Vacuum cleaner

• US 5,134,749 A
• Filed: 09/21/1990
• Issued: 08/04/1992
• Est. Priority Date: 09/29/1989
• Status: Expired due to Fees

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Sakurai, Hidetoshi, Sasai, Gorou, Sagawa, Kouiti
• Primary Examiner(s): MOORE, CHRISTOPHER K
• Application Number:
  US07/585,927
• Time in Patent Office: 683 Days
• Field of Search: 15/325, 15/327.1, 15/327.2, 293/125
• US Class Current: 15/325
• CPC Class Codes: A47L 5/362 of the horizontal type, e.g. canister or sledge type
• CPC Class Codes: A47L 9/009 Carrying-vehicles; Arrangements of trollies or wheels; Means for avoiding mechanical obstacles
• CPC Class Codes: A47L 9/2821 Pressure, vacuum level or airflow
• CPC Class Codes: A47L 9/2889 Safety or protection devices or systems, e.g. for prevention of motor over-heating or for protection of the user

Abstract

A vacuum cleaner includes a cleaner body to which an intake hose is connectable, traveling members for enabling the traveling of the cleaner body, and an obstacle-escaping angularly-movable member angularly movably mounted on the cleaner body. A dust collector chamber is formed in a front portion of the cleaner body, and an electrically-operated fan is mounted in a rear portion of the cleaner body. The angularly-movable member is so arranged as to be angularly movable around an outer wall of the dust collector chamber. A portion of the angularly-movable member projects outwardly from the front face of the cleaner body and the front side portions of the cleaner body.

Claims

1. A vacuum cleaner comprising a cleaner body to which an intake hose is connectable;

traveling means for enabling the traveling of said cleaner body;

an obstacle-escaping angularly-movable member angularly movably mounted on said cleaner body;

a dust collector chamber being formed in a front portion of said cleaner body;

an electrically-operated fan being provided in a rear portion of said cleaner body;

said angularly-movable member being so arranged as to be angularly movable around an outer wall of said dust collector chamber;

wherein a portion of said angularly-movable member projects outwardly from a front face of said cleaner body and front side surfaces of said cleaner body.

2. A vacuum cleaner according to claim 1, wherein said traveling means comprises a pair of front casters and a pair of rear casters, said angularly-movable member being disposed below a position where said intake hose is connected to said cleaner body.

3. A vacuum cleaner according to claim 1, wherein said angularly-movable member is a cushioning member.

4. A vacuum cleaner according to claim 1, wherein said angularly-movable member has the shape of a disk, ends of said cleaner body being formed respectively at the front side surfaces of said cleaner body for the entrance and exit for said angularly-movable member, said ends being disposed rearwardly of the axis of angular movement of said angular-movable member.

5. A vacuum cleaner according to claim 1, in which said angularly-movable member has the shape of a disk, an outer diameter of said angularly-movable member being substantially equal to the maximum transverse width of said cleaner body.

6. A vacuum cleaner according to claim 1, in which said angularly-movable member has angular movement angle-limiting means for setting the angle of angular movement of said angularly-movable member to a range of between 60°

to 180°

.

7. A vacuum cleaner according to claim 1, in which the axis of angular movement of said angularly-movable member is displaced toward the front side of said cleaner body from a vertical line passing through the center of gravity of said cleaner body.

8. A vacuum cleaner comprising a cleaner body having a dust collector chamber formed in a front portion thereof, and an electrically-operated fan mounted in a rear portion of said cleaner body;

a lid member closing a top opening of said dust collector chamber;

an intake hose connected to said lid member and communicating with said dust collector chamber;

traveling means for enabling the traveling of said cleaner body;

an obstacle-escaping angularly-movable member angularly movably mounted on said cleaner body;

a cushioning member mounted on an outer wall of said angularly-movable member;

said angularly-movable member being angularly movable around an outer wall of said dust collector chamber provided within said cleaner body, wherein at least an outer wall of said cushioning member projects from said cleaner body.

