초록

An improved mechanism is disclosed for use in mounting a door on a pressure vessel for opening and closing movements in a manner permitting minimum clearing distances to be maintained between obstructions and the front or sides of such vessel.

대표청구항 ▼

In a pressure vessel having a side wall and an opening formed in one end of said side wall, a door for closing said opening, said door being characterized as having a cavity intended to face inwardly of said vessel when said door is in closed position and defined by a concave inner surface bounded b

In a pressure vessel having a side wall and an opening formed in one end of said side wall, a door for closing said opening, said door being characterized as having a cavity intended to face inwardly of said vessel when said door is in closed position and defined by a concave inner surface bounded by a locking rim portion, a locking ring mounted on said side wall adjacent said opening for rotation between a locking position, wherein it is adapted to enclose and engage with said locking rim portion for locking said door in said closed position, and a release position, wherein it frees said locking rim portion for movement from within the confines thereof in a direction axially of said one end of said side wall, and means for mounting said door for movement successively between said closed position and a partially open position, wherein said door is spaced axially from said one end of said side wall with said locking rim portion removed from within the confines of said locking ring and said door extends generally transversely of said side wall, and between said partially open position and open position, wherein said inner surface of said door is arranged to face relatively towards said side wall with said door having been swung through an arc of approximately 90 degrees from the position it assumes when in said closed position, the improvement for minimizing the clearance distances between obstructions spaced from said one end of said side wall and transversely of said side wall required to permit movement of said door between said closed and open positions, wherein said means for mounting said door comprise in combination: guide means for guiding said door for movement essentially lengthwise of said side wall between said closed position and said partially open position; a pair of support arms having first and second ends; a pair of control arms having first and second ends; a pair of bearing means for mounting said first ends of said support and control arms for pivotal movement about a pair of parallel axes positionally fixed relative to said side wall and extending transversely thereof; a pair of other bearing means for mounting said second ends of said support and control arms for relative pivotal movement about another pair of parallel axes positionally fixed relative to said door and disposed parallel to the first said pair of axes; means to effect simultaneous relative separating movements of said other bearing means relative to said bearing means for moving said door along said guide means between said closed and partially open positions, said bearing means and said other bearing means associated with said support arms and control arms being spaced apart first and second relative distances when said door is disposed in said closed and partially open positions, respectively, the last said means including means for selectively retaining said bearing means and said other bearing means spaced apart at said second relative distance; and means for moving said door from said partially open position into said open position, as an incidence to which said bearing means and other bearing means are retained in said second relative distance and said first ends of said support and control arms undergo pivotal movement relative to said side wall about the first said pair of axes and said second ends of said support and control arms undergo pivotal movement relative to said door about said other pair of axes.