Vacuum cleaner

Claim 2

A vacuum cleaner comprising: a cleaning unit movable over a floor for cleaning thereof; a handle structure for moving said cleaning unit including a handle and means swingably mounted to said cleaning unit for movement of said handle between an upper operating position and a lower operating position; and cooperating means on said cleaning unit and handle structure for selectively retaining the handle in an intermediate position intermediate said upper and lower operating positions including first stop shoulder means defining a first stop shoulder on said cleaning unit, and second stop shoulder means defining a second stop shoulder on said handle structure, and manually operable means for selectively fixedly positioning said second stop shoulder on said handle in a retaining position or in a retracted position, said first stop shoulder being disposed in the path of movement of said second stop shoulder when said second stop shoulder is selectively disposed in the retaining position while permitting a preselected limited movement of said handle relative to said cleaning unit in said upper operating position, said first stop shoulder being disposed out of the path of movement of said second stop shoulder when said second stop shoulder is selectively disposed in the retracted position to permit said handle to be brought to said lower operating position.

Claim 3

The vacuum cleaner of claim 1 wherein said cooperating means includes means slidably mounting said second stop shoulder on said handle structure for allowing movement of said second stop shoulder from said retaining position to the retracted position, whereby said retracted positioning of said second stop shoulder allows unrestricted movement of said handle structure between said upper and lower operating positions.

Claim 4

The vacuum cleaner of claim 2 wherein said manually operable means includes a manipulating handle.

Claim 5

A vacuum cleaner comprising: a cleaning unit movable over a floor for cleaning thereof; a handle structure for moving said cleaning unit including a handle and means swingably mounted to said cleaning unit for movement of said handle between an upper operating position and a lower operating position; and cooperating means on said cleaning unit and handle structure for selectively retaining the handle in an intermediate position intermediate said upper and lower operating positions including first stop shoulder means defining a first stop shoulder on said cleaning unit and second stop shoulder means defining a second stop shoulder on said handle structure, and manually operable means for selectively fixedly positioning said second stop shoulder in a retaining position, said first stop shoulder being disposed in the path of movement of said second stop shoulder in the retaining position, said cooperating means including means for movably mounting said first stop shoulder means in said cleaning unit, and means for selectively moving said first stop shoulder means to clear said second stop shoulder in said retaining position.

Claim 6

A vacuum cleaner comprising: a cleaning unit movable over a floor for cleaning thereof; a handle structure for moving said cleaning unit including a handle and means swingably mounted to said cleaning unit for movement of said handle between an upper operating position and a lower operating position; and cooperating means on said cleaning unit and handle structure for selectively retaining the handle in an intermediate position intermediate said upper and lower operating positions including first stop shoulder means defining a first stop shoulder on said cleaning unit and second stop shoulder means defining a second stop shoulder on said handle structure, and manually operable means for selectively fixedly positioning said second stop shoulder in a retaining position, said first stop shoulder being disposed in the path of movement of said second stop shoulder in the retaining position, said cooperating means including means for movably mounting said first stop shoulder means in said cleaning unit, and means for selectively moving said first stop shoulder means to clear said second stop shoulder in said retaining position.

Claim 7

The vacuum cleaner of claim 1 wherein at least one of said first and second stop shoulders is deflectible to permit movement of said stop shoulders past each other notwithstanding the disposition of said first stop shoulder in said path of movement of said second stop shoulder in the event of an abnormally high force applied between said cleaning unit and handle structure tending to force said stop shoulders past each other.

Claim 8

A vacuum cleaner comprising: a cleaning unit movable over a floor for cleaning thereof; a handle structure for moving said cleaning unit including a handle, and a suction unit casing swingably mounted to said cleaning unit for movement of said handle between an upper operating position and a lower operating position; cooperating means on said cleaning unit and casing for selectively retaining the handle in an intermediate position intermediate said upper and lower operating positions including first stop shoulder means on said cleaning unit and second stop shoulder means on said casing, said second stop shoulder means defining manually operable means for selectively fixedly positioning said second stop shoulder means in a retaining position or in a retracted position, said first stop shoulder means being disposed in the path of movement of said second stop shoulder means when said second stop shoulder means is disposed in the retaining position; and means for selectively repositioning said first stop shoulder means on said cleaning unit to permit said first stop shoulder means to clear said second stop shoulder means notwithstanding the disposition of said second stop shoulder means in said retaining position.

Claim 9

A vacuum cleaner comprising: a cleaning unit movable over a floor for cleaning thereof; a handle structure for moving said cleaning unit including a handle, and a suction unit casing swingably mounted to said cleaning unit for movement of said handle between an upper operating position and a lower operating position; cooperating means on said cleaning unit and casing for selectively retaining the handle in an intermediate position intermediate said upper and lower operating positions including first stop shoulder means on said cleaning unit and second stop shoulder means on said casing, said second stop shoulder means defining manually operable means for selectively fixedly positioning said second stop shoulder means in a retaining position or in a retracted position, said first stop shoulder means being disposed in the path of movement of said second stop shoulder means when said second stop shoulder means is disposed in the retaining position; and means for selectively repositioning said first stop shoulder means on said cleaning unit to permit said first stop shoulder means to clear said second stop shoulder means notwithstanding the disposition of said second stop shoulder means in said retaining position.

Claim 10

The vacuum cleaner of claim 6 wherein said second stop shoulder means comprises means slidably mounted to said casing.

