Abstract: A roof structure has a level support frame extending in a support frame plane, is supported by a support structure and has at least two longitudinal beams arranged parallel and at a mutual distance from each other and at least two cross beams arranged parallel to each other and at a mutual distance from each other and surrounds a frame field. Several rafters connect the cross beams with each other and are arranged at a mutual distance from the longitudinal beams in such a way that the frame field is divided into several roof fields. The roof fields are each covered by a level cover plate, wherein each cover plate extends in its own cover plane and the cover planes are arranged at an angle to the support frame plane. The cover plates are each rectangular and have a long longitudinal axis and a short longitudinal axis perpendicular to it.

Abstract: A roof structure has a level support frame extending in a support frame plane, is supported by a support structure and has at least two longitudinal beams arranged parallel and at a mutual distance from each other and at least two cross beams arranged parallel to each other and at a mutual distance from each other and surrounds a frame field. Several rafters connect the cross beams with each other and are arranged at a mutual distance from the longitudinal beams in such a way that the frame field is divided into several roof fields. The roof fields are each covered by a level cover plate, wherein each cover plate extends in its own cover plane and the cover planes are arranged at an angle to the support frame plane. The cover plates are each rectangular and have a long longitudinal axis and a short longitudinal axis perpendicular to it.

Abstract: A membrane valve for fluid media, comprising a valve body, a membrane, a pressure piece, and a drive) for the pressure piece. The membrane is coupled to the pressure piece by a connecting element, having a wall which projects from the membrane in the direction of the pressure piece. A latching hook laterally protrudes from one side and a free space is provided on the other side such that the wall. The latch hook can be deflected in order to connect the latching hook to a corresponding receiving portion on the pressure piece. A stationary pin engages into the free space when the membrane is raised from the valve seat of the valve body and protrudes out of the free space when the membrane is resting on the valve seat.

Abstract: The invention relates to a membrane valve (10), in particular for fluid media, comprising a valve body (20), a membrane (22), a pressure piece (44), and a drive (14) for the pressure piece (44). The membrane (22) is coupled to the pressure piece (44) by means of a connecting element (24), said connecting element (24) having a wall (56) which projects from the membrane (22) in the direction of the pressure piece (44) and on which a laterally protruding latching hook (58) is provided on one side and a free space (50) is provided on the other side such that the wall (56) can be deflected in order to connect the latching hook (58) to a corresponding receiving portion (63) on the pressure piece (44). A stationary pin (74) is provided which engages into the free space (50) when the membrane (22) is raised from the valve seat (32) of the valve body (20) and which protrudes out of the free space (50) when the membrane (22) is resting on the valve seat (32).