EP0207501A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
An automatic aspirator-transfer valve, and a jet washing apparatus comprising such a valve
Assignee: K E W INDUSTRI AS
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Filing: 1986-07-01
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Granted: —
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Expires: 2006-07-01
Abstract
Abstract In an automatic aspirator-transfer valve controlling the delivery of washing fluid from a supply (M) to a cleaning gun (B) and having a valving piston (2) movable between a first or rinsing position (Top Figure), in which it opens bypass conduits (15) bypassing an injector (3,21,4) and a second or washing position (Bottom Figure) in which it closes said bypass conduit (15) and enables the injector (3,21,4) to aspirate washing fluid from a reservoir (not shown) through a non-return valve (11), a side inlet (5) and a conduit (22) to its side inlet (21), the novel aspect is that the side inlet conduit (22) is separated from the space within the housing bore (20), in which the valving piston (2) can slide. In this manner it is avoided that a portion of the washing agent may fill the space within the housing bore (20) and leave the valve in the form of a "plug" when changing from the washing mode (Bottom Figure) to the rinsing mode (Top-Figure), thus avoiding both the issuing of dangerously high concentrations and unnecessary waste of washing agent.
Inventors
- 👤 Tage Ostergaard
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-10 00:36
CPC Classifications
B; B05; B05B; B05B7/00; B05B7/24; B05B7/26; B05B7/28; B05B7/30; B05B12/00; B05B12/08; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87571; Y10T137/87587; Y10T137/87643
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
255 words
An automatic aspirator-transfer valve of the kind comprising a) a housing (1) with a first inlet (18) and an outlet (19), b) an injector (3,4) placed between and communicating with said first inlet (18) and said outlet (19) and having a side inlet (21) communicating with a second inlet (5) on the outside of said housing (1), c) a housing bore (20) between and communicating with said first inlet (18) and said injector (3,4), and d) a valving piston (2) with a passage (17) interconnecting its both ends, the upstream end communicating with said housing inlet (18) and the downstream end communicating with the inlet nozzle (3) of said injector (3,4), said piston (2) being slidable under the influence of variations in pressure differentials between surfaces facing upstream and surfaces facing downstream between a first, upstream-most position (Figures 1, 4 and 6), in which the downstream end of said piston passage (17) communicates through an open valving gap (7, .7') between the downstream end of the piston (2) and an upstream extension (16,16') of said injector inlet nozzle (3) with bypass conduits (15) leading to said housing outlet (19), and a second, downstream-most position (Figures 3,5 and 7), in which said valving gap (7, 7') is closed by the downstream end of said piston (2) engaging said upstream extension (16,16'), characterized in e) that the connection between said side inlet (21) of said injector (3,4) and said housing second inlet (5) is constituted by at least one conduit (22) separated from said bypass conduits (15).
Claim 2
Dependent Claim
255 words
An automatic aspirator-transfer valve of the kind comprising a) a housing (1) with a first inlet (18) and an outlet (19), b) an injector (3,4) placed between and communicating with said first inlet (18) and said outlet (19) and having a side inlet (21) communicating with a second inlet (5) on the outside of said housing (1), c) a housing bore (20) between and communicating with said first inlet (18) and said injector (3,4), and d) a valving piston (2) with a passage (17) interconnecting its both ends, the upstream end communicating with said housing inlet (18) and the downstream end communicating with the inlet nozzle (3) of said injector (3,4), said piston (2) being slidable under the influence of variations in pressure differentials between surfaces facing upstream and surfaces facing downstream between a first, upstream-most position (Figures 1, 4 and 6), in which the downstream end of said piston passage (17) communicates through an open valving gap (7, .7') between the downstream end of the piston (2) and an upstream extension (16,16') of said injector inlet nozzle (3) with bypass conduits (15) leading to said housing outlet (19), and a second, downstream-most position (Figures 3,5 and 7), in which said valving gap (7, 7') is closed by the downstream end of said piston (2) engaging said upstream extension (16,16'), characterized in e) that the connection between said side inlet (21) of said injector (3,4) and said housing second inlet (5) is constituted by at least one conduit (22) separated from said bypass conduits (15).
Claim 3
Dependent Claim
50 words
A valve as claimed in claim 1, characterized in that the downstream end of said piston (2) and said upstream extension (16,16') of said injector inlet nozzle (3) are mutually shaped in such a manner as to allow one to enter into the other, forming said valving gap (7, 7').
Claim 4
Dependent Claim
113 words
A valve as claimed in claim 2 and with said housing bore (20) and said injector (3,4) with said upstream extension (16,16 * ) substantially coaxial with each other, characterized in a) that said downstream end of said piston (2) and said upstream extension (16,16') of said injector inlet nozzle (3) are mutually shaped in such a manner as to allow said downstream extension (16,16') to enter into the downstream end of said piston passage (17), so that said valving gap (7, 7') formed thereby when open diverges in the downstream direction, and b) that said bypass conduits (15) extend generally in continuation of said valving gap (7,'.7') towards said housing outlet (19).
Claim 5
Dependent Claim
49 words
A valve as claimed in any or any one of the claims 1-3 and having a spring (6) axially influencing said piston (2), characterized in that said spring (6) is arranged to influence said piston in a direction away from said first, upstream-most position towards said second, downstream-most position.
Claim 6
Dependent Claim
41 words
A valve as claimed in claim 4, characterized in that said spring (6) is arranged to influence said piston in said direction only through a first part of its possible stroke of movement from said first position to said second position.
Claim 7
Dependent Claim
41 words
A valve as claimed in any or any one of claims 1-5 and having a spring (6) influencing said piston (2), characterized in that said spring (6) is placed on the outside of said piston (2) inside said housing bore (20).
Claim 8
Dependent Claim
207 words
A washing apparatus for alternately effecting washing at low pressure and high-pressure jet cleaning and of the kind comprising a) a supply (M,S) of washing fluid at high pressure, b) a supply (at 5) of washing agent to be admixed to said washing fluid during periods of washing at low pressure, c) an automatic aspirator-transfer valve of the kind set forth in the preamble of claim 1, and d) a gun (B,C) comprising at least one outlet nozzle (6) for fluid supplied through said valve from said supply or supplies, said gun having means for increasing the flow cross-sectional area in order to lower the pressure in the outlet from said valve for controlling its operation, characterized in e) that said valve is a valve having also the features set forth in the characterizing clause of claim 1, possibly also the features set forth in any or any one of the claims 2-6, and f) that said gun (B,C) comprises more than one nozzle (C) and is arranged alternately and under manual control to connect a smaller number of nozzles or a greater number of nozzles to the outlet of said valve, so as to effect the requisite change in flow cross-sectional area for controlling said valve.
Claim 9
Dependent Claim
16 words
A washing apparatus as claimed in claim 7, characterized in that said smaller number is one.
Claim 10
Dependent Claim
16 words
A washing apparatus as claimed in claim 8, characterized in that said greater number is two.
Claim 11
Dependent Claim
10 words
An automatic aspirator-transfer valve, substantially as herein shown and described.
Claim 12
Dependent Claim
10 words
An automatic aspirator-transfer valve, substantially as herein shown and described.
Claim 13
Dependent Claim
14 words
A washing apparatus with an automatic aspirator-transfer valve, substantially as herein shown and described.
Claim 14
Dependent Claim
14 words
A washing apparatus with an automatic aspirator-transfer valve, substantially as herein shown and described.
Claim 15
Dependent Claim
6 words
Any invention herein shown and/or described.
Claim 16
Dependent Claim
6 words
Any invention herein shown and/or described.
References Cited (Backward Citations)
No citation records indexed.
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