US 2661078 A
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Dec. 1, 1953 Filed Sept. l, 1951 J. E. VANCE SUCTION CLEANER 2 Sheets-Sheet l INVENTOR. JOHN E. .VANCE Dec. 1, 1953 J. E. vANcE 2,661,078
SUCTION CLEANER Filed Sept. 1, 1951 2 Sheets-Sheet 2 FIG. 2
INVENTOR: JOH N E. VA NC E Patented Dec. l, 1953 sUcTToN CLEANER John E. Vance, North Canton, Ohio, assigner to The Hoover Company, North Canton, Ohio, a
corporation of Ohio Application September 1, 1951, Serial No. 244,770
1o claims. (ci. 1834-51) The invention relates to suction cleaners and more particularly to a simplified and improved mode of mounting the dirt filter therein.
This invention has particular utility with tank type cleaners employing inexpensive disposable filters and to a novel and improved clamping construction for holding such a filter in place in the cleaner. One of the simplest and least expensive type of disposable filter is a tubular receptacle having one end closed. The clamping of the open end of such a filter to the cleaner casing has been a troublesome problem for which better solutions are desired.
The present invention has been found highly satisfactory in fulfilling this need. The structure of the lter bag and the clamping means therefor is simple, easy to operate, positive and adapted for use with paper or cloth filters alone, or both in combination, with equal facility.
Accordingly, it is an object of this invention to provide a new and improved suction cleaner.
Another object is the provision of a simplified lter clamp for use with either a cloth or a paper filter alone, or in combination with one another, in a suction cleaner.
Still another object is the provision of a filter clamp operating in conjunction with the access closure of a suction cleaner, and more particularly a clamp which functions to seal against the filter or to release the saine as the closure is position of parts of the clamp as the same is being closed according to one mode of operation.
Figure 3 is an enlarged detail of the edge of the lter and clamping ring.
The invention may be incorporated in a suction cleaner having an outer cylindrical casing IIJ supported upon a pair of runners I I to facilitate its movement over the floor. A motor-fan unit generally indicated at I2 is supported within the rear end of the casing in any convenient manner. The supports for one end are shown -as comprising a ring I3 carrying a resilient rubber supporting ring I4 in which multiple stage fan chamber I E is cradled. An electric motor I6 is rigidly joined to the fan chamber and its shaft extends into the fan chamber and supports the fan therein. The fan inlet I7 opens through the forward end of the fan casing and is protected against the entrance of foreign bodies by a screen I8. The rear end of the casing is closed by a removable end cap I9 which is provided with an axial outlet opening in the l end thereof.
A carrying handle 2l is attached to the top of the cleaner casing at a point overlying the center of gravity of the cleaner and serves as a mounting for the motor control switch 22.
Within the open forward end of casing I0 is a lter mounting ring 23 which is provided with frusto-conical lter seating member 24. Ring member 23 may be secured to the casing I0 by rivets, screws, welding or the like. The outer larger end of this member is provided with an annular channel 25 Within which the resilient end ring 26 of a cloth filter bag 21 may be supported. Thisbag has a tubular body and a flat bottom 28 whichv normally rest against a pair of guard wires 29 spaced slightly forwardly of screen I8.
'Ihe combined end cap and lter clamping means comprise an end closure member generally indicated at 30. As illustrated, this end cap comprises a pair of spaced sheet metal walls 3l and 32 secured together at their periphery and supporting a tubular air inlet socket 33 for a :exible hose extending through the end cap and into the lter chamber. The inner wall 32 of the closure cap has an inwardly depressed portion 34 having frusto-conical wall 35 spaced inwardly Afrom and opposite to the frusto-conical filter i seating member 24 to provide room for a resilient filter seating and clamping ring 36. The
l outer surface 31 of the clamping ring has a normal unstressed circumference substantially identical with or slightly less than that of frustoconical member 24.
The-filter clamping ring 36 and end cap 30 are lconnected to one side of casing I0 by a pair of hinges 38 and 39 having a common pivot 48. A
stop member Il! may be secured to the exterior of the casing in position to act as a stop limiting the rearward opening movement of the closure,
` as illustrated in Figure 2.
Ring 36 is provided with a tab l2 on the side thereof opposite hinge 38 which is slotted or provided with an opening 43 resistingly to receive a keeper pin 44 carried by the inner wall of the closure member. When the closure is in closed position, pin 44 projects through the opening i3 as illustrated in Figure l. When the closure is pivoted to open position, pin 44 constrains clamping ring 35 to pivot with the closure. However, if the operator wishes to pivot the clamping ring independently of the closure she may do so by disengaging tab 42 from keeper pin M.
The end cap may be locked in closed position by any suitable means such as the conventional toggle clamp 45.
The paper filter contemplated for use with this cleaner construction comprises merely a tubular paper bag 46 having its inner end closed in any convenient manner and terminating` adjacent wire guard members 29. Its open outer inlet end terminates near the outer end. of the seating ring 24 and its circumference is approximately the same as that of the ring.
Operation While Figure 1 has been described as including both the cloth and paper filter bags, it is to be understood that the cleaner can be operated with either a cloth or a paper filter alone, or with these two filters nested together, asv illustrated. The preferred operation, however, is with the paper iilter alone or in combination with the cloth filter.
In describing the mode of operation, reference will be had to Figure 2 showing the cleaner in an upright position on the rear end cap I9. Toggle clamp dii is released and the end cap 3G is pivoted to its fully open position against stop 4t. To assemble a new paper lter the operator inserts the closed end of a new paper bag into the cloth filter until its lower end comes to rest on the bottom of the cloth filter. The operator then takes the precaution of noting whether the inlet end of the paper bag is fully open so that its inlet rim lies closely adjacent the walls of seating ring 24.. While this operation is taking place, resilient clamping ring 36 remains seated over keeper pin 44'. The next operation is to disengage thev clamping ring from the keeper pin so that it may be pivoted independently of the end cap. As the clamping ring is swung downwardly, it will be clearr that the hinged side will enter the filter inlet rst and will then progressively expand the filter bag against the seating ring as it is swung to its fully closed position. Ifv there. is any tendency for the clamping ring to push the bag downwardly into the cleaner at any point or for the filter bag to become misplaced as the ring is closed, this fact becomes immediately apparent to the operator since both the top outer edge of the iilter and the vertical side walls thereof are visible from the top and lower edges of the clamping ring through its central opening lter does become misplaced in the clamping operation the operator is apprised of this condition immediately and can take the necessary corrective steps. The only remaining step is to close the end cap and to latch the toggle clamp in place. As the end cap pivots to closed position, the frusto-conical section 55 of the inner cover wall enters the central opening in the clamping ring and applies additional radial pressure on the clamping ring which tends to maintain even a tighter sealing joint between the outer walls of the clamping ring and the lter neck.
The suction hose and cleaning tools are then connected to coupling 33 and switch 22 for the motor-fan uni-t is closed. The dirty air stream IhusL if by any chance, the.
enters the filter bag and passes through the walls thereoi` on its way to fan inlet Il. The air is discharged over the driving motor and outwardly through the opening in the center of end cap l 9. At the end of the cleaning operation, the cleaner is again upended onto rear end cap I9 and the front end cap is released by opening toggle clamp 45. As the end cap is swung to open position, clamping ring S5 is carried therewith by the reason of engagement of keeper pin 4d in opening le of the clamping ring. Thus, mere opening of the end cap completely releases both the paper lter bag and the cloth filter so that either or both may be withdrawn vertically from the cleaner casing. rIhe dirt filled paper l'ter is then carried to a point of dirt disposal and a new bag is placed in the cleaner in the simple and expeditious manner described above.
If the operator does not have a replacement paper filter, the cleaner may be used with the cloth lter. No special operation is required except that it is unnecessary to close the rubber clamping ring separately from the end cap since the reenforoing ring 25 on the cloth filter serves to hold it in place while the end cap is being pivoted to closed position. Hence, the operator merely closes the clamping ring and the end cap simultaneously and latches the same in place by toggle clamp 45.
It is equally as feasible to employ the cleaner with a paper iilter alone and without the presence of the cloth filter bag. In this case the operator merely inserts the opened paper filter through the open end of the cleaner until its bottom is supported by guard wires 2e, 2S. The open upper end of the filter is then pressed outwardly against seating ring 223 and clampingf ring 35 is pivoted downwardly there against as described above. Following this, closure cap 3i) is closed and latched in place by the toggle clamp,
While only a singlev embodiment of the inven tion has been described in detail it will be understood that the underlying principles or the invention can be carried out by various other structures and arrangement of parts, In particular, it will be understood that both the cloth and paper lter bags may be of various cross sectional shapes such as circular, square and rectangular in which case the seating ring, clamping ring and end cap will be of' similar contour and will function in the same manner as described above. It is therefore to be understood that I do not wish to be limited to the particular structure shown and described but to include all equivalent variations thereof except as limited by the scope of the claims.
1. In combination, a suction cleaner having a casing forming a housing for a dirt filter, a lter receiving opening in said casing, means adjacent said opening forming a seat for the. open end of a lter bag housed within said casing, a filter clamping means for clamping the open end of said filter to said lter seating means comprising an annular member hinged to said cleaner to one side of said opening for pivotal movement toward and away from said filter seating means and operable when closed to hold the open end of a filter bag tightly sealed to said filter seating means, said filter clamping means having an opening therethrough permitting the operator to inspect and determine whether the filter is prop erly seated and clamped, a cover for said opening having portions thereof adapted to engage and depress said clamping means, and releasable means for holding said cover in place.
2. A suction cleaner as defined in claim 1 characterized in that said filter seating means and said filter clamping means have complementary frusto-conical filter engaging areas which are inwardly toward the center of said filter housing whereby the closing of said clamping means acts to expand the open end of a filter outwardly into engagement with said filter seating means.
3. A suction cleaner as defined in claim 1 including releasable keeper means between said cover and said clamping means operable to engage and lock said cover and clamping means together when the same are brought into registry with one another.
4. A suction cleaner as defined in claim 3 wherein said cover is hinged to said casing at a point adjacent said hinge for said ilter clamping means whereby the opening of said cover opens said lter clamping means to release the lter bag and clear said casing opening for the expeditious removal therethrough of the filter bag.
5. A suction cleaner having an open ended cylindrical casing forming a filter bag housing,
filter is properly positioned therebeneath, a cover for said casing opening having a portion for engaging said clamping ring and holding the same rmly in place against the open end of a filter bag, and releasable means for securing said cover in place over said opening.
6. A suction cleaner as defined in claim 5 wherein said filter clamping ring is formed of resilient material.
'7. A suction cleaner having a tubular openended casing forming a filter housing, means within said casing for receiving and supporting an open-ended paper lter bag so that the open end thereof is adjacent the open end of said casing, a lter seating ring on said casing having an inwardly flaring filter seating surface opposite the outer rim of said paper filter bag, a resilient filter clamping ring having a rim surface coinplementary to said flaring seating ring operable as the same is telescoped into the open end of the filter to expand the same outwardly into airtight engagement with said seating ring, and holding means for releasably locking said clamping ring in place against said filter.
8. A suction cleaner as defined in claim 7 characterized in that said clamping ring is provided with a hinge connection to said casing at one side thereof so that said ring can be pivoted toward and away from said seating ring whereby upon closing said clamping ring the same enters the open end of said lter at an angle to the mouth thereof and progressively expands the filter against said seating ring.
9. A suction cleaner comprising, a tubular casing having an open end, a motor fan unit housed in said casing in the opposite end thereof from said open end, said open end being provided with an inwardly flaring lter seating ring, means in said casing for supporting a paper filter bag so that the inlet rim thereof is opposite the flaring walls of said seating ring, resilient ring means hinged to the open end of said casing having a flaring rim complementary to said seating ring and receivable by the inlet end of the filter to expand the rim thereof into airtight engagement with said seating ring, an end cap hinged to the open end of said casing, means on said end cap for detachably connecting a suction hose thereto, means on the interior wall of said end cap for engaging said resilient ring and holding the same seated against said filter bag, and common releasable means for holding said resilient ring and said end cap in closed position over the open end of said casing.
10. A suction cleaner as dened in claim 9 including releasable keeper means between said resilient ring and said end cap which interengage automatically as said end cap is closed whereby said ring pivots outwardly along with said cap when the same is swung to open position.
JOHN E. VAN CE.
References Cited in the le of this patent UNITED STATES PATENTS Number Name Date 1,056,865 Webster Mar. 25, 1913 2,025,946 Wehner-Gren Dec. 31, 1935 FOREIGN PATENTS Number Country Date 2,086 Great Britain Dec. 9, 1909