US3645450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solids abrading device
Assignee: Individual
•
Filing: 1970-05-22
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Granted: 1972-02-29
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Expires: 1990-05-22
Abstract
Abstract Airless spray equipment is described that is free from clogging. The clogging is prevented by passing the liquid, upstream of the spray tip, through anticlogging means comprising a constricted orifice which surrounds a mandrel that has a fluted end and that extends past the orifice entrance. The mandrel is slidably mounted in the orifice with a spring to bias it against movement by fluid pressure. Any solids in the liquid that would clog the spray tip are abraded by the action of the mandrel. In a preferred embodiment, the orifice and mandrel assembly is used with a pole spray extension having a slave valve at its discharge end to eliminate any spitting of liquid. The pole assembly is formed from a plurality of sections that are readily attachable with a threaded male coupling.
Inventors
- 👤 Oliver J Calder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:25
CPC Classifications
B; B05; B05B; B05B15/00; B05B15/50; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4245; Y10T137/4273; Y10T137/4336
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
226 words
A device for connection in a stream of pressured liquid and functioning to prevent the clogging of flow passageways encountered by said stream downstream of said device by solids in said liquid which comprises: a first member adapted to be connected to a supply of liquid under pressure, a flow passageway extending axially therethrough, orifice means defining a constructed flow passageway of reduced cross-sectional area, a second member having a base portion and a shank portion of a reduced diameter positioned in said flow passageway with said Shank portion extending through and terminating slightly upstream of said orifice means, means retaining said second member within said passageway of said first member while permitting relative movement between said first and second members which comprises shoulder means downstream of said orifice means and engaged by said base portion of said second member, resilient means to urge relative movement between said first and second members in opposition to fluid pressure from said supply and to bias said base portion of said second member against said shoulder means, and a surface roughened to depths of from 0.001 to 0.010 inch on at least one of the opposed surfaces of said orifice and said second member whereby to abrade any solids in said stream to a sufficiently small size to permit their passage through said flow passageways downstream of said device.
Claim 2
Independent Claim
226 words
A device for connection in a stream of pressured liquid and functioning to prevent the clogging of flow passageways encountered by said stream downstream of said device by solids in said liquid which comprises: a first member adapted to be connected to a supply of liquid under pressure, a flow passageway extending axially therethrough, orifice means defining a constructed flow passageway of reduced cross-sectional area, a second member having a base portion and a shank portion of a reduced diameter positioned in said flow passageway with said Shank portion extending through and terminating slightly upstream of said orifice means, means retaining said second member within said passageway of said first member while permitting relative movement between said first and second members which comprises shoulder means downstream of said orifice means and engaged by said base portion of said second member, resilient means to urge relative movement between said first and second members in opposition to fluid pressure from said supply and to bias said base portion of said second member against said shoulder means, and a surface roughened to depths of from 0.001 to 0.010 inch on at least one of the opposed surfaces of said orifice and said second member whereby to abrade any solids in said stream to a sufficiently small size to permit their passage through said flow passageways downstream of said device.
Claim 3
Dependent Claim
26 words
The device of claim 1 wherein said first member is a tubular housing with an axial flow passageway therethrough and said second member is mounted therein.
Claim 4
Dependent Claim
19 words
The device of claim 1 wherein said orifice means is positioned on the upstream face of said first member.
Claim 5
Dependent Claim
31 words
The device of claim 1 wherein said orifice comprises a ring that is removably mounted in an annular groove about the upstream portion of the flow passageway through said first member.
Claim 6
Dependent Claim
82 words
The combination of the device of claim 1 mounted downstream of a first valve means in said fluid supply means and a second valve means remotely positioned downstream of said first valve means with means to apply pressure of said fluid to said second valve means to urge said second valve means into an open position, resilient means to urge said second valve means into a closed position whereby to synchronize the opening and closing of said first and second valve means.
