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US 6,659,844 B2Granted
Pliant coating stripping
AssigneeGeneral Electric Company
InventorJames Stephen Shaw
Life of this patent
Estimating the term…
Abstract
Abrasive shot is injected into a carrier stream of compressed gas. The shot and gas stream are directed against a pliant coating. The compressed gas expands at the coating for cooling thereof which decreases coating resiliency for enhancing stripping thereof by the impinging abrasive shot.
Claims20
A method of stripping comprising:
- providing a workpiece having a pliant coating thereon;
- injecting abrasive shot into a carrier stream of compressed gas;
- directing said shot and gas stream against said coating;
- and
- expanding said compressed gas in said stream at said coating for cooling said coating to decrease resilience thereof for stripping by said shot.
2 more elements
A method of stripping comprising:
- providing a workpiece having a pliant coating thereon;
- injecting into a carrier stream of compressed carbon dioxide gas abrasive shot including a multitude of pellets having abrasive particles imbedded therein;
- directing said shot and gas stream against said coating;
- and
- expanding said compressed gas in said stream at said coating for cooling said coating to decrease resilience thereof for stripping by said shot.
2 more elements
An apparatus for stripping a pliant coating from a workpiece comprising:
- a hopper containing abrasive shot;
- a canister containing compressed gas, said gas having a different material composition than said shot;
- a nozzle having a shot inlet and a gas inlet, and a common outlet;
- means for supplying abrasive shot from said hopper to said nozzle shot inlet;
- means for supplying compressed gas from said canister to said nozzle gas inlet for discharge with said abrasive shot as a stream from said common nozzle outlet;
- and
- said compressed gas being effective for expanding upon discharge from said nozzle for cooling said coating to decrease resilience thereof for stripping by said shot.
4 more elements
Dependencies are inferred from the claim text.