초록 ▼

In a proportional valve assembly, particularly for supplying compressed air on a glassware molding machine, a tubular body, having an axis and air inlet and outlet ports, houses a slide member which is slid axially along the axis, to open and close the inlet and outlet ports, by a linear actuator, o

In a proportional valve assembly, particularly for supplying compressed air on a glassware molding machine, a tubular body, having an axis and air inlet and outlet ports, houses a slide member which is slid axially along the axis, to open and close the inlet and outlet ports, by a linear actuator, on the one hand, and, on the other, by the reaction exerted by an elastic body and the compressed air; the elastic body being spaced apart from the slide member and connected to the slide member by a relatively moving device.

대표청구항 ▼

1. A proportional valve assembly for supplying compressed air on a glassware molding machine, the assembly comprising a tubular body having an axis and inlet and outlet ports for an operating fluid; at least one movable slide member housed in said tubular body; a linear actuator for exerting control

1. A proportional valve assembly for supplying compressed air on a glassware molding machine, the assembly comprising a tubular body having an axis and inlet and outlet ports for an operating fluid; at least one movable slide member housed in said tubular body; a linear actuator for exerting control action on said slide member; and reaction means for exerting on the slide member an opposing action in opposition to the control action, and for moving said slide member along said axis; characterized by also comprising relatively moving means interposed between said reaction means and said slide member, andsaid relatively moving means comprise self-leveling articulated joint means with spherical heads; andsaid articulated joint means comprise a first and a second spherical-headed articulated joint,said spherical heads are connected integrally to each other, andfurther characterized in that said relatively moving means comprise a push member separated from said slide member; and coupling means for connecting the push member to said slide member;further characterized in that said first and said second spherical-headed articulated joint comprise respective spherical heads having respective different radii of curvature. 2. An assembly as claimed in claim 1, characterized by comprising guide means for guiding said push member along said axis. 3. An assembly as claimed in claim 1, characterized in that said coupling means comprise a single coupling body distinct from said push member and said slide member. 4. An assembly as claimed in claim 1, characterized in that said first and said second spherical-headed articulated joint are spaced apart along said axis. 5. An assembly as claimed in claim 1, characterized in that said first and said second spherical-headed articulated joint are arranged in series. 6. An assembly as claimed in claim 1, characterized in that said reaction means comprise elastic reaction means; and in that, of said spherical-headed articulated joints, the articulated joint closer to said elastic reaction means is the one with the smaller-radius spherical surface. 7. An assembly as claimed in claim 1, characterized in that said spherical heads form part of a body formed in one piece. 8. An assembly as claimed in claim 1, characterized in that said push member houses at least partly at least one of said spherical heads. 9. An assembly as claimed in claim 8, characterized in that said push member houses at least one of said spherical heads with a radial and axial clearance. 10. An assembly as claimed in claim 8, characterized in that said push member houses at least partly both said spherical heads. 11. An assembly as claimed in claim 1, characterized in that said push member is defined by an end surface on which said fluid exerts an opposing action in opposition to said control action. 12. An assembly as claimed in claim 11, characterized in that said push member has an outside diameter smaller than the inside diameter of said tubular body. 13. A proportional valve assembly for supplying compressed air on a glassware molding machine, the assembly comprising a tubular body having an axis and inlet and outlet ports for an operating fluid; at least one movable slide member housed in said tubular body; a linear actuator for exerting control action on said slide member; and reaction means for exerting on the slide member an opposing action in opposition to the control action, and for moving said slide member along said axis; characterized by also comprising relatively moving means interposed between said reaction means and said slide member, characterized in that said relatively moving means comprise a push member separated from said slide member; andsaid relatively moving means comprise self-leveling articulated joint means; andsaid articulated join means comprise a first and a second spherical-headed articulated joint,characterized in that said spherical-headed articulated joint has respective straight conical flared seat s and coupling means for connecting the push member to said slide member. 14. A glassware molding machine comprising at least one operating unit, and pneumatic supply and control means for supplying said operating unit with a pressurized operating fluid; characterized in that said pneumatic supply and control means comprise at least one valve assembly, the assembly comprising a tubular body having an axis and inlet and outlet ports for an operating fluid; at least one movable slide member housed in said tubular body; a linear actuator for exerting control action on said slide member; and reaction means for exerting on the slide member an opposing action in opposition to the control action, and for moving said slide member along said axis; characterized by also comprising relatively moving means interposed between said reaction means and said slide member, andsaid relatively moving means comprise self-leveling articulated joint means with spherical heads; andsaid articulated join means comprise a first and a second spherical-headed articulated joint.said spherical heads are connected integrally to each other, andfurther characterized in that said relatively moving means comprise a push member separate form said member; and coupling means for connecting the push member to said slide member;further characterized in that said first and said second spherical-headed articulated joint comprise respective spherical heads having respective different radii of curvature.