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US 6,029,720 AGranted
Dispensing tool assembly for evacuating and charging a fluid system
OwnerMark D. Swinfordinventor
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OwnerMark D. Swinfordinventor
Estimating the term…
A generally oval upper body supports a generally cylindrical lower body comprising an outlet tube on which is mounted an inner piston containing an annular resilient sealing member adapted to be connected to the tubular inlet fitting of a liquid coolant system. The lower body supports a set of arcuate collar sections which are cammed inwardly for gripping external threads on the inlet fitting in response to axial movement of an outer air actuated annular piston surrounding the outlet tube. The sealing member is compressed axially into the upper face of the inlet fitting in response to axial movement of the inner air actuated annular piston confined between the outlet tube and the outer piston. A tubular valve member comprising an integral air actuated annular piston is supported for axial movement within the upper body in alignment with the outlet tube for selectively connecting the passage within the outlet tube to a suction passage for evacuating the coolant system and then to a fluid supply passage for filling the system. A streamlined obturator mounted in the upper body is aligned axially with the outlet tube and comprises arcuate passageways for flow of the fluid following connection of the valve member to the outlet tube.
A dispensing tool assembly for connecting a fluid charging unit to a liquid receiving system having a tubular inlet fitting with upper inner and outer surfaces, said tool assembly comprising a body having a center axis and means forming an axially extending outlet tube defining an outlet passage, said body defining a suction passage for evacuating the system and a fluid supply passage for filling the system, said outlet passage mounting an inner fluid actuated piston further mounting a resilient annular sealing member and movable axially between a retracted position and an extended position for engaging the upper planar surface of the inlet fitting, said tool assembly comprising gripping means disposed around said outlet tube and supported for generally radial movement between an inward gripping position engaging the outer surface of the inlet fitting and a retracted released position, said tool assembly comprising movable valve means within said body for selectively connecting said suction passage and said fluid supply passage to said outlet passage, said tool assembly comprising means forming a streamlined obturator for selective sealing engagement with said valve means, said tool assembly comprising means including an outer fluid actuated piston positioned for moving said gripping means between said gripping and released positions in response to axial movement of said outer piston, and means defining passages within said body for directing pressurized fluid to said outer and inner pistons.
A dispensing tool assembly for connecting a fluid charging unit to a liquid receiving system having an inlet fitting with an upper surface, said tool assembly comprising a body having a center axis and including a portion forming an axially extending outlet passage, said outlet passage mounting an inner fluid actuated piston further mounting a resilient annular selling member in alignment with the upper surface of said inlet fitting and movable axially between a retracted position and an extended position for engaging the upper surface of said inlet fitting, said tool assembly comprising gripping means disposed around said body portion and supported for generally radial movement between an inward gripping position engaging the inlet fitting and a retracted released position, said body defining a suction passage for evacuating the system and a fluid supply passage for filling the system said tool assembly comprising means forming a tubular valve member within said body and defining a center passage in axial alignment with said outlet passage, said valve member supported by said body for axial movement between a first position closing said fluid supply passage and connecting said suction passage to said outlet passage and a second position closing said suction passage and connecting said fluid supply passage to said outlet passage, said tool assembly comprising means forming a streamlined obturator concentrically supported within said fluid supply passage and positioned in axial alignment with said valve member for selective sealing engagement with said valve member, means including a first fluid actuated piston positioned for moving said gripping means between said gripping and released positions in response to axial movement of said first piston, means including a second fluid actuated piston integral to said valve member for moving said valve member between said first and second positions in response to axial movement of said second piston, and means defining passages within said body for directing pressurized fluid to said first and second pistons.
A dispensing tool assembly for connecting a fluid charging unit to a liquid receiving system having a tubular inlet fitting with inner and outer surfaces, said tool assembly comprising a body having a center axis and means forming an axially extending outlet tube defining an outlet passage, said body defining a suction passage for evacuating the system and a fluid supply passage for filing the system, said tool assembly comprising means forming a movable valve member within said body for selectively connecting said suction passage and said fluid supply passage to said outlet passage, said tool assembly comprising means forming a streamlined obturator concentrically supported within said fluid supply passage and positioned in axial alignment with said valve member and said outlet tube for selective sealing engagement with said valve member, said valve member comprising a fluid actuated piston integral to said valve member for moving said valve member in response to axial movement of said piston, and means defining passages within said body for directing pressurized fluid to said piston.
A dispensing tool assembly for connecting a fluid charging unit to a liquid receiving system having a tubular inlet fitting, said dispensing tool assembly comprising:
Dependencies are inferred from the claim text.