US2135885A - Vacuum cleaner - Google Patents

Description

Nov. 8, 1938.

D. M. DOW

VACUUM CLEANER Filed Feb. 25, 1956 Patented UNlTED STATES PATENT OFFICE vacooiv r ::a1 sn Dewey M. Dow,

Way Electric Ohio, a corporation of Delaware Application February 25, 1936,

shown in section to better illustr Claims.

This invention relates to vacuum cleaners and has as its object to provide an improved rotary agitator of the type having a tubular spindle.

' One problem in connection with such an agi- 5 tator is that of mounting the agitating elements to the spindle. The invention, in dealing with this problem, provides an agitating element that is received in a longitudinal slot in the spindle shell and seated against the outer faces of the 10 edge regions of the shell defining said slot, and is held in such seating position by a securing element inserted through the diametrically opposite region of the shell wall. v

The invention aims to render the device as easy to manipulate as possible. To this end, the agitating element has an extension which projects diametrically through the shell to a point closely adjacent the opening through which the securing element is extended, and the latter ooacts with the end of such attached because of such close proximity;

The invention tened depressed region in the shell to which an agitating element can be mounted. It provides such flattened region in the form of a die-formed plate, welded into a slot that has been .mllled or punched into the shell. I tubular stock and retains its true tubular form when worked up in this manner, whereas if it so were-subjected to a forming operation to impress the depressed region into its own wall, it would be distorted so that it would be practically im- 7 possible to secure the proper running balance in the finished spindle.

The invention also the spindle in the floor tool,,and provides a novel end bearing and bearing guard assembly embodying-a ball bearing-of relatively inexpensive type and a detachable stub shaft which serves'the dual '40 purpose of providing the supporting connection and the agitator, and debetween the floor tool tachably securing the guard over the end of the spindle and over the bearing. It also provides an arrangement in which the stub shaft is threaded 55 m. 2 is an end view of the same, parts being extension and is easily deals also with providing a iiat-- The shell is made of deals with the mounting of I Toledo, Ohio, assignor Appliance Corporation,

tion;

Fig. 3 is a to the spindle; Fig. 4 is a Serial No. 65,626

fragmentary vie illustrating the drive pulley an lustrating the brush element Fig.5isa

detail sectional view thereo .on the line 5-5 of Fig. 4;

Fig. 6 is a sectional view through one end of a vacuum cleaner floor tool rotary agitator mounting and th er element; and i Fig. 7 is a transverse s tator taken on Fig. 8 is a cross section line 8-8 of Fig. 4.

bottom view of a mo element; and

Fig. 1.0 is a sectional view of the brush element mounting.

spindle Nils f tube stock, preferabl red length and thence perforated slots ll (Fig. 3)

taken on the Fig. 9 is a of the brush The agitator drical seamless is cut to the desi to provide the b and'the beater mo A drive pulley P is lame drawn to form pressed inwardly to form to snugly receive l3, forming pa form trimmed opposite flange sheet, is drawn dle, and is formed w the line 1--1 rush mounting unting slots l2 fragmentary view of the spindle ilmountin ate the construcw of the spindle d its attachment i; taken and portions of the ectional view of the agiof Fig.

(Fig. '1).

illustrating its end bearing e mounting of the flexible beatof the brush mounting,

difled form a modified form of ormed from cyliny steel, and

d of sheet metal, deep I I the crowned rim I4, and thence outwardly to wings I! which 'rest against the spindle wall a Bristles l9 are Secured to an end web II,

together and spot with claws 21 eng SOME be detachable by sliding between the claws 22. 11

Fig. the back l1. are not welded a ng between them the back welded,

rue post a may be secured to form a permanent the a flange l5 which is the spindle II. The rt oi the original the hub collar the spindle.

the

thereof. or

back longitudinally permanently secured. it clamping action oi th es a back l1 ived in the slot l I of the spinith integral lateral flanges or, outer faces of t the margins of the slot ll. nted in-the back l1.

isa.clip or centrally bent to form ght to the back l'l may f the clip in engaging relation by the edges of the slot II. This allows the operator to employ the guard 42 as The central region of the back 11 may be a means to hold the inner race against rotating thickened as at 23 to the width of wings l8, in while the stud 45 is being unthreaded topermit of which case the slot II is centrally widened at 24 cleaning and greasing the bearing.

to receive the claws 22, or the back may be re- The stub shaft 44 has aflattened end 50 engagecessed as at 25 in Fig. 9, to receive the claws 22, able in a groove 5| in the end Wall 46. A hair pin in which case the slot H may be of uniform width shaped spring 53 secured to the end wall by 8.

throughout. rivet 52, embraces and clasps the stub shaft so as In the web 2| is a threaded opening 26. In the to support the agitator in the floor tool 41. wall of the shell I 0, diametrically opposite the slot The present invention includes as one of its obaround the slot H. A short screw 28 may then We find that maximum efliciency is obtained by be slipped through the hole 21 and readily threadthe use of two double heaters disposed midway ed into the opening 26 without difliculty. between the ends of the spindle, and diametrically In a modified form of t e invention shown in opposed so as to be dynamically and statically balacross the space within the spindle, and the post single plane at right angles to the plane of the 20 is not employed, the screw being threaded diheaters, and alternately on opposite sides of the rectly into the back IT. The preferred form is, spindle from one end thereof to the other. Their however, that shown in .Fig. 5, which has the paths of rotation just meet each other, end to end. advantage over the other form in that it elimito completely cover the spindle from one end to nates feeling for the threaded opening with the the other.

