Abstract: A gutter guard device is described comprising a bridge member composed of a decking material having a plurality of orifices, and having a roof side and an opposing gutter lip side, at least one girder spanning a bottom surface of the bridge member from a proximal end of the bridge member's roof side to a proximal end of the bridge member's gutter lip side, a roof attachment member configured to attach to the roof side of the bridge member, and a gutter attachment member configured to attach to the gutter lip side of the bridge member, wherein the roof attachment member, the bridge member and the gutter attachment member are a single piece of material and the device is self-supporting.

Abstract: A gutter guard device is described comprising a bridge member composed of a decking material having a plurality of orifices, and having a roof side and an opposing gutter lip side, at least one truss spanning a top surface of the bridge member from a proximal end of the bridge member's roof side to a proximal end of the bridge member's gutter lip side, a roof attachment member configured to attach to the roof side of the bridge member, and a gutter attachment member configured to attach to the gutter lip side of the bridge member, wherein the roof attachment member, the bridge member and the gutter attachment member are a single piece of material and the device is self-supporting.

Abstract: A gutter guard device is described, comprising, a bridge member composed of a sheet or micro-mesh decking material having a plurality of orifices, and having a roof side and an opposing gutter lip side; at least one girder spanning a bottom surface of the bridge member from a proximal end of the bridge member's roof side to a proximal end of the bridge member's gutter lip side; a roof attachment member attached to an end section of the roof side of the bridge member and configured to attach to a roof; and a gutter attachment member attached to an end section of the gutter lip side of the bridge member and configured to attach to a gutter lip, wherein the device is self-supporting.

Abstract: A gutter guard device is described, comprising: a bridge member composed of a sheet or micro-mesh decking material having a plurality of orifices, and having a roof side and an opposing gutter lip side; at least one girder spanning a bottom surface of the bridge member from a proximal end of the bridge member's roof side to a proximal end of the bridge member's gutter lip side; a roof attachment member attached to an end section of the roof side of the bridge member and configured to attach to a roof; and a gutter attachment member attached to an end section of the gutter lip side of the bridge member and configured to attach to a gutter lip, wherein the device is self-supporting.

Abstract: A gutter guard device is described comprising a bridge member composed of a decking material having a plurality of orifices, and having a roof side and an opposing gutter lip side, at least one girder spanning a bottom surface of the bridge member from a proximal end of the bridge member's roof side to a proximal end of the bridge member's gutter lip side, a roof attachment member configured to attach to the roof side of the bridge member, and a gutter attachment member configured to attach to the gutter lip side of the bridge member, wherein the roof attachment member, the bridge member and the gutter attachment member are a single piece of material and the device is self-supporting.

Abstract: A gutter guard device is described, comprising: a bridge member composed of a sheet or micro-mesh decking material having a plurality of orifices, and having a roof side and an opposing gutter lip side; at least one girder spanning a bottom surface of the bridge member from a proximal end of the bridge member's roof side to a proximal end of the bridge member's gutter lip side; a roof attachment member attached to an end section of the roof side of the bridge member and configured to attach to a roof; and a gutter attachment member attached to an end section of the gutter lip side of the bridge member and configured to attach to a gutter lip, wherein the device is self-supporting.

Abstract: A barrier is provided to preclude debris from passing into a rain gutter. The barrier includes a screen supported upon a channel. The channel includes a tab positionable between a roof and shingles upon the roof, and with a lip opposite the tab resting upon a portion of a gutter opposite the roof. The channel includes a recess between the tab and the lip. The recess includes a floor defining a lower plane of the channel. Ribs extend from the floor up to an upper plane of the channel in which the screen is supported. The ribs have sufficient height to remain in contact with the screen. Water is drawn through the screen and along the ribs down to the floor of the recess. Apertures in the floor allow the water to fall down through the channel and into the gutter, while debris is precluded from passing through the screen.

Abstract: A combined measuring and injecting flow cell has a single housing defining a pair of chambers connected by a small passage. The first or sensing chamber has an inlet valve and at least one monitoring member extending therein. The second or injection chamber has an outlet valve and at least one injector extending therein. Preferably at least one wall of the cell is transparent to allow visually monitoring the conditions within.