US3863578A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Incinerator stoker
Assignee: Kanadevia Corp
•
Filing: 1974-01-10
•
Granted: 1975-02-04
•
Expires: 1994-01-10
Abstract
Abstract An incinerator stoker has a stepped stationary hearth with alternate horizontal step surfaces and vertical walls or risers and has a plurality of movable hearths which are reciprocatable by suitable driving means on the horizontal step surfaces through openings in the risers of the stationary hearth. Air for combustion is forced through vents in the risers and in vertical front wall portions of the movable hearths. There is no gap in the surface of the stoker other than the movable hearths openings and the vents, all of which are in vertical surfaces. The driving means can be arranged to reciprocate the movable hearths in groups and in any sequence desired to improve the agitating action and to further reduce the possibility of material being incinerated entering or clogging the openings or vents. One stoker construction disclosed comprises cast L-shaped and inverted channel shaped step members which are mounted alternately in side-by-side relation on suitable supporting structure across the width of each step with movable hearths being positioned within the inverted channel step members and being supported for in and out movement on the L-shaped step members of the next lower step.
Inventors
- 👤 Hisamitsu Kato
- 👤 Masashi Yoshimura
- 👤 Yoshitaka Takei
- 👤 Akio Nishina
- 👤 Ryosuke Yamashita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:29
CPC Classifications
F; F23; F23L; F23L1/00; F23L1/02; F23G; F23G5/00; F23G5/002; F23H; F23H7/00; F23H7/06; F23H7/08; F23G2203/00; F23G2203/80; F23G2203/803; F23G2209/00; F23G2209/28; F23H2700/00; F23H2700/003
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
95 words
An incinerator stoker comprising a plurality of stepped stationary hearths having alternate horizontal step surfaces and vertical wall portions, openings provided in the vertical wall portions at suitable intervals widthwise of the stationary hearths, movable hearths having front end vertical portions and adapted to be moved in and out on the horizontal step surfaces through said openings, air holes provided in the front end vertical portions of said movable hearths and in the vertical wall portions of the stationary hearths between the movable hearths, and driving means for moving said movable hearths in and out.
Claim 2
Dependent Claim
95 words
An incinerator stoker comprising a plurality of stepped stationary hearths having alternate horizontal step surfaces and vertical wall portions, openings provided in the vertical wall portions at suitable intervals widthwise of the stationary hearths, movable hearths having front end vertical portions and adapted to be moved in and out on the horizontal step surfaces through said openings, air holes provided in the front end vertical portions of said movable hearths and in the vertical wall portions of the stationary hearths between the movable hearths, and driving means for moving said movable hearths in and out.
Claim 3
Dependent Claim
28 words
An incinerator stoker according to claim 1, including a vertical wall portion of greater height separating groups of vertical wall portions of lesser height in said stationary hearths.
Claim 4
Dependent Claim
42 words
An incinerator stoker according to claim 1, wherein said driving means are arranged to drive as one group the movable hearths on alternate horizontal step surfaces and to reversely drive as another group the movable hearths on the remaining horizontal step surfaces.
Claim 5
Dependent Claim
22 words
An incinerator stoker according to claim 3, wherein said driving means comprises a separate driving device for each group of movable hearths.
Claim 6
Dependent Claim
41 words
An incinerator stoker acccording to claim 1 wherein said driving means comprises bars reciprocatable underneath the stationary hearths, intermediate links connecting the bars to the rear end portions of the movable hearths and a driving device adapted to reciprocate said bars.
Claim 7
Dependent Claim
62 words
An incinerator stoker according to claim 1, wherein said driving means comprises bars reciprocatable underneath the stationary hearths, brackets extending from said bars toward the movable hearths and pins protruding from said brackets, bifurcated members extending generally downward from the rear end portions of the movable hearths, said members loosely engaging said pins, and a driving device adapted to reciprocate said bars.
Claim 8
Dependent Claim
54 words
An inciNerator stoker according to claim 1, including a plurality of air blast ducts having openings disposed below the hearths, the opening of each duct dividing the hearths into one of a plurality of sections with each section including a plurality of movable hearths, each of said ducts separately supplying air to each section.
Claim 9
Dependent Claim
23 words
An incinerator stoker according to claim 1, wherein at least one of said stationary hearths and movable hearths is constructed with porcelainous material.
Claim 10
Dependent Claim
30 words
An incinerator stoker according to claim 1, wherein the surface of the vertical wall portions of said stationary hearths comprises a metal supporting body and a refractory material fixed thereto.
Claim 11
Dependent Claim
104 words
An incinerator stoker according to claim 1, wherein said stationary hearths include L-shaped step members each comprising a ceiling plate portion and a vertical wall plate extending downward from the front end thereof, reversed channel step members each comprising a ceiling plate portions and vertical side plates extending downward from both side edges thereof; supporting means on which said step members are disposed laterally alternately to form each step; and, wherein said movable hearths are installed within said reversed channel step members and are movable in and out on the ceiling plate portions of the reversed channel step members on the next lower step.
Claim 12
Dependent Claim
72 words
An incinerator stoker according to claim 10, wherein said reversed channel step members each include recessed portions extending upwardly from the lower edges of said vertical side plates, and wherein said supporting means include pairs of attaching bases having vertical portions and pins extending from said vertical portions, said pins facing each other and adapted to be engaged by said recessed portions thereby allowing upward detachment of the reversed channel step members.
Claim 13
Dependent Claim
68 words
An incinerator stoker according to claim 10, wherein said L-shaped step members include L-shaped latching pieces facing rearwardly on the undersides thereof and the rear ends of the L-shaped step members are attached detachably by connections to said supporting means, said connections being protectively covered by the L-shaped members of the next step above, and wherein said supporting means include latching bars engageable by said L-shaped latching pieces.
Claim 14
Dependent Claim
41 words
An incinerator stoker according to claim 10 wherein said L-shaped step members each include a downwardly extending bifurcated plate located on the underside of the ceiling plate thereof and wherein said supporting means include latching bars engageable by said bifurcated plates.
Claim 15
Dependent Claim
65 words
An incinerator stoker according to claim 10, including side walls, sealing plates parallel to said side walls and refractory packing interposed between said sealing plates and said side walls, and wherein said reversed channel step members adjacent to said sealing plates include side protrusions, said sealing plates include protrusions, and refractory packing is interposed between said sealing plate protrusions and said channel step member protrusions.
Claim 16
Dependent Claim
70 words
An incinerator stoker according to claim 10 wherein said supporting means include pairs of attaching bases, each of said pairs including laterally spaced vertical portions disposed below one of said L-shaped step members and adjacent to the vertical side plates of reversed channel step members on either side of said one L-shaped step member, and connecting means for the step members carried by said vertical portions of the attaching bases.
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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |