Abstract: Disclosed herein is a sound absorbing structure which includes at least one sound-permeable nanofiber layer and at least one sound absorbing layer; in which, the sound-permeable nanofiber layer is placed alongside of the sound absorbing layer.

Abstract: Disclosed herein is a sound absorbing structure which includes at least one sound-permeable nanofiber layer and at least one sound absorbing layer; in which, the sound-permeable nanofiber layer is placed alongside of the sound absorbing layer.

Abstract: A snow melting assembly includes a cart that may contain snow thereby facilitating the snow to be melted. A lid is hingedly coupled to the cart such that the lid is positionable between an open position and a closed position. An agitation unit is coupled to the cart such that the agitation unit may stir the snow within the cart. A heating unit is coupled to the cart such that the heating unit may melt the snow within the cart. A plurality of wheels is coupled to the cart such that the cart may be rolled along a support surface. A handle is movably coupled to the cart such that the handle may be manipulated.

Abstract: A snow melting assembly includes a cart that may contain snow thereby facilitating the snow to be melted. A lid is hingedly coupled to the cart such that the lid is positionable between an open position and a closed position. An agitation unit is coupled to the cart such that the agitation unit may stir the snow within the cart. A heating unit is coupled to the cart such that the heating unit may melt the snow within the cart. A plurality of wheels is coupled to the cart such that the cart may be rolled along a support surface. A handle is movably coupled to the cart such that the handle may be manipulated.

Abstract: The present invention generally provides a gas operated pump having a removable and insertable valve. In one aspect, the invention includes a pump housing having a fluid path for pressurized gas and a second fluid path for exhaust gas. The fluid paths are completed when the valve is inserted into a longitudinal bore formed in the housing.

Abstract: The present invention generally provides a gas operated pump having a removable and insertable valve. In one aspect, the invention includes a pump housing having a fluid path for pressurized gas and a second fluid path for exhaust gas. The fluid paths are completed when the valve is inserted into a longitudinal bore formed in the housing.

Abstract: An apparatus for supplying and venting gas to a downhole accumulation chamber that includes a supply valve having an open supply position to supply gas to the chamber and a closed supply position, a vent valve having an open vent position to vent gas from the chamber and a closed vent position, and an actuator communicating with a source of pressurized fluid at the surface for actuating the supply and vent valves. The actuator moves the supply valve to the open position and the vent valve to the closed position, and alternately moves the vent valve to the open vent position and the supply valve to the closed supply position. The actuator may include a single hydraulically actuated reciprocating member or a pair of hydraulically actuated reciprocating members.