet actuator (13) at least partially circumferentially arranged around the outer drive member (3) and configured to maintain an engaged state or disengaged state of the bidirectional magnetic clutch.

Abstract: A bidirectional magnetic clutch for an additive manufacturing system, comprising a concentric arrangement of an inner drive member (2) and an outer drive member (3) enclosing the inner drive member (2), the inner and outer drive members (2,3) being rotatable relative to each other. The inner drive member (2) comprises at least two outward facing recesses (5, 6) and the outer drive member (3) comprises at least two inward facing recesses (8,9). Each outward facing recess (5,6) comprises a radially moveable roller member (10,11) of ferromagnetic material. The inner drive member (2) further comprises a magnetic biasing system (12) configured to magnetically bias the roller members (10,11) into the outward facing recesses (5,6). The bidirectional magnetic clutch further comprises a magnet actuator (13) at least partially circumferentially arranged around the outer drive member (3) and configured to maintain an engaged state or disengaged state of the bidirectional magnetic clutch.

Abstract: Wearable support structure assists in at least partly relieving a human body during leaning or bending over includes a frame. The frame has a chest support for bearing upon a chest of the human body, pivoting arrangements for pivoting the support structure in correspondence with the leaning or bending or the human body, and two elongated stays connected to the chest support. The stays extend substantially alongside opposite sides of the human body and connect to the pivoting arrangements. stays are resilient stays arranged such that they are in a stretched state corresponding with an upright position of the human body when being unloaded, and arranged to be biased back to the stretched state when being bent into a bent state corresponding with a leaning or bending position of the human body. The structure further includes a lumbar support and a thigh support.

Abstract: An additive manufacturing system for building three-dimensional objects, comprising a box-shaped build chamber (2) having a plurality of sides (4), and an x-y gantry (10) having mounted thereon a nozzle head assembly (12) for movement thereof relative to the build chamber (2). The additive manufacturing system (1) further comprises a plurality of roller units (14, 16) evenly arranged along a circumference (18) of one side of the plurality of sides (4), wherein each roller unit (14, 16) comprises a cover sheet (20, 22) rolled at least in part into coil form and wherein each cover sheet (20, 22) extends from the roller unit (14, 16) to the nozzle head assembly (12) for closing the build chamber (2) there between. Each roller unit (14, 16) is configured to allow the cover sheet (20, 22) to coil and uncoil in correspondence to the movement of the nozzle head assembly (12).

Abstract: A nozzle for a three-dimensional printing apparatus, comprising a main nozzle body (2) having an inlet end (4), an outlet end (6) and a central conduit (8) arranged there between, wherein the main nozzle body (2) is made of an electrically non-conductive body material. The main nozzle body (2) is provided with an electrically conductive first layer (10) and/or an electrically non-conductive second layer (12) arranged around the main nozzle body (2).

Abstract: Wearable support structure for at least partly relieving a human body during leaning or bending over, said structure comprising a frame having a chest support for bearing upon a chest of said human body, pivoting arrangements for pivoting the support structure in correspondence with the leaning or bending or the human body, two elongated stays connected to said chest support, provided to extend substantially alongside opposite sides of said human body and connected to said pivoting arrangements, wherein the stays are resilient stays arranged such that they are in a stretched state corresponding with an upright position of said human body when being unloaded, and arranged to be biased back to said stretched state when being bent into a bent state corresponding with a leaning or bending position of said human body, a lumbar support, connected to said pivoting arrangements, and arranged for bearing upon a lumbar area of said human body, and a thigh support, connected to said pivoting arrangements, and arranged f

Abstract: A nozzle for a three-dimensional printing apparatus, comprising a main nozzle body (2) having an inlet end (4), an outlet end (6) and a central conduit (8) arranged there between, wherein the main nozzle body (2) is made of an electrically non-conductive body material. The main nozzle body (2) is provided with an electrically conductive first layer (10) and/or an electrically non-conductive second layer (12) arranged around the main nozzle body (2).