Safety seal for pressurized system

Details Safety seal for pressurized system Safety seal for pressurized system

1990-05-31

1991-08-06

Marcus, Stephen

Receptacles

Closures

Having means for securing or retaining closure in its closed...

220582, 220240, 220304, 215270, 215330, B65D 4500

Patent

active

050369962

ABSTRACT:
A safety seal for a pressurized system, such as a pressurized oil sprayer used in lubricating engines, or a pressurized paint sprayer, wherein the closure, for an inlet member, for addition of material such as oil or paint, is prevented from being removed, when the system is in the pressurized state. A resilient band, inaccessible from the exterior of the system, is tightly compressed by internal pressurization against an interface between the closure and inlet member thereby locking the closure into a non-removable position. Reduction of internal pressure permits the resilient band to contract away from the interface, thereby unlocking the closure from its non-removable position, with the closure being removable thereafter for addition of material into the inlet.

REFERENCES:
patent: 2938647 (1960-05-01), Cornelius
patent: 4267940 (1981-05-01), Wade
patent: 4515287 (1985-05-01), Baudoux et al.
patent: 4589566 (1986-05-01), Rives et al.
patent: 4700866 (1987-10-01), Taylor
patent: 4936483 (1990-06-01), Ballu

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