Pneumatic hopper discharge outlet

Claim 2

A pneumatic hopper discharge outlet comprising: end walls and inclined side walls having sharp longitudinal edges in parallel spaced relation, a cylindrical valve shaft pivoted at its ends on said end walls about an axis along a line between said sharp longitudinal edges midway thereof and having a diameter such as to provide clearance between it and said sharp longitudinal edges, said valve shaft having cavities for alignment with said sharp longitudinal edges in one position for flow of lading downwardly, said valve shaft in another position closing off the space between said longitudinal sharp edges, a trough underlying said valve shaft for receiving said lading for pneumatic removal, said trough terminating in a semi-cylindrical discharge tube joined to a cylindrical outlet tube, and a wall extending upwardly from said semicylindrical discharge tube, overlying said cylindrical outlet tube with an opening for auxiliary air flow.

Claim 3

The pneumatic hopper discharge outlet according to claim 1 wherein a filter overlies said opening, a removable handle is engageable with the end of said valve shaft for pivot-ing it between open and closed positions, and a pivotable cover is arranged to overlie said filter and to be moved to closed position by said handle on removal thereof from said valve shaft.

Claim 4

The pneumatic hopper discharge outlet according to claim 1 wherein said handle is T-shaped and has an outstanding wrench portion at the lower end of the stem for engaging said end of said valve shaft, and stop means extending from said wall on said discharge tube cooperate with said stem to limit pivotal movement of said valve shaft in opposite directions.

Claim 5

A pneumatic hopper discharge outlet comprising: end walls and inclined side walls having sharp longitudinal edges in parallel spaced relation, a cylindrical valve shaft pivoted at its ends on said end walls about an axis along a line between said sharp longitudinal edges midway thereof anD having a diameter such as to provide clearance between it and said sharp longitudinal edges, said valve shaft having cavities for alignment with said sharp longitudinal edges in one position for flow of lading downwardly, said valve shaft in another position closing off the space between said longitudinal sharp edges, a trough underlying said valve shaft for receiving said lading for pneumatic removal, said trough terminating in a semi-cylindrical discharge tube joined to a cylindrical outlet tube, a wall extending upwardly from said semi-cylindrical discharge tube, overlying said cylindrical outlet tube with an opening in alignment with said shaft to permit insertion and removal thereof, and a removable cover plate for closing off said opening.

Claim 6

A pneumatic hopper discharge outlet comprising: end walls and inclined side walls having sharp longitudinal edges in parallel spaced relation, a cylindrical valve shaft pivoted at its ends on said end walls about an axis along a line between said sharp longitudinal edges midway thereof anD having a diameter such as to provide clearance between it and said sharp longitudinal edges, said valve shaft having cavities for alignment with said sharp longitudinal edges in one position for flow of lading downwardly, said valve shaft in another position closing off the space between said longitudinal sharp edges, a trough underlying said valve shaft for receiving said lading for pneumatic removal, said trough terminating in a semi-cylindrical discharge tube joined to a cylindrical outlet tube, a wall extending upwardly from said semi-cylindrical discharge tube, overlying said cylindrical outlet tube with an opening in alignment with said shaft to permit insertion and removal thereof, and a removable cover plate for closing off said opening.