Patent US3124635A successfully refreshed from Google Patents.
Patent US5284480A successfully refreshed from Google Patents.
US5284480A
Expired / Lapsed
US
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Inflation/deflation syringe with threaded plunger
Assignee: Medtronic Inc
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Filing: 1993-01-22
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Granted: 1994-02-08
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Expires: 2013-01-22
Abstract
Abstract An inflation device is disclosed for inflation of a balloon of a balloon catheter. A housing defines a fluid-receiving reservoir in fluid communication with the balloon and an interior space for completely receiving a pressure gauge which accesses the fluid for measurement of the pressure within the system. The reservoir has a piston and threaded plunger extending from a proximal opening in the reservoir. The threaded plunger is selectively engaged by a biased rotatable arm on the housing. The piston and plunger are part of a syringe received within the reservoir, and the housing defines an aperture for visual readout of the level of liquid in the reservoir. The pressure gauge contains a Bourdon tube and further contains a gauge fluid in communication with the tube. The means for isolating the inflation fluid from the gauge is an expandable bladder disposed in the neck between the gauge and the inflation fluid so that the bladder expands upon increased fluid pressure within the closed system to create a pressure readout. The housing defines an aperture for visual readout of a timer in the form of an LCD display with a frontally-illuminated screen. The timer has a manual activation lever and the housing includes an aperture allowing manual activation of the lever.
Inventors
- 👤 William M. Porter
- 👤 Susan L. Stout
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:31
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/1018; A61M25/10181; A61M25/10182; A61M25/10184; A61M25/10187
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
169 words
A device for inflating the balloon of a balloon catheter comprising: a longitudinally-extending housing defining a fluid-receiving reservoir and having a proximal and a distal end, means for connecting the housing to the catheter so that the reservoir is in fluid communication with the balloon of the catheter; a piston movable within the reservoir to eject fluid from the reservoir into the catheter; a plunger attached to the proximal end of the piston, the plunger having a threaded portion; threaded means for engaging the threaded portion of the plunger, said means moveable between an engaged and a disengaged position; an arm having a proximal and distal end and extending longitudinally with respect to the housing, said arm rotatably attached to the housing at its distal end and attached to the threaded means at the proximal end, so that movement of the proximal end of the arm moves the threaded means between an engaged and a disengaged position; and a biasing means for biasing the threaded means into engaged position.
Claim 2
Independent Claim
169 words
A device for inflating the balloon of a balloon catheter comprising: a longitudinally-extending housing defining a fluid-receiving reservoir and having a proximal and a distal end, means for connecting the housing to the catheter so that the reservoir is in fluid communication with the balloon of the catheter; a piston movable within the reservoir to eject fluid from the reservoir into the catheter; a plunger attached to the proximal end of the piston, the plunger having a threaded portion; threaded means for engaging the threaded portion of the plunger, said means moveable between an engaged and a disengaged position; an arm having a proximal and distal end and extending longitudinally with respect to the housing, said arm rotatably attached to the housing at its distal end and attached to the threaded means at the proximal end, so that movement of the proximal end of the arm moves the threaded means between an engaged and a disengaged position; and a biasing means for biasing the threaded means into engaged position.
Claim 3
Dependent Claim
14 words
A device according to claim 1 and wherein the threaded means includes buttress threads.
Claim 4
Dependent Claim
22 words
A device according to claim 2 and wherein the housing contains a pressure gauge for measuring the fluid pressure in the catheter.
Claim 5
Dependent Claim
116 words
A device according to claim 3 wherein the pressure gauge is a bourdon-type pressure gauge received within the housing and having a neck, the entrance to which accesses the fluid for pressure measurement, the device further comprising: a liquid contained within the pressure gauge and neck so that the gauge reflects the pressure on the liquid; and an elastomer bladder sealed around the entrance to the neck so as to isolate the liquid from the fluid within the reservoir and exert pressure upon the liquid in response to pressure from the fluid to actuate the gauge, the bladder in shape of bubble disposed within the neck at rest and extending further within the neck under pressure.
Claim 6
Dependent Claim
13 words
A device according to claim 1 and wherein the housing contains a timer.
Claim 7
Independent Claim
174 words
A device for inflating the balloon of a balloon catheter comprising: a housing defining a fluid-receiving reservoir; means for connecting the housing to the catheter so that the reservoir is in fluid communication with the balloon of the catheter; a piston movable within the reservoir to eject fluid from the reservoir into the catheter; a plunger attached to the proximal end of the piston, the plunger defining buttress threads; threaded means for engaging the plunger, said means having buttress threads complementary to the buttress threads of the plunger and movable between an engaged and a disengaged position; means for moving the threaded means between an engaged and a disengaged position; wherein the means for moving the threaded portion is an arm rotatably attached to the housing at its distal end, the arm attached to the threaded means at its proximal end and adapted for transverse movement with respect to the plunger so that movement of the arm engages or disengages the threaded means; and a biasing means for biasing the arm into engaged position.
Claim 8
Independent Claim
174 words
A device for inflating the balloon of a balloon catheter comprising: a housing defining a fluid-receiving reservoir; means for connecting the housing to the catheter so that the reservoir is in fluid communication with the balloon of the catheter; a piston movable within the reservoir to eject fluid from the reservoir into the catheter; a plunger attached to the proximal end of the piston, the plunger defining buttress threads; threaded means for engaging the plunger, said means having buttress threads complementary to the buttress threads of the plunger and movable between an engaged and a disengaged position; means for moving the threaded means between an engaged and a disengaged position; wherein the means for moving the threaded portion is an arm rotatably attached to the housing at its distal end, the arm attached to the threaded means at its proximal end and adapted for transverse movement with respect to the plunger so that movement of the arm engages or disengages the threaded means; and a biasing means for biasing the arm into engaged position.
Claim 9
Dependent Claim
22 words
A device according to claim 7 and wherein the housing contains a pressure gauge for measuring the fluid pressure in the catheter.
Claim 10
Dependent Claim
118 words
A device according to claim 7 and wherein the pressure gauge is a bourdon-type pressure gauge received within the housing and having a neck, the entrance to which accesses the fluid for pressure measurement, the device further comprising: a liquid contained within the pressure gauge and neck so that the gauge reflects the pressure on the liquid; and an elastomeric bladder sealed around the entrance to the neck so as to isolate the liquid from the fluid within the reservoir and exert pressure upon the liquid in response to pressure from the fluid to actuate the gauge, the bladder in shape of a bubble disposed within the neck at rest and extending further within the neck under pressure.
Claim 11
Dependent Claim
13 words
A device according to claim 6 and wherein the housing contains a timer.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-02-07 | 1997-08-09 | 1998-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-07 | 2001-08-09 | 2002-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-07 | 2005-08-09 | 2006-02-08 | $7700.00 | Window Closed / Lapsed |