초록 ▼

A dispenser for ejecting a volume of fluid. The dispenser is adapted for connection thereof in a system for supplying fluid under pressure thereto for charging it with fluid to be dispensed. A system for delivery of the volume of fluid ejected by the dispenser includes a discharge valve adapted to b

A dispenser for ejecting a volume of fluid. The dispenser is adapted for connection thereof in a system for supplying fluid under pressure thereto for charging it with fluid to be dispensed. A system for delivery of the volume of fluid ejected by the dispenser includes a discharge valve adapted to be closed for the charging of the dispenser and to be opened for ejecting the volume. An energy accumulator for accumulating energy for actuating the dispenser to eject the volume of fluid is accumulative of the dispenser-actuable energy in response to the supplying of fluid under pressure to the dispenser for charging it.

대표청구항 ▼

[ What is claimed is:] [1.]1. Fluid dispensing apparatus comprising an expansible chamber device having a member movable therein between a rearward retracted position and a forward position, said movable member having a rearward side and a forward side, said device with said movable member therein d

[ What is claimed is:] [1.]1. Fluid dispensing apparatus comprising an expansible chamber device having a member movable therein between a rearward retracted position and a forward position, said movable member having a rearward side and a forward side, said device with said movable member therein defining on the forward side of said member an expansible and contractible chamber adapted by movement of the member to its rearward retracted position to be charged with fluid to be dispensed;said device being adapted for connection thereof in a system for the supplying of fluid under pressure to said chamber, the pressurized fluid supplied to the chamber being operable to move said member to its said retracted rearward position thereby to expand and load said chamber;a system for ejection of fluid on forward movement of said movable member including a discharge valve adapted to be closed for charging said chamber with fluid and to be opened for ejection of fluid by forward movement of said movable member;and an energy accumulator for accumulating energy for moving said member forward through a delivery stroke, said accumulator being accumulative of said member-actuable energy in response to the supplying of fluid under pressure to said chamber; a second expansible and contractible chamber on the rearward side of said movable member, said accumulator comprising a hollow body having a movable separator therein separating the space therein into an expansible and contractible gas chamber on one side of said movable separator and an expansible and contractible hydraulic fluid chamber on the other side of said movable separator, said gas chamber being charged with gas under pressure, said hydraulic fluid chamber being in communication with said second chamber via hydraulic fluid passaging in said body, and said hydraulic fluid chamber, said hydraulic fluid passaging and said second chamber being charged with hydraulic fluid, said hydraulic fluid being pressurized on rearward movement of said movable member to its retracted position thereby to move said separator further to pressurize the gas in said gas chamber, the further pressurized gas providing energy for application through the hydraulic fluid to move the said movable member forward through a delivery stroke.