Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS2985905 A
Publication typeGrant
Publication dateMay 30, 1961
Filing dateAug 31, 1959
Priority dateAug 31, 1959
Publication numberUS 2985905 A, US 2985905A, US-A-2985905, US2985905 A, US2985905A
InventorsCaufield Donald C
Original AssigneeCaufield Donald C
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Surface cleaner
US 2985905 A
Previous page
Next page
Description  (OCR text may contain errors)

y 1 D. c. CAUFIELD 2,985,905


DONALD C. CAU FIELD ATTORNEY Patented May 30, 1961 SURFACE CLEANER Donald c. Caufield, Rte. 87, Columbia, (Ionn.

Filed Aug. 31, 1959, Ser. No. 837,276

1 Claim. c1. 15-353 This invention relates to a floor, sidewalk or other flat surface cleaner provided with a motor driven suction impeller.

More particularly the invention relates to a cleaner of the motor-driven vacuum type having a metal receptacle detachably attached to the discharge conduit for the impeller and also having a detachably attached fabric bag attached thereto.

One feature that is important is that the intake conduit for the impeller at the forward end of the cleaner has an elongated narrow opening closely adjacent the surface to be cleaned, the discharge conduit of the impeller extending above the impeller and then horizontally rearward of the cleaner.

Another feature that is of advantage is that the discharge conduit ends in a horizontal frame member having its upper and lower surfaces open to form attaching surfaces for the depending metal receptacle and a foraminous receptacle attached to the upper rim of the frame.

Another object of the invention is to provide bafiles or louvres in the open frame member discharge conduit to guide small metal or other relatively heavy articles picked up by the impeller into the depending metal receptacle and to permit dust and small particles to be blown into the fabric receptacle.

With the above and other objects in view the invention may include the features of construction and operation set forth in the following specification and illustrated in the accompanying drawing.

In the accompanying drawing annexed hereto and forming a part of this specification I have shown the invention embodied in a manually movable vehicle having an internal combustion engine driven impeller, but it will be understood that the invention can be otherwise embodied, and that the drawing is not to be construed as defining or limiting the scope of the invention, the claims appended to this specification being relied upon for that purpose.

In the drawing:

Fig. l is a plan view of a floor cleaner made in accordance with the present invention and Fig. 2 is a side elevation partially broken away of the cleaner shown in Fig. 1.

In the above mentioned drawing, there has been shown but one embodiment of the invention which is now thought to be preferable, but it will be understood that changes and modifications may be made within the scope of the appended claims without departing from the spirit of the invention.

Referring more in particular to the figures of the drawing, the cleaner comprises a frame or truck supporting a motor driven impeller 12, the motor 14 shown being shown as a small standard gasoline motor to which the impeller 12 is directly attached at its forward end for rotation on a horizontal axis. As the motor 14 and impeller 12 are, or may be, of any standard types further description is not thought necessary. It will suflice to state that the impeller 12 when rotated at high speed provides a strong suction in its intake conduit 16 sufficient to pick up loose articles on the surface being cleaned. The truck 10 is provided with a pair of wheels 18 for supporting the weight of the cleaner. Also, preferably'a small Wheel 20 may be mounted on the frame or truck 10 directly below the intake conduit 16. The truck 10 terminates at the rear in a pair of horizontally extending handles 22 by which the cleaner may be moved and guided.

On the truck or frame 10 is a small platform on which is mounted the motor 14, the one shown being a standard form of gasoline motor to the mainshaft of which extending forwardly therefrom is directly attached the hub of the impeller 12. As shown the impeller is of the open blade type and is mounted for rotation at high speed, about a horizontal axis.

The impeller 12 is enclosed within a housing 24 having intake conduit 16 and a discharge conduit26. The intake conduit 16 as shown extends forwardly from the impeller housing 24 and downwardly so that its forward edge is closely adjacent the surface over which the cleaner is traversed. The forward end of the intake conduit is greatly widened and the walls form a narrow elongated front opening closely adjacent the surface being cleaned.

