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US 6,283,727 B1Granted
Metering pump
AssigneeMilton Bay
InventorsDavid M. Borish, Robert F. Bean, Richard J. Caspar
Life of this patent
Estimating the term…
Abstract
The compact, easily useable metering pump results from a structure including a housing (20) with a pumping chamber (34) within the housing (20). A diaphragm (36) is located in the pumping chamber (34). An inlet includes a check valve (50) for allowing fluid to flow to one side of the diaphragm (36) but not the reverse and an outlet including a check valve (56) allows fluid to flow from the pumping chamber (34) but not into it. A pneumatically operated hydraulic pump (16) is located in the housing (20) and cycles the diaphragm (36).
Claims15
A metering pump, comprising
- a housing;
- a pumping chamber within said housing;
- a diaphragm movable in said pumping chamber and separating the pumping chamber into a pumping side for receiving and discharging fluid to be pumped and a pressurizing side for receiving hydraulic oil under pressure to move the diaphragm;
- an inlet to said pumping side including a check valve for allowing a fluid to be pumped to flow into said pumping side and preventing flow from said pumping side through said inlet;
- an outlet from said pumping side including a check valve for allowing a fluid to be pumped to flow from said pumping side and preventing flow into said pumping side through said outlet;
- a hydraulic pump in said housing and having an actuating side and a hydraulic piston containing, hydraulic side;
- a port connecting said hydraulic side to said pressurizing side;
- a hydraulic oil reservoir in said housing and in fluid communication with said hydraulic side;
- and
- a bypass device in said housing and connected to said port and operable upon operation of said piston to receive a predetermined amount of hydraulic oil.
7 more elements
A metering pump, comprising
- a housing;
- a pumping chamber within said housing;
- a diaphragm movable in said pumping chamber and separating the pumping chamber into a pumping side for receiving and discharging fluid to be pumped and a pressurizing side for receiving hydraulic oil under pressure to move the diaphragm;
- an inlet to said pumping side including a check valve for allowing a fluid to be pumped to flow into said pumping side and preventing flow from said pumping side through said inlet;
- an outlet from said pumping side including a check valve for allowing a fluid to be pumped to flow from said pumping side and preventing flow into said pumping side through said outlet;
- a hydraulic pump in said housing including a sleeve removably received in a cavity within said housing and having a bore, a piston reciprocally mounted in said bore and an actuator for reciprocating said piston;
- a port connecting said hydraulic pump bore to said pressurizing side;
- and
- a hydraulic oil reservoir in said housing and in fluid communication with said bore.
6 more elements
A metering pump, comprising
- a housing;
- a pumping chamber within said housing;
- a diaphragm movable in said pumping chamber and separating the pumping chamber into a pumping side for receiving and discharging fluid to be pumped and a pressurizing side for receiving hydraulic oil under pressure to move the diaphragm;
- an inlet to said pumping side including a check valve for allowing a fluid to be pumped to flow into said pumping side and preventing flow from said pumping side through said inlet;
- an outlet from said pumping side including a check valve for allowing a fluid to be pumped to flow from said pumping side and preventing flow into said pumping side through said outlet;
- a first cavity in said housing;
- a pneumatically operated hydraulic pump in said housing and having a pneumatic side and a hydraulic side, said hydraulic side including sleeve with an elongated bore removably secured in said first cavity and a hydraulic piston reciprocally received in said bore and operated by said pneumatic side;
- a port connecting said hydraulic side bore to said pressurizing side;
- a hydraulic oil reservoir in said housing and in fluid communication with said hydraulic side bore;
- an inlet for a pneumatic fluid connected to said pneumatic side;
- a bypass device in said housing and connected to said port and operable upon operation of said piston to receive a predetermined amount of hydraulic oil;
- a second cavity in said housing and connected to said port;
- a pressure relief valve in said second cavity;
- and
- an additional port in said housing and connecting said pressure relief valve to said reservoir.
12 more elements
Dependencies are inferred from the claim text.