Support device and method for a rotary closure assembly
First Claim
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1. An apparatus for locking a closure assembly in a closed position, the apparatus comprising:
- a hub having an opening therethrough;
a head removably attachable to said hub via a lug-type holding arrangement and movable between an open position and a closed position;
a releaseable lock element movable between an unlocked position and a locked position that locks said head in the closed position;
a pressure warning/release device movable between a sealed position and a warning position, and which is operably connected to said locking element so that the pressure warning/release device must be in the warning/release position in order for the locking element to be unlocked; and
a support device comprising a swivel mount housing arranged on said hub and a davit arm mounted in said swivel mount housing and attached to said head at one end, wherein said swivel mount housing is arranged to allow said davit arm to swivel on said hub in a plane and comprises two concave rollers, wherein said davit arm is adapted to cooperate with said concave rollers to allow said davit arm to move in a longitudinal direction in said plane relative to said swivel mount housing and to swivel about said longitudinal direction.
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Abstract
A closure arrangement comprises a hub 314, a head 320 adapted to be disengage able from the hub 314. A davit arm 300 is mounted on a swivel mount 316 provided on the hub 314, and the swivel mount 316 is arranged to allow the davit arm 300 to swivel in a plane. The davit arm is free to move in a longitudinal direction in the plane, and to rotate about the longitudinal direction. The closure arrangement is further provided with an adjustment device adapted to adjust the position of the head 320 relative to the hub 314 in a direction perpendicular to the plane.
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Citations
27 Claims
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1. An apparatus for locking a closure assembly in a closed position, the apparatus comprising:
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a hub having an opening therethrough;
a head removably attachable to said hub via a lug-type holding arrangement and movable between an open position and a closed position;
a releaseable lock element movable between an unlocked position and a locked position that locks said head in the closed position;
a pressure warning/release device movable between a sealed position and a warning position, and which is operably connected to said locking element so that the pressure warning/release device must be in the warning/release position in order for the locking element to be unlocked; and
a support device comprising a swivel mount housing arranged on said hub and a davit arm mounted in said swivel mount housing and attached to said head at one end, wherein said swivel mount housing is arranged to allow said davit arm to swivel on said hub in a plane and comprises two concave rollers, wherein said davit arm is adapted to cooperate with said concave rollers to allow said davit arm to move in a longitudinal direction in said plane relative to said swivel mount housing and to swivel about said longitudinal direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A closure arrangement comprising a hub, a head adapted to be disengageable from said hub, a support device adapted to support said head when separated from said hub, wherein said support device comprises a swivel mount arranged on said hub and a davit arm mounted on said swivel mount and attached at one end to said head, wherein said swivel mount is arranged to allow said davit arm to swivel in a plane, said davit arm is mounted on said swivel mount to move in a longitudinal direction in said plane relative to said swivel mount to swivel about said longitudinal direction, and said support device further comprises an adjustment device adapted to adjust the position of said head relative to said hub in a direction perpendicular to said plane, wherein said adjustment device is adapted to adjust the angle of inclination of said davit arm relative to said hub in order to adjust the position of said head relative to said hub in a direction perpendicular to said plane.
- 13. A closure arrangement comprising a hub, a head adapted to be disengageable from said hub, a support device adapted to support said head when separated from said hub, wherein said support device comprises a swivel mount arranged on said hub and a davit arm mounted on said swivel mount and attached at one end to said head, wherein said swivel mount is arranged to allow said davit arm to swivel in a plane, said davit arm is mounted on said swivel mount to move in a longitudinal direction in said plane relative to said swivel mount to swivel about said longitudinal direction, and said support device further comprises an adjustment device adapted to adjust the position of said head relative to said hub in a direction perpendicular to said plane, wherein the swivel mount comprises two concave rollers, and wherein the adjustment device comprises adjusting means for adjusting the position of at least one said roller.
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15. A method for locking a closure assembly in a closed position for use with a hub having an opening therethrough and a head removably attachable to said hub via a lug-type holding arrangement, the method comprising:
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moving a pressure warning/release device from a sealed position to a warning position, the warning/release device operably connected to a locking device that operates to withdraw a projection from said lug-type holding arrangement, so that said pressure warning/release device must be in a warning position in order for the locking device to be unlocked; and
providing a support device comprising a swivel mount housing on said hub and a davit arm mounted in said swivel mount housing and attached to said head at one end, the method comprising providing said swivel mount housing with two concave rollers, using said swivel mount housing to allow said davit arm to swivel on said hub in a plane, using said concave rollers to allow said davit arm to move in a longitudinal direction in said plane relative to said swivel mount housing and to swivel about said longitudinal direction, the method further comprising displacing said concave rollers along said longitudinal direction, arranging one said concave roller on an uppers side of said davit arm at a position away from said head, and arranging the other said concave roller on a lower side of said davit arm at a position towards said head. - View Dependent Claims (16, 17, 18, 19)
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20. A method of operating a closure assembly comprising providing a hub, a head adapted to be disengageable from said hub, a support device adapted to support said head when separated from said hub, the method comprising providing said support device with a swivel mount arranged on said hub and a davit arm mounted on said swivel mount and attached at one end to said head, using said swivel mount to allow said davit arm to swivel in a plane, using said swivel mount to allow said davit arm to move in a longitudinal direction in said plane relative to said swivel mount, and using said swivel mount to allow said davit arm to swivel about said longitudinal direction, the method further comprising providing said support device with an adjustment device to adjust the position of said head relative to said hub in a direction perpendicular to said plane, using said adjustment device to adjust the angle of inclination of said davit arm relative to said hub in order to adjust the position of said head relative to said hub in a direction perpendicular to said plane.
- 21. A method of operating a closure assembly comprising providing a hub, a head adapted to be disengageable from said hub, a support device adapted to support said head when separated from said hub, the method comprising providing said support device with a swivel mount arranged on said hub and a davit arm mounted on said swivel mount and attached at one end to said head, using said swivel mount to allow said davit arm to swivel in a plane, using said swivel mount to allow said davit arm to move in a longitudinal direction in said plane relative to said swivel mount, and using said swivel mount to allow said davit arm to swivel about said longitudinal direction, the method further comprising providing said support device with an adjustment device to adjust the position of said head relative to said hub in a direction perpendicular to said plane, providing said swivel mount with two concave rollers, and using said adjustment device to adjust the position of at least one said roller.
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23. An apparatus for locking a closure assembly in a closed position for use with a hub having an opening therethrough and a head removably attachable to said hub via a lug-type holding arrangement, the apparatus comprising:
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a releaseable locking means moveable between an unlocked position; and
a locked position which locks said head in a closed position; and
a pressure warning/releasing means moveable between a sealed position and a warning position, said warning means operably connected to said locking means type so that said pressure warning/releasing means must be in a warning/releasing position in order for said locking means to be unlocked;
a support means comprising a swivel mount housing on said hub and a davit arm mounted in said swivel mount housing and attached to said head at one end, wherein said swivel mount housing is arranged to allow said davit arm to swivel on said hub in a plane and comprises two concave rollers, wherein said davit arm is adapted to cooperate with said concave rollers to allow said davit arm to move in a longitudinal direction in said plane relative to said swivel mount housing and to swivel about said longitudinal direction, said concave rollers are displaced along said longitudinal direction to support said davit arm, one said concave roller is arranged on an upper side of said davit arm at a position away from said head, and the other said concave roller is arranged on a lower side of said davit arm at a position towards said head. - View Dependent Claims (24, 25, 26, 27)
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Specification