Quickly and safely maintained sand-filtering device

Details Quickly and safely maintained sand-filtering device Quickly and safely maintained sand-filtering device

2001-10-08

2004-11-16

Rose, Robert A. (Department: 3723)

Abrading

Machine

Sandblast

C451S089000

Reexamination Certificate

active

06817930

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates in general to a quickly and safely maintained sand-filtering device.
2. Description of the Related Art
Referring to
FIG. 1
, a conventional sand-filtering device
2
for a sandblaster has a housing provided with an air intake
10
and an air outlet
12
. The air intake
10
is connected to a sandblast machine
1
. In the housing are provided a top plate
21
, a bottom plate
22
, a plurality of springs
23
and filtering sleeves
24
. The top plate
21
and the bottom plate
22
are spaced apart to form a space
14
, in which the filtering sleeves
24
are disposed. The filtering sleeves
24
are flexible and contain the springs
23
. The spring
23
have hooks at their ends to hang the filtering sleeves
24
on the top plate
21
. Further referring to
FIG. 2
, the bottom plate
22
is provided with a plurality of hollow cylinders
221
. The bottom ends of the filtering sleeves
24
are tied to the hollow cylinders
221
via laces.
The sand-filtering device
2
is arranged at the tail of the sandblast machine
1
to receive the used sands during the blasting process. The used sands enter the chamber
20
of the sand-filtering device
2
. The air pump
27
pumps air in the sand-filtering device
2
out to carry the used sands upward so that the used sands adhere to the inner walls of the filtering sleeves
24
. When the blasting process is finished, the air pump
27
stops. An oscillator
25
starts to horizontally swing the top plate
21
and then swing the springs
23
. The springs
23
repeatedly hit the flexible filtering sleeves
24
from side to side so that the sands on the inner walls of the filtering sleeves
24
fall. A collecting bag
3
is provided under the filtering sleeves
24
to collect the sands.
However, repeated hits cannot separate all the sands from the filtering sleeves
24
. A part of sands still adhere to the inner walls of the filtering sleeves
24
. After months, sands accumulate so that the filtering sleeves
24
fail and need to be replaced with new ones. The top plate
21
and the bottom plate
22
are made of metal and permanently fixed in the sand-filtering device
2
. Therefore, the top and bottom plates
21
,
22
are not replaced. The life span of the filtering sleeve
24
depends on the amount of the used sand. A large amount of sands results in frequent replacement of filtering sleeves.
The filtering sleeve
24
is replaced in accordance with the following manner: The lace
26
is loosened and taken away from the filtering sleeve
24
. Then, the filtering sleeve
24
is lifted to separate the hook of the spring
23
from the top plate
21
. Then, the whole filtering sleeve
24
is thrown away. When the lace
26
is detached from the filtering sleeve
24
, a large quantity of sands falls out and floats in the air. The fall-out sands are harmful to worker's health and the environment.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a sand-filtering device of quick and safe maintenance for a sandblaster that solves the above-mentioned problems.
The sand-filtering device of the present invention includes a housing, a supporting plate, at least one filtering sleeve, a division module and an air pump. The housing is connected to the sandblast machine to receive the sands. The supporting plate is detachably mounted in the housing. The filtering sleeve is hung on the supporting plate. The division module is detachably mounted in the housing. The division module has at least one passage connected to the filtering sleeve. The air pump pumps the sands through the passage into the filtering sleeve so that the sands are filtered by the filtering sleeve. To replace the filtering sleeve, the supporting plate and the division module are detached from the housing and directly thrown away together with the filtering sleeve. That is fast, efficient and safe.


REFERENCES:
patent: 686200 (1930-07-01), None

Affiliated with

Also associated with

Rating

Quickly and safely maintained sand-filtering device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Quickly and safely maintained sand-filtering device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quickly and safely maintained sand-filtering device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3336368