US3842448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for recycling a fluid for use in a dental cuspidor
Assignee: Individual
•
Filing: 1973-03-29
•
Granted: 1974-10-22
•
Expires: 1993-03-29
Abstract
Abstract Apparatus for recycling a fluid for use in flushing a dental cuspidor of the type having a bowl, a faucet for introducing the flushing fluid into the bowl and a drain in the bowl from which the fluid is conducted to the recycling system. The recycling system comprises means for separating sedimentary material from the fluid. After the sedimentary material has been separated from the fluid, the fluid is directed to a means for filtering the fluid. The filtered fluid is then pumped to a storage means which retains the fluid under pressure until it is conducted back to the cuspidor. The system includes means for backwashing the filter means as well as means for eliminating excess fluid from the sediment and filter means should fluid overflow occur therein. Also provided are means for partially or wholly bypassing the recycling portion of the apparatus to permit the introduction of a regulated amount of fresh fluid into the system.
Inventors
- 👤 C Langbert
- 👤 S Kahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:28
CPC Classifications
A; A61; A61C; A61C17/00; A61C17/14
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
70 words
Apparatus for recycling a fluid for use in a dental cuspidor comprising a cuspidor bowl, a drain in said bowl, means for separating sedimentary material from said fluid, and separating means being in fluid communication with said drain, means for filtering said fluid, means for storing the filtered fluid under pressure and a cuspidor faucet in fluid communication with said pressure means for introducing the recycled fluid into said bowl.
Claim 2
Dependent Claim
70 words
Apparatus for recycling a fluid for use in a dental cuspidor comprising a cuspidor bowl, a drain in said bowl, means for separating sedimentary material from said fluid, and separating means being in fluid communication with said drain, means for filtering said fluid, means for storing the filtered fluid under pressure and a cuspidor faucet in fluid communication with said pressure means for introducing the recycled fluid into said bowl.
Claim 3
Dependent Claim
14 words
The apparatus according to claim 1 further comprising means for backwashing said filter means.
Claim 4
Dependent Claim
21 words
The apparatus according to claim 1 further comprising means for eliminating overflow fluid from said sediment means and said filter means.
Claim 5
Dependent Claim
24 words
The apparatus according to claim 1 further comprising means for bypassing said apparatus such that fresh fluid may be utilized instead of recycled fluid.
Claim 6
Dependent Claim
16 words
The apparatus according to claim 1 further comprising means for draining the fluid from said apparatus.
Claim 7
Dependent Claim
85 words
Apparatus for recycling fluid comprising a cuspidor having a bowl with a drain therein, an inlet pipe connected to said drain, a sediment tank in fluid communication with said inlet pipe, a filter tank in fluid communication with said sediment tank, a pressure tank for storing the filtered fluid, a pump for pumping said fluid from said filter tank to said pressure tank and an outlet pipe in fluid communication with said pressure tank and connected to said cuspidor for introducing the recycled fluid therein.
Claim 8
Dependent Claim
85 words
Apparatus for recycling fluid comprising a cuspidor having a bowl with a drain therein, an inlet pipe connected to said drain, a sediment tank in fluid communication with said inlet pipe, a filter tank in fluid communication with said sediment tank, a pressure tank for storing the filtered fluid, a pump for pumping said fluid from said filter tank to said pressure tank and an outlet pipe in fluid communication with said pressure tank and connected to said cuspidor for introducing the recycled fluid therein.
Claim 9
Dependent Claim
16 words
The apparatus according to claim 6 further comprising a secondary fluid filter in said outlet pipe.
Claim 10
Dependent Claim
47 words
The apparatus according to claim 6 further comprising a drain and a first and a second overflow pipe, said first overflow pipe being operably connected between said sediment tank and said drain and said second overflow tank being operably connected between said filter tank and said drain.
Claim 11
Dependent Claim
67 words
The apparatus according to claim 8 further comprising a backwash valve between said sediment tank and said filter tank and a directional valve between said pump and said filter tank such that when the direction of fluid flow from said pump is reversed, said backwash valve closed and said direction valve conditioned to permit reverse flow, said filter tank can be backwashed through said second overflow pipe.
References Cited (Backward Citations)
US2099317A
Cited
US3067433A
Cited
US3079612A
Cited
US3005993A
Cited
US3226733A
Cited
US3440669A
Cited
US3708806A
Cited
US3613131A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |