US3899134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spray gun
Assignee: Wagner International AG
•
Filing: 1974-06-13
•
Granted: 1975-08-12
•
Expires: 1994-06-13
Abstract
Abstract A piston pump spray gun with a detachable container for fluids, such as paint, to be sprayed is provided with a removable die cast metal or injection molded plastics one-piece pump housing and lid or cover for the container with the pump housing portion molded or cast around a hard metal cylinder sleeve for the piston and passages connecting the interior of the sleeve with the container without requiring seals to feed liquid from the container to the pump and for draining liquid back to the container. The one-piece part together with a piston operating in the cylinder sleeve is easily mounted on and removed from the main body of the spray gun by means of a single securing ring rotatable on the pump housing portion and threaded in the front of the main body of the gun. The one-piece molding or casting with its integrated hard metal cylinder eliminates leakage paths, reduces manufacturing costs, and facilitates replacement or repair of worn or broken parts.
Inventors
- 👤 Josef Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:02
CPC Classifications
B; B05; B05B; B05B9/00; B05B9/03; B05B9/04; B05B9/08; B05B9/085; B05B9/0855; B05B9/0861
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
304 words
A piston pump spray gun which comprises a housing having a depending handle, an electromagnetic motor with an oscillating armature in said housing, a switch in said handle controlling current flow to said motor, said housing having a bore communicating with said armature and with the front of the housing, a one-piece part having a pump housing sleeve fitting said bore with a hard metal cylinder sleeve therein, a piston slidable in said cylinder sleeve, a spring in said bore of the gun housing biasing said piston against said oscillating armature of said motor, an outlet valve in said pump housing sleeve portion bottomed against said cylinder sleeve, a spray nozzle on the outer end of said pump housing sleeve receiving fluid from said outlet valve, a locking ring rotatable on said pump housing sleeve threaded in said gun housing bore against said pump housing sleeve for securing the sleeve in the bore, said sleeve having a depending neck and a container cover suspended on said neck, said gun housing having a recess receiving said neck and a bottom wall receiving said cover, a removable liquids container suspended from said cover, said neck and cover having passages therethrough connecting the interior of the container with the interior of said cylinder sleeve, a suction tube extending from one of said passages to the bottom of said container and a collection chamber in said cylinder sleeve communicating with the other of said passages whereby said spring and said armature will reciprocate said piston to suck liquid from said container through said tube into said cylinder sleeve and will discharge the liquid in the sleeve past said outlet valve to said spray nozzle and said part is easily mounted in and removed from the bore and recess of said gun housing by manipulation of said locking ring.
Claim 2
Dependent Claim
304 words
A piston pump spray gun which comprises a housing having a depending handle, an electromagnetic motor with an oscillating armature in said housing, a switch in said handle controlling current flow to said motor, said housing having a bore communicating with said armature and with the front of the housing, a one-piece part having a pump housing sleeve fitting said bore with a hard metal cylinder sleeve therein, a piston slidable in said cylinder sleeve, a spring in said bore of the gun housing biasing said piston against said oscillating armature of said motor, an outlet valve in said pump housing sleeve portion bottomed against said cylinder sleeve, a spray nozzle on the outer end of said pump housing sleeve receiving fluid from said outlet valve, a locking ring rotatable on said pump housing sleeve threaded in said gun housing bore against said pump housing sleeve for securing the sleeve in the bore, said sleeve having a depending neck and a container cover suspended on said neck, said gun housing having a recess receiving said neck and a bottom wall receiving said cover, a removable liquids container suspended from said cover, said neck and cover having passages therethrough connecting the interior of the container with the interior of said cylinder sleeve, a suction tube extending from one of said passages to the bottom of said container and a collection chamber in said cylinder sleeve communicating with the other of said passages whereby said spring and said armature will reciprocate said piston to suck liquid from said container through said tube into said cylinder sleeve and will discharge the liquid in the sleeve past said outlet valve to said spray nozzle and said part is easily mounted in and removed from the bore and recess of said gun housing by manipulation of said locking ring.
Claim 3
Dependent Claim
20 words
The spray gun of claim 1 wherein said one piece part has a depending hollow stem receiving said suction tube.
Claim 4
Dependent Claim
47 words
The spray gun of claim 1 wherein the bore of the gun housing is cylindrical, the pump housing sleeve portion of the part snugly fits said bore and the recess of the gun housing is open at the front and snugly receives the neck of said part.
