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 method for storing a file containing personal data comprises obtaining a temporary anonymous identifier (AnonID.m) of a person, which temporary anonymous identifier (AnonID.m) is dependent on a token (FileID.m) of the file; extracting personal data items from the file associated with the person; for each personal data item, generating a locator (Loc.m.n), which allows the personal data item to be reinstated into the file, and an item-specific anonymous identifier (AnonID.m.n) of the person, wherein the item-specific anonymous identifier is generated by applying a predefined one-way function to a combination of the temporary anonymous identifier (AnonID.m) and an identifier (n) of the personal data item; storing each personal data item together with the locator and the item-specific anonymous identifier in a first memory; and storing an anonymized version of the file without the personal data items in a second memory.

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 method for storing a file containing personal data comprises obtaining a temporary anonymous identifier (AnonID.m) of a person, which temporary anonymous identifier (AnonID.m) is dependent on a token (FileID.m) of the file; extracting personal data items from the file associated with the person; for each personal data item, generating a locator (Loc.m.n), which allows the personal data item to be reinstated into the file, and an item-specific anonymous identifier (AnonID.m.n) of the person, wherein the item-specific anonymous identifier is generated by applying a predefined one-way function to a combination of the temporary anonymous identifier (AnonID.m) and an identifier (n) of the personal data item; storing each personal data item together with the locator and the item-specific anonymous identifier in a first memory; and storing an anonymized version of the file without the personal data items in a second memory.

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.