Latching blocking mechanisms and safety medical needle assemblies
First Claim
1. A latching blocking mechanism, comprising:
- a static component including an elongate guide;
a static abutment surface;
a movable component slidable along the guide between initial and shifted positions;
a control member arranged for movement with the movable component in the sliding direction thereof but displaceable with respect thereto in a direction transverse to the sliding direction of the movable component, the control member initially being disposed at a first position relative to the movable component;
control means arranged to urge the control member transversely towards a second position from the first position, which control means becomes active only after the control member has moved by a predetermined distance from its first position towards its second position; and
a static camming part co-operable with a moving camming part on the control member and arranged to move the control member through said predetermined distance from its first position on movement of the movable component from its initial position towards its shifted position;
whereby following the movement of the control member through said predetermined distance and the return of the movable component towards its initial position, the control member is driven by the control means to a blocking position between the static abutment surface and the movable component thereafter to block further movement of the movable component towards its shifted position.
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Accused Products
Abstract
A latching blocking mechanism includes a static component (10,50), a movable component (14,52) slidable relative to the static component and a control member (21,58) arranged to slide with the movable component (14,52) but displaceable transversely or rotationally with respect to the movable component. After the control member (21,58) has moved from a first position through a pre-determined distance towards a second position, a spring (F,60) becomes active to urge the control member to its second position. Sliding movement of the movable component (14,52) displaces the control member (21,58) in the sliding direction to interengage respective camming parts (12,25) on the static component (10,50) and control member (21,58) thereby to displace the control member transversely through said pre-determined distance. Return of the movable component (14,52) to its initial position allows the control member (21,58) to move to its second position under the action of the spring (F,60) thereafter to block movement of the movable component away from its initial position.
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Citations
47 Claims
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1. A latching blocking mechanism, comprising:
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a static component including an elongate guide;
a static abutment surface;
a movable component slidable along the guide between initial and shifted positions;
a control member arranged for movement with the movable component in the sliding direction thereof but displaceable with respect thereto in a direction transverse to the sliding direction of the movable component, the control member initially being disposed at a first position relative to the movable component;
control means arranged to urge the control member transversely towards a second position from the first position, which control means becomes active only after the control member has moved by a predetermined distance from its first position towards its second position; and
a static camming part co-operable with a moving camming part on the control member and arranged to move the control member through said predetermined distance from its first position on movement of the movable component from its initial position towards its shifted position;
whereby following the movement of the control member through said predetermined distance and the return of the movable component towards its initial position, the control member is driven by the control means to a blocking position between the static abutment surface and the movable component thereafter to block further movement of the movable component towards its shifted position.
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2-29. -29. (canceled)
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30. A safety medical needle assembly, comprising:
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a tubular component including an internal elongate guide;
an abutment surface formed on the tubular component;
a movable component disposed within the tubular component and arranged for axial sliding movement with respect thereto between initial and shifted positions, the movable component being adapted to receive the hub of a medical needle so that the needle projects within but is protected by the movable component when in its initial position;
a control member arranged for axial movement with the movable component but rotatable with respect to the movable component, the control member initially being disposed at a first position relative to the movable component;
control means arranged to urge the control member towards a second position angularly displaced from the first position, which control means becomes active only after the control member has turned through a predetermined angle towards the second position; and
a camming part on the tubular component co-operable with a moving camming part on the control member and arranged to turn the control member through said predetermined angle from its first position on axial movement of the movable component towards its shifted position to cause the needle to project from the movable component;
whereby the movement of the movable component towards its shifted position to cause the needle to project therefrom also causes the control member to turn through said predetermined angle whereafter the return of the movable component towards its initial position allows the control member to move behind the abutment surface under the action of the control means, thereafter to block further axial movement of the movable component towards its shifted position. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47)
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Specification