9. A vacuum cleaner according to claim 8, in which said intake hose is disposed substantially on the centerline of the transverse width of said cleaner body, when viewed from the top of said cleaner body, the shape of that portion of said cushioning member projecting from said cleaner body being substantially right and left symmetrical with respect to said centerline.

10. A vacuum cleaner according to claim 8, wherein said lid member includes a rotation shaft angularly movable mounted on said cleaner body, an outer lid, an inner lid, and a first plurality of mounting pieces mounted on said outer lid and a second plurality of mounting pieces mounted on said inner lid to angularly movably mount said lid member on said cleaner body.

11. A vacuum cleaner according to claim 8, wherein said vacuum cleaner further comprises a clamp for retaining said lid member on said cleaner body, and an operating button for said clamp and having a surface, with a recess in the surface of the operating button indicating the position of said button.

12. A vacuum cleaner according to claim 8, wherein said intake hose is angularly movably connected to said lid member, said traveling means comprises a pair of front casters and a pair of rear casters, a portion of said intake hose being connected to said lid member and disposed closer to the front end of said cleaner body than a vertical axis of rotation of each of said front casters.

13. A vacuum cleaner according to claim 8, wherein the front face of said cleaner body has a curved shape, the external shape of the front face of said cleaner body being substantially similar to the external shape of a portion of said angularly-movable member that projects from said cleaner body, when viewed from the top of said cleaner body.

14. A vacuum cleaner according to claim 8, in which said angularly-movable member is angularly movable about a substantially vertical axis.

15. A vacuum cleaner comprising a cleaner body to which an intake hose is connectable;

traveling means for enabling the traveling of said cleaner body; and

obstacle-escaping angularly-movable member angularly movably mounted on said cleaner body; and

return means by which when said angularly-movable member is angularly moved in one direction upon collision with an obstacle on a surface to be cleaned including a floor, and is moved away from said obstacle, said angularly movable member is angularly returned to an initial position in a direction opposed to said one direction, wherein said obstacle escaping angular-movable member projects outwardly from said cleaner body.

16. A vacuum cleaner comprising a cleaner body having a dust collector chamber formed in a front portion thereof, and an electrically-operated fan mounted in a rear portion of said cleaner body;

and intake hose connected to a lid member closing a top opening of said dust collector chamber, and communicating with said dust collector chamber;

traveling means for enabling the traveling of said cleaner body; and

an obstacle-escaping angularly-movable member angularly movably mounted on said cleaner body and projecting outwardly from said cleaner body;

said cleaner body comprising an upper and a lower split case; and

a soft material being integrally molded on an entire surface of said upper case.

17. A vacuum cleaner according to claim 16, in which said upper case is made of a synthetic resin having a Rockwell hardness of 50 to 80, said soft material having a rubber Shore hardness of 30 to 40, and said soft material having a thickness of about 1.5 mm to about 3.5 mm.

18. A vacuum cleaner according to claim 16, in which a bumper of a soft synthetic resin is mounted on the outer periphery of said angularly-movable member, the outer periphery of said soft material integrally molded on the surface of said upper case being projected outwardly beyond the outer periphery of said lower case at least over the entire width of the front face of said cleaner body, and the outer periphery of said bumper being projected outwardly beyond the outer periphery of said soft material.

19. A vacuum cleaner comprising a cleaner body having a dust collector chamber formed in a front portion thereof, and an electrically-operated fan mounted in a rear portion of said cleaner body;

and intake hose connected to a lid member closing a top opening of said dust collector chamber, and communicating with said dust collector chamber;

traveling means for enabling the traveling of said cleaner body; and

an obstacle-escaping angularly-movable member angularly movably mounted on said cleaner body and projected outwardly from said cleaner body;

said cleaner body comprising an upper and a lower split case;

said electrically operated fan being incorporated in a motor case, said motor case being incorporated in a lower case cover, said lower case cover being mounted on an inner bottom of said lower case, thereby forming an exhaust passage between said lower case cover and said lower case.

20. A vacuum cleaner according to claim 19, in which a fine dust-arresting filter is mounted in said exhaust passage.