US3613997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acid aspirator system
Assignee: L AND A PRODUCTS Inc
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Filing: 1970-05-18
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Granted: 1971-10-19
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Expires: 1990-05-18
Abstract
Abstract A hydraulic system which receives and pumps water at high pressure to a spray nozzle for washing and cleaning purposes. The system includes an aspirator-transfer valve downstream of the pump which functions to receive water from the pump and direct it to the spray nozzle under one cycle of operation, and, under a second cycle of operation, to block the major flow of water from the pump and aspirate cleaning acid from a separate source to be mixed with water in the valve and on to the nozzle without passing through the pump.
Inventors
- 👤 Richard G Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:22
CPC Classifications
B; B05; B05B; B05B7/00; B05B7/24; B05B7/26; B05B7/28; B05B7/30; B01; B01F; B01F25/00; B01F25/105; B01F25/1051; F; F02; F02D; F02D1/00; F02D2700/00; F02D2700/02; F02D2700/0269; F02D2700/0282; F02D2700/0284; F02D2700/0292; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2514; Y10T137/2521; Y10T137/2526; Y10T137/8593; Y10T137/87571; Y10T137/87587; Y10T137/87619; Y10T137/87627
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
150 words
An aspirator-transfer valve, comprising: a. a valve body having first and second fluid inlets and a fluid outlet; b. first and second separate fluid passages connecting the first inlet and the outlet; c. valve means responsive to fluid flow in the first inlet for establishing fluid communication between the first inlet and the first passage in response to a first flow condition, and for establishing fluid communication between the first inlet and the second passage in response to a second flow condition; d. the first passage including check valve means disposed downstream of the flow responsive valve means; e. the second passage including fluid restriction means downstream of the flow responsive valve means and aspirating throat means downstream of the fluid restriction means; f. and a third passage connecting the second inlet with the second fluid passage at a point between the fluid restriction means and the aspirating throat means.
Claim 2
Dependent Claim
150 words
An aspirator-transfer valve, comprising: a. a valve body having first and second fluid inlets and a fluid outlet; b. first and second separate fluid passages connecting the first inlet and the outlet; c. valve means responsive to fluid flow in the first inlet for establishing fluid communication between the first inlet and the first passage in response to a first flow condition, and for establishing fluid communication between the first inlet and the second passage in response to a second flow condition; d. the first passage including check valve means disposed downstream of the flow responsive valve means; e. the second passage including fluid restriction means downstream of the flow responsive valve means and aspirating throat means downstream of the fluid restriction means; f. and a third passage connecting the second inlet with the second fluid passage at a point between the fluid restriction means and the aspirating throat means.
Claim 3
Dependent Claim
24 words
The aspirator-transfer valve as defined by claim 1, wherein the third passage is connected with the first passage upstream of the check valve means.
Claim 4
Dependent Claim
135 words
The aspirator-transfer valve as defined by claim 1, wherein the flow responsive valve means comprises: a movable closure member disposed in fluid communication with the first inlet and movable in response to the fluid flow therethrough, the closure member having an aperture formed therein through which fluid from the first inlet passes, the aperture being of lesser fluid resistance than the second passage fluid resistance means; a stationary seating member disposed to be sealably engaged by the closure member in valving relation, the seating member constructed and arranged to establish flow from said aperture to the first passage when not engaged by the closure member, and to establish flow from said aperture to the second passage when engaged by the closure member; and means for normally biasing the closure member away from the seating member.
Claim 5
Dependent Claim
24 words
The aspirator-transfer valve as defined by claim 3, wherein the movable closure member comprises a resilient flexure member peripherally supported by the valve body.
Claim 6
Dependent Claim
28 words
The aspirator-transfer valve as defined by claim 4, wherein the movable closure member comprises a piston slidably and sealably received in a cylindrical chamber in the valve body.
Claim 7
Dependent Claim
34 words
The aspirator-transfer valve as defined by claim 1, wherein the flow responsive valve means establishes fluid communication between the first inlet and the first and second passages in response to the first pressure condition.
Claim 8
Dependent Claim
79 words
The aspirator-transfer valve as defined by claim 3, wherein: a chamber is formed in the valve body; and the stationary seating member comprises a nozzle disposed in the chamber and having a mouth opening toward the closure member, the lip of the nozzle mouth being engageable by the closure member; the nozzle mouth forming a portion of the second passage; and a portion of the first passage being defined by the space between the chamber wall and the nozzle.
Claim 9
Dependent Claim
30 words
The aspirator-transfer valve as defined by claim 7, wherein the second passage fluid restriction means is formed in the nozzle mouth and disposed in alignment with the closure member aperture.
