Vacuum system

Details Vacuum system Vacuum system

1975-05-12

1977-11-01

Freeh, William L.

Pumps

One fluid pumped by contact or entrainment with another

Jet

92 7, F04F 552

Patent

active

040563340

ABSTRACT:
A vacuum pump having a mechanically operated plunger or piston which is so arranged as to either fully open or fully close a supply of compressed gas. The compressed gas flows through a venturi tube to create a vacuum. This vacuum in turn causes the atmospheric pressure to urge the plunger against a spring force to close the connection between the compressed gas and the venturi tube. This will maintain the vacuum pressure between two predetermined limits. As soon as the pressure in the vacuum chamber rises above a predetermined value the compressed gas supply is opened again to reduce the gas pressure in the vacuum chamber. There are also disclosed a new desoldering tool, a power cylinder, clamping fixtures and suction cups operable with the vacuum pump of the invention.

REFERENCES:
patent: 1014729 (1912-01-01), Thurman et al.
patent: 1265928 (1918-05-01), McClymont
patent: 1357960 (1920-11-01), Cruse
patent: 1421841 (1922-07-01), Schmidt
patent: 1441651 (1923-01-01), Anderson et al.
patent: 2043027 (1936-06-01), Beede
patent: 2457388 (1948-12-01), Lung
patent: 3055225 (1962-09-01), Miller
patent: 3435841 (1969-04-01), Williams et al.
patent: 3765505 (1973-10-01), Pendleton

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