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US 5,143,296 AGranted
Pneumatic spray gun
AssigneePMC, Inc.
InventorsA. G. Saurwein, Ronald L. Rivers
Life of this patent
Estimating the term…
Abstract
A pneumatic spray gun (10) having a mixing assembly (14) including a resin valve (18) and a catalyst valve (20) formed by valve passages (44,46) formed in a valve rotor (36). A pneumatic trigger assembly (24) and slide assembly (28) control rotation of the valve rotor to open the resin valve momentarily before the catalyst valve. A distribution plate (174) distributes the catalyst within the resin before the mixture flows into a mixer (22).
Claims37
A spray gun for mixing a first fluid stream with a second fluid stream and discharging a mixed fluid stream comprising:
- a hand-held housing;
- a first valve disposed within the housing for controlling the flow of the first fluid stream through the housing, including a first valve passage having an inlet port and an outlet port that are positionable for fluid communication with a first fluid supply passage in the housing and a first fluid discharge passage in the housing, respectively, to open the first valve;
- a second valve disposed within the housing for controlling the flow of the second fluid stream through the housing, including a second valve passage having an inlet port and an outlet port that are positionable for fluid communication with a second fluid supply passage in the housing and a second fluid discharge passage in the housing, respectively, to open the second valve;
- means rigidly interconnecting the first and second valves for opening the first valve to start flow of the first fluid stream and for delayed opening of the second valve to start flow of the second fluid stream after flow of the first fluid stream has started, wherein the means for opening the first and second valves positions the first valve passage in fluid communication with the first fluid supply and discharge passages, followed by positioning of the second valve passage in fluid communication with the second fluid supply and discarged passages while the first valve passage remains in fluid communication with the first fluid supply and discharge passages;
- and
- means disposed within the housing for mixing the first fluid stream and the second fluid stream to discharge a mixed fluid stream.
3 more elements
A spray gun for mixing a first fluid stream with a second fluid stream and discharging a mixed fluid stream, comprising:
- a hand-held housing;
- a first valve disposed within the housing for controlling the flow of the first fluid stream through the housing;
- a second valve disposed within the housing for controlling the flow of the second fluid stream through the housing;
- means disposed within the housing for mixing the first fluid stream and the second fluid stream to discharge a mixed fluid stream;
- and
- means regidly interconnecting the first and second valves for opening the first valve to start flow of the first fluid stream and for delayed opening of the second valve to start flow of the second fluid stream after flow of the first stream has started, wherein the means for opening the first and second valves comprise:
- rotor means for connecting the first valve and the second valve;
- and
- means connected to the rotor means for rotating the rotor means to open the first and second valves, the first valve opening before the second value.
6 more elements
A spray gun for mixing a first fluid stream with a second fluid stream and discharging a mixed fluid stream, comprising:
- a hand-held housing;
- a first valve disposed within the housing for controlling the flow of the first fluid stream through the housing;
- a second valve disposed within the housing for controlling the flow of the second fluid stream through the housing;
- means rigidly interconnecting the first and second valves for opening the first valve to start flow of the first fluid stream and for delayed opening of the second valve to start flow of the second fluid steam after flow of the first fluid stream has started;
- means disposed within the housing for mixing the first fluid stream and the second fluid stream to discharge a mixed fluid stream;
- and
- actuating means coupled to the means for opening the first and second valves for actuating the means for opening the first and second valves, the actuating means being reversibly movable from an off position, in which the means for opening the first and second valves causes both the first valve and the second valve to be closed to prevent flow of the first and second fluid streams, respectivley, through an intermediate position, in which the means for opening the first and second valves causes the first valve to be open at least partially to permit flow of the first fluid stream and the second valve remains closed, to an on position in which the means for opening the first and second valves causes both the first valve and second valve to be open to permit flow of the first and second fluid streams, respectively.
4 more elements
The spray gun of clima 7, wherein the means for opening the first and second valves comprises:
- rotor means disposed within the housing for connecting the first valve and the second valve and reversibly rotatable from an off position, through an intermediate postion, to an on position corresponding to the off, intermediate and on positions of the actuating means, respectively;
- and
- coupling means for coupling the rotor means to the actuating means so that movement of he actuating means results in rotation of the rotor means.
The spray gun of claim 16, wherein the actuating means comprises:
- a pneumatic actuating chamber formed within the housing in fluid communication iwth the pneumatic supply and defining a first actuating port disposed in pneumatic communication with the first slide chamber portion and a second actuating port disposed in pneumatic communication with the second slide chamber portion;
- and
- an actuating piston having a first end slidably disposed within the actuating chamber and a second end projecting axially from the actuating chamber, the actuating piston being reversibly slidable between an off position, in which the first end of the actuating piston obstructs the second actuating port and permits pneumatic communication between the pneumatic supply and the first actuating port, and an on position, in which the first end of the actuating piston obstructs the first actuating port and permits pneumatic communication of the pneumatic supply with the second actuating port.
A spray gun for mixing a first fluid stream with a second fluid stream and discharging a mixed fluid stream, comprising:
- a hand-held housing;
- a first valve disposed within the housing for controlling the flow of the first fluid stream through the housing;
- a second valve disposed within the housing for controlling the flow of the second fluid stream through the housing;
- means rigidly interconnecting the first and second valves for opening the first valve to start flow of the first fluid stream and for delayed opening of the second valve to start flow of the second fluid stream after flow of the first fluid stream has started;
- means disposed within the housing for mixing the first fluid stream and the second fluid stream to discharge a mixed fluid stream;
- and
- a distributor disposed within the housing, the first and second fluid streams flowable from the first and second valves through the distributor for distributing the second fluid stream within the first fluid stream and then flowing into the means for mixing the first and second fluid streams.
4 more elements
An internal mix spray gun for mixing a first viscous liquid stream with a second viscous liquid stream and discharging a mixed liquid stream, comprising:
- a hand-held housing;
- a first valve disposed within the housing for controlling the flow of the first viscous liquid stream through the housing;
- a second valve disposed within the housing for controlling the flow of the second viscous liquid stream through the housing;
- means disposed within the housing for mixing the first viscous liquid stream and the second viscous liquid stream to discharge a mixed liquid stream;
- a distributor disposed within the housing, the first and second viscous liquid streams being flowable from the first and second valves, respectively, through the distributor as concentric streams for distributing the second viscous liquid stream within the first viscous liquid stream and then into the means for mixing the first and second viscous liquid streams.
2 more elements
A spray gun for mixing a first fluid stream with a second fluid stream and discharging a mixed fluid stream, comprising:
- a hand-held housing;
- a first valve disposed within the housing for controlling the flow of the first fluid stream through the housing;
- a second valve disposed within the housing for controlling the flow of the second fluid stream through the housing;
- means disposed within the housing for mixing the first fluid stream and the second fluid stream to discharge a mixed fluid stream;
- and
- a distributor disposed within the housing, the first and second fluid streams being flowable from the first and second valves, respectively, through the distributor for distributing the second fluid stream within the first fluid stream and then into the means for mixing the first and second fluid streams.
- wherein the distributor comprises a distribution plate including means for defining a central passage opening therethrough, the second fluid stream flowable through the central passage for discharge into a distribution chamber formed within the housing between the distribution plate and the means for mixing the first and second fluid streams, and having a plurality of secondary passages formed therethrough and disposed circumferentially in spaced-apart relationship around the central passage, the first fluid stream being flowable through the secondary passages for discharge into the distribution chamber, wherein the second fluid stream forms a generally annular stream when discharged from the central passage of the distribution plate, and the second fluid stream and first fluid stream are discharged from the distribution plate to form concentric, symmetrical streams that merge within the distribution chamber to distribute the second fluid within the first fluid stream.
4 more elements
A spray gun for mixing a first fluid stream with a second fluid stream and discharging a mixed fluid stream, comprising:
- a hand-held housing;
- a first valve disposed within the housing for controlling the flow of the first fluid stream through the housing;
- a second valve disposed within the housing for controlling the flow of the second fluid stream through the housing;
- rotor means for rigidly interconnecting the first and second valves, rotation of the rotor means resulting in opening the first and second valves to start flow of the first and second fluid streams;
- and
- means disposed within the housing for mixing the first fluid stream and the second fluid stream to discharge a mixed fluid stream.
3 more elements
A spray gun for mixing a first fluid stream with a second fluid stream and discharging a mixed fluid stream, comprising:
- a valve housing including a first valve and second valve for controlling the flow of the first and second fluid streams, respectively, through the valve housing;
- control means detachably mounted to the valve housing for controlling the opening of the first and second valves;
- and
- a mixer detachably mounted to the valve housing for mixing the first fluid stream and the second fluid stream to discharge a mixed fluid stream, the valve housing, control means, and mixer being selectively detachable to replace worn spray gun components and allow reconfiguration of the spray gun.
1 more element
A method for mixing a first fluid stream and a second fluid stream within a spray gun, comprising:
- opening rigidly interconnected first and second valves to start the flow of the first fluid stream and second fluid streams, respectively;
- distributing the second fluid stream into the first fluid stream prior to mixing the first and second fluid streams to form a mixed fluid stream;
- and
- discharging the mixed fluid stream.
1 more element
Dependencies are inferred from the claim text.