Extra-high pressure water pump

Details Extra-high pressure water pump Extra-high pressure water pump

1982-01-25

1984-05-15

Smith, Leonard E.

Pumps

Expansible chamber type

Plural pumping members in single pump chamber

417541, 417568, F04B 2104

Patent

active

044485743

ABSTRACT:
An extra-high pressure water pump includes a cylinder barrel, a piston and a pair of double check valves. The piston is composed of a main piston and a lubricating oil piston. The lubricating oil piston has a double piston ring and is slidably mounted on an additional piston rod connected to the main piston head. Lubricating oil is filled in a lubricating oil room made between the main piston and the lubricating oil piston in the cylinder barrel. The pressure between the lubricating oil and water in the pump is naturally kept at the same level by sliding a position of the lubricating oil piston on the additional piston rod, so that a sudden imbalanced pressure between the lubricating oil and the water in the cylinder barrel does not break the lubricating oil piston.
The extra-high pressure water pump supplies extra-high pressured water to its small carriable water jet gun.

REFERENCES:
patent: 1829451 (1931-10-01), McNab
patent: 2330781 (1943-09-01), Langmyhr et al.
patent: 2733664 (1956-02-01), Saalfrank
patent: 3632121 (1972-01-01), Wahlmark
patent: 3767215 (1973-10-01), Brown
patent: 3854735 (1974-12-01), Maurer et al.

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