Multi-pressure injector device
First Claim
1. A multi-pressure injector device, comprising:
- an outer barrel attachable at a distal end thereof to a catheter or other fluid delivery means, and having at its proximal end laterally outwardly extending manual gripping means, the outer barrel enclosing an interior volume fillable with a selected fluid;
an inner barrel/plunger longitudinally slidable in the outer barrel, the inner barrel/plunger having (i) an interior volume in open flow communications with the interior volume of the outer barrel, and (ii) at its proximal end, second laterally outwardly extending manual gripping means; and
a second plunger longitudinally slidable in the inner barrel;
wherein;
the second plunger and the inner barrel/plunger are independently translatable relative to one another;
the inner barrel/plunger and the outer barrel comprise locking means for selectively longitudinally locking the inner barrel/plunger and outer barrel relative to one another within the outer barrel, to preclude longitudinal translation therebetween, the inner barrel/plunger and outer barrel being selectively longitudinally lockable relative to one another along substantially the entire length of travel of the inner barrel/plunger in the outer barrel;
the second plunger is longitudinally slidable in the inner barrel/plunger while the inner barrel/plunger and outer barrel are locked relative to one another by said locking means;
the inner locking means is characterized in that the barrel/plunger comprises on an exterior surface thereof a track portion extending along substantially the entire length of the exterior surface, and wherein the outer barrel comprises, on an inner surface thereof, along a proximal portion of the interior surface, a track portion which is complementarily configured relative to the track portion on the outer wall of the inner barrel/plunger, for mating therewith, when the respective tracks on the outer barrel inner surface and inner barrel/plunger outer surface are brought into engagement with one another; and
the track portion on the outer surface of the inner barrel/plunger may be selectively engaged with or disengaged from the track portion on the inner wall of the outer barrel, by selective rotation of the inner barrel/plunger relative to the outer barrel, such that when the respective track portions on the inner barrel/plunger and outer barrel are not in engagement, the inner barrel/plunger is freely longitudinally slidable in the outer barrel.
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Accused Products
Abstract
A multi-pressure injector device, having utility as an angiographic syringe or as an inflation device for balloon angioplasty, wherein an inner barrel/plunger is reposed slidably reposed in an outer barrel, with a second plunger slidably reposed in the inner barrel/plunger, and with the inner barrel/plunger and outer barrel being selectively longitudinally lockable relative to one another along the length of travel of the inner barrel/plunger in the outer barrel. A quick-lock/release structure is disclosed, which is particularly suitable for use with inflation devices for balloon angioplasty. In one aspect, the injector comprises a rotatable connector which is mounted at a distal end of the injector, and includes a distal threaded neck portion and a proximal collar portion of greater diameter than the injector barrel. Such rotatable connector construction facilitates ease of use in attaching the injector to complementary matable structure of catheters, manifolds, and other fluid delivery means.
224 Citations
26 Claims
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1. A multi-pressure injector device, comprising:
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an outer barrel attachable at a distal end thereof to a catheter or other fluid delivery means, and having at its proximal end laterally outwardly extending manual gripping means, the outer barrel enclosing an interior volume fillable with a selected fluid; an inner barrel/plunger longitudinally slidable in the outer barrel, the inner barrel/plunger having (i) an interior volume in open flow communications with the interior volume of the outer barrel, and (ii) at its proximal end, second laterally outwardly extending manual gripping means; and a second plunger longitudinally slidable in the inner barrel; wherein; the second plunger and the inner barrel/plunger are independently translatable relative to one another; the inner barrel/plunger and the outer barrel comprise locking means for selectively longitudinally locking the inner barrel/plunger and outer barrel relative to one another within the outer barrel, to preclude longitudinal translation therebetween, the inner barrel/plunger and outer barrel being selectively longitudinally lockable relative to one another along substantially the entire length of travel of the inner barrel/plunger in the outer barrel; the second plunger is longitudinally slidable in the inner barrel/plunger while the inner barrel/plunger and outer barrel are locked relative to one another by said locking means; the inner locking means is characterized in that the barrel/plunger comprises on an exterior surface thereof a track portion extending along substantially the entire length of the exterior surface, and wherein the outer barrel comprises, on an inner surface thereof, along a proximal portion of the interior surface, a track portion which is complementarily configured relative to the track portion on the outer wall of the inner barrel/plunger, for mating therewith, when the respective tracks on the outer barrel inner surface and inner barrel/plunger outer surface are brought into engagement with one another; and the track portion on the outer surface of the inner barrel/plunger may be selectively engaged with or disengaged from the track portion on the inner wall of the outer barrel, by selective rotation of the inner barrel/plunger relative to the outer barrel, such that when the respective track portions on the inner barrel/plunger and outer barrel are not in engagement, the inner barrel/plunger is freely longitudinally slidable in the outer barrel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. An inflation device, comprising:
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a barrel having a distal end attachable to a catheter or other fluid delivery means, the barrel enclosing an interior volume fillable with a selected fluid; a plunger longitudinally slidable in the barrel, with an external surface having a track portion thereon extending longitudinally along the plunger; a slot in a proximal portion of the barrel, extending therethrough; a locking and release structure comprising an annular ring mounted on the barrel on an external surface thereof and having a first engagement member extending along a circumferential path having a progressively varying radial position along its circumferential extent, a locking element comprising a second engagement member lockingly engageable with the first engagement member on the annular ring, said locking element extending through the slot in the barrel radially inwardly into the interior volume and having an engagement surface on a radially innermost portion thereof, operatively arranged so that (1) the locking element engagement surface engages the track portion on the plunger, when the ring is selectively positioned so that the locking element is directed radially inwardly to a maximum extent, and (2) the locking element is released from its locked position having the engagement surface thereof in engagement with the track portion on the plunger, when the ring is selectively rotated away from said selective position. - View Dependent Claims (25, 26)
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Specification