Constant pressure pressurizing water pump

Details Constant pressure pressurizing water pump Constant pressure pressurizing water pump

2011-01-25

2011-01-25

Kramer, Devon C (Department: 3746)

Pumps

Condition responsive control of pump drive motor

Responsive to accumulation of pumped liquid in receiver

C417S044200

Reexamination Certificate

active

07874810

ABSTRACT:
A water pressurizing pump includes a pump mounted in a compartment of a water tank for pressurizing and outputting water. The compartment is sealed by a cover having a first channel in communication between the compartment and a water supply coupler and a second channel having an end in communication with the first channel. A pressure tank is mounted to the other end of the second channel of the cover. A differential pressure valve unit is slideably mounted in the pressure tank adjacent to the second channel. The differential pressure valve unit is movable by the high water pressure in the second channel to allow water from the second channel to enter the pressure tank.

REFERENCES:
patent: 3922111 (1975-11-01), Deters
patent: 4247260 (1981-01-01), Schonwald et al.
patent: 4659291 (1987-04-01), Valdes
patent: 5190443 (1993-03-01), Valdes
patent: 5771921 (1998-06-01), Johnson
patent: 5947690 (1999-09-01), Snel et al.
patent: 6227241 (2001-05-01), Snel et al.
patent: 6305416 (2001-10-01), Snel et al.

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