Height adjustment mechanism for a cleaning tool
First Claim
1. A cleaning tool for a vacuum cleaner assembly having a main body portion and a height adjustment mechanism, said height adjustment mechanism comprising:
- at least one roller assembly supporting said main body portion and movable between at least one extended position and a retracted position relative to said main body portion;
a clutch member having a second engaging surface and rotatably secured to a mounting bracket having a first engaging surface, said clutch member mechanically connected to said roller assembly;
a biasing member biasing said second engaging surface of said clutch member against said first engaging surface of said mounting bracket;
said clutch member movable between a clutched position and a de-clutched position when a predetermined force is applied to said main body portion;
said clutch member maintaining said roller assembly at said at least one extended position when said clutch member is at said clutched position and permitting said roller assembly to move to said retracted position when at said de-clutched position.
10 Assignments
0 Petitions
Accused Products
Abstract
A cleaning tool having a height adjustment mechanism which may be overridden to prevent damage to the cleaning tool in the event an excessively high force is applied to an exterior surface of the cleaning tool. The height adjustment mechanism forms an overrideable clutch having a manually adjustable thumbwheel, a biasing member and a clutch member. The height adjustment assembly is operably associated with a roller assembly which supports the cleaning tool on a work surface at a desired height above the work surface. The application of a predetermined excessive force to an exterior surface of the cleaning tool causes the height adjustment assembly to be de-clutched to allow the lower surface of the cleaning tool to come in contact with the work surface, thereby preventing damage to the various internal components of the cleaning tool.
33 Citations
21 Claims
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1. A cleaning tool for a vacuum cleaner assembly having a main body portion and a height adjustment mechanism, said height adjustment mechanism comprising:
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at least one roller assembly supporting said main body portion and movable between at least one extended position and a retracted position relative to said main body portion; a clutch member having a second engaging surface and rotatably secured to a mounting bracket having a first engaging surface, said clutch member mechanically connected to said roller assembly; a biasing member biasing said second engaging surface of said clutch member against said first engaging surface of said mounting bracket; said clutch member movable between a clutched position and a de-clutched position when a predetermined force is applied to said main body portion; said clutch member maintaining said roller assembly at said at least one extended position when said clutch member is at said clutched position and permitting said roller assembly to move to said retracted position when at said de-clutched position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A cleaning tool for a vacuum cleaner assembly having a main body portion and a height adjustment mechanism, said height adjustment mechanism comprising:
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at least one roller assembly movable between a plurality of extended positions and a retracted position relative to said main body portion, said roller assembly supporting said main body portion; a pivot bar operatively connecting said roller assembly to a thumbwheel; said thumbwheel secured to a mounting bracket and rotatable about a longitudinal axis, rotation of said thumbwheel moving said at least one roller assembly between said retracted position and said plurality of extended positions; a key mechanism keying said thumbwheel to a clutch member, said key mechanism rotating said clutch member concurrently with a rotation of said thumbwheel, said key mechanism permitting longitudinal movement of said clutch member along said longitudinal axis independent from longitudinal movement of said thumbwheel along said longitudinal axis; said clutch member rotatably secured to said mounting bracket, said clutch member movable between a clutched position and a de-clutched position in response to one of rotation of said thumbwheel or a pre-determined force applied against said main body portion; and said clutch member maintaining said at least one roller assembly at any one of said plurality of extended positions when said clutch member is at said clutched position and permitting said roller assembly to move between said plurality of extended positions and said retracted position when at said de-clutched position. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for cleaning a surface with a cleaning tool and providing an adjustment mechanism for said cleaning tool, said method comprising the following steps:
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connecting a cleaning tool having a main body portion and rotating a brush member to a vacuum source; moving a height adjustment mechanism having a clutch member to one of a plurality of positions to select a height above the cleaning surface for the cleaning tool; supporting the main body portion at the selected height above a surface to be cleaned by at least one roller assembly connected to the height adjustment mechanism; cleaning the surface by passing the cleaning tool over the surface; and retracting the at least one roller assembly into the main body portion, thereby collapsing the cleaning tool onto the surface in response to application of a pre-determined force to the main body portion.
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21. A cleaning tool for a vacuum cleaner assembly having a main body portion and a height adjustment mechanism, said height adjustment mechanism comprising:
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at least one roller assembly supporting said main body portion and movable between at least one extended position and a retracted position relative to said main body portion; a clutch member having a second engaging surface and rotatably secured to a mounting bracket having a first engaging surface; a thumbwheel rotatably secured to said mounting bracket and mechanically connected to said roller assembly, said thumbwheel slidably keyed to said clutch member, rotation of said thumbwheel moving said roller assembly between said at least one extended position and said retracted position; a biasing member located between said thumbwheel and said clutch member, said biasing member biasing said second engaging surface of said clutch member against said first engaging surface of said mounting bracket; said clutch member movable between a clutched position and a de-clutched position when a predetermined force is applied to said main body portion; said clutch member maintaining said roller assembly at said at least one extended position when said clutch member is at said clutched position and permitting said roller assembly to move to said retracted position when at said de-clutched position.
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Specification