66results about How to "Entry is limited" patented technology

A surface-mountable MEMS microphone comprising a MEMS microphone die and an application-specific integrated circuit (ASIC) mounted inside a surface-mountable package housing, and fully enclosed therein. The surface-mountable package is a single, self-contained housing that provides an electrical interface to external circuitry for the enclosed MEMS microphone die and the ASIC, and provides electrical, physical, and environmental protection for the MEMS microphone die and the ASIC. The surface-mountable package allows external acoustic energy to enter the package interior via one or more acoustic ports and impinge on the diaphragm of the MEMS microphone die. The cover of the surface-mountable package comprises an acoustic port with ingress protection to limit dust and particle intrusion. The ingress protection can be a formed member that is part of the cover of the surface-mountable package having various shapes, an internal shield, or a combination of both a formed member and internal shield.

A vent assembly for attachment to a fluid discharge conduit of the type connected to a clothes dryer, room exhaust fan, or the like is adapted to reduce or prevent the trapping of dirt or lint as well as flapping or vibration of the door in windy conditions. A mount having an opening is received on the conduit and a door is pivotally received by the mount. The door is operable for displacement with respect to the opening between an open position and a closed position when engaged by a fluid, such as air from a clothes dryer, flowing through the discharge conduit. A hood is pivotally mounted over the door and mount opening, and is operable for displacement with respect to the mount when engaged by the door and / or by fluid flowing through the discharge conduit.

A cannula assembly having a retention member and a method of manufacture of the cannula assembly is provided. The cannula assembly includes a cannula and a sleeve disposed around the cannula from a proximal end to a distal end. The sleeve can be pre-formed by a stretch blow molding process then advanced over the cannula. The sleeve includes an inflatable balloon and an annular ring distal the inflatable balloon. The cannula includes an annular recess. The annular ring is sized to have an interference fit with the annular recess.

In a vehicle ac generator, a rear cover, which is provided to cover a rectifying device, has a cover body and a protecting wall portion. The cover body forms a plurality of air intake openings through which cooling air created by rotation of a rotor is sucked in the generator. The protecting wall portion is integrally formed with the cover body. The protecting wall portion extends from an axial end surface of the cover body in an axially outward direction of a rotation shaft of the rotor, at a position higher than the air intake openings when the vehicle ac generator is mounted on a vehicle. Therefore, it is less likely that foreign materials such as water and oil will enter the inside of the rear cover from the air intake openings.

A vent assembly for attachment to a fluid discharge conduit of the type connected to a clothes dryer, room exhaust fan, or the like includes a mount having an opening received on the conduit and a door pivotally received by the mount. The door includes a first surface portion for covering at least a portion of the opening and a second surface portion joined to the first surface portion and extending from the door and protruding into the opening. The door is operable for displacement with respect to the opening between an open position and a closed position when engaged by a fluid flowing through the discharge conduit. The door is in the open position only after the door pivots sufficiently to move the first and second surface portions fully out of the opening, whereby birds, animals, and the like are restricted from entering the conduit.

The invention provides a positively pressurized housing ventilated by establishing and / or maintaining a pressure differential between at least two chambers in the housing. The invention also provides a method for ventilating a substantially closed housing that involves establishing and / or maintaining a pressure differential between at least two chambers in the housing.

The invention is a hydrogen passivation shut down system for a fuel cell power plant (10, 200). During shut down of the plant (10, 200), hydrogen fuel is permitted to transfer between an anode flow path (24, 24′) and a cathode flow path (38, 38′). A controlled-oxidant flow device (209) near an oxygen source (58′) permits a minimal amount of atmospheric oxygen to enter the power plant (200) during shut down to equalize pressure between ambient atmosphere and the flow paths (24′, 28′) and to keep limited atmospheric oxygen entering the power plant (200) through the device (209) as far as possible from fuel cell flow fields (28′, 42′). A non-leaking hydrogen inlet valve (202), a non-leaking cathode exhaust valve (208), and a combined oxidant and fuel exhaust line (206) also minimize penetration of oxygen into the shut down power plant (200).

An in-ground sand receptacle contains sand used to repair divots in a golf course. The receptacle includes a plurality of walls defining an enclosure adapted for residing below a ground surface of the golf course. The enclosure has an open top for receiving sand therein. A lid removably covers the open top of the enclosure. Indicia is applied to the lid for indicating a distance between the receptacle and a predetermined point on the golf course.

An outboard motor has a cowling enclosing the engine. A sidewall of the cowling has an air introduction opening for introducing ambient air to an air introduction chamber within the cowling. A protruded suction opening of an air duct in the air introduction opening has a flange extending generally toward the air introduction opening so as to deflect water from the opening.