System for protecting a liquid pump
First Claim
Patent Images
1. A system for protecting a liquid pump, the system comprising:
- a pressure switch connected to a liquid supply inlet of the pump;
an air vent connected to the liquid supply inlet of the pump; and
means for deactivating the pump upon the pressure switch sensing a predetermined pressure at the liquid supply inlet.
4 Assignments
0 Petitions
Accused Products
Abstract
A combined air vent and pressure switch are provided at the inlet of a liquid pump. The air vent is adapted to exhaust air from a supply line, such as a garden hose, and thereby substantially prevent the pump from running dry before water from the hose reaches the inlet. The pressure switch is connected to the motor of the pump and is adapted to signal the motor to stop if the pressure switch senses a low pressure condition at the pump inlet, such as when there is inadequate liquid or no liquid at the pump inlet. The features of the air vent and pressure switch combine to prevent the pump from being damaged by running the pump without adequate liquid supply.
54 Citations
16 Claims
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1. A system for protecting a liquid pump, the system comprising:
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a pressure switch connected to a liquid supply inlet of the pump; an air vent connected to the liquid supply inlet of the pump; and means for deactivating the pump upon the pressure switch sensing a predetermined pressure at the liquid supply inlet. - View Dependent Claims (2, 3, 4, 5)
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- 6. A system as in claim further comprising a housing having a conduit with the pressure switch and air vent connected thereto.
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10. A system for protecting a liquid pump, the system comprising:
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a housing having a liquid conduit, means for connecting the housing to a liquid inlet of the pump, and means for connecting a water supply to the housing; a pressure switch attached to the housing and communicating with the conduit; and an air vent connected to the housing and communicating with the conduit. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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Specification