US2671924A

US2671924A - Counterbalancing means for pivoted motor suction cleaners

Info

Publication number: US2671924A
Application number: US161878A
Authority: US
Inventors: Louis E Segesman
Original assignee: Hoover Co
Current assignee: Hoover Co
Priority date: 1950-05-13
Filing date: 1950-05-13
Publication date: 1954-03-16
Anticipated expiration: 1971-03-16

Description

Mam}! 1954 L. E. SEGESMAN 2,671,924

COUNTERBALANCING MEANS FOR PIVOTED MOTOR SUCTION CLEANERS I Filed May 15, 1950 2 Sheets-Sheet l INVENTOR.

Louis ESe ges'man ATTORNEY.

March 16, 1954 'M N 2,671,924

COUNTERBALANCING MEANS FOR PIVOTED MOTOR SUCTION CLEANERS Filed May 13, 1950 2 Sheets-Sheet. 2

INVENTOR. Louis E Seyesmzm ATTORNEY.

Patented Mar. 16, 1954 COUNTERBALAN GIN G MEANS FOR PIVOTED MOTOR SUCTION CLEANERS Louis E. Segesman, Canton, Ohio, assignor to The Hoover Company, North Canton, Ohio, a corporation of Ohio I Application May 13, 1950, Serial No. 161,878

4 Claims. -350) This invention relates to suction cleaners and more particularly to the type in which the motorfan unit is rotatably or pivotally mounted on the main body of the cleaner on a transverse horizontal axis such as disclosed and claimed in the United States patent to Burkhardt 2,225,621 dated December 24, 1940.

In machines of the above type the handle is rigid with the motor-fan casing and with the exhaust nozzle and the upper end of the filter bag is carried by the handle. According to the present invention the weight of the handle and filter bag is counterbalanced by a spring which surrounds one of the trunnions by which the motorfan casing is pivotally supported.

Other objects and advantages of this invention will become apparent when taken in connection with the accompanying drawing in which:

Figure l is a perspective view of the suction cleaner of this invention with certain parts broken away to show details;

Figur 2 is an end view of the cleaner of Fig. 1 with certain parts broken away to show one of the supporting trunnions; and

Figure 3 is a sectional view through the trunnion taken on line 33 of Fig. 2 and looking in the direction of the arrows.

Referring to the drawings and particularly to Fig. 1 thereof the cleaner of this invention includes a main body 10 mounted for ambulatory movement on front and rear wheels II and I2 respectively and having a downwardly facing nozzle [3 with a bumper l4 positioned along its front edge.

A motor-fan casing I5 is pivotally mounted on the body I0 by a pair of trunnions, one of which is generally indicated at l6, and the other of which may be of the same construction as that disclosed in the abovementioned patent to Burkhardt. A handle socket I! and an exhaust nozzle l8 are rigid with the casing IS. A filter bag I9 has its lower open end detachably connected to the nozzle I8 and its closed upper end supported from the handle 20.

A hood 2| is mounted on top of the body I0 and partially embraces the casing IS. A light transmitting lens 22 is positioned in front of the hood 2| to transmit light rays from a lamp 23 positioned behind the lens 22 and electrically connected to the motor circuit by flexible conductors 24. A furniture bumper or guard 25 extends across the front of the hood 2| above the lens 22.

The motor-fan casing l5 includes a motor 2 housing 30 which extends into a space in the body l0, otherwise unoccupied, which lies at the opposite side of the cleaner from the suction passageway (not shown) which extends upwardly and rearwardly from the nozzle [3 to the suction side of the fan.

The trunnion I6 is shown in detail in Figs. 2 and 3 and comprises a cup-shaped member 3! suitably secured to the end of the housing 30 and which encloses the bearing 32 for on end of the motor-fan shaft. Welded or otherwise secured to the closed end of the cup 3| is a cupshaped member 33 having its open end enclosing the open end of another cup-shaped member 34 carried by a bracket 35 supported in an armate flange 36 of the main frame I 0. A coiled spring 31 is positioned within the cup-

shaped members

33 and 34 and presses against the closed ends thereof to take up any end play in the pivotal supporting means.

A coiled counterbalancing spring 40 surrounds the trunnion it formed by the cup-shaped members 3|, 33, and 34. At one end the coil spring 40 has its hooked end 4| extending over an inturned lug 42 on bracket 35 and at its other end has a second hooked end 43 engaging about a pin 44 extending outwardly from the end of the motor housing 38.

The spring 40 is so wound about the trunnion l6 and so tensioned that movement of the casing 15 in a clockwise direction by movement of the handle 20 to its inclined operating position of use will additionally stress the spring 40 so as to tend to move the handle back to a vertical position and thus counterbalance the weight of the handle 20 and of the filter bag [9. The tensioning of the spring is such that the spring 40 will just about carry the weight of the handle and bag when the handle is in its inclined position of use as shown in Fig. l.

A suitable stop may be provided to limit upward movement of the handle to a vertical storage position. Any suitable handle control detent mechanism may be provided to latch the handle in that position.

While I have shown but a single embodiment of my invention it is to be understood that that embodiment is to be taken as illustrative only and not in a limiting sense. I do not wish to be limited to the specific structure shown and described but to include all equivalent variations thereof except as limited by the scope of the claims.

I claim:

1. A suction cleaner comprising, a body mounted for movement over a surface to be cleaned, a motor-fan unit including a casing, means for pivother end anchored to said casing and being so:

stressed as to tend to move said handle upwardly when said handle is in its position ofuse.

2. A suction cleaner according to 'claimr'ineluding an exhaust nozzle rigid lwithusaidccasing,

a filter bag having a lower-open endasecuredtto said exhaust nozzle and a closed upper end supported from said handle, saidtspringrbeing kso stressed as to substantially carry the weight of said handle and filter bag when said handleds in its inclined position of use.

A suction cleaner=according to claim t-lr-in which said trunniorip-includes an outwardly :opening cup-shaped-member secured to .the end ofl said casing and surrounding an inwardly opening cupshaped member supported on said body so as to form a closed recess between the closed ends of said members.

4. A suction cleaner according to claim 3 including a compression spring pressing against the closed ends of said-cupeshaped members to take up rend play in "said pivotal :supporting means.

LOUIS E. SEGESMAN.

aReferenccswCited in the file of this patent zIINlSIED STA'IES PATENTS Nuniber .lName Date 147,503 Johnson Feb. 17, 1874 13269338 Winfield June 11, 1918 1,892,896 Kirby Jan. 3, 1933 119371765 Leathers Dec. 5, 1933 2,226,365 Becker Dec. 24, 1940 2j246;862 Smllie June-2451941 2253;997 Becker "Aug; 26, 1941