US3628617A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid recirculating and weighing system
Assignee: GAF Corp
•
Filing: 1970-04-03
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Granted: 1971-12-21
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Expires: 1990-04-03
Abstract
Abstract Liquid dye is pumped by a pump submerged therein from a supply tank through a feed pipeline and into a portable bucket set on one side of a beam balance scale, until a preselected weight of such liquid in the bucket balances the scale, whereupon the other side initiates an electrical signal and operates a relay which energizes a control circuit, activating a solenoid which, in turn, operates valve means in such feed pipeline to switch the entire flow of liquid from the bucket, back to the tank through a liquid return pipe, thereby recirculating such liquid as long as the pump is running, which agitates the liquid dye in the tank, keeps the pump cool, and avoids any need for priming the pump prior to each weighing operation.
Inventors
- 👤 Richard V Ferrigan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:51
CPC Classifications
G; G01; G01G; G01G13/00; Y; Y10; Y10S; Y10S177/00; Y10S177/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
114 words
A liquid recirculating and weighing system comprising, in combination: a liquid reservoir; means for pumping liquid from said reservoir into a portable receptacle; means including a three-way valve unit for controlling the flow of the liquid from said pumping means, to such receptacle and back to the reservoir; means for weighing the liquid pumped into said receptacle, means operated by said weighing means for operating said threeway valve unit when the receptacle receives a certain weight of such liquid to shift the flow of liquid from the receptacle back to the reservoir; and means for then conducting liquid pumped by said pumping means back into the reservoir without any interruption of the pumping operation.
Claim 2
Dependent Claim
114 words
A liquid recirculating and weighing system comprising, in combination: a liquid reservoir; means for pumping liquid from said reservoir into a portable receptacle; means including a three-way valve unit for controlling the flow of the liquid from said pumping means, to such receptacle and back to the reservoir; means for weighing the liquid pumped into said receptacle, means operated by said weighing means for operating said threeway valve unit when the receptacle receives a certain weight of such liquid to shift the flow of liquid from the receptacle back to the reservoir; and means for then conducting liquid pumped by said pumping means back into the reservoir without any interruption of the pumping operation.
Claim 3
Dependent Claim
116 words
The invention as defined by claim 1, in which the reservoir comprises a liquid supply tank, the pumping means comprises an electric motor driven pump submerged in the liquid adjacent the bottom of said tank, the three-way valve unit operating means comprises a solenoid circuit, a source of light, and means directing a beam horizontally therefrom, a a photoelectric relay having a light-sensitive cell toward which such light beam is directed, and a beam balance scale adapted to support the receptacle on one side and having a selected standard weight-receiving pan provided with means adapted to break such light beam when the scale is balanced, whereby to operate said three-way valve by energizing said solenoid circuit.
Claim 4
Dependent Claim
149 words
The invention as defined by claim 2, in which a cover is provided for the top of said tank, a frame is mounted on said cover having a shelf on which said three-way valve is mounted; and a means supporting said photoelectric cell and relay, as well as said source of light on the top of said frame, with sufficient horizontal space therebetween for free vertical movement of said shaft about the axis of the beam balance scale, a flexible pipeline extending from the normally closed outlet way of said valve unit to a joint above a receptacle on the scale, a pipeline connecting the output of said pump to the input way of said valve unit, and a recirculating line connecting the normally open outlet way of said valve unit to the interior of the tank, whereby the discharge agitates the liquid between weighing cycles of the system.
References Cited (Backward Citations)
GB369369A
Cited
US2273180A
Cited
US2264562A
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US2597831A
Cited
US2787402A
Cited
US3263971A
Cited
US3306495A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |