US4676435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sprayer head
Assignee: Individual
•
Filing: 1986-04-01
•
Granted: 1987-06-30
•
Expires: 2006-04-01
Abstract
Abstract A sprayer comprising a housing (10) having an internal aperture in which a spool (12) is mounted for translational movement is disclosed. The spool has a nozzle (32) mounted to it. A cavity (30), formed in the spool, is configured to provide a passageway for directing fluid from an inlet (20) in the housing to the nozzle when the sprayer is in a spraying position. The cavity also provides a fluid passageway from the fluid inlet to a fluid outlet (21), which is also formed in the housing. The latter fluid passageway permits a reverse fluid flow through the nozzle. The direction of the reverse fluid flow is opposite to spraying flow direction. Thus, the reverse fluid flow cleans the nozzle by removing matter that clogs the nozzle. A pneumatically actuated, double-acting piston and cylinder assembly is used to move the spool between the spraying position and the cleaning position.
Inventors
- 👤 Nickolas B. Nesland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:18
CPC Classifications
B; B05; B05B; B05B15/00; B05B15/50; B05B15/52; B05B15/531; Y; Y10; Y10S; Y10S251/00; Y10S251/90; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86879
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
190 words
A sprayer head comprising: (a) an elongate housing including: (i) a longitudinal aperture; (ii) a fluid inlet extending between the exterior of said housing and said longitudinal aperture; and, (iii) a fluid outlet extending between the exterior of said housing and said longitudinal aperture; (b) a nozzle; (c) an elongate spool mounted in said longitudinal aperture for translational movement between a spraying position and a cleaning position, said spool including a cavity having a plurality of orifices located on the outer surface of said spool, one of said orifices positioned so as to be aligned with said fluid inlet when said spool is in said spraying position, said nozzle mounted in said cavity so as to spray fluid from another of said orifices, said other orifice positioned so as to be aligned with said fluid inlet when said spool is in said cleaning position, one of said orifices positioned so as to be aligned with said fluid outlet when said spool is in said cleaning position; and, (d) linear actuation means mounted on one end of said housing for moving said spool between said spraying position and said cleaning position.
Claim 2
Dependent Claim
190 words
A sprayer head comprising: (a) an elongate housing including: (i) a longitudinal aperture; (ii) a fluid inlet extending between the exterior of said housing and said longitudinal aperture; and, (iii) a fluid outlet extending between the exterior of said housing and said longitudinal aperture; (b) a nozzle; (c) an elongate spool mounted in said longitudinal aperture for translational movement between a spraying position and a cleaning position, said spool including a cavity having a plurality of orifices located on the outer surface of said spool, one of said orifices positioned so as to be aligned with said fluid inlet when said spool is in said spraying position, said nozzle mounted in said cavity so as to spray fluid from another of said orifices, said other orifice positioned so as to be aligned with said fluid inlet when said spool is in said cleaning position, one of said orifices positioned so as to be aligned with said fluid outlet when said spool is in said cleaning position; and, (d) linear actuation means mounted on one end of said housing for moving said spool between said spraying position and said cleaning position.
Claim 3
Dependent Claim
35 words
The sprayer head claimed in claim 1, wherein said housing and said spool are configured such that said orifice from which said nozzle sprays fluid is exposed when said spool is in said spraying position.
Claim 4
Dependent Claim
96 words
The sprayer head claimed in claim 1, wherein said cavity has three orifices located in the outer surface of said spool, the first orifice positioned so as to be aligned with said fluid inlet when said spool is in said spraying position, said nozzle mounted in said cavity so as to spray from the second orifice, said second orifice positioned so as to be aligned with said fluid inlet when said spool is in said cleaning position, the third orifice positioned to be aligned with said fluid outlet when said spool is in said cleaning position.
Claim 5
Dependent Claim
59 words
The sprayer head claimed in claim 3, including first sealing means located in the wall of said longitudinal aperture in said housing for sealing said first orifice when said spool is in said cleaning position and second sealing means located in the wall of said housing for sealing said third orifice when said spool is in said spraying position.
Claim 6
Dependent Claim
46 words
The sprayer head claimed in claim 4, wherein each of said first and second sealing means includes a recess formed in the wall of said longitudinal aperture, a seal element mounted in said recess and a pressing means for pressing said seal means toward said spool.
Claim 7
Dependent Claim
35 words
The sprayer head claimed in claim 5, wherein: said seal means comprises a flat plate; and said pressing means comprises a resilient means position in said recess for pressing said flat plate against said spool.
Claim 8
Dependent Claim
14 words
The sprayer head claimed in claim 6, wherein said flat plate has a hole.
Claim 9
Dependent Claim
14 words
The sprayer head claimed in claim 7, wherein said resilient means comprises an O-ring.
Claim 10
Dependent Claim
37 words
The sprayer claimed in claim 4, wherein said cavity is comprised of a transverse branch extending between said second orifice and said third orifice and an L-shaped branch extending from said first orifice to said transverse branch.
Claim 11
Dependent Claim
32 words
The sprayer head claimed in claim 9, wherein said fluid inlet, said transverse branch of said cavity, and said fluid outlet are coaxially aligned when said sprayer is in said cleaning position.
Claim 12
Dependent Claim
46 words
The sprayer head claimed in claim 10, wherein each of said first and second sealing means includes a recess formed in the wall of said longitudinal aperture, a seal element mounted in said recess and a pressing means for pressing said seal means toward said spool.
Claim 13
Dependent Claim
35 words
The sprayer head claimed in claim 11, wherein: said seal means comprises a flat plate; and said pressing means comprises a resilient means positioned in said recess for pressing said flat plate against said spool.
Claim 14
Dependent Claim
14 words
The sprayer head claimed in claim 12, wherein said flat plate has a hole.
Claim 15
Dependent Claim
14 words
The sprayer head claimed in claim 13, wherein said resilient means comprises an O-ring.
Claim 16
Dependent Claim
29 words
The sprayer head claimed in claim 10, wherein said linear actuation means comprises a pneumatically actuated, double-acting piston, and a rod that mechanically links said spool to said piston.
Claim 17
Dependent Claim
46 words
The sprayer head claimed in claim 15, wherein each of said first and second sealing means includes a recess formed in the wall of said longitudinal aperture, a seal element mounted in said recess and a pressing means for pressing said seal means toward said spool.
Claim 18
Dependent Claim
35 words
The sprayer head claimed in claim 16, wherein: said seal means comprises a flat plate; and said pressing means comprises a resilient means position in said recess for pressing said flat plate against said spool.
Claim 19
Dependent Claim
14 words
The sprayer head claimed in claim 17, wherein said flat plate has a hole.
Claim 20
Dependent Claim
14 words
The sprayer head claimed in claim 18, wherein said resilient means comprises an O-ring.
References Cited (Backward Citations)
US1304384A
Cited
US2887736A
Cited
US3146793A
Cited
US3593920A
Cited
US3959024A
Cited
US3985300A
Cited
US4116386A
Cited
US4423741A
Cited
US4365563A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-06-29 | 1990-12-29 | 1991-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-29 | 1994-12-29 | 1995-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-29 | 1998-12-29 | 1999-06-30 | $7700.00 | Window Closed / Lapsed |