US 4,225,033 A · Dustproof chute for particulate material loader

Abstract

A dustproof chute for a particulate material loader including an airtight elastic tubular member located below a particulate material feeding device and defining by its wall a space below the particulate material feeding device, a discharge end tubular member of small length connected to a lower end of the airtight elastic tubular member, a particulate material stream diameter controlling tubular member located in a space within an upper end portion of the airtight elastic tubular member and permitting a particulate material fed by the particulate material feeding device to flow downwardly therethrough in a stream, and a ventilating space surrounding the particulate material stream diameter controlling tubular member and communicating with the particulate material feeding device. The particulate material stream diameter controlling tubular member has the function of reducing the diameter of a downwardly flowing stream of particulate material and causing the stream to flow substantially through the central portion of the space within the airtight elastic tubular member whereby an inner tube hitherto used in a chute of the prior art can be eliminated. The discharge end tubular member has the function of temporarily holding the downwardly flowing particulate material before it is released from the chute.

Claims6

Dependent claims

In a particulate material loader adapted with a material feeding device:

a dustproof chute comprising:
(a) an air-tight, elastic tubular member;
(b) a discharge end tubular member connected to a lower end of said air-tight, plastic tubular member with said discharge end tubular member comprising a shock absorber tubular member, a deflecting member, and an inner tube;
(c) a particulate material stream diameter controlling tubular member located within said elastic tubular member adapted to communicate with said feeding device;
wherein:
said shock absorbing tubular member is adapted to receive a downward flow of particulate materials,
said deflecting member is adapted to cross a downward flow path of said particulate materials, and
said inner tube is arranged inside said discharge end tubular member so as to define a passage which cooperates with a fan;
whereby:
a downward flow of particulate material would avoid contact with said air-tight, elastic tubular member and temporarily stay in said discharge end tubular member, and
the powdery dust which floats above the deposited particulate material would be drawn into said discharge end tubular member through said passage defining inner tube by said fan.

8 more elements

Dependencies are inferred from the claim text.

Dustproof chute for particulate material loader

Life of this patent

Dustproof chute for particulate material loader

Life of this patent

Abstract

Claims6