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US 4,371,315 AGranted
Pressure booster system with low-flow shut-down control
AssigneeInternational Telephone and Telegraph Corporation
InventorSatoru Shikasho
Life of this patent
Estimating the term…
Abstract
An improved pressure booster system includes a control circuit which senses the temperature at the inlet and outlet of the system and shuts-down a booster pump when the temperature differential between the inlet and outlet exceeds a predetermined level.
Claims13
A water pressure booster system comprising:
- a suction header in fluid communication with a source of water;
- a discharge header in fluid communication with a fluid distribution system;
- a least one pressure booster pump having a suction inlet coupled to said suction header and a discharge outlet coupled to said discharge header;
- control means for energizing and deenergizing said pump;
- said control means comprising a temperature header coupled between said pump discharge outlet and said suction header, first means for sensing the fluid temperature in said temperature header, second means for sensing the temperature of fluid supplied to said suction header, differential temperature control means for generating a first control signal when the temperature differential between said first and second sensing means is a predetermined level, and means responsive to said first signal for de-energizing said pump.
2 more elements
A water pressure booster system comprising a suction header in fluid communication with a source of water;
- a discharge header in fluid communication with a fluid distribution system;
- at least one pressure booster pump having a suction inlet coupled to said suction header, and a discharge outlet coupled to said discharge header;
- control means for energizing and de-energizing said pump;
- said control means comprising a first means for sensing the temperature of fluid discharged by said pump, a second means for sensing the temperature of fluid supplied to said suction header, and differential temperature control means for deenergizing said motor when the temperature differential between said first and second sensing means exceeds a predetermined level.
1 more element
A water pressure booster system comprising:
- a suction header in fluid communication with a source of water;
- a discharge header in fluid communication with a distribution system;
- a plurality of pressure booster pumps each having a suction inlet coupled to said suction header and a discharge outlet coupled to said discharge header;
- control means for selectively energizing and deenergizing said pumps;
- said control means comprising a temperature header having an outlet connected to said suction header and an inlet in fluid communication with the discharge outlets of said plurality of pumps, first means for sensing the temperature of fluid in said temperature header, second means for sensing the temperature of fluid supplied to said suction header, and differential temperature control means for deenergizing said plurality of pumps when the temperature differential between said first and second sensing means reaches a predetermined level.
2 more elements
Dependencies are inferred from the claim text.