초록 ▼

Rupturable pressure relief apparatus are provided which are less subject to damage and premature failure as a result thereof and which reliably rupture at very low pressure differentials. The apparatus are adapted to be clamped between conventional pipe flanges or annular support members and are bas

Rupturable pressure relief apparatus are provided which are less subject to damage and premature failure as a result thereof and which reliably rupture at very low pressure differentials. The apparatus are adapted to be clamped between conventional pipe flanges or annular support members and are basically comprised of a first circular rupturable member formed of solid flexible material and a second circular rupturable member also formed of flexible material positioned adjacent the first rupturable member. The second rupturable member includes a solid annular flange portion and a plurality of arcuate slots circumscribing a substantially circular central portion wth rupture tabs between the arcuate slots. Knife means having a cutting edge forming at least a portion of a circle are positioned adjacent the second rupturable member on the side thereof opposite from the first rupturable member so that when the second rupturable member ruptures, the first rupturable member is severed by the knife means. Alternate embodiments add addtional rupturable members and knife means to cause the apparatus to rupture in either directon at low pressure differentials.

대표청구항 ▼

A rupturable pressure relief apparatus which ruptures at a low pressure differential adapted to be sealingly clamped between inlet and outlet annular support members comprising: a first circular rupturable member formed of solid flexible material adapted to be positioned adjacent said inlet annular

A rupturable pressure relief apparatus which ruptures at a low pressure differential adapted to be sealingly clamped between inlet and outlet annular support members comprising: a first circular rupturable member formed of solid flexible material adapted to be positioned adjacent said inlet annular support member; a second circular rupturable member formed of flexible material positioned adjacent said first rupturable member on the opposite side thereof from said inlet support member, said second rupturable member being of a size corresponding with said first rupturable member and including a solid annular flange portion and a plurality of arcuate slots circumscribing a substantially circular central portion with rupture tabs between said arcuate slots; knife means having a cutting edge forming at least a portion of a circle positioned adjacent said second rupturable member on the side thereof opposite from said first rupturable member; and an annular metal protection ring attached to the side of said second rupturable member facing said knife means, said protection ring being of a size such that when said second rupturable member flexes into contact with said cutting edge of said knife means, said protection ring prevents said second rupturable member from being cut by said cutting edge but when said second rupturable member ruptures, said protection ring passes through said knife means.