screw. I claim as my invention:

The flexible beater F comprises dual blocks of 1. In a vacuum cleaner, a rotatable tubular soft rubber 29 integrally moulded in a metal tube spindle provided with a longitudinal slot, a deflexible. The blocks 29 are provided with metal in said slot, the bristle side of said back being latthereto. Centrally of the plate is a depressed cnt P j c ing diamet y a s S Spindle at 35 to form in conjunction with detachable Spindle at d ppos e de, and being accessible bearing caps 36 the aforesaid bearings for the frOm Said pp side for a m t I trunnjons on the d of t b 30 2. In a vacuum cleaner, a rotatable tubular The caps 36 are secured in place by bolts 37. A Spindle Provided With a longitudinal 8 a 49 Two of these double heaters are employed dia- 0f Said p d adjacent the margins of said slot, metrically opposite each other on opposite sides n asecuring m nt n in id k nd other. said opposite side for detachment. The rotary agitator is m unt d on b l bear- 3. Inavacuum cleaner,a rotatable tubular spinings, one at each end of the spindle. A cup 33 is dle provided with alongltudinal slot, 2. demountaonly tend to screw the stud into the race Other- 4. In a vacuum cleaner,a rotatable tubu ar spinwise, a stub shaft mlght be driven through the dle provided with a longituddnal slot, a demount- 19 end wall 46 of the floor tool 47. able brush element having a back received in A pair of dimples 48 in the guard 42 are seated said slot, the bristle side of said back being proin depressions 49 (Fig. 2) in the inner race, to vided with means to engage the outer face of said give a non-rotatable connection between guard spindle adjacent the margins of said slot, and a andinner race when the stud 45 is tightly in place. securing element engaging said back and holding Lulu- El it in the slot, said element rigidly projecting diametrically across said spindle from the opposite side thereof, engaging the said spindle at said opposite side, and being accessible from said opposite side for detachment, said securing element comprising a long screw extended through said opposite side 01' the spindle and having a head engaging said opposite side, its other end threaded into said back.

5. In a vacuum cleaner, a rotatable tubular spindle provided with a longitudinal slot, a demountable brush element having a back receivable in said slot, and securing means comprising a clip having at one end claws in which the back of the brush is held, said clip projecting diametrically across the spindle to a point adjacent the opposite side region of the spindle wall, and an. attaching element projected through said opposite side region and detachably engaging the adjacent end of said clip.

6. In a vacuum cleaner, a rotatable tubular spindle provided with a longitudinal slot, 3. demountable brush element having a back received in said slot, and securing means comprising a clip having at one end claws in which the back of the brush is held, and between which said back is longitudinally slidable when removed from the spindle, for attaching or detaching the clip to or from the back, said clip projecting diametrically across the spindle to a point adjacent the opposite side region of the spindle wall, and an attaching element projected through said opposite side region and detachably engaging the adjacent end of said clip.

7. In a vacuum cleaner, a rotatable tubular spindle provided with a longitudinal slot, a demountable brush element having a back receivable in said slot, and securing means comprising a clip formed of a strip of sheet metal bent back upon itself and its ends brought together to form at one end spaced claws in which the back of the brush is held, said clip projecting diametrically across the spindle to a point adjacent the opposite Search Room side region of the spindle, and an attaching element projected through said opposite side region and detachably engaging the adjacent end of said clip. v

8. In a vacuum cleaner, a rotatable tubular spindle provided with a longitudinal slot, a demountable brush element having a back received in said slot, and securing means comprising a clip formed of a strip of sheet metal bent back upon itself and its ends brought together to form at one end spaced claws in which the back of the brush is held, and at its other end a transverse web portion that has a threaded aperture, and a screw projected through the opposite side region of the spindle and threaded into said aperture.

9. In a vacuum cleaner, a rotatable tubular spindle provided in one side with a longitudinal slot, a demountable brush element having a back received in said slot, the bristle side of said back being laterally extended to form wings that engage the outer face of the wall of said spindle at the margins of said slot, and securing means attached to said back and holding it in the slot, said securing means comprising a post secured at one end to the brush back and removable therewith, said post projecting diametrically across the spindle and its other end extending close to the opposite side of the spindle, and a securing element extended through said opposite side and detachably attached to the adjacent end of the post.

10. In a vacuum cleaner, a rotatable tubular spindle provided with a longitudinal slot, a demountable brush element having a back receivable in said slot, and securing means attached to said back and holding it in the slot, said means comprising a post secured at one end to the brush back and removable therewith, said post projecting diametrically across the spindle and its other end extending close to the opposite side of the spindle, and a securing element extending through said opposite side and detachably engaging said other end of the post.

DEWEY M. DOW.

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