Abstract: A backflow prevention device includes a main pipe body extending along a first center longitudinal axis, at least one check valve disposed within the main pipe body, an inlet pipe connected to an inlet side of the main pipe body, and an outlet pipe connected to an outlet side of the main pipe body. The inlet pipe and the outlet pipe extend along a second center longitudinal axis. The first center longitudinal axis is offset with respect to the second center longitudinal axis in a direction perpendicular to the first and second center longitudinal axes. A center of the valve seat of the at least one check valve is offset with respect to the second center longitudinal axis in the direction perpendicular to the first and second longitudinal axes.

Abstract: A spring stop arrangement for a check valve may include: a check seat defining a flow path; a clapper assembly connected to the check seat and configured to obstruct the flow path, the clapper assembly including: a clapper; and a seal retainer detachably mounted to the clapper; a cam arm connected to the check seat, the cam arm including a stopper; and a torsion spring operatively connected to the cam arm so as to apply a biasing force to the cam arm against the direction of fluid flow. When the seal retainer is dismounted from the clapper, the stopper may be configured to contact the check seat so as to prevent rotation of the cam arm.

Abstract: A check valve may include: a check seat defining a flow path; a clapper assembly hingedly connected to the check seat and configured to obstruct the flow path, including: a clapper and a seal retainer detachably mounted to the clapper; a first extension extending from the clapper assembly in an upstream direction and having a roller; a cam arm rotatable relative to the clapper assembly and configured to engage with the roller; and a torsion spring operatively connected to the cam arm so as to apply a biasing force to the cam arm in the upstream direction. The biasing force may be imparted to the clapper assembly via the cam arm and roller, so that the clapper assembly obstructs the flow path.

Abstract: A backflow prevention device includes a main pipe body extending along a first center longitudinal axis, at least one check valve disposed within the main pipe body, an inlet pipe connected to an inlet side of the main pipe body, and an outlet pipe connected to an outlet side of the main pipe body. The inlet pipe and the outlet pipe extend along a second center longitudinal axis. The first center longitudinal axis is offset with respect to the second center longitudinal axis in a direction perpendicular to the first and second center longitudinal axes. A center of the valve seat of the at least one check valve is offset with respect to the second center longitudinal axis in the direction perpendicular to the first and second longitudinal axes.

Abstract: Exemplary embodiments are provided of antennas and antenna systems including the same. In an exemplary embodiment, an antenna generally includes an upper radiating patch element, a ground plane spaced apart from the upper radiating patch element, and a feed point positioned adjacent the ground plane. A first feeding element electrically couples (e.g., via proximity coupling or direct galvanic coupling) the upper radiating patch element to the feed point. A second feeding element electrically couples (e.g., via proximity coupling or direct galvanic coupling) the upper radiating patch element to the feed point. A shorting element electrically couples (e.g., via proximity coupling or direct galvanic coupling) the upper radiating patch element to the ground plane. In other exemplary embodiments, the antenna systems include one or more ground planes and one or more antennas.

Abstract: An exemplary embodiment of an multiband antenna assembly includes a printed circuit board having a plurality of elements thereon. The plurality of elements may include a radiating element, a matching element, a feed element configured to be operable as a feeding point for the multiband antenna assembly, and a shorting element configured to be operable for electrically shorting the radiating element to ground. The antenna assembly may be operable within at least a first frequency range and a second frequency range different than the first frequency range without requiring any matching lump components coupled to the printed circuit board.

Abstract: Exemplary embodiments are provided of antennas and antenna systems including the same. In an exemplary embodiment, an antenna generally includes an upper radiating patch element, a ground plane spaced apart from the upper radiating patch element, and a feed point positioned adjacent the ground plane. A first feeding element electrically couples (e.g., via proximity coupling or direct galvanic coupling) the upper radiating patch element to the feed point. A second feeding element electrically couples (e.g., via proximity coupling or direct galvanic coupling) the upper radiating patch element to the feed point. A shorting element electrically couples (e.g., via proximity coupling or direct galvanic coupling) the upper radiating patch element to the ground plane. In other exemplary embodiments, the antenna systems include one or more ground planes and one or more antennas.

