Corded handheld vacuum cleaner

• US 5,448,794 A
• Filed: 09/16/1993
• Issued: 09/12/1995
• Est. Priority Date: 09/16/1993
• Status: Expired due to Term

• Current Assignee: Electrolux PLC (AB Electrolux)
• Original Assignee: Electrolux Canada Corporation (AB Electrolux)
• Inventors: Mancl, Dennis J., Walch, John W.
• Primary Examiner(s): Simone, Timothy F.
• Assistant Examiner(s): Till, Terrence R.
• Application Number:
  US08/122,149
• Time in Patent Office: 726 Days
• Field of Search: 15/326, 15/344, 15/363, 15/377, 15/383, 15/392, 15/412
• US Class Current: 15/326
• CPC Class Codes: A47L 5/24 Hand-supported suction cleaners
• CPC Class Codes: A47L 9/22 Mountings for motor fan assemblies

Abstract

A handheld vacuum cleaner is provided that has a motor mounted with the rotational axis of its shaft parallel to the rotational axis of the rotating brush. The vacuum cleaner motor has an end bell, which is attached to the motor stator, and which holds a motor shaft bearing. The end bell is secured to the vacuum housing with an elastomeric mounting ring to dampen motor vibrations. The need for most motor mounting hardware is eliminated, because the housing supports the motor stator directly. The intake orifice of the vacuum is shaped to lie in two distinct planes, so that flat cleaning surfaces do not obstruct the orifice. The shape of the intake also allows one to clean immediately adjacent to a vertical wall.

Claims

1. A handheld vacuum cleaner for removing dirt from a cleaning surface, the handheld vacuum cleaner comprising:

a housing having an intake orifice;

a handle connected to the housing, the handle having a longitudinal axis;

a rotating brush having a brush rotational axis and being mounted in the housing adjacent to the intake orifice for dislodging dirt from the cleaning surface as the brush rotates about said brush rotational axis;

a motor having a rotating motor shaft, said rotating motor shaft having a shaft rotational axis, the motor being mounted in the housing such that said shaft rotational axis of the motor shaft is substantially parallel to said brush rotational axis of the brush and substantially perpendicular to the handle;

means for transferring rotational motion from the motor to the rotating brush;

a suction fan chamber in said housing coupled to the intake orifice;

an exhaust chamber in said housing coupled to the suction fan chamber;

a suction fan rotatably mounted in the suction fan chamber, the suction fan being coupled to the motor shaft so that the suction fan is rotated by the motor, the suction fan drawing air through the intake orifice into the suction fan chamber and passing said air into the exhaust chamber, the suction fan having a plurality of suction fan blades and being coupled to the motor shaft so that the suction fan blades rotate with the motor shaft, each suction fan blade having a suction fan blade tip;

a tongue member located between the suction fan chamber and the exhaust chamber, the tongue member being adjacent to the suction fan blades and being angled at a non-zero angle with respect to the suction fan blade tips; and

dirt collection means connected to the exhaust chamber for receiving said air from the exhaust chamber and for collecting any dirt present in said air.

2. The handheld vacuum cleaner of claim 1, wherein the means for transferring rotational motion from the motor to the rotating brush comprises an untwisted belt connected between the motor shaft and the brush, so that when the motor shaft rotates, the belt rotates the brush.

3. The handheld vacuum cleaner of claim 1, wherein the means for transferring rotational motion from the motor to the rotating brush comprises:

a toothed belt;

a pinion on the motor shaft; and

teeth disposed circumferentially on the brush to form a pulley, wherein the toothed belt engages the pinion and the teeth, so that the motor rotates the brush.

4. A vacuum cleaner for removing dirt from a cleaning surface, the vacuum cleaner comprising:

a housing having an intake orifice;

a motor mounted to the housing, the motor having a rotating motor shaft that rotates about a rotational axis;

a suction fan chamber coupled to the intake orifice;

a suction fan rotatably positioned in the suction fan chamber for drawing air through the intake orifice into the suction fan chamber, the suction fan having a plurality of suction fan blades and being coupled to the motor shaft so that the suction fan blades rotate with the motor shaft, each suction fan blade having a suction fan blade tip;

an exhaust chamber coupled to the suction fan chamber for receiving said air;

a tongue member located between the suction fan chamber and the exhaust chamber, the tongue member being adjacent to the suction fan blades and being angled at a non-zero angle with respect to the suction fan blade tips; and

dirt collection means connected to the exhaust chamber for collecting any dirt present in said air as said air exits the exhaust chamber.

5. The vacuum cleaner of claim 4, further comprising a cooling fan connected directly to the motor shaft for supplying cooling air to the motor when the motor shaft is rotated.

6. The vacuum cleaner of claim 5, wherein the cooling fan is surrounded by a shroud formed as an integral part of the housing.

7. The vacuum cleaner of claim 4, wherein the exhaust chamber is bounded by a spiral-shaped wall, the spiral-shaped wall having a surface that extends substantially parallel to the rotational axis of the motor, such that the separation between the spiral-shaped wall and the suction fan blade tips gradually increases in the direction of rotation of the suction fan around the rotational axis of the motor shaft.

8. The vacuum cleaner of claim 4, further comprising:

a rotating brush mounted to the housing adjacent to the intake orifice for dislodging dirt from the cleaning surface as the brush rotates; and

means for transferring rotational motion from the rotating motor shaft to the rotating brush, the means for transferring rotational motion being coupled between the rotating brush and the rotating motor shaft.

9. The vacuum cleaner of claim 4 further comprising:

a toothed belt;

a pinion mounted on the motor shaft; and

teeth disposed circumferentially on the brush to form a pulley, wherein the toothed belt engages the pinion and the pulley, so that the motor can rotate the brush.

10. The vacuum cleaner of claim 4, wherein the motor further comprises a partially cylindrical end bell, the cylindrical portion of the end bell being axially aligned with the rotational axis of the motor shaft, wherein the housing has at least one motor mounting rib that lies in a plane substantially perpendicular to the rotational axis of the motor shaft, and further comprising an elastomeric member that fits between the motor mounting rib and the end bell for securing the motor within the housing, wherein the surface of the elastomeric member has a plurality of raised elastomeric ribs that extend substantially parallel to the rotational axis of the motor shaft, the raised elastomeric ribs being compressed between the motor mounting rib and the end bell.

11. The vacuum cleaner of claim 4, further comprising:

a bearing for supporting the motor shaft, the bearing having a slot; and

a ridge formed as an integral part of the housing, the ridge mating with the slot to prevent rotation of the bearing with respect to the housing.

12. The vacuum cleaner of claim 4, wherein the housing has an improved intake orifice defined by a front wall, a rear wall, and side walls, the side walls having front and rear portions, wherein the underside of the front wall and the undersides of the front portions of the sides walls lie substantially in a first plane and the underside of the rear wall and the underside of the rear portions of the side walls lie substantially in a second plane which intersects the first plane.

13. The vacuum cleaner of claim 4, further comprising at least one deflection rib disposed adjacent to the brush, the deflection rib deflecting any dirt entering the intake orifice, so that such dirt is caught up in said air drawn into the suction fan chamber, rather than being deflected back toward the intake orifice.