초록 ▼

A surge control fluid delivery system is described particularly adapted for pumping of high-viscosity substances from a reservoir for dispensing. The system includes a manifold which is connected to an outlet line of a pump. A vent circuit for returning fluid from the manifold to the reservoir is al

A surge control fluid delivery system is described particularly adapted for pumping of high-viscosity substances from a reservoir for dispensing. The system includes a manifold which is connected to an outlet line of a pump. A vent circuit for returning fluid from the manifold to the reservoir is also provided. Surge control is achieved through a control system which modulates the fluid supply pump and further activates a valve in the vent return line to maintain the pressure of the fluid within the manifold to within adjustable upper and lower limits. The system further includes means for automatically switching from one source of fluid to another upon depletion of the first source.

대표청구항 ▼

A fluid supply system for controlling the pressure of fluid delivered from a fluid reservoir, comprising: means for pumping the fluid from the reservoir, a manifold, pump outlet means communicating said pumping means with said manifold, outlet means communicating with said manifold for discharging t

A fluid supply system for controlling the pressure of fluid delivered from a fluid reservoir, comprising: means for pumping the fluid from the reservoir, a manifold, pump outlet means communicating said pumping means with said manifold, outlet means communicating with said manifold for discharging the fluid, vent return means communicating said manifold with the reservoir for returning the fluid from said manifold to the reservoir, high pressure sensing means communicating with said manifold, said high pressure sensing means having a sensing threshold, low pressure sensing means communicating with said manifold, said low pressure sensing means having a sensing threshold which is less than said sensing threshold of said high pressure sensing means, control means for said pumping means for energizing said pumping means in response to said low pressure sensing means when the pressure of the fluid in said manifold falls below said low pressure sensing means threshold, whereby the pressure of said fluid in said manifold is increased to above said low pressure sensing means threshold, and vent control means for closing said vent return means and opening said vent return means in response to said high pressure sensing means when the pressure of the fluid in said manifold exceeds said high pressure sensing means threshold, whereby the pressure of said fluid in said manifold is decreased to below said high pressure sensing means threshold wherein when the pressure sensed in said manifold is between said high and low pressure sensing means thresholds, said pumping means is deenergized and said vent return means is closed.