Claim 7
Dependent Claim
91 words
The combination of claim 5 wherein said second valve means comprises a body member having a discontinuous bore, a face plate with a central bore with an annular seat about said central bore butted against said body member, valve closure means positioned in said discontinuous bore having a base and a reduced diameter downstream end with an annular shoulder therebetween, resilient means biasing said closure means against said annular seat and at least one fluid passageway through said body member and communicating with said discontinuous bore downstream of said annular shoulder.
Claim 8
Dependent Claim
70 words
The combination of claim 5 wherein at least one boom extension is removably mounted between said first and second valve means and comprises a central conduit having terminal threaded portions surrounded by bushing means and a second larger diameter conduit extending concentrically about said first conduit and mounted on said bushing means with the terminal faces of said extensions having annular grooves and resilient sealing means positioned in said grooves.
Claim 9
Dependent Claim
28 words
The device of claim 2 wherein said second member has an internal flow passageway communicating with said flow passageway at points upstream and downstream of said shoulder means.
Claim 10
Dependent Claim
25 words
The device of claim 1 wherein the ratio of the length of said orifice to the maximum movement of said members is less than 1.0.
Claim 11
Dependent Claim
27 words
The device of claim 9 wherein said second member has a shank portion extending through said orifice and wherein the surface of said shank portion is roughened.
Claim 12
Dependent Claim
17 words
The device of claim 1 wherein the width of said orifice is from 0.0025 to 0.001 inch.
Claim 13
Dependent Claim
21 words
The device of claim 10 wherein said shank portion is fluted with grooves having a depth from 0.001 to 0.010 inch.
Claim 14
Dependent Claim
20 words
The device of claim 9 wherein said shank portion extends from 0.100 to 0.125 inch upstream of said orifice means.
Claim 15
Independent Claim
179 words
A device for connection in a stream of pressured liquid and functioning to prevent the clogging of flow passageways encountered by said stream downstream by solids in said liquid which comprises: a first member adapted to be connected to a supply of liquid under pressure; a Flow passageway therethrough; orifice means defining a constricted flow passageway of reduced cross-sectional area and having a length along said flow passageway no greater than about 0.125 inch; a second member positioned in said flow passageway and extending through and terminating slightly upstream of said orifice means; means retaining said second member within said passageway of said first member while permitting relative movement between said first and second member; resilient means to urge relative movement between said first and second members in opposition to fluid pressure from said supply; and a roughened surface on at least one of the opposed surfaces of said orifice and said second member whereby any solids in said stream are abraded to a sufficiently small size to permit their passage through said flow passageways downstream of said orifice.
Claim 16
Independent Claim
179 words
A device for connection in a stream of pressured liquid and functioning to prevent the clogging of flow passageways encountered by said stream downstream by solids in said liquid which comprises: a first member adapted to be connected to a supply of liquid under pressure; a Flow passageway therethrough; orifice means defining a constricted flow passageway of reduced cross-sectional area and having a length along said flow passageway no greater than about 0.125 inch; a second member positioned in said flow passageway and extending through and terminating slightly upstream of said orifice means; means retaining said second member within said passageway of said first member while permitting relative movement between said first and second member; resilient means to urge relative movement between said first and second members in opposition to fluid pressure from said supply; and a roughened surface on at least one of the opposed surfaces of said orifice and said second member whereby any solids in said stream are abraded to a sufficiently small size to permit their passage through said flow passageways downstream of said orifice.
Claim 17
Dependent Claim
16 words
The device of claim 14 wherein said orifice has a length from 0.02 to 0.04 inch.
Claim 18
Dependent Claim
24 words
The device of claim 14 wherein said orifice has a length relative to the travel of said movement between said members less than 1.0.
Claim 19
Dependent Claim
74 words
The device of claim 14 wherein said second member has a base portion and a shank portion of a reduced diameter and said shank portion extends through said orifice with shoulder means downstream of said orifice and engaged by the base portion of said second member to retain said second member in said device against the bias of said resilient means and wherein the depth of surface roughening is from 0.001 to 0.010 inch.
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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |