Vacuum system
First Claim
1. A multiple inlet vacuum cleaning system, comprising a group of independently openable and closeable collection inlets for sucking in air and trash carried in by the air, means to remove trash from said air, a common conduit connected to said collection inlets, vacuum generating means connected to draw air from the common conduit at a position along the common conduit downstream of said collection inlets, air inlet means openable to admit enough air to the common conduit to blow out residual trash therein, means to sense conditions indicating low flow of air through the common conduit likely to leave residual trash therein, such as when few collection inlets are open, and means responsive to the sensing means for opening said air inlet means when such low flow air is sensed.
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Accused Products
Abstract
Multiple inlet vacuum system having parallel exhausters, air admission valves upstream of inlets, and differential vacuum sensors and exhauster amperage sensors controlling the valves.
16 Citations
11 Claims
- 1. A multiple inlet vacuum cleaning system, comprising a group of independently openable and closeable collection inlets for sucking in air and trash carried in by the air, means to remove trash from said air, a common conduit connected to said collection inlets, vacuum generating means connected to draw air from the common conduit at a position along the common conduit downstream of said collection inlets, air inlet means openable to admit enough air to the common conduit to blow out residual trash therein, means to sense conditions indicating low flow of air through the common conduit likely to leave residual trash therein, such as when few collection inlets are open, and means responsive to the sensing means for opening said air inlet means when such low flow air is sensed.
- 4. A multiple inlet vacuum cleaning system, comprising independently openable and closeable collection inlets for sucking in air and trash carried in by air, means to remove trash from said air, a plurality of common conduits each connected to a different group of said collection inlets, vacuum generating means connected to draw air from each of the common conduits at a position along the common conduit downstream of its connected group of said collection inlets, and air inlet means on each common conduit openable to admit enough air to the common conduit to blow out residual trash therein when too few of the connected collection inlets are open to blow out the trash.
Specification