US1067029A - Pumping mechanism for vacuum-cleaners. - Google Patents

Description

R. B. HUTGHISON- PUMPING MECHANISM FOR VACUUM CLEANERS. APPLICATION FILED JUNE 24, 1912.

Patented July 8, 1913.

' Il /4rd WITNESSES, 47 MENTOR MW ,l @M @M MM Wwmw coLuMnm l-LANonQAPn C0.. WASHINGTON. D. c.

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tll tlillfll) b TA'lES Ptilitilblll ()Fidlttllil ROBERT B. I-IUTCHISON, F WILKINSBURG, PENNSYLVANIA.

PUMPING MECHANISM FOR VACUUM-CLEANERS.

Application filed June 24, 1912.

To all ur/mm, it may (zomnrnv:

ive it known that I, ,llonnn'r ll. ll u'rouison, a citizen o'l the United States, residing at ll ilkinslmrg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful linproven'ients in lum 'iing iiechanism :lor Vacuuni-Cleaners, of which the 't'ollowing is a specification.

My invention is an improvement in vacuum cleaners.

It. consist of a portable apparatus operable by traction and comprises a hollow cylindrical body or barrel having at its forward end a suction nozzle, at its rear end a. pair of siiipporting wheels and a crank shaft, plunger mechanism and valves controlling the circulation of induced air currents in operative connection with said crank shaft and with relation to a middle valved partition or head, a removable dust bag, and an operating handle, together with other features of detail construction and improvement as shall be more fully hereinafter described.

In the drawings Figure it is a view of the device in side elevation. Fig. 2 is a longitudinal vertical sectional view of the device. ll ig. 3 a similar sectional view showing the plunger mechanism in reversed position. Fig. 4t is a treat end of the apparatus. Fig. 5 is a cross sectional view on the .line V. V. of Fig. 3.

The body portion of the cleaner consists of a cylindrical barrel portion or case 2 of sheet metal provided at or about its middle with a transverse stationary head 3 fixedly secured to the shell or barrel 2 by screws 4, or otherwise, the device being provided with an operating handle 5 of any desired length having the bifurcated or forked extren'iity consisting of the sides 6. The terminals of these sides are pivotally connected at about the middle portion ot' the apparatus by the screws ustuds 4: which extend through the shell and into the head 3, as indicated.

The rear portion of the machine is mount ed upon wheels 7, 7, the peripheries of which are preterably provided with rubber tires, or otherwise formed to provide for good traction upon the surface of the liner. The wheels 7 are 'tixedly attached by their hubs to the outer ends of crank-shaft 8 having a middle crank portion 9. The rear end of the eylimler 9 is closed by a cap '10 of sheet Specification of Letters Patent.

,leatented July 8, 1913.

Serial No. 705,487.

metal tightly tilting around the end ol the main case to which are fixedly connected the bearings for shaft 8 in the same manner as that shown in my prior application, tiled April 1t), 1912, Her. No. (389,780. The said application shows a structlure which gen erally similar, but embodying bellows mechanism. The rear side portions of the shell 52 are slotted, as indicated at it tor clearance of the bearings so that when the. cap inserted in position, the bearings are fixedly located and the parts are connected in operative relation. The cap 10 is secured upon the rear end of shell 2 by means of bolts and nuts 14, ()ptIllIlgS to being provided through the cap for the double purpose of providing for air circulation and for manipulation ol the bolts and nuts in connecting these parts.

At the trout end of the casing 2, I provide a removable head 16 having at its lower portion a nozzle terminal 17 longitlulinally slotted across its middle portion, as indicated at 18, ot ample width to cover the desired tloor area, and communicating with the interior oil the case by an upwardly and inwardly disposed circulating passage The head It; is preferably provided around its inner edge with a packing ring or cover at any suitable material set in an annular receiving groove and is tightly clamped against the end of the case by securing screws 2t having linger tern'linals. as shown, said screws extending through slotted ears projecting outwardly at each side of head It) and threaded into suitz'ible receiving lugs 23. lly this construction, upon loosening the screws 521, the head 'lti may be slightly rotated or released tor access into the int crior, and as readily replaced.

l n\\-'ardly beyond the outer end ot the case .2 is a. transverse imperlorate partition 27, soldered or otherwise secured to the case, between which and the outer end at the case is provided a sullicient receptacle 1-0 to! the dust collecting bag 28. Said bag is mounted upon a circular tlrame 29 which bears inwardly against an inner annular shoulder 30 making a sulliciently tight lit with the interior ol the casing to prevent the passage of dust. The frame 29 is provided with a transverse bar 31. by which it may be read ily grasped for removal or insertion.

The transverse head 3, which is prc'terably o'l" wood, is of ample thickness to provide a spectively, which are preferably made of sheet metal in two circular sections, formed to provide an annular receiving groove for an inserted packing ring 36, and oper-.

able to create air suction.

Packing ring 36 for each piston is prefe ably rectangular in cross section, of comparatively soft rubber like cushion rubber or other similar material, and is loosely mounted in the annular cavity 35 with its ends abutting or overlapping diagonally, and having suflicient resiliency to maintain it normally distended into contact with the inner faces of the shell.

The head 3 is provided with a transverse port 37 communicating by a central. port 38 and an outer bypass conduit 39 with the dust bag compartment40 beyond. the partition 37, as clearly shown. The conduit 39 may be of sheet metal orother suitable mate rial'and of any desired form in cross section, and its function is to establish continuous circulating communication bet-ween the chamber40 and the interior spaces a, 7), re spectively, between the head 3 and reciprocable pistons'33 and 34, alternately'during the operation of the device. The port 37 through head 3 is provided with flap valves 41 and'42 respectively, of any suitable material as rubber, leather, etc., preferably having circular thickened body portions connectedby a flexible neck with a securing portion of the flap valve by which it is secured, as shown, to head 3.

Each piston 33 and 34 is likewise provided with a circulating port 43 and 44 respectively,'which are also covered on their outer sides with similar flap valves 45 and 46, re spectively. The case 2 is likewise apertured, as at 47, between head 3 and partition 27 for outward circulation of air.

The rear end of plunger 32 is connected in any suitable manner, as by a clevis 48 of sheet metal or other material and a two-part link 49 with the crank 9. The link 49 may be of hard wood in halves secured together by screws or bolts 50 and embracing the crankshaft 9 and a pin 51 extending transversely through each side of the clevis 48.

For the purpose of maintaining plunger 32 in alinement centrally through the head 3, I provide at each side of the head surrounding tlie'plunger, series of ball or roller ' bear ings 52, 52, mounted within surrounding bushing rings 53 and retained by cover plates 54, 54. The middle portion of the head 3 snugly embraces the plunger 32 without any unnecessary binding by which con struction a practically air-tight fit is securet. Due to the ample thickness of head 3 and the alining action of bearings 52, the plunger 32 is retained centrally in position at all times independent of any lateral thrust due to its connection with the actuating crank 9.

Due to the construction and arrangement of the working parts, the wheels, crankshaft, cap, link, pistons, plunger and head 3 are connected as one unitary structure, and may be assembled and applied to the machine or taken away therefrom by merely remov ing screws 4 and 4 and bolts 14.

The operation of the device will be readily understood from the foregoing description.

The weight of the case 3 and its contents by the pivotal mounting upon the axle shaft causes the nozzle to remain in close operative position over the floor surface. By merely manipulating the machine to and fro by its handle, the suction heads and 34 are operated back and forth and effect a strong suction in each direction through conduit 39, the dust being arrested in the bag 38 and the incoming air escaping through the openings 14 and 47. The use of plunger- s 33 and 34 with their loosely mounted resilient packing rings effects efficient suction by tight engagement with the inner cylindrical wall of the case, avoiding the necessity of supplemental bellows, without undue friction.

The device is very easily manipulated; it is simple and compact in construction and sufficiently low to be passed. under beds or other articles of furniture; and is very durable and strong and not liable to get out of order.

Having described my invention, what I claim is 1. In a vacuum producing apparatus, the combination of a portable cylindrical casing having at one end a suction opening and at the other end a removable apertured cap provided with journal bearings, a crank shaft mounted in said bearings having supporting wheels, a middle transverse partition having valve controlled ports opening at each side thereof and communicating with the suction opening, and a central reciprocable plunger extending through said partition connected with the crank shaft and provided with a valved piston at each side of said partition, the crank shaft and its connected parts forming a removable unitary structure, substantially as set forth.

2. In a vacuum producing apparatus, the combination of a portable cylindrical casing having at one end a suction opening and at the other end a removable apertured cap provided with journal bearings, a crank mounted in said bearings having supporting wheels, a middle transverse partition having valve controlled ports opening at each side thereof, a conduit outside of the casing communicating with said ports and with the suction opening, and a central reciprocalole plunger extending through said partition 10. :Inavacuum producing apparatus, the combination of ,a cylindrical casing'having a middle transverse head provided with a transverse valve-controlled port andv a. cen tral bearing openingya removable suction headhaving an intake opening,1apartit-ion between theasuction head andithe zilllClCllG head providing an vair chamber and 1a suction cha1nber,.a filter removabl mounted in the air cha-mberya conduit connecting the air chamber and said valve-controlled port, a removable closure for the otherv end of the casing having axle bearings, an axle mounted. therein having supporting wheels and Ya crank, and a reciprocable piston inothe suetion chamber having a stem extending through the central bearing opening. of the middle:transverse head vand connected with the axle crank,substantially as set forth.

11. In a vacuum producing apparatus, the combination'of a portablecylindrical casinghaving at one end a bearing portion provided with a suction opening and having atthe other end an vapertured cap and journalbearings, a crank-shaft mounted in said bearingsand having traction wheels supporting the other endofthe apparatus, a middle:transverselpartition within the casing having valve-controlled ports opening at each side thereofand communicating with the suction opening, and a central reciprocable plunger extending through said partition connected with the crank shaftand provided with a valvedpiston at each side of said partition, the crank shaft-and its connected parts forming a unitary structure, substantially asset forth.

:In testimony whereof-Ihereunto affix my signature in1the presence of two witnesses.

ROBERT B. HUTCHISON.

lVitnesses C. M. CLARKE, FREDK. S'rAUn. k

Copies of-this patent-maybe obtained forfi-ve cents each, by addressing the Commissioner-of:Patents Washington, 1). Ci

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