EP0446932A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Inflation device for dilatation catheters
Assignee: Abbott Cardiovascular Systems Inc
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Filing: 1991-03-14
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Granted: —
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Expires: 2011-03-14
Abstract
Abstract The present invention is a fluid injecting device (10). It is comprised of an elongated housing (12) having an inner bore (13) and a piston (16) slidably disposed therein. Attached to the piston (16) is an elongated piston rod (18) one end of which extends out of the housing (12). The rod (18) has a threaded intermediate section which engages a plurality of opposed threaded members. With this construction longitudinal movement of the piston (16) within the bore (13) is effected by rotating the piston rod (18). The invention also includes means to move the opposed threaded members to a second position spaced away from the piston rod (18) and disengaged therefrom. In this fashion longitudinal movement of the piston (16) within the bore (13) is effected by pushing or pulling on the piston rod (18). <IMAGE>
Inventors
- 👤 Christopher A. Tacklind
- 👤 Vae E. Sun
- 👤 Nelson S. Au
- 👤 David L. Karshmer
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 17:00
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/1018; A61M25/10181; A61M25/10182; A61M25/10184; A61M25/10185; A61M25/10187
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
165 words
A fluid injecting device comprising; (a) an elongated housing having an inner bore extending therein; (b) a piston slidably disposed within the bore of the housing; (c) an elongated piston rod having one end secured to the piston and one end extending out of the housing and an intermediate section with threads on the exterior thereof; (d) a plurality of opposed threaded members adapted to engage the threaded section of the piston; and (e) means to move the opposed threaded members to a first position with the threads thereon engaged with the threads on the piston rod so that longitudinal movement of the piston within the bore is effected by rotating the piston rod; and (f) means to move the opposed threaded members to a second position spaced away from the piston rod with the threads thereon disengaged from the threads on the piston rod, so that longitudinal movement of the piston within the bore is effected by pushing or pulling on the piston rod.
Claim 2
Dependent Claim
35 words
The fluid injecting device of claim 1 wherein the means to move the threaded members toward and away from the threaded piston rod is a positioning switch mounted on the open end of the housing.
Claim 3
Dependent Claim
31 words
The fluid injecting device of claim 2 wherein the positioning switch is operated by a cylindrically-shaped sleeve rotatably mounted on the open end of the housing coaxially with the piston rod.
Claim 4
Dependent Claim
79 words
The fluid injecting device of claim 3 wherein the rotatably mounted sleeve is provided with an extension fixed thereto so that the switch can be operated by rotating the, sleeve or the extension connected thereto with the fingers of an operator's hand engaging a handle on the end of the piston rod extending out of the housing wherein the handle secured to the piston rod is generally cup shaped and extends toward the housing exterior to the sleeve extension.
Claim 5
Dependent Claim
68 words
The inflation device of claim 2 wherein the switch includes a split nut having two sections with guide means to maintain the alignment of the section as they move toward and away from each other and wherein the switch means includes a pair of opposed angled spring members having one end fixed to the rotatable sleeve and one end pivotally fixed to a base secured to the housing.
Claim 6
Dependent Claim
30 words
The inflation device of claim 5 wherein the sections of the split nut are rotatably mounted to the angled spring member adjacent to the ends pivotally mounted to the base.
Claim 7
Dependent Claim
50 words
The inflation device of claim 3 wherein the sleeve which is rotatably mounted onto the open end of the housing has opposed guide fingers secured to the inner surface thereof which have free ends adapted to follow arcuate ridges provided in the edge of the open end of the housing.
Claim 8
Dependent Claim
22 words
The inflation device of claim 7 wherein the arcuate ridges have central sections with a smaller radii of curvature than adjacent sections.
Claim 9
Dependent Claim
86 words
The inflation device of claim 5 wherein the end of the angled spring members pivotally mounted to the base are provided with a pivoting post and are generally L-shaped, one end of which is seated in an aperture in the base and the other end of which is seated in a recess provided in the open end of the housing and wherein the L-shaped angled spring members are fixed at one end thereof to opposed locations within the sleeve and extend inwardly beyond the center thereof.
Claim 10
Dependent Claim
74 words
The inflation device of claim 6 wherein each of the split nut sections is provided with a groove on the backside thereof with a flange having an aperture therein extending out from one end thereof and wherein each of the angled spring members are provided with a post adjacent to the pivoted end thereof which is seated within the groove end and which has an extension seated within the aperture provided in the flange.
References Cited (Backward Citations)
No citation records indexed.
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