Abstract: According to various aspects, exemplary embodiments are disclosed of ground independent multi-band antenna assemblies. In an exemplary embodiment, a ground independent multi-band antenna assembly is operable within at least a first frequency range and a second frequency range different than the first frequency range. The antenna assembly generally includes an annular ground element, a feed element, a patch element, and a high band element. The feed element includes a feeding point and a shorting point electrically connected to the annular ground element. The patch element is electrically shorted to the annular ground element by the feed element. The high band element is electrically connected to the feed element.

Abstract: According to various aspects, exemplary embodiments are disclosed of ground independent multi-band antenna assemblies. In an exemplary embodiment, a ground independent multi-band antenna assembly is operable within at least a first frequency range and a second frequency range different than the first frequency range. The antenna assembly generally includes an annular ground element, a feed element, a patch element, and a high band element. The feed element includes a feeding point and a shorting point electrically connected to the annular ground element. The patch element is electrically shorted to the annular ground element by the feed element. The high band element is electrically connected to the feed element.

Abstract: The present invention generally relates to lockboxes. More particularly, the invention relates to a mechanical pushbutton combination lockbox which is designed to self-lock such that an additional input or locking action is not required to lock the lockbox when closed.

Abstract: The present invention generally relates to lockboxes. More particularly, the invention relates to a lockbox which is designed to self-lock such that an additional input or locking action is not required to lock the lockbox when closed.

Abstract: Exemplary embodiments are provided of multiple-antenna systems with enhanced and/or good isolation and directivity. In one exemplary embodiment, a system generally includes a ground plane and two or more antenna elements coupled to the ground plane. The system also includes two or more low frequency isolators/reflectors and two or more high frequency isolators/reflectors coupled to the ground plane.

Abstract: An exemplary embodiment of an multiband antenna assembly includes a printed circuit board having a plurality of elements thereon. The plurality of elements may include a radiating element, a matching element, a feed element configured to be operable as a feeding point for the multiband antenna assembly, and a shorting element configured to be operable for electrically shorting the radiating element to ground. The antenna assembly may be operable within at least a first frequency range and a second frequency range different than the first frequency range without requiring any matching lump components coupled to the printed circuit board.

Abstract: In one embodiment, a light-emitting device having a body, a reflector, a light source die, and a spectral converter is disclosed. The spectral converter may be formed adjacent to, but distanced away from, the light source die. The spectral converter may be configured to spectrally adjust a portion of the light output having a predetermined spectral content. In another embodiment, a system for illumination having a plurality of lighting assemblies is disclosed. Each of the lighting assemblies comprises a spectral converter configured to spectrally adjust a portion of the light output so that the plurality of lighting assemblies are configured to emit substantially similar spectral output. In yet another embodiment, a lighting apparatus having the spectral converter is disclosed.

Abstract: In one embodiment, a light-emitting device having a substrate, a casing, a plurality of light source dies, a plurality of spectral converters and a plurality of optical structures is disclosed. The spectral converters may be configured to spectrally adjust a portion of the light output of the light source die into a first and second converted spectral output that is substantially different from one another. In another embodiment, a system for illumination having a plurality of lighting assemblies has been disclosed. Each of the lighting assemblies comprises a light source die and a spectral converter. The spectral converter is configured to spectrally adjust the light output of the light source die so that the plurality of lighting assemblies are configured to emit substantially different spectral output. In yet another embodiment, a lighting apparatus having a primary spectral converter and a secondary spectral converter is disclosed.

Abstract: In one embodiment, a light-emitting device having a substrate, a casing, a plurality of light source dies, a plurality of spectral converters and a plurality of optical structures is disclosed. The spectral converters may be configured to spectrally adjust a portion of the light output of the light source die into a first and second converted spectral output that is substantially different from one another. In another embodiment, a system for illumination having a plurality of lighting assemblies has been disclosed. Each of the lighting assemblies comprises a light source die and a spectral converter. The spectral converter is configured to spectrally adjust the light output of the light source die so that the plurality of lighting assemblies are configured to emit substantially different spectral output. In yet another embodiment, a lighting apparatus having a primary spectral converter and a secondary spectral converter is disclosed.

Abstract: An illumination device, system, and method are disclosed. The illumination device includes a heat sink having a depression or channel established therein. One or more light sources can be mounted in the depression or channel and when light is emitted by the one or more light sources, the light can be directed or shaped by the depression or channel.