Apparatus for pressure treating a surface

A high-pressure surface treating apparatus comprising:

• a framework comprised of one or more frame members;
• at least one rotary spray unit flexibly associated with each frame member, each rotary spray unit comprising at least one rotary spray arm having at least one nozzle directed away from said framework, a high pressure surface treatment medium supply conduit, a rotary union having an axis of rotation and connecting said high pressure medium supply conduit with said rotary spray arm;
• enclosure means for enclosing one or more of said rotary spray units against the surface being treated;
• rotary spray unit positioning means for individually positioning each of said respective rotary spray units relative to the surface being treated;
• primary framework positioning means comprising a cylinder framework, two or more work cylinders fixedly or pivotably connected to said cylinder framework, pistons provided in said cylinder moveable against a pressure medium, connecting rods connected at one end to said pistons and pivotably connected at the other end to a generally planar connecting rod framework,
• pressure medium supplied to said work cylinder;
• control means responsive to changes in pressure in each of said work cylinders to adjust the pressure in each of said work cylinders to maintain a constant pressure;
• wherein said framework extends along a plane, and wherein said framework is rotatably connected to said connecting rod framework for rotation in said framework in said plane about at least 90°.

A high-pressure surface treating apparatus comprising:

• a framework comprised of one or more frame members;
• at least one rotary spray unit flexibly associated with each frame member, each rotary spray unit comprising at least one rotary spray arm having at least one nozzle directed away from said framework, a high pressure surface treatment fluid supply conduit, a rotary union having an axis of rotation and connecting said high pressure fluid supply conduit with said rotary spray arm;
• enclosure means for individually and/or collectively enclosing one or more of said rotary spray units against the surface being treated;
• resilient mechanical rotary spray unit positioning means for individually maintaining the position of each rotary spray unit relative to the surface being treated.

A high-pressure surface treating apparatus comprising:

• a framework comprised of one or more frame members;
• at least one rotary spray unit flexibly associated with each frame member, each rotary spray unit comprising at least one rotary spray arm having at least one nozzle directed away from said framework, a high pressure surface treatment fluid supply conduit, a rotary union having an axis of rotation and connecting said high pressure fluid supply conduit with said rotary spray arm;
• enclosure means for individually and/or collectively enclosing one or more of said rotary spray units against the surface being treated;
• resilient mechanical rotary spray unit positioning means for individually maintaining the position of each rotary spray unit relative to the surface being treated;
• and
• wherein said apparatus comprises at least two rotary spray units, and wherein said at least two rotary spray units are pivotable independently of each other.

A high pressure surface treating apparatus comprising:

• a framework comprised of one or more frame members;
• at least one rotary spray unit flexibly associated with each frame member, each rotary spray unit comprising at least one rotary spray arm having at least one nozzle directed away from said framework, a high pressure surface treatment fluid supply conduit, a rotary union having an axis of rotation and connecting said high pressure fluid supply conduit with said rotary spray arm;
• resilient mechanical rotary spray unit positioning means for individually maintaining the position of each rotary spray unit relative to the surface being treated;
• said rotary spray unit positioning means for individually positioning each of said respective rotary spray units relative to the surface being treated includes a mechanical contact element for contacting a surface to be treated, and a rigid mechanical coupling between said mechanical contact and said rotary union, and
• wherein said rotary union is resiliently flexibly connected to said frame member,
• such that movement of the mechanical contact element causes a corresponding movement of said rotary union and thereby of the rotary spray unit.