US5250030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hypodermic syringe with a blockable piston capable of preventing its recharge and reuse
Assignee: Individual
•
Filing: 1991-10-29
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Granted: 1993-10-05
•
Expires: 2011-10-29
Abstract
Abstract Hypodermic syringe with a blockable piston capable of preventing it recharge and reuse, comprising a cylindrical tubular body having a communicating container in its inlet end; a right-angled section piston rod; a first blocking means constituted by at least one member placed in abutment against rotation over the container bottom and opposed alternatively to on and the other of toothed intermediate sections of the piston rod; and a second blocking means slidingly mounted over the piston rod, placed in abutment with the first blocking means and urged in positional fastening by an elastic retention member constituting in turn, the lid of the container.
Inventors
- 👤 Cesar G. Corsich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:10
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/50; A61M5/5013; A61M5/502; A61M2005/5026; A61M2005/5033
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
266 words
A hypodermic syringe with a blockage piston capable of preventing its recharge and reuse, comprising, in combination: a cylindrical tubular body; a piston means including a piston located within the cylindrical tubular body and having a right-angled piston rod section associated therewith, said piston means being movable axially of the tubular body in one direction to retract the piston for drawing a substance into said tubular body; said right-angled piston rod section including a pair of intersecting opposed wings, the longitudinal outward edges of one of said pair of intersecting opposed wings having intermediate sections which include tooth shaped portions, with each tooth shaped portion defining opposed indentation slopes thereof with said intermediate sections located within the tubular body; a blocking means positioned within said cylindrical tubular body and engageable with said tooth shaped portions of said longitudinal outward edges of said intermediate section of said piston rod section, said blocking means constituted by at least one member placed in abutment against rotation with respect to said tubular body and cooperating with said tooth shaped portions of the piston rod for permitting the advancement of the piston rod axially outwardly of said tubular body, and, after a 90° turn of the piston rod, axial inward movement of said piston rod into said tubular body; and locking means including a first member slidably mounted on and operatively associated with said pair of opposed wings of said piston rod to be rotated thereby through said 90° turn of said piston rod to a locking position to prevent further rotation of said piston rod relative to said tubular body.
Claim 2
Dependent Claim
266 words
A hypodermic syringe with a blockage piston capable of preventing its recharge and reuse, comprising, in combination: a cylindrical tubular body; a piston means including a piston located within the cylindrical tubular body and having a right-angled piston rod section associated therewith, said piston means being movable axially of the tubular body in one direction to retract the piston for drawing a substance into said tubular body; said right-angled piston rod section including a pair of intersecting opposed wings, the longitudinal outward edges of one of said pair of intersecting opposed wings having intermediate sections which include tooth shaped portions, with each tooth shaped portion defining opposed indentation slopes thereof with said intermediate sections located within the tubular body; a blocking means positioned within said cylindrical tubular body and engageable with said tooth shaped portions of said longitudinal outward edges of said intermediate section of said piston rod section, said blocking means constituted by at least one member placed in abutment against rotation with respect to said tubular body and cooperating with said tooth shaped portions of the piston rod for permitting the advancement of the piston rod axially outwardly of said tubular body, and, after a 90° turn of the piston rod, axial inward movement of said piston rod into said tubular body; and locking means including a first member slidably mounted on and operatively associated with said pair of opposed wings of said piston rod to be rotated thereby through said 90° turn of said piston rod to a locking position to prevent further rotation of said piston rod relative to said tubular body.
Claim 3
Dependent Claim
35 words
The hypodermic syringe according to claim 1, characterized in that the other pair of intersecting opposed wings of said piston rod section possess a radial diameter less than said one of said pair of wings.
Claim 4
Dependent Claim
37 words
The hypodermic syringe according to claim 1, characterized in that said blocking means comprises first and second angular members having respective first and second blocking lugs and a spacer interposed between said first and second angular members.
Claim 5
Dependent Claim
35 words
The hypodermic syringe according to claim 1, characterized in that said blocking means comprises an angular member with a pair of lugs related to each indentation slopes of said tooth shaped portions of said rod.
Claim 6
Dependent Claim
35 words
The hypodermic syringe according to claim 1, characterized in that said cylindrical tubular body includes a longitudinal rib engageable by said blocking means to prevent rotation of the blocking means relative to said tubular body.
Claim 7
Dependent Claim
262 words
In a hypodermic syringe having a hollow cylindrical tubular body and piston means including a piston located within the tubular body and having a piston rod, the piston means being movable axially of the tubular body in one direction to retract the piston for drawing a substance into the tubular body and being movable in the opposite direction to advance the piston for discharging the substance, and the piston means being rotatable within the tubular body between first and second angular positions, the improvement comprising: blocking means including first means cooperating with the piston means to permit the piston to be retracted while the piston means is at said first angular position and to prevent subsequent advancement of the piston as long as the piston means remains at said first angular position, second means cooperating with the piston to permit advancement of the piston while the piston means is at said second angular position and to prevent subsequent retraction of the piston while the piston means remains at said second angular position; and locking means effective upon rotation of the piston means from said first angular position to said second angular position for preventing rotation of the piston means from said second angular position to said first angular position, said locking means comprising a disc member having an aperture conforming to the shape of said piston rod and adapted for rotation therewith, and resilient means coaxially positioned about said piston rod and including a locking arm which engages the disc member when said disc member is rotated to said second angular position.
Claim 8
Dependent Claim
262 words
In a hypodermic syringe having a hollow cylindrical tubular body and piston means including a piston located within the tubular body and having a piston rod, the piston means being movable axially of the tubular body in one direction to retract the piston for drawing a substance into the tubular body and being movable in the opposite direction to advance the piston for discharging the substance, and the piston means being rotatable within the tubular body between first and second angular positions, the improvement comprising: blocking means including first means cooperating with the piston means to permit the piston to be retracted while the piston means is at said first angular position and to prevent subsequent advancement of the piston as long as the piston means remains at said first angular position, second means cooperating with the piston to permit advancement of the piston while the piston means is at said second angular position and to prevent subsequent retraction of the piston while the piston means remains at said second angular position; and locking means effective upon rotation of the piston means from said first angular position to said second angular position for preventing rotation of the piston means from said second angular position to said first angular position, said locking means comprising a disc member having an aperture conforming to the shape of said piston rod and adapted for rotation therewith, and resilient means coaxially positioned about said piston rod and including a locking arm which engages the disc member when said disc member is rotated to said second angular position.
Claim 9
Dependent Claim
44 words
The hypodermic syringe according to claim 6 wherein said locking means includes a guide notch associated with the disc member and stop means associated with the tubular body, said guide notch cooperating with said stop means to define said fist and second angular positions.
Claim 10
Dependent Claim
80 words
The hypodermic syringe according to claim 6 wherein said first means comprises a first lug associated with one of the piston means and the tubular body, and first ratchet means associated with the other one of the piston means and the tubular body, and wherein said second means comprises a second lug associated with one of the piston means and the tubular body, and second ratchet means associated with the other one of the piston means and the tubular body.
Claim 11
Dependent Claim
56 words
The hypodermic syringe according to claim 8 wherein said first and second ratchet means are associated with the piston means, said first ratchet means being located on a first side of the piston means and said second ratchet means being located on a second side of the piston means which is opposite to the first side.
Claim 12
Dependent Claim
75 words
The hypodermic syringe according to claim 9 wherein said first ratchet means comprises a first set of teeth on a first surface of the piston rod and extending axially of the piston rod and inclined in a first direction, and said second ratchet means comprises a second set of teeth on a second surface of the piston rod and extending axially of the piston rod and inclined in a direction opposite to said first direction.
Claim 13
Dependent Claim
33 words
The hypodermic syringe according to claim 8 wherein said first and second lugs are associated with the tubular body and are located spaced apart approximately 90° from one another within the tubular body.
