A venting unit for venting an electronics housing includes a base body configured to be connected to a pressure compensation opening of the electronics housing, the base body having an opening, a fluid-permeable cover disposed on the base body, a valve closure plate covering the opening of the base body and being covered by the cover, and a spring member interposed between the valve closure plate and the cover and engaging the valve closure plate and the cover. The cover is configured to be fixed in an actual mounting position among at least two mounting positions providing different heights of the cover above the valve closure plate, so that the actual mounting position of the cover sets a pre-compression of the spring member, the pre-compression corresponding to an opening pressure of the valve closure plate.

A housing part for an explosion-protected housing (10) with flameproof encapsulation. The housing part comprises a porous body (20) in a passage (15) of the housing part. The passage (15) is closed in a flameproof manner by means of the porous body (20). The porous body (20) comprises an inner side (21) assigned to the interior of the housing (10) and an outer side (22) assigned to the surrounding area (12) comprising the explosive atmosphere. A gas volume flow can pass through the porous body (20), entering the porous body (20) on the inner side (21) and escape on the outer side (22) or vice versa. To prevent the penetration of water or of other aqueous liquids into the interior of the housing (10), the porous body (20) comprises a hydrophobic surface (B) in at least one area (31).

An element for ventilation of a housing containing an electrical, electronic, mechanical, electromechanical or similar device such as a motor vehicle headlamp, including a rigid body having an outer cylindrical wall, closed off at a first extremity by a closing part, the cylindrical wall open at a second extremity attached to the housing, the body including an inner member of an at least partly yielding material having a first extremity close to the closing part of the rigid body and bearing a filtering membrane, and a second open extremity facing the housing; between the filtering membrane or the first extremity of the inner member and the closing part of the rigid body there is a distance of between 1 and 4 mm, securer for securing insertion of the inner member within the rigid body provided to allow the distance to be automatically maintained at time of insertion.

A ventilation structure (10A) includes a housing (50) having an opening portion (50a) and a ventilation member (1A) formed of a porous resin and attached to the housing (50) so as to cover the opening portion (50a). In the ventilation structure (10A), the ventilation member (1A) is fitted to a side surface (50d) of a projecting portion (50b) provided on an outer surface of a wall portion (50g) of the housing (50), with at least one of the projecting portion (50b) and the ventilation member (1A) being elastically deformed.

A ventilation structure (100) includes a metal housing (10) and a ventilation member (30). The metal housing (10) is a housing that requires ventilation, and has a ventilation hole (12) and a hole-surrounding portion (14). The ventilation hole (12) is covered by the ventilation member (30). The hole-surrounding portion (14) defining the periphery of the ventilation hole (12) has been subjected to an alumite treatment, a Veluscudo treatment, a chromium-plating-on-aluminum treatment, or an oil-repellent treatment.

A pressure equalization element for a housing, such as a lithium-ion accumulator, includes a membrane and at least two parallel non-return valves. The membrane is connected in series to the non-return valves, which are positioned opposite each other. The non-return valves are formed by two valve plates and a valve membrane. The plates define at least one outlet chamber and at least one inlet chamber which each have a respective entry opening and exit opening. The membrane is positioned between the plates and includes at least two valve dampers, the entry openings of the inlet and outlet chambers sealed by a respective damper. Pressure equalization elements of this type can thus be cost-effectively and logically implemented via few components, while avoiding loose components. Such elements can be included in, for example, a housing, battery cell module, or motor vehicle.

A housing kit (90) includes a housing body (20) and a ventilation member (10). The housing body (20) has a vent hole (21). The ventilation member (10) has a leg portion (26). The leg portion (26) is a portion adapted to be inserted into the vent hole (21). The housing body (20) has an inner peripheral surface (23) that defines the vent hole (21). The inner peripheral surface (23) includes a first rounded segment (23.sub.R1), a first straight segment (23.sub.S1),ounded segment (23.sub.R2), and a second straight segment (23.sub.S2) that are formed in order from an exterior space (24) side to an interior space (22) side of the housing body (20). The first rounded segment (23.sub.R1) and the second rounded segment (23.sub.R2) each form a curve convex toward a central axis (O) of the vent hole (21) in a cross section of the housing body (20) including the central axis (O). The first straight segment (23.sub.S1) and the second straight segment (23.sub.S2) each form a straight line in this cross section.

A ventilation housing of the present disclosure includes: a housing; and a ventilation assembly. The housing includes a tubular projection extending to project from an outer surface and internally having a first space communicating the inside and the outside of the housing. The ventilation assembly includes: an internal member being a tubular body having an opening at a first end portion and an opening at a second end portion; a gas-permeable membrane covering the opening at the first end portion of the internal member; and an external member being a tubular body having a bottom, the external member being joined to the internal member with the internal member inserted in the interior of the external member from the first end portion side. The ventilation assembly is fixed to the projection with the projection inserted in the opening at the second end portion of the internal member to make an inner peripheral surface of the internal member and an outer peripheral surface of the projection abut each other. The ventilation assembly has a second space serving as a ventilation path connecting the gas-permeable membrane and the outside of the ventilation assembly in the inside of the internal member, the inside of the external member, and/or an interspace between the two members. A ratio between an area S1 of a cross-section of the first space and a smallest total area S2.sub.min determined by comparison of values of different total areas determined at different distances from the gas-permeable membrane, the total areas each being determined for a cross-section(s) of the second space, is 1.0 or more. A ratio between the area S1 and a total area S2.sub.out of a plane consisting of a cross-section(s) of the second space taken at a position(s) where the second space is the narrowest is more than 1.0. This ventilation housing exhibits excellent performance in terms of moisture permeation between the inside and the outside of the housing.

Fasteners and fastener systems that can act as air vents for enclosures are described. The fasteners can be configured to secure a component to a wall of an enclosure, while at the same time providing a passageway for air to pass between an internal cavity of the enclosure and an outer environment. The venting feature of the fastener can serve to equalize pressures between the internal cavity and outer environment so as to prevent pressure build up or condensation within the internal cavity. The dual functionality of the fasteners is suitable for use in portable electronic devices where compactness and space saving measures can be of importance.

A pressure compensation element for casings includes a connecting body in the form of a hollow body, a membrane seat having a contact surface for a membrane and an impact protection device. The membrane seat is arranged on the connecting body wherein the impact protection device is coupled to the connecting body. The membrane is arranged on the contact surface between the impact protection means and the membrane seat. The connecting body has a first opening arranged on a first free end, and a second opening leading to the contact surface of the membrane seat, wherein a spring element is arranged inside the second opening abutting the contact surface. The spring element provides a support contour for the membrane.