Outdoor power equipment includes a chassis, a blower housing, a discharge housing, and a deflector assembly. The blower housing is supported by the chassis. The discharge housing is coupled to the blower housing and is defined by a first discharge chute and a second discharge chute that extend in opposite directions. An impeller is received within the blower housing and is configured to rotate within the blower housing to direct air from the blower housing toward the discharge housing. The deflector assembly is supported by the chassis and includes an actuator and a deflector. The deflector is movable within the discharge housing in response to movement by the actuator to selectively direct flow from the blower housing through the first and second discharge chutes.

A shroud assembly fixed to an abrasive blasting nozzle provides acoustic dampening during operation of the blasting system to reduce damage to the hearing of the user. The shroud assembly additionally provides features that improve safety and reduce fatigue during use. A first embodiment includes an end closure made up of flat acoustic panels and an alternate embodiment includes an end opening having peripheral chevron shaped acoustic panel edges. The shroud assembly includes a mechanism for attachment of the shroud to the abrasive blasting nozzle, a cylindrical blast column positioned forward from and coaxial with the blast nozzle, a cylindrical cone shell with at least one layer of acoustic dampening material surrounding and coaxial with the cylindrical blast column, a dead man switch handle, a second extended handle, a peripheral air curtain generator at the forward opening, and nested layers of one or more types of acoustic material(s).

A device for delivering a predetermined volume a substance within a body cavity. The device includes: at least one predefined volume sized and shaped to contain a predetermined volume the substance; a delivery end in fluid communication with a container; and at least one valve mechanically connected to the container and configurable between an active configuration in which the valve enables delivery of a volume of the substance and an inactive configuration, in which the valve prevents delivery.

A blower includes a chassis, a blower housing coupled to the chassis, a discharge housing including a first discharge chute having a first chute exit and a second discharge chute having a second chute exit, an impeller received within the blower housing and configured direct air from the blower housing to the discharge housing, and a deflector assembly. The deflector assembly includes an actuator, a deflector movable within the discharge housing, wherein movement of the actuator in a first direction rotates the deflector a first position to direct the air flow through the first discharge chute, and wherein movement of the actuator in a second direction rotates the deflector to a second position to direct the air flow through the second discharge chute, and a damper configured to oppose rotation of the deflector to the first position and rotation of the deflector to the second position.

A clampless synthetic jet actuator includes a cavity layer having an internal cavity for reception of a fluid volume and an orifice providing a fluid communication between the cavity and an external atmosphere; and an oscillatory membrane having a piezoelectric material adapted to deflect the oscillatory membrane in response to an electrical signal. The cavity has an opening in at least one planar surface of the cavity layer, and the cavity layer and the oscillatory membrane are joined by a high strength, low shear modulus adhesive material with the oscillatory membrane positioned adjacent to the planar surface having the cavity opening and adapted as an enclosing surface to said cavity opening. The oscillatory membrane is adapted to compress and expand a volume within the cavity, based on a deflection generated by the piezoelectric material, for generating a fluid flow between the cavity and the external atmosphere through the orifice.

By making it to provide an injection head having silencing function for gas-type fire extinguisher and method for storing and assembling thereof capable of eliminating the problems of limitations of place of storage and the cost increase, by making it easy to storage the injection head as stock, the injection head is comprising an injection head main body forming a connecting part for connecting a pipe, an orifice plate forming orifice disposed in the injection head main body for passing the fire extinguishing gas, and a silencing member of block shapes formed on porous material capable of passing the fire extinguishing gas disposed at the outlet side of the orifice plate for releasing the fire extinguishing gas, wherein the orifice plate is disposed detachably in the injection head main body through an opening in the side of a connecting part connected to a piping of the injection head main body.