US3670967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sanitary spray gun
Assignee: Graco Inc
•
Filing: 1971-03-11
•
Granted: 1972-06-20
•
Expires: 1991-03-11
Abstract
Abstract An airless sanitary spray gun which can be easily disassembled by hand. The fluid outlet housing of the gun has a valve to normally block the flow of fluid. Mounted on this housing is another housing designating the valve actuating housing. The device to join these two housings may consist of two locking members. One is a rotatable rod and groove combination wherein the rod extends through an opening in the valve actuating housing and is rotated to a locking position by engaging a groove in the top of the outlet housing. The other device, used to prevent rotation of the two housings relative to each other, may be one or more pins in the lower portion of the valve actuating housing with each pin engaging a notch in the upper portion of the outlet housing. Two types of valves are also disclosed. One embodiment is a small apertured spring biased needle type used for fine spraying operations. The other valve is a larger apertured dispensing type biased by a remote spring that utilizes a forced differential pressure principle to aid in keeping the valve seat seated. The gun may have its valve actuated either manually or automatically.
Inventors
- 👤 James R Fahlin
- 👤 Gerald D Hagfors
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:58
CPC Classifications
B; B05; B05B; B05B9/00; B05B9/01; F; F16; F16N; F16N5/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
112 words
A sanitary valve gun comprising: an inlet fluid conduit means having a housing; an outlet fluid conduit housing means having an outlet and being connected to and in fluid communication with the inlet conduit means; a valve means within the outlet housing conduit normally blocking the passage of fluid to the outlet; a disengageable valve actuating housing mounted on said outlet housing at the end opposite the fluid outlet, the housing having an opening therethrough and means to prevent rotation of the disengageable housing relative to the outlet housing; and rotatable rod means slidably insertable within the housing opening to lock the disengageable housing on the outlet housing from pulling away therefrom.
Claim 2
Dependent Claim
112 words
A sanitary valve gun comprising: an inlet fluid conduit means having a housing; an outlet fluid conduit housing means having an outlet and being connected to and in fluid communication with the inlet conduit means; a valve means within the outlet housing conduit normally blocking the passage of fluid to the outlet; a disengageable valve actuating housing mounted on said outlet housing at the end opposite the fluid outlet, the housing having an opening therethrough and means to prevent rotation of the disengageable housing relative to the outlet housing; and rotatable rod means slidably insertable within the housing opening to lock the disengageable housing on the outlet housing from pulling away therefrom.
Claim 3
Dependent Claim
37 words
The gun of claim 1 wherein the outlet housing has a groove on its upper end to receive in a locking relationship the rod inserted in the valve actuating housing opening when the rod is properly rotated.
Claim 4
Dependent Claim
63 words
The gun of claim 2 wherein the rod has a cross-sectional portion which is semi-circular on one side and planar on the other, the groove in the outlet housing being semi-circular and complementary in shape to the semi-circular portion of the rod whereby the outlet housing is locked to the valve actuating housing when the semi-circular rod portion is within the semi-circular groove.
Claim 5
Dependent Claim
40 words
The gun of claim 3 wherein the means to prevent rotation between the disengageable housing and the outlet housing comprises a pin member rigidly attached to the disengageable housing and a notch in the outlet housing to receive the pin.
Claim 6
Dependent Claim
44 words
The gun of claim 1 wherein the rotatable rod comprises a first and second member rigidly attached and substantially perpendicular to each other with the first member being external to the disengageable housing when the second member is inserted in the disengageable housing opening.
Claim 7
Dependent Claim
25 words
The gun of claim 5 wherein the disengageable housing has means to engage the first member of the rod and lock it against further rotation.
Claim 8
Dependent Claim
54 words
The gun of claim 1 wherein the valve means comprises a spring biased needle valve and a sanitary seal with the spring downwardly biasing the valve to cause the needle valve to block fluid flow, and the spring being between the seal and the end of the needle valve which blocks the fluid flow.
Claim 9
Dependent Claim
41 words
The gun of claim 7 including an apertured end cap removably connected to the outlet housing with a vee-shaped groove seat in cross-section therein to engage the end of the needle valve to block the aperture and thereby block fluid flow.
Claim 10
Dependent Claim
22 words
The gun of claim 1 including automatic actuating means to actuate the valve means and automatically discharge fluid from the gun outlet.
Claim 11
Dependent Claim
35 words
The gun of claim 9 wherein the valve means consists of a biased pressure differential valve with a biasing means, the biasing means not being in the flow path of the fluid which is discharged.
References Cited (Backward Citations)
US2532187A
Cited
US2659628A
Cited
US2792260A
Cited
US3001723A
Cited
US2937813A
Cited
US3599876A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |