US3910764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water testing device
Assignee: Individual
•
Filing: 1974-12-23
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Granted: 1975-10-07
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Expires: 1994-12-23
Abstract
Abstract An apparatus for testing water by use of a reagent to determine chemical characteristics such as pH or chlorine content. A chamber is provided to hold a water sample of fixed predetermined amount, and a reservoir or reservoirs are provided for the selected reagents. A mechanical plunger operates a gate which seals the water sample chamber, and also activates a mechanism which forces a predetermined amount of reagent from a reagent measuring chamber into the water sample chamber. Comparison color samples are provided for comparing the color or appearance of the water reagent mixture in the water sample container to determine the presence and amount of the component for which the water is being tested.
Inventors
- 👤 Ronald H Tower
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:46
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/18; G01N31/00; G01N31/22; G01N33/1813; G01N33/182
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
178 words
A PORTABLE, HAND-HELD WATER TESTING DEVICE, COMPRISING A BODY, HAVING AT LEAST ONE REAGENT MEASURING CHAMBER FORMED THEREIN, AT LEAST ONE WATER SAMPLE CHAMBER ATTACHED TO THE BODY, EACH WATER SAMPLE CHAMBER HAVING AN OPEN UPPER END AND A CLOSED LOWER END, ONE WATER SAMPLE CHAMBER BEING ASSOCIATED WITH AND IN COMMUNICATION WITH A REAGENT MEASURING CHAMBER, AT LEAST ONE REAGENT RESERVOIR, ONE REAGENT RESERVOIR BEING ASSOCIATED WITH AND IN COMMUNICATION WITH EACH REAGENT MEASURING CHAMBER, A PLUNGER, MOUNTED TO THE BODY AND HAVING AT LEAST ONE MOVABLE GATE CONNECTED THERETO, THE NUMBER OF GATES CORRESPONDING TO THE NUMBER OF WATER SAMPLE CHAMBERS, SAID PLUNGER BEING MOVABLE BETWEEN A CLOSED POSITION WHEREIN A GATE SEALS THE OPEN END OF EACH WATER SAMPLE CHAMBER, AND A REST POSITION WHEREIN SAID WATER SAMPLE CHAMBER REMAINS OPEN, BIASING MEANS WHICH URGE THE PLUNGER TOWARD THE REST POSITION, AND MEANS OPERATED BY THE PLUNGER FOR FORCING A PREDETERMINED AMOUNT OF REAGENT FROM THE REAGENT MEASURING CHAMBER INTO THE WATER SAMPLE CHAMBER WHEN THE OPEN END OF THE WATER SAMPLE CHAMBER IS SEALED.
Claim 2
Dependent Claim
178 words
A PORTABLE, HAND-HELD WATER TESTING DEVICE, COMPRISING A BODY, HAVING AT LEAST ONE REAGENT MEASURING CHAMBER FORMED THEREIN, AT LEAST ONE WATER SAMPLE CHAMBER ATTACHED TO THE BODY, EACH WATER SAMPLE CHAMBER HAVING AN OPEN UPPER END AND A CLOSED LOWER END, ONE WATER SAMPLE CHAMBER BEING ASSOCIATED WITH AND IN COMMUNICATION WITH A REAGENT MEASURING CHAMBER, AT LEAST ONE REAGENT RESERVOIR, ONE REAGENT RESERVOIR BEING ASSOCIATED WITH AND IN COMMUNICATION WITH EACH REAGENT MEASURING CHAMBER, A PLUNGER, MOUNTED TO THE BODY AND HAVING AT LEAST ONE MOVABLE GATE CONNECTED THERETO, THE NUMBER OF GATES CORRESPONDING TO THE NUMBER OF WATER SAMPLE CHAMBERS, SAID PLUNGER BEING MOVABLE BETWEEN A CLOSED POSITION WHEREIN A GATE SEALS THE OPEN END OF EACH WATER SAMPLE CHAMBER, AND A REST POSITION WHEREIN SAID WATER SAMPLE CHAMBER REMAINS OPEN, BIASING MEANS WHICH URGE THE PLUNGER TOWARD THE REST POSITION, AND MEANS OPERATED BY THE PLUNGER FOR FORCING A PREDETERMINED AMOUNT OF REAGENT FROM THE REAGENT MEASURING CHAMBER INTO THE WATER SAMPLE CHAMBER WHEN THE OPEN END OF THE WATER SAMPLE CHAMBER IS SEALED.
Claim 3
Dependent Claim
23 words
The portable, hand-held water testing device defined in claim 1 having one water sample chamber, one reagent measuring chamber, and one reagent reservoir.
Claim 4
Dependent Claim
23 words
The portable, hand-held water testing device defined in claim 1 having two water sample chambers, two reagent measuring chambers, and two reagent reservoirs.
Claim 5
Dependent Claim
19 words
The portable, hand-held water testing device defined in claim 1 wherein each reagent reservoir is formed within the body.
Claim 6
Dependent Claim
19 words
The portable, hand-held water testing device defined in claim 1 wherein each reagent reservoir is attached to the body.
Claim 7
Dependent Claim
82 words
The portable, hand-held water testing device defined in claim 1 wherein the means for forcing reagent into the water sample chamber comprises: a piston mounted within the reagent chamber and operably connected to the plunger such that movement of the plunger to the closed position forces the piston through the reagent chamber, thereby forcing reagent from the reagent measuring chamber into the water sample chamber; and biasing means connected to the piston which urges the piston away from the water sample chamber.
Claim 8
Dependent Claim
17 words
The portable, hand-held water testing device defined in claim 6 wherein the biasing means is a spring.
References Cited (Backward Citations)
US3692490A
Cited
US3718435A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |