US 4,353,315 AGranted

Step grate for mechanical stoker with flexible fire grate

AssigneeAkihiko Hiroe

InventorKatsurou Hayashi

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Abstract

A flexible, perforate grate, e.g. made of a mat of meshed metal chain links or wirecloth belting, is provided at intervals spaced across its length, with individually extensile/retractile supports. By coordinately extending and retracting the supports, the material fed onto the grate at one margin can be walked, rolled, tumbled and similarly redistributed and moved across the grate to the opposite margin, and, for instance dumped off the far edge of the grate into a residue collecting system. The grate may be basically horizontal, or it may have a general cascade-like tilt either forwards or rearwards. In one embodiment, the supports are seen each having a grate mat contact member which pivots during extension and retraction in order to further alter the shape of the grate mat intervening two adjacent supports.

Claims11

Dependent claims

A step grate mechanical stoker, comprising:

a flexible reticulate grate having an entrance margin and an exit margin, said grate being generally laid out so that material may be loaded onto the grate at the entrance margin and migrated across the grate to the exit margin;
a plurality of generally upright support structures arranged in at least one series;
said grate being draped upon said support structures so that said series is aligned with the entrance margin to exist margin dimension of said grate and said grate being constituted between adjacent twos of said support structures by a respective plurality of flexibly interconnected elements so that said grate hangs in respective cantenaries in respective intervals between pairs of neighboring said support structures in said series.
each support structure including a grate contact member, a fixed portion, and an extensible/retractible portion between the contact member and fixed portion thereof;
means for extending and retracting each extensible/retractible portion.

2 more elements

Dependencies are inferred from the claim text.