Claim 11

A vacuum cleaner comprising: a cleaning unit movable over a floor for cleaning thereof; a handle structure for moving said cleaning unit including a handle, and a suction unit casing swingably mounted to said cleaning unit for movement of said handle between an upper operating position and a lower operating position; and cooperating means on said cleaning unit and casing for selectively retaining the handle in an intermediate position intermediate said upper and lower operating positions including first stop shoulder means on said cleaning unit and second stop shoulder means on said casing, said second stop shoulder means defining manually operable means for selectively fixedly positioning said second stop shoulder means in a retaining position, said first stop shoulder means being disposed in the path of movement of said second stop shoulder means in the retaining position, said first stop shoulder means including a finger portion swingably mounted to said cleaning unit.

Claim 12

A vacuum cleaner comprising: a cleaning unit movable over a floor for cleaning thereof; a handle structure for moving said cleaning unit including a handle, and a suction unit casing swingably mounted to said cleaning unit for movement of said handle between an upper operating position and a lower operating position; and cooperating means on said cleaning unit and casing for selectively retaining the handle in an intermediate position intermediate said upper and lower operating positions including first stop shoulder means on said cleaning unit and second stop shoulder means on said casing, said second stop shoulder means defining manually operable means for selectively fixedly positioning said second stop shoulder means in a retaining position, said first stop shoulder means being disposed in the path of movement of said second stop shoulder means in the retaining position, said first stop shoulder means including a finger portion swingably mounted to said cleaning unit.

Claim 13

The vacuum cleaner of claim 8 wherein said casing defines a slot, said finger portion moving in said slot, and said manually operable means includes means for selectively moving said second stop shoulder means into said slot to be engaged by said finger portion of said first stop shoulder means.

Claim 14

A vacuum cleaner comprising: a cleaning unit movable over a floor for cleaning thereof; a handle structure for moving said cleaning unit including a handle, and a suction unit casing swingably mounted to said cleaning unit for movement of said handle between an upper operating position and a lower operating position; and cooperating means on said cleaning unit and casing for selectively retaining the handle in an intermediate position intermediate said upper and lower operating positions including first stop shoulder means on said cleaning unit and second stop shoulder means on said casing, said second stop shoulder means defining manually operable means for selectively fixedly positioning said second stop shoulder means in a retaining position, said first stop shoulder means being disposed in the path of movement of said second stop shoulder means in the retaining position, said casing defining a slot, said first stop shoulder means moving in said slot, said manually operable means including means for selectively moving said second stop shoulder means into said slot perpendicularly to the longitudinal extent of said slot to be engaged by said first stop shoulder means.

Claim 15

A vacuum cleaner comprising: a cleaning unit movable over a floor for cleaning thereof; a handle structure for moving said cleaning unit including a handle, and a suction unit casing swingably mounted to said cleaning unit for movement of said handle between an upper operating position and a lower operating position; and cooperating means on said cleaning unit and casing for selectively retaining the handle in an intermediate position intermediate said upper and lower operating positions including first stop shoulder means on said cleaning unit and second stop shoulder means on said casing, said second stop shoulder means defining manually operable means for selectively fixedly positioning said second stop shoulder means in a retaining position, said first stop shoulder means being disposed in the path of movement of said second stop shoulder means in the retaining position, said casing defining a slot, said first stop shoulder means moving in said slot, said manually operable means including means for selectively moving said second stop shoulder means into said slot perpendicularly to the longitudinal extent of said slot to be engaged by said first stop shoulder means.

Claim 16

A vacuum cleaner comprising: a cleaning unit movable over a floor for cleaning thereof; a handle structure for moving said cleaning unit including a handle, and a suction unit casing swingably mounted to said cleaning unit for movement of said handle between an upper operating position and a lower operating position; and cooperating means on said cleaning unit and casing for selectively retaining the handle in an intermediate position intermediate said upper and lower operating positions including first stop shoulder means on said cleaning unit and second stop shoulder means on said casing, said second stop shoulder means defining manually operable means for selectively fixedly positioning said second stop shoulder means in a retaining position, said first stop shoulder means being disposed in the path of movement of said second stop shoulder means in the retaining position, said casing defining a slot, said first stop shoulder means moving in said slot, said manually operable means including means for selectively moving said second stop shoulder means into said slot to be engaged by said first stop shoulder means, and said vacuum cleaner further including means for selectively moving said first stop shoulder means out of said slot to bypass said second stop shoulder means when desired notwithstanding the selective positioning of said second stop shoulder means in said slot.

Claim 17

A vacuum cleaner comprising: a cleaning unit movable over a floor for cleaning thereof; a handle structure for moving said cleaning unit including a handle, and a suction unit casing swingably mounted to said cleaning unit for movement of said handle between an upper operating position and a lower operating position; and cooperating means on said cleaning unit and casing for selectively retaining the handle in an intermediate position intermediate said upper and lower operating positions including first stop shoulder means on said cleaning unit and second stop shoulder means on said casing, said second stop shoulder means defining manually operable means for selectively fixedly positioning said second stop shoulder means in a retaining position, said first stop shoulder means being disposed in the path of movement of said second stop shoulder means in the retaining position, said casing defining a slot, said first stop shoulder means moving in said slot, said manually operable means including means for selectively moving said second stop shoulder means into said slot to be engaged by said first stop shoulder means, and said vacuum cleaner further including means for selectively moving said first stop shoulder means out of said slot to bypass said second stop shoulder means when desired notwithstanding the selective positioning of said second stop shoulder means in said slot.