US3939783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace for incinerating waste materials
Assignee: PEXIMAC BV
•
Filing: 1974-09-23
•
Granted: 1976-02-24
•
Expires: 1994-09-23
Abstract
Abstract Technical sector: Incinerator unit of average capacity having a rotary grate for household refuse and industrial waste. Main technical characteristic of the invention: The incinerator is formed of a stationary casing and a metallic rotary grate of frusto-conical configuration made of juxtaposed cylindrical rings of decreasing diameters, formed of plane or curved members which may be modular plates identical for the entire grate. The incinerator has a pre-drying chamber. The ash pit serves as a basis for the entire unit. Main applications of the invention: Basic members of mobile, removable or stationary incinerator units and of incinerator plants for household refuse and industrial waste.
Inventors
- 👤 Michel Georges Jean Picard du Chambon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:11
CPC Classifications
F; F23; F23G; F23G5/00; F23G5/20; F23G5/22; F23G5/40; F23G2203/00; F23G2203/20; F23G2203/207; F23G2203/60; F23G2203/601; F23G2207/00; F23G2207/40; F23G2900/00; F23G2900/52003
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
70 words
A furnace for incinerating waste materials which comprises: a stationary casing; a frusto-conically shaped grate mounted for rotational movement within said casing; said grate formed by a plurality of cylindrically-shaped, juxtaposed rings, said rings having radially and outwardly extending face members including orifice means for joining adjacent face members for expansion by pins, each ring member being formed of a plurality of overlapping subsections; and means for rotating said grate.
Claim 2
Dependent Claim
70 words
A furnace for incinerating waste materials which comprises: a stationary casing; a frusto-conically shaped grate mounted for rotational movement within said casing; said grate formed by a plurality of cylindrically-shaped, juxtaposed rings, said rings having radially and outwardly extending face members including orifice means for joining adjacent face members for expansion by pins, each ring member being formed of a plurality of overlapping subsections; and means for rotating said grate.
Claim 3
Dependent Claim
32 words
The furnace according to claim 1 characterized in that there are provided rotating joints at each end of the grate so as to ensure its tightness with respect to the stationary casing.
Claim 4
Dependent Claim
62 words
The furnace according to claim 1 characterized in that oxygen and liquefied petroleum gas injections can be automatically effected by means of a known per se temperature control system in case of insufficient temperature to add their effect to that of the main fuel burners; the pressure thereof can be decreased by the same regulator device in case of excess of temperature.
Claim 5
Dependent Claim
22 words
The furnace as defined in claim 1 including a cylindrically-shaped member mounted to said grate proximate to junctures of radially-extending face members.
Claim 6
Dependent Claim
14 words
The furnace as defined in claim 1 wherein said subsections are of like sizes.
Claim 7
Dependent Claim
55 words
An incinerator unit including the furnace as defined in claim 1 and additionally comprising an external casing which envelopes said stationary casing, said external casing provided with a predrying chamber means disposed upstream of the entrance to said furnace for predrying said waste materials to be treated with hot flue gases withdrawn from said furnace.
Claim 8
Dependent Claim
32 words
The incinerator unit as defined in claim 6 and additionally comprising post combustion zone means for receiving said hot flue gas, said zone means including burner means for maintaining operational temperatures therein.
Claim 9
Dependent Claim
68 words
The incinerator unit as defined in claim 6 and additionally comprising an ash pit means disposed between said furnace and said external casing to receive hot ashes, one end of said ash pit being disposed beneath a water reservoir to permit selective discharge of water from said reservoir into said pit to extinguish said ashes and to transport said ashes to a discharge zone of said incinerator unit.
Claim 10
Dependent Claim
30 words
The incinerator unit as defined in claim 8 wherein said incinerator includes a flue gas purification system including a flue gas fan means for discharging flue gas from said incinerator.
Claim 11
Dependent Claim
27 words
The incinerator unit as defined in claim 9 wherein a register is provided in said flue gas purification system to permit recycle of flue gas during start-up.
References Cited (Backward Citations)
US2127328A
Cited
US2915877A
Cited
US2985120A
Cited
US3050868A
Cited
US3408969A
Cited
US3682117A
Cited
US3631824A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-02-23 | 1979-08-25 | 1980-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-23 | 1983-08-25 | 1984-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-23 | 1987-08-25 | 1988-02-24 | $7700.00 | Window Closed / Lapsed |