Claim 10
Dependent Claim
68 words
The aspirator-transfer valve as defined by claim 8, wherein the aspirating filter means comprises a fixed member with an aspirating throat passage formed therein, the fixed member being disposed in the valve body chamber with the aspirating throat passage in alignment with the second passage fluid restriction means, and a portion of the first passage is defined by the space between the chamber wall and the fixed member.
Claim 11
Dependent Claim
34 words
The aspirator-transfer valve as defined by claim 9, wherein the check valve means comprises a resilient collar encircling the fixed member and arranged for sealable engagement with the chamber wall in valving relation therewith.
Claim 12
Dependent Claim
156 words
A fluid pressure washing system comprising: a. first conduit means adapted for connection to a first source of fluid, the first conduit means including pumping means; b. second conduit means adapted for connection to a second source of fluid; c. third conduit means terminating in a spray nozzle; d. aspirator-transfer valve means having a first inlet connected to the first conduit means, a second inlet connected to the second conduit means and an outlet connected to the third conduit means, the valve means being responsive to flow in the system to establish fluid communication between the first and third conduit means for a first flow condition and to aspirate fluid from the second conduit means to the third conduit means for a second flow condition; e. first means for controlling flow in the system to effect said first flow condition; f. and second means for controlling flow in the system to effect said second flow condition.
Claim 13
Dependent Claim
156 words
A fluid pressure washing system comprising: a. first conduit means adapted for connection to a first source of fluid, the first conduit means including pumping means; b. second conduit means adapted for connection to a second source of fluid; c. third conduit means terminating in a spray nozzle; d. aspirator-transfer valve means having a first inlet connected to the first conduit means, a second inlet connected to the second conduit means and an outlet connected to the third conduit means, the valve means being responsive to flow in the system to establish fluid communication between the first and third conduit means for a first flow condition and to aspirate fluid from the second conduit means to the third conduit means for a second flow condition; e. first means for controlling flow in the system to effect said first flow condition; f. and second means for controlling flow in the system to effect said second flow condition.
Claim 14
Dependent Claim
70 words
The pressure washing system as defined by claim 11, wherein the first conduit means further comprises unloader valve means disposed downstream of the pumping means and connected to the inlet side of the pumping means through a bypass conduit, the unloader means constructed and arranged to divert fluid to the pumping means inlet when pressure in the first conduit means downstream of the pumping means reaches a predetermined upper limit.
Claim 15
Dependent Claim
33 words
The pressure washing system as defined by claim 11, wherein the first conduit means further comprises fluid accumulator means disposed between the pumping means and the first inlet of the aspirator-transfer valve means.
Claim 16
Dependent Claim
20 words
The pressure washing system as defined by claim 11, wherein fluid restriction means are disposed in the second conduit means.
Claim 17
Dependent Claim
15 words
The pressure washing system as defined by claim 14, wherein the restriction means is adjustable.
Claim 18
Dependent Claim
33 words
The pressure washing system as defined by claim 11, wherein the second conduit means further comprises check valve means arranged to permit fluid flow toward the second inlet of the aspirator-transfer valve means.
Claim 19
Dependent Claim
18 words
The pressure washing system as defined by claim 11, wherein the second conduit means further comprises a flowmeter.
Claim 20
Dependent Claim
25 words
The pressure washing system as defined by claim 11, wherein the first flow control means comprises a blocking valve disposed in the third conduit means.
Claim 21
Dependent Claim
26 words
The pressure washing system as defined by claim 11, wherein the second flow control means comprises dumping valve means operably connected to the third conduit means.
Claim 22
Dependent Claim
72 words
The pressure washing system as defined by claim 11, wherein: the pumping means is driven by an electric motor adapted for connection to a source of electric power; and further comprising pressure-electric switch means arranged to sense pressure in the first conduit means downstream of the pumping means and disconnect the electric motor from the source of electric power when pressure in in the first conduit means reaches a predetermined upper limit.
Claim 23
Dependent Claim
24 words
The pressure washing system as defined by claim 11, wherein the first flow control means comprises means for halting operation of the pumping means.
Claim 24
Dependent Claim
49 words
The pressure washing system as defined by claim 21, wherein: the pumping means is driven by an electric motor adapted for connection to a source of electric power; and the means for halting operation of the pumping means comprises a manually operated switch operatively connected to the electric motor.
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) | 1974-10-18 | 1975-04-19 | 1975-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-18 | 1979-04-19 | 1979-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-18 | 1983-04-19 | 1983-10-19 | $7700.00 | Window Closed / Lapsed |