초록 ▼

A guide plate for a lug type closure arrangement is provided with a stepped profile to aid a user move the head of the closure arrangement relative to the hub from a locked to an unlocked position. A marker pin is provided to align with the guide plate at various stages in the unlocking sequence. Th

A guide plate for a lug type closure arrangement is provided with a stepped profile to aid a user move the head of the closure arrangement relative to the hub from a locked to an unlocked position. A marker pin is provided to align with the guide plate at various stages in the unlocking sequence. The relative positions of the marker pin and the guide plate indicate to the user the relative positions of the lugs on the head and the lugs on the hub.

대표청구항 ▼

1. A lug type closure arrangement comprising a hub, a head adapted to be disengageable from said hub in a locked position to an unlocked position by a sequence of relative rotational and translational movements, a guide plate attached to the lug type closure arrangement to aid a user perform said se

1. A lug type closure arrangement comprising a hub, a head adapted to be disengageable from said hub in a locked position to an unlocked position by a sequence of relative rotational and translational movements, a guide plate attached to the lug type closure arrangement to aid a user perform said sequence of relative rotational and translation movements, wherein the guide plate comprises a cascading, stepped profile comprising a first stepped portion and a second stepped portion, an arm coupled to the hub and the head, wherein the arm extends from the hub to the head and is connected to the head via a screw thread, and a rotatable handle connected to the screw thread,wherein the handle rotates to lift or lower the head on the screw thread. 2. A lug type closure arrangement according to claim 1, wherein said guide plate is attached to said hub and associated with a marker on said head, wherein said marker is adapted to align with predetermined positions of said guide plate at predetermined stages in said sequence of relative rotational and translational movements.3. A lug type closure arrangement according to claim 2, wherein the marker comprises a radially outwardly projecting pin.4. A method of opening a closure arrangement, the closure arrangement comprising a hub and a head adapted to be rotatable relative to the hub, an arm coupled to the hub and the head, wherein the arm extends from the hub to the head and is connected to the head via a screw thread, and a rotatable handle connected to the screw thread, wherein the handle rotates to lift or lower the head on the screw head the method comprising providing a guide plate to guide a user to perform a sequence of relative rotational and translation movements in order move the head from a locked to an unlocked position, wherein the guide plate comprises a cascading, stepped profile comprising a first stepped portion and a second stepped portion.5. A method according to claim 4, wherein said guide plate is provided on said hub, further comprising providing a marker on said head, and aligning said marker with predetermined positions of said guide plate at predetermined stages in the opening sequence of said closure.6. A method according to claim 5, further comprising using a radially outwardly projecting pin as said marker.7. A closure arrangement comprising:a hub comprising at least one first type of lug projecting from the hub; a head adapted to be rotatable relative to said hub, the said head comprising at least one stepped second type of lug and at least one third type of lug projecting from said head, wherein the or each stepped second type of lug is situated adjacent a single third type of lug, wherein the or each stepped second type of lug is arranged to provide a stepped profile relative to the adjacent third type of lug, wherein said head is arranged to be in a first position when the or each stepped second type of lug and the or each third type of lug are arranged so as to not interfere with a corresponding first type of lug, wherein said head is arranged to be in a second position when the or each stepped second type of lug at least partially overlaps in an axially direction with a corresponding first type of lug, wherein said head is arranged to be in a third position when the or each stepped second type of lug contacts a corresponding first type of lug, and wherein said head is arranged to be in a fourth position when the or each stepped second type of lug and the or each third type of lug are arranged so as to at least partially overlap in an axial direction with a corresponding first type of lug; a marker; a guide plate having a stepped profile, wherein said marker and said guide plate are adapted to aid a user perform a sequence of relative rotational and translation movements that is required to move said head from the fourth position to the first position via the third and second positions, wherein the guide plate comprises a cascading stepped profile comprising a first stepped portion and a second stepped portion; an arm coupled to the hub and the head, wherein the arm extends from the hub to the head and is connected to the head via a screw thread; and a rotatable handle connected to the screw thread, wherein the handle rotates to lift or lower the head on the screw head. 8. A closure arrangement according to claim 7, wherein said guide plate comprises a first portion, a stepped second portion, and a third portion.9. A closure arrangement according to claim 8, wherein said marker is adapted to contact said first portion of said guide plate when the closure arrangement is in the third position, wherein said marker is adapted to be located just above said stepped second portion of said guide plate when the closure arrangement is in the second position, and wherein said marker is adapted to contact said second portion of said guide plate when the closure arrangement is in the first position.10. A closure arrangement according to claim 9, wherein said guide plate is attached to said hub.11. A closure arrangement according to claim 10, wherein said marker comprises a radially outwardly projecting pin attached to said head.12. A closure arrangement according to claim 9, wherein said guide plate is attached to said head.13. A closure arrangement according to claim 12, wherein said marker comprises a radially outwardly projecting pin attached to said hub.14. A closure arrangement according to claim 8, wherein said guide plate is attached to said hub.15. A closure arrangement according to claim 14, wherein said marker comprises a radially outwardly projecting pin attached to said head.16. A closure arrangement according to claim 8, wherein said guide plate is attached to said head.17. A closure arrangement according to claim 16, wherein said marker comprises a radially outwardly projecting pin attached to said hub.18. A closure arrangement according to claim 7, wherein said guide plate is attached to said hub.19. A closure arrangement according to claim 18, wherein said marker comprises a radially outwardly projecting pin attached to said head.20. A closure arrangement according to claim 7, wherein said guide plate is attached to said head.21. A closure arrangement according to claim 20, wherein said marker comprises a radially outwardly projecting pin attached to said hub.22. A method of opening a closure arrangement according to claim 7, comprising;rotating said head relative to said hub until there is contact between said marker and a first portion of said guide plate; moving said head in an outer axial direction relative to said hub until said marker is located just away from a second stepped portion of said guide plate; rotating said head relative to said hub until there is contact between said marker and a third portion of said guide plate; and moving said head in the outer axial direction relative to said hub until said head is separated from said hub.