Fluid handling – Destructible or deformable element controlled – Destructible element
Reexamination Certificate
2005-10-18
2005-10-18
Rivell, John (Department: 3753)
Fluid handling
Destructible or deformable element controlled
Destructible element
C220S089200
Reexamination Certificate
active
06955182
ABSTRACT:
A relief valve includes an outlet and a cavity with a barb formed on an inner surface. An insert pressed into the cavity includes an inlet in communication with the contents of a pressurized container. A frangible member is trapped within the cavity by the insert and separates the inlet and outlet. The insert defines an area of pressure acting on the frangible member from the pressurized container. The frangible member bursts in response to a desired pressure within the pressurized container. The insert is fabricated from a plastic material with a high resistance to plastic deformation. The insert is held within the cavity by a plurality of barbs that prevent removal. Removal of the insert is only possible by destroying the insert, thereby evidencing modification.
REFERENCES:
patent: 1606831 (1926-11-01), Ford
patent: 2178686 (1939-11-01), Georgiev
patent: 2487104 (1949-11-01), Cooper
patent: 2582171 (1952-01-01), Simpson
patent: 2691459 (1954-10-01), Whitmore
patent: 2701075 (1955-02-01), Coffman
patent: 2958184 (1960-11-01), Sanders
patent: 3064854 (1962-11-01), Miller
patent: 3228334 (1966-01-01), Oss
patent: 3356257 (1967-12-01), Eimer
patent: 4142940 (1979-03-01), Modolell et al.
Siimes Thomas S.
Siimes Timo
Carlson & Gaskey & Olds
Rivell John
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