Claim 14
Dependent Claim
50 words
The hypodermic syringe according to claim 11 wherein said blocking means comprises first and second angular members located within the tubular body and indexed thereto, said angular members having said first and second projections directed inwardly toward the axis of the tubular body, defining said first and second lugs, respectively,
Claim 15
Dependent Claim
49 words
The hypodermic syringe according to claim 11 wherein said blocking means comprises a one-piece angular member located within the tubular body and indexed thereto, said angular member having said first and second projections directed inwardly toward the axis of the tubular body, defining said first and second lugs, respectively.
Claim 16
Dependent Claim
245 words
In a hypodermic syringe having a hollow cylindrical tubular body and piston means including a piston located within the tubular body and having a piston rod, the piston means being movable axially of the tubular body in one direction to extend the piston with respect to the tubular body for drawing a substance into the tubular body and being movable in the opposite inward direction to advance the piston for discharging the substance from the distal end of the body, and the piston means being rotatable within the tubular body between first and second angular positions, the improvement comprising: first and second ratchet means on said piston means, blocking means positioned within said tubular body and including a first lug cooperating with first ratchet means to permit the piston means to be extended while the piston means is at said first angular position and to prevent subsequent advancement of the piston as long as the piston means remains at said first angular position and a second lug cooperating with second ratchet means to permit advancement of the piston while the piston means is at said second angular position and to prevent subsequent retraction of the piston while the piston means remains at said second angular position; and locking means associated with the piston means and effective upon rotation of the piston means from said first angular position to said second angular position for preventing further rotation of the piston means relative to the tubular body.
Claim 17
Dependent Claim
245 words
In a hypodermic syringe having a hollow cylindrical tubular body and piston means including a piston located within the tubular body and having a piston rod, the piston means being movable axially of the tubular body in one direction to extend the piston with respect to the tubular body for drawing a substance into the tubular body and being movable in the opposite inward direction to advance the piston for discharging the substance from the distal end of the body, and the piston means being rotatable within the tubular body between first and second angular positions, the improvement comprising: first and second ratchet means on said piston means, blocking means positioned within said tubular body and including a first lug cooperating with first ratchet means to permit the piston means to be extended while the piston means is at said first angular position and to prevent subsequent advancement of the piston as long as the piston means remains at said first angular position and a second lug cooperating with second ratchet means to permit advancement of the piston while the piston means is at said second angular position and to prevent subsequent retraction of the piston while the piston means remains at said second angular position; and locking means associated with the piston means and effective upon rotation of the piston means from said first angular position to said second angular position for preventing further rotation of the piston means relative to the tubular body.
Claim 18
Dependent Claim
36 words
The hypodermic syringe according to claim 14 wherein said locking means includes a guide member associated with the piston means and adapted to cooperate with the tubular body for limiting rotational movement of the piston means.
Claim 19
Dependent Claim
37 words
The hypodermic syringe according to claim 15 wherein said locking means includes a resilient member cooperating with said guide member for preventing rotation of the piston means from said second angular position to said first angular position.
Claim 20
Dependent Claim
44 words
The hypodermic syringe according to claim 14 wherein said first ratchet means is located on a first side of the piston means and said second ratchet means is located on a second side of the piston means which is opposite to the first side.
Claim 21
Dependent Claim
75 words
The hypodermic syringe according to claim 17 wherein said first ratchet means comprises a first set of teeth on a first surface of the piston rod and extending axially of the piston rod and inclined in a first direction, and said second ratchet means comprises a second set of teeth on a second surface of the piston rod and extending axially of the piston rod and inclined in a direction opposite to said first direction.
Claim 22
Dependent Claim
22 words
The hypodermic syringe according to claim 14 wherein said first and second lugs are located spaced apart approximately 90° from one another.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-10-04 | 1997-04-05 | 1997-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-10-04 | 2001-04-05 | 2001-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-10-04 | 2005-04-05 | 2005-10-05 | $7700.00 | Window Closed / Lapsed |