Patent US3921228A successfully refreshed from Google Patents.
US3921228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Decomposition toilet
Assignee: Individual
•
Filing: 1974-04-01
•
Granted: 1975-11-25
•
Expires: 1994-04-01
Abstract
Abstract A decomposition toilet with a casing having a downwardsrearwards sloping grid for faeces and a heating element in the casing bottom for heating urine by conduction. A thermostat for switching the heating element on and off is located immediately on top of the heating element so as to detect presence or absence of urine. An air inlet is located at the casing front below the grid and air passes over the casing bottom, through a duct inside the casing rear wall to an exhaust fan at the rear top casing portion.
Inventors
- 👤 Tommy Mikael Sundberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:04
CPC Classifications
A; A47; A47K; A47K11/00; A47K11/02; A47K11/023; Y; Y02; Y02A; Y02A50/00; Y02A50/30; Y10; Y10S; Y10S4/00; Y10S4/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
189 words
A decomposition toilet comprising a casing having an opening surrounded by a seat, said casing have a bottom wall, a rear wall and an intermediate wall spaced from said rear wall to form an air duct there between, the latter having an air intake at its lower end adjacent to and slightly spaced from the bottom wall and an air outlet at its upper end, a fan at the rear portion of the casing facing the air outlet, a grid-like bed for faeces under said opening, said grid-like bed comprising a plurality of sloping pipes having their lower ends carried by said intermediate wall, a trough positioned beneath each of said pipes and extending longitudinally thereof to catch running liquid and lead it to the rear of said casing, a mould container beneath said bed, heating means to effect decomposition of the faeces lying on said grid-like bed, so that the mould generated thereby will fall through the grid-like bed to said mould container, said heating means being arranged at the bottom of said casing in contact with the liquid collected at the bottom for heating of said liquid.
Claim 2
Dependent Claim
189 words
A decomposition toilet comprising a casing having an opening surrounded by a seat, said casing have a bottom wall, a rear wall and an intermediate wall spaced from said rear wall to form an air duct there between, the latter having an air intake at its lower end adjacent to and slightly spaced from the bottom wall and an air outlet at its upper end, a fan at the rear portion of the casing facing the air outlet, a grid-like bed for faeces under said opening, said grid-like bed comprising a plurality of sloping pipes having their lower ends carried by said intermediate wall, a trough positioned beneath each of said pipes and extending longitudinally thereof to catch running liquid and lead it to the rear of said casing, a mould container beneath said bed, heating means to effect decomposition of the faeces lying on said grid-like bed, so that the mould generated thereby will fall through the grid-like bed to said mould container, said heating means being arranged at the bottom of said casing in contact with the liquid collected at the bottom for heating of said liquid.
Claim 3
Dependent Claim
153 words
A decomposition toilet comprising a casing with an opening surrounded by a seat, a grid-like bed for faeces under said opening, a mould container beneath said bed, said casing including an air intake, a fan and an air outlet, heating means to effect decomposition of the faeces lying on the grid so that the mould generated thereby falls through the grid to the mould container, said heating means being arranged at the bottom of the casing, in contact with liquid collected at the bottom, for heating the liquid, said heating means comprising an electric resistance foil mounted on the bottom of said casing, a protecting plastic layer covering said resistance foil, a cassette mounted in direct contact with said plastic layer, a thermostat for switching the heating means on and off mounted in said cassette, said cassette having an opening accessible through the rear wall of the casing for removal of said thermostat.
Claim 4
Dependent Claim
153 words
A decomposition toilet comprising a casing with an opening surrounded by a seat, a grid-like bed for faeces under said opening, a mould container beneath said bed, said casing including an air intake, a fan and an air outlet, heating means to effect decomposition of the faeces lying on the grid so that the mould generated thereby falls through the grid to the mould container, said heating means being arranged at the bottom of the casing, in contact with liquid collected at the bottom, for heating the liquid, said heating means comprising an electric resistance foil mounted on the bottom of said casing, a protecting plastic layer covering said resistance foil, a cassette mounted in direct contact with said plastic layer, a thermostat for switching the heating means on and off mounted in said cassette, said cassette having an opening accessible through the rear wall of the casing for removal of said thermostat.
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) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |