Document e7aynjOJJ2arewGyQZjpnZw7G

United States Patent nw Mitchell mi 3,877,900 [45] Apr. 15, 1975 [54] DOST COLLECTOR [75] Inventor; Wallace F. Mitchell, Libertyville. III. [73] Assignee: Ammco Tools, Inc., North Chicago, III. [22] Filed: Dec. 10, 1973 [21] Appl. No-: 423,413 [52] [SI] [58] O.S. Cl......................... 35/366; 55/374; 55/385; 55/429; 55/503; 55/507 Int. Cl................................................ BOld 46/02 Field of Search........ 55/366. 377, 429, DIG, 2, 55/DIG. 3. 364, 374, 428, 467, 471-473, 502, 503, 505, 507, 310, 311, 385; 229/62 3,343,344 3,480.198 3,621,641 3,653.190 3,664,575 3,716,182 3,774,838 9/1967 11/1969 11/1971 4/1972 5/1972 2/1973 11/1973 FairaizJ ct al____.............55/429 X Repko................ ............. 229/62 X Takei ct al....................... 55/366 X Lee et al...... ..... ........ 55/DIG. 3 Lake................. ................ 229/62 Korn........ ......... Christie..... *........ ................ 229/62 FOREIGN PATENTS OR APPLICATIONS 879,781 934,293 1,359,227 10/1961 8/1963 3/1963 United Kingdom............. 55/DIO. 2 United Kingdom.. ...........55/DIO. 3 France............... Primary Examiner--Frank W. Lutter Assistant Examiner--Kathleen J. Prunner Attorney, Agent, or Firm--Edmond T. Palnaude [56] 957.130 1,078,651 1,786.756 2,222,077 2,594,281 2,943,698 3,088,260 3,208,202 3,320,725 References Cited UNITED STATES PATENTS 5/1910 11/1913 12/1930 11/1940 4/1952 7/1960 7/1963 9/1965 5/1967 Wear............................ ... 55/473 X Winans................. ..... 55/311 Juelson.......... . ... 55/472 X Kahn..................... ............... 55/366 Berg..................... ..... 55/374 Bishop.......-........ . 55/DIG. 3 Seyfried................. ..... 55/374 Herubel............... .. 55/429 X Foster.................... .. 55/366 X [57] ABSTRACT A dust collector into which dust laden air is blown under pressure includes an aiT pervious dust bag seal ably mounted over an impervious, disposable bag into which the dust from the bag falls by gravity each time the blower is stopped. The bag is contained in a perfo rated, bucket-like housing scatably connected over the open bottom of the dust bag. 1 Claim, 4 Drawing Figures 15 13 ... exhibit .17 18 im 4-d-y-d-S /4-fctV 12 1 t' ! Ii \\ /,* .i 30 32 ^9} -28 33- zr PATENTEDJffll 5 H7S 3.677,900 EB. 2 3,877,900 1 dust collector The present invention generally relates to apparatus for separating dust particles from air. and it relates to tion between the two bags is opened, the plastic bag is sealably tied off by Integral ties thereon, and a fresh bag . is sealably connected to the bottom of the dust bag. It a new and improved dust collector including a sealable, will be apparent that operation of the blower in the ab disposable bag in which the dust is collected and dis sence of the disposable bug will spew dust directly onto carded. This invention is an improvement of the dust the floor whereupon the operator will promptly shut collector disclosed in my copending application Ser. down the system and attach a plastic collector bag No. 340.324. filed Mar. 12, 1973 and assigned to the thereto. same assignee as is the present invention. BACKGROUND OF THE INVENTION 10 BRIEF DESCRIPTION OF THE DRAWINGS Further objects and advantages and a better under Dust generated by grinders and other material re standing of the present invention can be had by refer moval machinery is a potential huzuid to the machinery ence to the following detailed description, wherein. operators and other persons in the same general loca FIG. 1 is an exploded perspective view of a dust col tion. In the past this dust has been collected with vac- 13 lector embodying the present invention in combination uum cleaners which pull or suck the dust laden uir from with a brake shoe grinder. the immediate area in which it is produced and force FIGS. 2u, 2b and 2c show the steps followed when it into the ambient atmosphere through an air pervious sealing off the dust collector bag of the present inven filter bag which functions both as a filler and as a dust tion. collector. A serious problem with this prior art type of 20 dust collector is that when the bud becomes filled with DETAILED DESCRIPTION OF THE INVENTION dust and/or the pores thereof become clogged with the Referring to the drawing, a dust collector 10 includes dust particles, there is insufficient section to remove an inlet duct 11 which Is sealably connected to the ex the dust being produced and tile motor of the dust col haust part 12 of a brake shoe grinder 13. The grinder lector becomes overloaded. Moreover, the dost parti 25 13 is of the type described in US. Pat. No. 3.234,693 cles are blown into the atmosphere. In fact, because of and includes an electric motor 14 which drives a grind the inherent danger to the persons using this type of ing wheel (not visible in the drawing) located in a hood equipment, there are many localities which have 15 for resurfacing the arcuate abrasive surface 16 of burned the use of brake shoe grinding machinery the brake shoe clumped in the grinder. An impeller which incorporates that prior art type of dust collector. 39 (not shown) is located within the hollow base 17 of the Another problem associated with the prior art type of grinder to draw air and any particles entrained therein dust collector is that of disposing of the collected dust through the hood 15 und into the hollow base from purticles without-permitting at least some of the dust to which the uir exits under pressure through the exhaust escape into the atmosphere. A partial answer to the outlet 12. A resilient sealing ring 18 b disposed be problem has been the use of disposable liner bags re 35 tween the exhaust port 12 and the duct 11. and a spring movably mounted within the main bag. However, this clip 19 holds the duct II firmly within the port 12 in has not proven to entirety eliminate the problem. sealing engagement therewirh. More particularly, the OBJECTS OF THE INVENTION U-shaped upper portion 19a of the clip fits over a headed stud 20 and the lower ends 19b snap under the Therefore, a principal object of the present invention 40 base of the grinder 13. is to provide a new and improved dust collector. A generally cylindrical, cloth dust bag 22 has an inlet Another object of the present invention is to provide sleeve 23 which fits ovet the depending end of the dust a dust collector employing a disposable plastic bag in 11. The lower end of the dust bag 22 is open and is which the dust particles are collected, which bag may fixedly and sealably connected at its periphery to a re be quickly and easily sealed and removed from the col 4S silient sealing ring 25 which provides an external annu lector for discarding and replacement. lar flange at the bottom end of the bag. Still another object of this invention is to provide a A cylindrical pail or bucket 27 has an internal diame dust collector adapted for use with brake shoe grinders ter intermediate the internal and externa) diameters Of and which meets the Federal Clean Air Standards. the ring 25. In use, a flexible plastic bag 28 is placed in A further object of this invention is to provide a new 50 the pail 27 with the upper sides of the bag overhanging and improved disposable bag having Integral ties for the rim of the pail as shown in FIG. 1. The pail is then tying off the bag, lifted to sealably engage the ring 25 which is held in a downwardly opening annular groove in a ring 29, and SUMMARY OF THE INVENTION the pail then is held in the sealed elevated position by Briefly, the above and further objects may be realized 55 a pair of toggle latch members 30. The latch members in accordance with the present invention by providing 30 and the ring 29 are carried by a U-shaped, rigid a dust bag having a large open mouth at the bottom and guard member 31 which is mounted to a bench 32 on connectable at ihe top to the outlet of a blower posi which the grinder 13 is mounted. The ring 29 and the tioned to pull the dust faden air from the immediutc area in which It is produced and blow it under pressure 60 latch members 30 are secured by suitable means to the guard member. The latch members 30 tockingly engage into the bag, and an air Impervious plastic bug sealed a corresponding pair of clips 33 riveted to the sides of over the open bottom of the dust bag. With the blower the pail 27 whereby ,the collector bag 28 is sealed over operating, the dust particles are collected on the Inner the bottom end of the dust bag 22. A plurality of open- surface of the dust bag and each time the blower is ings 34 are provided in the bottom of the pail 27 to re stopped the dust bag partially collapses and the dust lieve the pressure between the bag 28 and the paH and particles deposited therein fall into the plastic bag. Pe to permit dust to exit the system if a bag is not located riodically, and before the plastic bag is full, the conrec in the collector. 34 Referring now to FIG. 2, the bug 28 is slit circumfer entially at 36 through about 180 near the top to pro vide an integral, elongated strip portion 37 which may be cut in two and used for trying off and sealing the types of grinders. Therefore, it is intended by the ap pended claims to cover ail such changes and modifica tions which come within the true spirit and scope of this invention. dust Tilled bag. In use. the upper portion of the bag 28 5 What I claim is: is folded outwardly and downwardly a few inches to the 1. A dust collector for use with a grinding machine position shown in FIG. 2b. The upper portion of the bag having an exhaust port through which dust laden air is is then carefully gathered together to assure against the emitted under pressure, the combination comprising, dust from the bag being released into the atmosphere, an air pervious dust bag having an inlet sleeve near and the strip 37 is cut or tom into two sections which 10 the top and an open bottom, ore tightly wrapped once or twice around the gathered meuns for seaiably connecting said sleeve to said ex portion of the bag and tied together as shown in FIG. haust port. 2c. The sealed bag can then be safely discarded. a resilient sealing ring fixedly connected to said bag The dust collector of the present invention thus pro . and providing an external flange at the bottom end vides a system which provides excellent dust removal 15 of said bag. characteristics, is easy to use. and is readily adaptable a rigid guard member adupted to be mounted in fixed to existing machines. The guard 31.prevents accidental touching of the fubric bag 22 which could result in the relationship with said grinding machine and sur rounding said dust bag, escape of dust through the bag. and the pail 27 prevents a ring having a downwardly opening annular groove accidental damage to the bug 28. Moreover, the pail 20 simplifies handling of the dust Tilled bag 28 during the bag replacement operation. The integral tie strips on the bag 28 are not only, a convenience but assure that the bags will be tied before being discorded. While the present invention has been described in 25 connection with particular embodiments thereof, it will be understood by those skilled in the art that many changes and modifications may be made without de parting from the true spirit and scope.of the present in vention. For example, the illustrated device is for use 30 with brake shoe grinders but the principles of the in vention have other uses as. for example, with other carried by said guard member near the bottom thereof, . said resilient sealing ring being held in said annular groove an open top perforate container, an imperforate flexible bag disposed in said container with the rim portion of said bag overhanging the rim of said container, and latch means securing said container to said guard with an unnu lar portion of said bag compressed be tween the rim of said container and said resilient ring. * * * *