Note: Descriptions are shown in the official language in which they were submitted.
2197168
FIELD OF THE INVENTION
This invention relates gen~lly to air filter systems and, mare particularly, to
improvements to in chamber ~idge filter systems that require p~ic reF~ nt of thecar~idge filters.
BACKGROI~D OF T~E ~NTION
One of the -lifficllltly ~nr~ r.~d with c~ ~g systerns is thaton~ ;",~ the airwithin
the system needs to be vented from tne system. As the air within the system is full of
part~ t~ it is n~F ~ to filter the air before venting tne air to the ~1 " Il~s~)hrl c;.
Typically, a ~Llidge filter is pociti~ed within the mixing or storage ~ ",~, of the
system so that the d~ty air must flow l~ugh the cartrid,ge filter before e~iting from the
system. The filter system in~hldff a cartIidge adapter that has m~ml~s thereon that engage
with ma~ng ~, ~e ~h~ ~ on the intenarofthe cartridge filter. The adapterholds the ~Lidge
filter thereto as a sillgle UDit to permit the car~idge filter to hle ~o~ed and replac~d as a
single unit when the ~ ge fil~eri~s spent. The loc~ing mf~h~nicmc for hol~ing the
car~idge adapter to the filter ~ llidge is ~I,e~el~ effe~ive and actuaUy mal~ it ~hm~.lt to
remove a filter G~rtridge ~m the cartridge adapter which ~..;n; ~ . ~;~ 5 the ch~n~S of the
c~ l-i~ge filter fa1ting ir~to the bi~ Ihus it is ve~ lt and Iare for the car~idge filter to
~dPnt~lly faIl off the car~idge filter . 1~t~Pr, however, in spite of the s~;~;l~ of the
n . . .~t sysh~ n~ny o~ ~ c~r causes the cartridge filtfr to drop into the
system Ihat is, the person who i~5 ~ .lg the car~idge filter removes the filter cartridge
filter from the car~idge adaptcr and du~i~g the h~n~tin~ proc~ss might a~i~pntly dT~p the
old ornew car~idge filterinto thebin. Wh~e the locl~ing f .~ t between the car~idge
a~ter and the car~idge filter v~a~y assures tbat a(-ridprl~t release should not occur it
hasbeendisooveredtha~theo~ tn~mightthroughin~ ;rf~ess~ P.~lydropthe
car~idge filter into the bin after he a~ she has ~ UVC d the c~llidge filter ~m the filter
a ~ Jt~ s the bins are usually quite deep it is ~1; r~ t to fish the ~i~lgp- filter out of the
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bin. In addition the bin system mi~ht contain m~rhin~ that would be dam~ved if the
car~idge f;lter fell in. While it is highly unlikey that the ada~ter wouId ever fall offthe
cartridge filter the present invention address an ~ ~l~ h~n~llinv problem that can result
in a cartridge filter falling into the bin. That is, the op~lol through ;~ nre or
in~ /eneSS might ~rri~Pn~ly drop the filter cartridge into the o~g in the bin. To
ove~ollle the problem with in;,ll.~..l;ve ~ o~ l the ~resent inver~tion provides a safety
cage that prevents the o~.d~r f~m ~ (lently dropping the ~ I,idge filter into the bin and
causiIIg damage to tne system yet permits the op~aLol to readily remove and replace the
filter cartrid,,e.
BRIEF DESCRIPlION OF T~E PRIOR ART
U.S. Patent 4,336,043 hows filtration ~Sc~mhly with a closed hn..~;ng molmt~ around a
f~ter.
U.S. Patent 4,848,9g0 shows a ~ln~t coll~ with the dust coll~tnr la ated outside of the
hopper dryer.
U.S. Patent 5,344,559 shows a filter car~idge.
U.S. Patent 5,409,512 shows an air filt~1inn system for c~l~g dust during Swc~;pil~g
0~ - ,-1 ;()n~
U.S. Patent 4,482,367 shows a self~l~niTt~ air fitter.system wl~ ,~ air Iter is ~brated
to to ~ 1~J~ tPti m~tPn~l
U.S. Patent 4,767,427 shows a c~l.;dge filter ll~o~ .lg ~ L~n a~:leasable
~1~"~1~;"~ ~I)y~.al~JS holds the fitterwithin the systesn.
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U.S. Patent 4,514,875 shows a filter for a çl~o~ning m~rhin.~ with the filter mounted
di~ly in the m~rhinP
U.S. Patent 4,198,726 shows a cl~ninp, f;lters mo~lnt~d on a trac~
U.S. Patent 2,370,034 shows a removable bin for holding ~zen foods in a refi~ge~tnr or
the like.
U.S. Patent 1,284,579 shows a jar and bottle holder.
U.S. Design Patent 138,327 shows an ~ l basket.
U.S. Patent 1,885,104 shows a basket for use in a rPfn~P~t r
Su~ MAl~y OF l~E INVE~TION
The present imrention co.. 'l" ~ s a system for p~ g a car~idge filter which is located
inside the bin or hopp~ of a sysb~m f~m ~ri~lpnt~lly faning intD the hopper b~ of
f~ilure of the ~, ~n. to p~ y handle the car~idge filter ~nnn~ f ~ I of the
idge filter with the system inr~ ling a safety cage that is secured to the bin with the
safety cage a~o....~ the cartcidge filter and being spaced ~ l ly far from the
c~rtridge filter to permit free nonhin~ling removal and ~ nl of a ~ter car~idge w~ile
still p~iUing ~b~ lly lmilTl~d~P~d flow of air ~rou~ the safety cage.
BR~EF DESCRIPIION OF TEIE DRAW~GS
Flgure 1 shows a partial alt away view of a co~ y~g systems ha~ing a bin with a f;lter
located inte~al to the bin for ~Enting air tO the outside of the bin;
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Figure 2 shows a cartridge filter for use in the filter system of Flg,ure l;
Flgurc 3 shows a cartridge f~ter of Flgure 2 in sec~ed ~~ng~oc- "Pnt to a car~dge filter
ada~ter,
Figure 4 shows the safety cage located inside the bin of the conveying system of Figu}e l;
and
Flgure S shows the safety cage po~ oned a~und the car~idge filter to prevent a cartridge
filter ~om ever fàlling into the bin.
DESCR~IION OF 1~: PREFE~R~ E~IBODIM~T
Flgure 1 shows a par~al cut away view of a collvc~mg system 10 having a bin 12 with a
filter 20 located int~n~l to the bin 12 forventing air to the outside of the bin 12. Bin 12 sits
on the floor ~Uy~uL Lcd by le~s 13 and in~ des sidewalls and a t~ . . .~ 15. A disol~ge
tube 16 cQnnf~l~ to top .. ~h~ 15 to convey m~t~l to or f~om bin 12. Bin 12 inC~ es a
mi~ing ....~ m 18 for mi~ng the m~t~l 16 in bin 12.
.
~~ o~,- ~ of bin system 10, air from inside rçgion 17 flows ll~uu~h filter 20 and is
to the ~ as ..,~ by the a~Tows. Ihe filter remo~es particulate
ma~er fi~m the air to avoid p nnting the air outside bin 12.
hgure 2 show-s a p~. .~-l; ,~ view of a typical filter cartridge for use in the ~esent system
the ~ t i~ in~ s a f~st rigid end cap 21 having a cent~ . . .h ~ 23 with a set of
~ a apaced ~ ...fi ~ ly an~und ce~lt~l ~ 23. A second end
cap 22 is loca~ed on the OppOal~ end of filter 20 and is secured to one end of filter media
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25. Simil~rly end cap 21 is secured to the opposite end of filter media 25 to provide a filter
car~idge. End cap 21 &ffers ~om end cap ~ in that end cap ~ is closed so that air can
only enter the interior of filter 20 thn~ugh the filter media 25.
