Davis Energy Group, Inc.

Other

Brian Eric Lee

Richard Curtis Bourne

Duncan Callaway

Mark J Berman

Lanny Ray Lee

A roof top cooling unit has an evaporative cooling section that includes at least one evaporative module that pre-cools ventilation air and water; a condenser; a water reservoir and pump that captures and re-circulates water within the evaporative modules; a fan that exhausts air from the building and the evaporative modules and systems that refill and drain the water reservoir. The cooling unit also has a refrigerant section that includes a compressor, an expansion device, evaporator and condenser heat exchangers, and connecting refrigerant piping. Supply air components include a blower, an air filter, a cooling and/or heating coil to condition air for supply to the building, and optional dampers that, in designs that supply less than 100% outdoor air to the building, control the mixture of return and ventilation air.

Hydronic rooftop cooling systems

Firearm safety block devices and methods of use increase the pressured needed to pull back on triggers to cause a firearm to discharge the first shot A block member can be mounted on the firearm at different locations such as above, inside the trigger and behind the trigger. The invention can provide different block members having frangible areas that are broken or bent at selected side imposed pressures. Breaking, shearing or bending the block members is required to operate the firing mechanism as needed to cause the firearm to discharge. A spent frangible block member can be removed and replaced. When the firearm safety block is not applicable the block member can be removed.

Passive safety block

A two stage indirect evaporative cooler that moves air from a blower mounted above the unit, vertically downward into dry air passages in an indirect stage and turns the air flow horizontally before leaving the indirect stage. After leaving the dry passages, a major air portion travels into the direct stage and the remainder of the air is induced by a pressure drop in the direct stage to turn 180&#xb0; and returns horizontally through wet passages in the indirect stage and out of the unit as exhaust air.

Two stage indirect evaporative cooling system

An evaporative heat exchanger having parallel plates that define alternating dry and wet passages. A water reservoir is located below the plates and is connected to a water distribution system. Water from the water distribution system flows through the wet passages and wets the surfaces of the plates that form the wet passages. Air flows through the dry passages, mixes with air below the plates, and flows into the wet passages before exiting through the top of the wet passages.

Vertical counterflow evaporative cooler

A solar water heater has a rotationally-molded water box and a glazing subassembly disposed over the water box that enhances solar gain and provides an insulating air space between the outside environment and the water box. When used with a pressurized water system, an internal heat exchanger is integrally molded within the water box. Mounting and connection hardware is included to provide a rapid and secure method of installation.

Growing community of inventors

Monterey, CA, United States of America

Brian Eric Lee