Abstract: A gear-change selector module has a pipeline module including a plurality of pipes for providing a working fluid, and a gear-change selector housing having a plurality of channels which are each assigned to one of the pipes. The pipes are coupled to the channels via a respective plug-in connection. Each plug-in connection has a seal. Viewed in the plug-in direction, the seals are arranged at different levels.

Abstract: A gear-change selector module for a gearshift of a motor vehicle has a movable element and a shift fork having a carrier arm which engages in a recess of the movable element. The recess has two actuating faces which cooperate with carrier faces of the carrier arm. Viewed in a section running through the centre axis of the movable element and the centre axis of the recess, the actuating faces are each convex in a first portion extending from the centre axis in the direction of the outside of the movable element. Furthermore, viewed in a section running through the centre axis of the movable element and the centre axis of the recess, the carrier faces each extend in a first portion from radially outside the movable element up to the centre axis of the movable element, and in a second portion from the centre axis in the direction of the free end of the carrier arm. The carrier faces are convex in the second portion.

Abstract: A piston for a gear-change selector module of a gearshift has a piston body, at least one sealing element, and a cap which is attached to the piston body by means of a clip connection. Furthermore, the sealing element is here attached to the piston body by means of the cap. Also a gear-change selector module with a piston, and a method for mounting a piston, are provided.

Abstract: A gear-change selector module for a gearshift of a motor vehicle has a movable element and a shift fork having a carrier arm which engages in a recess of the movable element. The recess has two actuating faces which cooperate with carrier faces of the carrier arm. Viewed in a section running through the centre axis of the movable element and the centre axis of the recess, the actuating faces are each convex in a first portion extending from the centre axis in the direction of the outside of the movable element. Furthermore, viewed in a section running through the centre axis of the movable element and the centre axis of the recess, the carrier faces each extend in a first portion from radially outside the movable element up to the centre axis of the movable element, and in a second portion from the centre axis in the direction of the free end of the carrier arm. The carrier faces are convex in the second portion.

Abstract: A gear-change selector module has a pipeline module including a plurality of pipes for providing a working fluid, and a gear-change selector housing having a plurality of channels which are each assigned to one of the pipes. The pipes are coupled to the channels via a respective plug-in connection. Each plug-in connection has a seal. Viewed in the plug-in direction, the seals are arranged at different levels.

Abstract: A piston for a gear-change selector module of a gearshift has a piston body, at least one sealing element, and a cap which is attached to the piston body by means of a clip connection. Furthermore, the sealing element is here attached to the piston body by means of the cap. Also a gear-change selector module with a piston, and a method for mounting a piston, are provided.

Abstract: A piston, in particular for a gear-change selector, including a piston body with a piston skirt and with a piston end face which can be pressurised with a working fluid. The piston includes a first sealing portion and a second sealing portion. The piston body and the first sealing portion have mutually complementary geometries so that they form a first vent channel. The first vent channel is arranged in a hydraulic series circuit with the second sealing portion. The second sealing portion prevents venting up to a first pressure and allows this above the first pressure. The invention furthermore concerns a gear-change selector and a gearshift for a vehicle.

Abstract: A piston, in particular for a gear-change selector, including a piston body with a piston skirt and with a piston end face which can be pressurised with a working fluid. The piston includes a first sealing portion and a second sealing portion. The piston body and the first sealing portion have mutually complementary geometries so that they form a first vent channel. The first vent channel is arranged in a hydraulic series circuit with the second sealing portion. The second sealing portion prevents venting up to a first pressure and allows this above the first pressure. The invention furthermore concerns a gear-change selector and a gearshift for a vehicle.

Abstract: The invention relates to a housing connecting device for connecting two housing sections or housing modules of a ventilation or air-conditioning system to each other, with at least in each case two first connecting elements (1) which are fastened to the operating and rear side of a first housing section or of a first housing module, with in each case at least one pawl (3), with at least in each case two second connecting elements (2) which are fastened to the operating and rear side of an adjacent second housing section or of an adjacent second housing module and each have one latching tooth (Z1) or two latching teeth (Z1, Z2) for preliminary latching and final latching of the pawl, wherein the connecting elements are attached either on the outer side or inner side of the housing sections or housing modules.

Abstract: The invention relates to an air-air heat exchanger as a regenerator, having at least one positionally fixed or movable storage mass through which alternately outside air and exhaust air flows in order to heat or cool the supply air of air-conditioned buildings and thereby save energy during the heating or cooling of interior spaces, wherein the storage mass has plastic, in particular propylene or is composed of plastic, in particular propylene.

Abstract: A non porous wax guard for an in-the-canal hearing aid is in the form of a membrane or diaphragm which completely covers the mouth of the round or other shape outlet of the hearing aid. The membrane is made of plastic or metalized plastic, or stainless steel, having a diameter of between 0.20 inches and 3/8 inch, and a thickness of between 0.0005 inches and 0.001 inches. The membrane is affixed to the mouth of the sound outlet by a number of methods. It may be attached to a thin ring of plastic material, and attached with a spring clip to a recess in the sound outlet. It may simply be bonded, by adhesive or heat bonding, to the recess. It may be affixed to a cylindrical mount, and press-fit into the port. Or, as an alternative, the cylindrical mount may be threaded, and mated with an internal thread cut into the sound outlet.