| 摘要 |
A device (10) to empty fluid from a sealed pressure container (12) by use of pressurized air, and thereafter to place the container (12) under vacuum. The device (10) has a sleeve portion (28) which defines an interior chamber (36). A ring portion (34) with a hole (38) extends into the interior chamber (36) and forms a seating surface (48). A slidable seat (42) with an aperture (44) is located in the interior chamber (36) below the ring portion (34) and is sized to loosely fit in the interior chamber (36) and seat on the ring portion (34). An upper cap (72) with an air channel (74) is located at the upper end (30) of the sleeve (28) and a lower cap (52) with an air channel (54) is placed at the lower end (32) of the sleeve portion (28). A spring (50) placed in the interior chamber (36) between the lower cap (52) and the slidable seat (42) biases the slidable seat (42) into contact with the ring portion (34). A floatable ball (40) is placed above the slidable seat (42) and is adapted to fluid tightly seat on and seal off the seat's aperture (44). The floatable ball (40) is sized to freely pass through the hole (38) in the ring portion (34). A vacuum generator (80) is also provided. It has a flow-through channel (84), a junction air channel (88) in communication with the flow-through channel (84) at an upper end and in communication with the channel (74) in the upper cap (72), and an air flow valve (90) with opened and closed positions located downstream of the junction (92) of the air channel.
|