Claim 5
Dependent Claim
36 words
The spray gun of claim 1 wherein the pump housing portion of said part is integrally molded around said sleeve and said sleeve has an external groove receiving a portion of the molded pump housing portion.
Claim 6
Dependent Claim
100 words
In a piston pump spray gun having a housing, a motor in the housing for driving the piston pump and a depending container for material to be sprayed suspended from the housing, the improvements of a one-piece part having a pump housing portion fitting in said spray gun housing and integrally molded around a hard metal cylinder sleeve for the piston of the piston pump and a cover portion depending therefrom supporting said container with passageways connecting the container with the interior of the cylinder sleeve, and a locking means detachably securing said one-piece part to said spray gun housing.
Claim 7
Dependent Claim
100 words
In a piston pump spray gun having a housing, a motor in the housing for driving the piston pump and a depending container for material to be sprayed suspended from the housing, the improvements of a one-piece part having a pump housing portion fitting in said spray gun housing and integrally molded around a hard metal cylinder sleeve for the piston of the piston pump and a cover portion depending therefrom supporting said container with passageways connecting the container with the interior of the cylinder sleeve, and a locking means detachably securing said one-piece part to said spray gun housing.
Claim 8
Dependent Claim
42 words
The spray gun of claim 5 wherein the pump housing portion of the one-piece part is cylindrical and sized for snug fitting in the spray gun housing and a spray nozzle is secured on the end of said pump housing cylindrical portion.
Claim 9
Dependent Claim
22 words
The spray gun of claim 5 wherein the locking means is rotatably mounted on the pump housing portion of the one-piece part.
Claim 10
Dependent Claim
143 words
In a spray gun of the type having a motor housing, a motor in the housing, a piston pump driven by the motor in the housing and a container suspenDed from the housing to supply liquid to be sprayed to the pump together with a spray nozzle discharging the liquid from the pump, the improvements which comprise said housing having a bore opening adjacent said nozzle, a one-piece part having a portion removably insertable in said bore of the housing and molded around a cylinder sleeve forming the cylinder for the piston pump together with a cover portion depending therefrom supporting the container for the liquid to be sprayed and having passages connecting the container with the cylinder sleeve, and a locking ring rotatable on the one-piece part threaded in said bore of the housing releasably securing said one-piece part to said housing.
Claim 11
Dependent Claim
143 words
In a spray gun of the type having a motor housing, a motor in the housing, a piston pump driven by the motor in the housing and a container suspenDed from the housing to supply liquid to be sprayed to the pump together with a spray nozzle discharging the liquid from the pump, the improvements which comprise said housing having a bore opening adjacent said nozzle, a one-piece part having a portion removably insertable in said bore of the housing and molded around a cylinder sleeve forming the cylinder for the piston pump together with a cover portion depending therefrom supporting the container for the liquid to be sprayed and having passages connecting the container with the cylinder sleeve, and a locking ring rotatable on the one-piece part threaded in said bore of the housing releasably securing said one-piece part to said housing.
Claim 12
Dependent Claim
39 words
The spray gun of claim 8 wherein the portion of the one-piece part insertable in the bore of the housing has a front end projecting from the housing and a spray nozzle is removably secured on said front end.
Claim 13
Dependent Claim
103 words
A one-piece cast or molded part for removable attachment to the housing of a spray gun having a supply container which comprises a member having a sleeve portion insertable in a spray gun housing providing a pump housing and surrounding a pump cylinder sleeve in integrated relationship therewith together with a depending neck portion suspending a lid adapted to receive and support the supply container for the gun, said member having passages therethrough joining the interior of the cylinder sleeve with the interior of said lid, and a locking member on said one-piece part for detachably uniting the part to the spray gun.
Claim 14
Dependent Claim
103 words
A one-piece cast or molded part for removable attachment to the housing of a spray gun having a supply container which comprises a member having a sleeve portion insertable in a spray gun housing providing a pump housing and surrounding a pump cylinder sleeve in integrated relationship therewith together with a depending neck portion suspending a lid adapted to receive and support the supply container for the gun, said member having passages therethrough joining the interior of the cylinder sleeve with the interior of said lid, and a locking member on said one-piece part for detachably uniting the part to the spray gun.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |