초록 ▼

A pressure activated safety device includes a body structure defining an internal chamber having a partition movably disposed within the chamber. Pressure from a pipeline, pressure vessel, etc., acts upon the partition and positions it at a locking position preventing a venting seal from being relea

A pressure activated safety device includes a body structure defining an internal chamber having a partition movably disposed within the chamber. Pressure from a pipeline, pressure vessel, etc., acts upon the partition and positions it at a locking position preventing a venting seal from being released. A seal releasing element is movable relative to the body structure and is manually forced into an unlocking position against the bias of pressure acting upon the partition. The partition is pressure responsive such that it is manually movable from the locking position only upon the occurrence of a negligible pressure condition within the pressure chamber, thus providing for movement of a mechanical object only under an internal pressure condition that renders the apparatus safe.

대표청구항 ▼

A pressure activated safety device for mechanical objects, comprising: (a) body means being positioned to restrict movement of a mechanical object and being formed to define a pressure chamber in communication with a source of pressure, said body means further having releasable seal means normally p

A pressure activated safety device for mechanical objects, comprising: (a) body means being positioned to restrict movement of a mechanical object and being formed to define a pressure chamber in communication with a source of pressure, said body means further having releasable seal means normally preventing communication of said pressure chamber and the atmosphere; (b) partition means being movably disposed within said pressure chamber and being positionable at a locking position responsive to pressure within said pressure chamber, said partition means being manually movable from said locking position only upon the occurrence of a negligible pressure condition within said pressure chamber; and (c) unlocking means being movably positioned relative to said body and being engagable with said partition means, said unlocking means being manually movable to an unlocking position only upon movement of said partition means from said locking position by said seal releasing means and at said unlocking position said unlocking means being manually manipulatable to alter said body means thus permitting movement of said mechanical object.