Handheld pressurized hopper gun and method
Patent 5979797 Issued on November 9, 1999. Estimated Expiration Date: 
August 14, 2018. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
August 14, 2018. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1559666 1933543 2886252 2901182 3001829 3007744 3236459 3442454 3604758 Powder feed device for flame spray guns InventorApplicationNo. 134629 filed on 08/14/1998US Classes:239/346, Holder coupled to gas supply source239/365, Branched flow from main stream to holder239/366, Air and liquid flow paths combine upstream of spray outlet239/369, Air and liquid flow paths combine upstream of spray outlet239/373, Means to pressurize contents of holder239/376, Gravity discharge hand carried239/377, Upending or tilting for discharge239/379Gravity flow from holder (e.g., hopper type)ExaminersPrimary: Kashnikow, AndresAssistant: Evans, Robin O. Attorney, Agent or FirmForeign Patent References
International ClassesB05B 007/30B05B 009/00 AbstractA handheld pressurized hopper gun for use in patching acoustic ceilings and repairing cracks and damage in walls and ceilings by applying a texturized sealing compound thereto is disclosed. The pressurized hopper gun is typically employed where plaster walls and ceilings are being refurbished due to damage thereto. The handheld pressurized hopper gun includes a spray gun, a pressurized sealed hopper mounted over the spray gun and containing a sealing compound, and a pressurized air input. The pressurized air input provides low pressure air from an air input housing to an air regulator and the spray gun and to a cock valve and the pressurized sealed hopper. The spray gun has a handle having a first air passage formed therethrough, a movable hollow plunger shaft having a second air passage formed therethrough, a nozzle for seating an end of the hollow plunger shaft and an orifice formed through the nozzle. The orifice and the second air passage are aligned and communicate with the first air passage so that low pressure air is constantly passing through the spray gun. A trigger is included for unseating the hollow plunger shaft from the nozzle so that the sealing compound is dispensed out the orifice under air pressure. A flexible air line connecting the air input housing to the pressurized sealed hopper includes a pressure gauge combined with the cock valve for controlling the low pressure air supplied to the sealed hopper.Other References
Field of SearchTo be mixed, dissolved or entrained in a flowing liquid stream prior to dischargeGas addition upstream of spray nozzle outlet Unitary outlet means and holder Fluid pressure discharge means Discharge from upended or tilted holder (e.g., by gravity feed to reducer) Holder coupled to gas supply source Including valved eduction tube or closure means Parallel pressure flows to holder and pressure reducer Branched flow from main stream to holder Air and liquid flow paths combine upstream of spray outlet Air and liquid flow paths combine upstream of spray outlet Means to pressurize contents of holder Including handle or handgrip for supply container and attached outlet Gravity discharge hand carried Upending or tilting for discharge Gravity flow from holder (e.g., hopper type) And additional downstream liquid nozzle | |
