Vacuum system

• US 5,893,194 A
• Filed: 06/14/1996
• Issued: 04/13/1999
• Est. Priority Date: 06/28/1995
• Status: Expired due to Fees

• Current Assignee: Israel Karmel
• Original Assignee: Israel Karmel
• Inventors: Karmel, Israel
• Primary Examiner(s): MOORE, CHRISTOPHER K
• Application Number:
  US08/664,339
• Time in Patent Office: 1,033 Days
• Field of Search: 15/301, 15/314, 15/422.2
• US Class Current: 15/314
• CPC Class Codes: A47L 5/22 with rotary fans
• CPC Class Codes: A47L 5/38 Built-in suction cleaner installations, i.e. with fixed tube system to which, at different stations, hoses can be connected

Abstract

A vacuum system for a building, in particular, a building with multiple dwellings. There is a fan to develop suction mounted in a compartment having a dust inlet and a dust outlet. A motor drives the fan. The motor has a drive shaft to extend into the fan compartment. There is a dust collection head communicating with the inlet. A dust disposal pipe connected to the outlet extends to a remote dust receptacle. There is a vent for the dust receptacle to prevent dust being fed back into the atmosphere. The system can operate satisfactorily without a filter. It draws dust in from a point between the source of the dust and the dust receptacle so that suction is not applied through the contents of the dust receptacle.

Claims

1. A vacuum ejection unit comprising:

a housing defining a motor compartment and a pair of opposed fan compartments, each fan compartment being separated from the motor compartment by an air tight partition;

a motor located in the motor compartment;

opposed drive shafts extending from said motor into the fan compartments;

a first fan mounted on one drive shaft in the first fan compartment and a second fan mounted on the other drive shaft in the second fan compartment;

an inlet and an outlet in each fan compartment;

the first fan having an opposite pitch from the second fan and the outlet of the first fan compartment communicating with the inlet of the second fan compartment such that the fans co-operate to draw air into the inlet of the first fan compartment, through the outlet of said first fan compartment, to the inlet of the second fan compartment and from the outlet of the second fan compartment.

2. A vacuum system for a building comprising:

a housing defining a motor compartment and a pair of opposed fan compartments, each fan compartment being separated from the motor compartment by an air tight partition;

a motor located in the motor compartment;

opposed drive shafts extending from said motor into the fan compartments;

a first fan mounted on one drive shaft in the first fan compartment and a second fan mounted on the other drive shaft in the second fan compartment;

a dust inlet and a dust outlet in the housing;

a dust collection head communicating with said dust inlet;

an inlet and an outlet in each fan compartment;

the dust inlet of the housing communicating with the inlet of the first fan compartment, and the dust outlet of the housing communicating with the outlet of the second fan compartment;

the first fan having an opposite pitch from the second fan and the outlet of the first fan compartment communicating with the inlet of the second fan compartment such that the fans co-operate to draw air, together with any dust present therein, via the dust inlet into the inlet of the first fan compartment, through the outlet of said first fan compartment, to the inlet of the second fan compartment and from the outlet of the second fan compartment to the dust outlet of the housing;

a dust disposal pipe connected to said dust outlet to extend to a remote dust receptacle; and

a vent for said dust receptacle.

3. A vacuum system for a building comprising:

a vacuum ejector unit comprising a housing having a fan compartment and a motor compartment separated by an air tight partition, a fan to develop suction mounted in the fan compartment, the fan compartment having a dust inlet and a dust outlet, and a motor mounted in the motor compartment to drive said fan, said motor having a drive shaft to extend into said fan compartment through said partition;

a dust collection head in which the vacuum ejector unit is incorporated to receive dust under suction at the inlet of the vacuum ejector unit;

a dust disposal pipe connected to said outlet of the vacuum ejector unit for carrying dust under positive pressure;

a remote dust receptacle connected to said dust disposal pipe; and

a vent for said dust receptacle.

4. A system as claimed in claim 3 in which the building includes multiple building units having at least one common dust disposal pipe for a plurality of building units.

5. A vacuum system for a building having multiple building units comprising:

a plurality of vacuum ejector units positioned at at least one location in the building remote from each of the building units, each vacuum ejector unit comprising a housing having a fan compartment and a motor compartment separated by an air tight partition, a fan to develop suction mounted in the fan compartment, the fan compartment having a dust inlet and a dust outlet, and a motor mounted in the motor compartment to drive said fan, said motor having a drive shaft to extend into said fan compartment through said partition,

a dust collection head at each building unit communicating with the inlet of one of said plurality of vacuum ejector units to receive dust under suction;

a dust disposal pipe connected to each of the outlets of said plurality of vacuum ejector units for carrying dust under positive pressure to a common dust receptacle; and

a vent for said dust receptacle.