Variable high/low vacuum/blower device
First Claim
1. A vacuum/blower device comprising:
- a housing having air flow channels, said channels having and entry end and an exit areaair inlet means for air intake and air outlet means for air exhaust both of which extend through said housing and are connected to said air flow channels;
motor driven upper and lower blower wheels mounted in said housing relative to said air flow channels for creating air flow-through said air flow channels from the air inlet means to the air outlet means;
said lower blower wheel being located at an entry area of said air flow channels for receiving intake air from said air inlet means;
first valve means operable between first and second positions for selectively changing the air flow in said air flow channels;
said first valve means when operable in a first position directing the flow of exhausted air from said lower blower wheel to said upper blower wheel for high pressure/low air flow operation;
said first valve means when operable in a second position enabling intake air from the air inlet means to be directed to said upper blower wheel in addition to air intake by said lower blower wheel at the entry end of said air flow channels for low pressure/high air flow operation; and
second valve means at an exit area of said air flow channels and being operable between first and second positions for selectively changing the air flow-through said air inlet means and air outlet means to provide either a vacuum or blower device.
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Accused Products
Abstract
A variable high/low vacuum/blower device is disclosed as including an interchangeable vacuum or blower device with high pressure/low air flow or low pressure/high air flow operation. The device includes a housing having air flow channels. Air inlet and air outlet ports or openings extend through the housing and are connected to the air flow channels. Motor driven blower wheels create air flow through the air flow channels. A first valve, operable between first and second position, can selectively change the air flow in the air flow channels from high pressure/low air flow to low pressure/high air flow, while a second valve, also operable between first and second positions, can selectively change the air flow through the air inlet and air outlet ports or openings, enabling the device to operate either as a vacuum or blower device. The first valve, when operable in a first position, directs exhausted air from the lower blower wheel to the upper blower wheel for high pressure/low air flow operation. In its second position, the first valve enables intake air to be directed to the upper blower wheel, in addition to the normal intake of air by the lower blower wheel. The second valve is located at an exit area of the air flow channels for selectively changing the air flow, in order to enable the device to operate as either a vacuum or blower.
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Citations
14 Claims
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1. A vacuum/blower device comprising:
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a housing having air flow channels, said channels having and entry end and an exit area air inlet means for air intake and air outlet means for air exhaust both of which extend through said housing and are connected to said air flow channels; motor driven upper and lower blower wheels mounted in said housing relative to said air flow channels for creating air flow-through said air flow channels from the air inlet means to the air outlet means; said lower blower wheel being located at an entry area of said air flow channels for receiving intake air from said air inlet means; first valve means operable between first and second positions for selectively changing the air flow in said air flow channels; said first valve means when operable in a first position directing the flow of exhausted air from said lower blower wheel to said upper blower wheel for high pressure/low air flow operation; said first valve means when operable in a second position enabling intake air from the air inlet means to be directed to said upper blower wheel in addition to air intake by said lower blower wheel at the entry end of said air flow channels for low pressure/high air flow operation; and second valve means at an exit area of said air flow channels and being operable between first and second positions for selectively changing the air flow-through said air inlet means and air outlet means to provide either a vacuum or blower device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A vacuum/blower device comprising:
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a housing having air flow channels, said channels having an entry end and an exit area, a single air inlet/outlet port extending through said housing and connected to said air flow channels; a flexible hose connected to said single inlet/outlet port; air exhaust/intake openings formed in said housing for exhausting air when said single inlet/outlet port is used to draw air into the air flow channels and for intaking air when said single/outlet port is used to exhaust air from the air flow channels; motor driven upper and lower blower wheels mounted in said housing relative to said air flow channels for creating air flow-through said air flow channels from the single inlet/outlet port to the air exhaust/intake openings; said lower blower wheel being located at an entry area of said air flow channels for receiving intake air from said single inlet/outlet port or said air exhaust/intake openings; first valve means operable between first and second positions for selectively changing the air flow in said air flow channels; said first valve means when operable in a first position directing the flow of exhausted air from said lower blower wheel to said upper blower wheel for high pressure/low air flow operation; said first valve means when operable in a second position enabling intake air to be directed to said upper blower wheel in addition to air intake by said lower blower at the entry end of said air flow channels for low pressure/high air flow operation; and second valve means at an exit area of said air flow channels and being operable between first and second positions for selectively changing the air flow-through said single air inlet/outlet port and interconnected flexible hose and said air exhaust/intake openings to provide either a vacuum or blower device. - View Dependent Claims (11, 12, 13, 14)
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Specification