US4252773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety chemical cartridge
Assignee: Individual
•
Filing: 1979-09-24
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Granted: 1981-02-24
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Expires: 1999-09-24
Abstract
Abstract A safety chemical cartridge for adaptation in an automatic chemical feeder apparatus. The cartridge including a cylinder-like chemical container having an outer surface with first and second ends and a middle portion spaced between the two ends. The container is of a predetermined diameter and includes safety removal means along the outer surface comprising the middle portion of the container including threads having a particular rotational sense; the second end zone defining a enlarged second end zone having a diameter approximately equal to the diameter of the thread structures along the middle portion of the container; additionally, the enlarged second end zone includes a flat portion which is defined by a chord along the second end and extending through the enlarged second end zone; and a barrier is spaced between the threads on the middle portion and the enlarged second end zone; the enlarged second end zone includes a top leading edge which, when in combination with the barrier, forms a second thread portion. The second thread portion is of an opposite rotational sense to the first threaded portion.
Inventors
- 👤 Robert Spiegel
- 👤 Bill Spiegel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:13
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/68; C02F1/685; C02F1/688; C02F2103/00; C02F2103/42
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
212 words
A safety chemical cartridge for adaptation in a automatic chemical feeder apparatus, the apparatus comprising: a cylinder-like chemical container means having an outer surface with first and second ends and a middle portion spaced between the two end, the container having a predetermined diameter and including safety removal means comprising: the middle portion of the container having a first thread means with a predetermined diameter, the diameter of the thread means being slightly greater than the diameter of the container, an enlarged second end zone adjacent the second end of the container having a diameter approximately equal to the diameter of the thread means, the second end including a chord wherein the chord defines a flat portion on the second end zone, and a barrier between the second end zone and the first thread means, the barrier having a predetermined diameter approximately equal to the diameter of the thread means, the barrier including a first leading edge adjacent the middle portion thread means and a second leading edge adjacent the second end zone, the combination of the second leading edge and the enlarged second end zone defining a second thread means, and the first thread means being of one rotational sense and the second thread means being of an opposite rotational sense.
Claim 2
Dependent Claim
212 words
A safety chemical cartridge for adaptation in a automatic chemical feeder apparatus, the apparatus comprising: a cylinder-like chemical container means having an outer surface with first and second ends and a middle portion spaced between the two end, the container having a predetermined diameter and including safety removal means comprising: the middle portion of the container having a first thread means with a predetermined diameter, the diameter of the thread means being slightly greater than the diameter of the container, an enlarged second end zone adjacent the second end of the container having a diameter approximately equal to the diameter of the thread means, the second end including a chord wherein the chord defines a flat portion on the second end zone, and a barrier between the second end zone and the first thread means, the barrier having a predetermined diameter approximately equal to the diameter of the thread means, the barrier including a first leading edge adjacent the middle portion thread means and a second leading edge adjacent the second end zone, the combination of the second leading edge and the enlarged second end zone defining a second thread means, and the first thread means being of one rotational sense and the second thread means being of an opposite rotational sense.
Claim 3
Dependent Claim
77 words
A chemical feeder apparatus comprising, in combination with the cartridge of claim 1, a frame means for removably captivating the container, the frame means including a compartment portion and inlet and outlet means, the compartment portion including a floor and safety removal means spaced a predetermined distance from the floor, the safety removal means being compatible with the container safety removal means and with the safety chemical cartridge in captivating and removable engagement with the frame means.
Claim 4
Dependent Claim
31 words
The apparatus as defined in claim 2 wherein the frame safety removal means comprises a chord spaced a predetermined distance from the frame means floor, the chord defining a thread segment.
Claim 5
Dependent Claim
43 words
The cartridge as defined in claim 1 wherein the barrier comprises thread reversal means and wherein the barrier is "C" shaped having a circumferential length approximately half the diameter of the container and being directly aligned with the flat portion of the container.
Claim 6
Dependent Claim
18 words
The cartridge as defined in claim 4 wherein the barrier is partially aligned with the container flat portion.
Claim 7
Dependent Claim
18 words
The cartridge as defined in claim 5 wherein the container includes removable seal means spanning the second end.
Claim 8
Dependent Claim
14 words
The cartridge as defined in claim 6 wherein the container chemical is chlorine supplying.
Claim 9
Dependent Claim
55 words
The apparatus as defined in claim 2 wherein the diameter of the thread means, the diameter of the barrier portion and the diameter of the enlarged second end zone are equal and wherein the diameter of the compartment portion is slightly greater than the diameter of the thread means, barrier and enlarged second end zone.
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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) | 1984-02-24 | 1984-08-25 | 1985-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-24 | 1988-08-25 | 1989-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-24 | 1992-08-25 | 1993-02-24 | $7700.00 | Window Closed / Lapsed |