The discharge conduit 26 for the impeller 12 inclines upward and then extends horizontally toward the rear of the cleaner. The forward part of this conduit extends over the top of the impeller housing 24 to which it is attached. The rear portion of the discharge conduit extends beyond the impeller housing 24 and is in the form of an open frame 30 having the vertical walls only, the upper and lower surfaces being entirely open. To the lower edge or rim of this frame 30 is attached detachably by suitable clamps 32 a depending metal receptacle 34. To support the open frame of the discharge conduit the side walls of the open frame may be attached to the bars forming the handles 22 which in addition aid in supporting the metal receptacle.

To the upper edge or rim of this open frame 30 is attached a flexible somewhat porous textile or fabric bag 36. This bag 36 as shown in its deflated condition extends forward over the discharge conduit 26 and has its closed forward end attached as shown to a portion of the impeller housing 24. This bag 36 may have its open end clamped against the upper edge of the open frame 30 of the discharge conduit by means of a metal rim 38 fitting the shape of the rim of the open frame 30. Clamps of any form may be used to detachably attach the rim 38 and bag 36 to the frame 30.

To deflect metal and other articles picked up by the impeller 12 a curved bafile member 40 extending transversely'of the open frame 30 is mounted within the forward upper part of the open frame. Any articles striking this baflle will be forced downward into the metal receptacle 34. In addition to this curved bafile 40 there are a series of deflector strips 42 provided extending transversely of the open frame 30. By means of these deflector strips or louvres only dust and other particles can reach the fabric bag 36 with the current of air from the impeller 12.

Preferably the curved baffle member 40 and the deflecting strips or louvres 42 may be mounted in fixed position frame having upper and lower horizontal rim portions 3 defining opposite openings, a receptacle detachably mounted on and depending from said lower horizontal rim portion, a foraminous flexible bag detachably attached to the upper horizontal rim portion of said frame and a plate removably disposed on said upper horizontal rim portion at the entrance to said bag, said plate comprising a plurality of transversely extending louvers and a curved downwardly extending baffle member adjacent the entrance of said discharge conduit into the frame, whereby said bafiie member and louvers successively deflect heavy debris downwardly into said receptacle and the spaces between said louvers permit passage of dustladen air into said bag for filtering.

References Cited in the file of this patent UNITED STATES PATENTS Thurman Oct. 3, 1899 Bennett July 10, 1923 Newport Mar. 12, 1957 Moffat Feb. 25, 1958 FOREIGN PATENTS -Great Britain ;;of 1905 Germany May 9, 1930

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US634042 *Nov 14, 1898Oct 3, 1899John S ThurmanPneumatic carpet-renovator.
US1461173 *Sep 4, 1917Jul 10, 1923Bennett Ashley CSuction cleaner
US2784440 *May 26, 1955Mar 12, 1957Wayne Mfg CompanyIndustrial sweeping machines
US2824335 *Feb 17, 1955Feb 25, 1958Handling Devices Co IncMobile suction floor cleaner
DE497495C *May 9, 1930AegBeutelstaubsauger
GB190526781A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3233274 *Jan 28, 1963Feb 8, 1966Tennant Co G HSweeping machine dust separator apparatus
US3491399 *Jun 27, 1966Jan 27, 1970Scott & Fetzer CoVacuum cleaner
US3534429 *Mar 4, 1968Oct 20, 1970Parker Sweeper CoDeflector for a vacuum cleaner
US5129124 *Oct 26, 1990Jul 14, 1992Komatsu Zenoah CompanyCleaning machine
US5129125 *Oct 29, 1990Jul 14, 1992Komatsu Zenoah CompanyCleaning machine
US7185389 *May 29, 2003Mar 6, 2007Great Lakes Engineering + Design, Inc.Universal wet/dry vacuum cart
U.S. Classification15/353, D32/16
International ClassificationA47L5/28, A47L5/22
Cooperative ClassificationA47L5/28
European ClassificationA47L5/28