Patent US3732579A successfully refreshed from Google Patents.
US3732579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum water-closet
Assignee: GUSTABSBERGS FAB AB
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Filing: 1971-06-22
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Granted: 1973-05-15
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Expires: 1991-06-22
Abstract
Abstract A vacuum water-closet, wherein a buffer receptacle is connected to a flush-water feed pipe between an inlet valve and a flushing nozzle, said buffer receptacle delivering a predetermined quantity of water to the water-closet after each closing of said inlet valve.
Inventors
- 👤 C Allander
- 👤 L Bengtsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:28
CPC Classifications
E; E03; E03F; E03F1/00; E03F1/006; E03D; E03D5/00; E03D5/02; E03D5/09
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
134 words
A vacuum water-closet comprising a bowl having a bottom discharge opening, a vacuum discHarge pipe connected to said discharge opening by way of a discharge valve, nozzle means for introducing flush-water into said bowl, a second pipe for feeding the flush-water to said nozzle means by way of an inlet valve, the latter having an outlet, a timed re-setting mechanism associated with means for operating said inlet valve and said discharge valve in mutual relationship under the influence of said re-setting mechanism, and a buffer receptacle, wherein said operating means close said valves substantially simultaneously, and said buffer receptacle is connected to said second pipe, said buffer receptacle being filled up with the flush-water during each flushing period for delivering a predetermined quantity thereof to said nozzle means after each closing of said valves.
Claim 2
Dependent Claim
134 words
A vacuum water-closet comprising a bowl having a bottom discharge opening, a vacuum discHarge pipe connected to said discharge opening by way of a discharge valve, nozzle means for introducing flush-water into said bowl, a second pipe for feeding the flush-water to said nozzle means by way of an inlet valve, the latter having an outlet, a timed re-setting mechanism associated with means for operating said inlet valve and said discharge valve in mutual relationship under the influence of said re-setting mechanism, and a buffer receptacle, wherein said operating means close said valves substantially simultaneously, and said buffer receptacle is connected to said second pipe, said buffer receptacle being filled up with the flush-water during each flushing period for delivering a predetermined quantity thereof to said nozzle means after each closing of said valves.
Claim 3
Dependent Claim
30 words
The vacuum water-closet as defined in claim 1, further comprising a pressure-operated control mechanism for said discharge valve, said outlet of the inlet valve being connected to said control mechanism.
Claim 4
Dependent Claim
56 words
The vacuum water-closet as defined in claim 2, further comprising a cylinder with a chamber which constitutes said buffer receptacle, and wherein said control mechanism includes a plunger movable in said chamber against the action of a return spring, said plunger being returned along a portion of said chamber after the closing of said discharge valve.
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) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |