Powered pulse shingle and nail remover/demolition

Abstract

Powered Pulse Shingle and Nail Remover/Demolition Tool, the “Demolition Demon”, is a tool composed of a frame, which has a T/D-handle, with an enclosed trigger. The handle is integral to the frame that provides alignment of components and structural strength to the tool as a whole. The “Demolition Demon” is essentially a combination shovel, crowbar, wrecking bar that has an air cylinder driven hammer device mounted on the frame to provide impact power to drive the shovel blade, flat bar, nail claw under the fastener, or cut, scrape, or separate members. This tool has multiple tools that can be attached to the end of the tool driver by using a common interface. The hammer effect is derived from accelerating a large mass over a distance to develop momentum and then impact the tool driver to which the tool is attached. Impact is controlled by a trigger mechanism that operates a multi-port valve. The impact can be adjusted by regulating the pressure at the compressor or by inserting an adjustable pressure restriction valve ahead of the air inlet on the tool.

1 . I claim my invention, the “Demolition Demon”, to be a powered combination tool for removing nails/fasteners and performing demolition work, that uses pulses of energy that are sufficiently powerful as to drive the blade of the tool under the heads of a nails holding shingles to a roof on the first or second pulse. 
 I claim the potential energy generated by air pressure, electrical power (AC or DC), or gas combustion must create a large enough force to generate impact of sufficient strength to accomplish the task at hand, demolition work or nail and shingle removal.    I claim the application of impact energy, like a hammer blow, is required to be effective in demolition or roof removal work, not vibratory or reciprocating motion.    
   
   
       2 . I claim that by using an air cylinder that has a high mass piston and shaft (with a stroke greater than 2 inches operated with high pressure air (greater than 90 psi) can provide the necessary high impact force to drive the tools blade to the desired position to perform shingle and nail removal or demolition work. 
 I claim, for large tools, the addition of an accumulator may be required to keep the pressure sufficiently high throughout the stroke of the air cylinder.    I claim that the use of commercially available multi port valves and pilot valves in conjunction with a high mass piston and shaft air cylinder can be effectively and efficiently controlled to perform the desired function, that of delivering a strong hammer like blow to the tool driver.