Flgure 3 shows a caltridge filter adapter 30 havis~g a set of c~idge engagement ~ b~
34 located on the cylin~ sechon 33 of f~ter adapter. A tube 30a ~ rl~-~c to filter adapter
30 to permit a user to p~io~fi~lly pulse air bac~wa~d l~ filtes cart~idge 20 to ~ loclge
particulate m:~Pri~l that lodges on the filter me&a 25.
Cylin~nr~l section 33 fits ~vithin the central "~ "h~ 21 in rigid end cap 21 so that the Bdi
e~tPn~li~ e ~y~ lt ~ l "~ 34 engage the radial eng,~.... n~ ..-~...l). S 24 on Bdial
filter 2Q To secure the adapter 30 to filter c~dge 20 one rotates or t~rists filter cartcidge
20 slightly unhl the ~ .l ."_~ "~ ~ loc3~ lugell~ .r ill the form of ~Dikc
,e- 1 1~ Once in P.l~ . . .~. .f with each ot~er the ~n~m~nt lL~e.~ securely hold
~e a~ and the filter as a single unit.
F~gure 4 -shows a t~ CJUub~l c~dge case 40 having a lip 41 far ~,u~ ially
~r~g~; ~ ~ a flange 43 to ~:vent "~ case 40 fiom fi~lling into bin 12.
Flange 43 can be sealred to top ~ ..h~ r 15 thl'ough a wel~m~t or ~ o-lgh bolts orrivets.
The c~idge case in~ es bottom section 45 and a side section 46. Car~idge case 40 has
an inside ~ Dl and an inside leng~h Ll with the car~idge case 40 ~tPn~i~ inside of
bin 12. Car~idge case 40 in~7ll~1Pc a plulality of ~,;il.~UUl~;lGU~ riDgs ar bands 47 and a
plu~aliy of 1~ -..al wire ... ..1. - ~46 thatare ~d to each other to fo~m awire
safety G~ge 40 to su~ound a c~idge filter. The o~...-pc in the w~re safety cage 40 are
ge so as not to impede ~ ~ict t~e flow of air l~. . u! ~E l - the fil~:r. If thesafety G~ge is to be uced in a co~ c~l.ul~ll..,n~ the wire safety Glge c~n be made ~m
s~inlP~c steel, hc,~ ~, other cage mqt~riqlc couId be used d~nrl;ng on the e lV~ llllGUt,
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in the bin. In the embodiment shown the wire safety cage is vertically mounted in bin 12,
that is with the lon~it~ in~l mem~er.s e~t~on~ling along orparallel to a vertical line.
hgure 3 i~ t~tPS cylin~ l ~idge filter 20 having an outside ~met~ D2 and an
outside length L2 with the outside ~ti~mPt~ s~r~ ly srnaller than the inside ~ m~t~ D
of cylin~lTi~l car~idge c~ 40 ~nd the outside length L2 of cartridge filter 20 being
sllffi~i~ntly smaller than the inside length Ll of cylin~ic~ idge 20 so as to permit free
non binding ins~L~ or removal of car~idge filter 20 f~m cylin~ri~l car~idge case 40
while allowing the cylin~n~t cartridge case to prevent the car~idge filter 20 from
~c~ ntly falling into bin 12 in the event the car~idge filter adapter 30 is ~ ng~ged from
~idge filter 20 d~ing the ch~ncing of the cartndge filter 20 in the bin system 10.
hgure 5 shows the filter 20 and filter adapter 30 located in safety cage 40 with the safety
cage spaced f~m the sides and end wall of filter cartridge 20. In this cnn~titinn the filter 20
cannot fall into bin 12; hu.._~_., more ih ~lly ~hen an op ~ ,. le~?laces the filter
car~idge the safety cage 40 remains within bin 12 so that if the op~v~ should ~l~rir~ontly
dr~p the filter ~idge itcouldnot fall into thebin and .1~ r the c~lu,p~l in thebin.
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