Portable apparatus for blast cleaning

Claim 2

A portable apparatus for blast cleaning a non-horizontal surface comprising: means for upwardly projecting particulate material onto said surface with sufficient energy to rebound therefrom; a gravity feed hopper supplying said projecting means with said particulate material; and channel means disposed above said first means receiving the rebounded particulate material for directing it back to said hopper for reuse.

Claim 3

A portable apparatus according to claim 1 further including: exhaust means for causing a stream of air to pass continuously through said channel means for removing dust and fine particles from the particulate material.

Claim 4

A portable apparatus according to claim 1 further including a compliant seal disposed about said apparatus for confining the particular blast to the apparatus interior.

Claim 5

A portable apparatus according to claim 1 wherein said upwardly projecting means is an airless centrifugal blasting wheel driven by a motor.

Claim 6

A portable apparatus according to claim 1 wherein said hopper is disposed above said projecting means.

Claim 7

A portable apparatus for blast cleaning a non-horizontal surface comprising: means for upwardly projecting particulate material onto said surface with sufficient energy to rebound therefrom; a gravity feed hopper supplying said projecting means with said particulate material; channel means receiving the rebounded particulate material for directing it back to said hopper for reuse including a rebound corridor receiving the rebounded particulate material; at least one deflector plate disposed in said corridor for focusing the rebound path of the particulate to the hopper.

Claim 8

A portable apparatus for blast cleaning a non-horizontal surface comprising: means for upwardly projecting particulate material onto said surface with sufficient energy to rebound therefrom; a gravity feed hopper supplying said projecting means with said particulate material; channel means receiving the rebounded particulate material for directing it back to said hopper for reuse including a rebound corridor receiving the rebounded particulate material; at least one deflector plate disposed in said corridor for focusing the rebound path of the particulate to the hopper.

Claim 9

A portable apparatus according to claim 2 wherein the exhaust means includes: an inlet communicating with said channel means; supply means for causing a stream of air to enter said channel means through said inlet; and an outlet for exhausting dust and fine particles suspended in said stream of air.

Claim 10

In a portable apparatus for blast cleaning a non-horizontal surface, the combination comprising: means for upwardly projecting particulate material onto a surface with sufficient kinetic energy to rebound therefrom; and collecting means disposed above said first means for receiving the rebounded particulate and directing it so that it falls by force of gravity back to said first means for reuse.

Claim 11

In a portable apparatus for blast cleaning a non-horizontal surface, the combination comprising: means for upwardly projecting particulate material onto a surface with sufficient kinetic energy to rebound therefrom; and collecting means disposed above said first means for receiving the rebounded particulate and directing it so that it falls by force of gravity back to said first means for reuse.

Claim 12

The apparatus of claim 8 further including means for causing a stream of air to pass through said collecting means for removing dust and fine particles from the particulate material.

Claim 13

A portable apparatus for blast cleaning a nonhorizontal surface comprising: an airless centrifugal blasting wheel driven by a motor for upwardly projecting particulate material onto said surface with sufficient kinetic energy to rebound therefrom; a gravity feed hopper supplying said blasting wheel with said particulate material; a rebound corridor positioned above the impact area on said surface adapted to receive the rebound particulate matter; at least one deflector plate disposed in said rebound corridor for focusing the rebound path of the particulate material back to said hopper; exhaust means for causing a stream of air to pass continuously through said rebound corridor for removing dust and fine particles; and a compliant seal disposed about said apparatus for confining the particulate blast to the apparatus interior.

Claim 14

A portable apparatus for blast cleaning a nonhorizontal surface comprising: an airless centrifugal blasting wheel driven by a motor for upwardly projecting particulate material onto said surface with sufficient kinetic energy to rebound therefrom; a gravity feed hopper supplying said blasting wheel with said particulate material; a rebound corridor positioned above the impact area on said surface adapted to receive the rebound particulate matter; at least one deflector plate disposed in said rebound corridor for focusing the rebound path of the particulate material back to said hopper; exhaust means for causing a stream of air to pass continuously through said rebound corridor for removing dust and fine particles; and a compliant seal disposed about said apparatus for confining the particulate blast to the apparatus interior.