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US4723943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheathed syringe
Assignee: MONTANA DEACONESS MEDICAL CENTER
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Filing: 1986-12-31
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Granted: 1988-02-09
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Expires: 2006-12-31
Abstract
Abstract A syringe with a body and a needle at one end and an injection plunger movable into the body at the opposite end. A guide lug is fixed on the syringe body near the needle end. A sheath is positioned over the syringe body with a longitudinal groove that engages the guide lug. The sheath is movable with respect to the syringe body and guided by the lug so that it can selectively cover or expose the needle while not impeding use of the syringe.
Inventors
- 👤 John E. Spencer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:38
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/31; A61M5/32; A61M5/3205; A61M5/321; A61M5/3243; A61M5/3271; A61M5/3272; Y; Y10; Y10S; Y10S5/00; Y10S5/947
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
146 words
A syringe comprising: a syringe body having a needle at one end and an injection plunger movable into said body at the opposite end, a guide lug fixed on said syringe body, and a sheath positioned over said syringe body, said sheath having a groove engaging said guide lug, means to lock said guide lug and prevent movement of said sheath when said needle is covered comprising an opening communicating with said groove and extending transverse thereto, said groove engaging and restraining said guide lug, said opening comprising a first portion having a deformable retaining lip to positively lock said guide lug and a second portion that frictionally engages said guide lug whereby said sheath is movable with respect to said syringe body and is guided by said lug in said groove to selectively cover and expose said needle while not impeding use of said syringe.
Claim 2
Dependent Claim
146 words
A syringe comprising: a syringe body having a needle at one end and an injection plunger movable into said body at the opposite end, a guide lug fixed on said syringe body, and a sheath positioned over said syringe body, said sheath having a groove engaging said guide lug, means to lock said guide lug and prevent movement of said sheath when said needle is covered comprising an opening communicating with said groove and extending transverse thereto, said groove engaging and restraining said guide lug, said opening comprising a first portion having a deformable retaining lip to positively lock said guide lug and a second portion that frictionally engages said guide lug whereby said sheath is movable with respect to said syringe body and is guided by said lug in said groove to selectively cover and expose said needle while not impeding use of said syringe.
Claim 3
Dependent Claim
19 words
The syringe of claim 1, wherein said first and second portions extend respectively from opposite sides of said groove.
Claim 4
Dependent Claim
21 words
The syringe of claim 1, wherein said sheath further comprises a series of gripping edges at one end of said sheath.
Claim 5
Dependent Claim
17 words
The syringe of claim 1, wherein said sheath further comprises a retracting flange at one end thereof.
Claim 6
Dependent Claim
27 words
The syringe of claim 1, wherein said sheath further comprises a series of gripping ridges at one end and a retracting flange at the other end thereof.
Claim 7
Dependent Claim
106 words
A syringe unit comprising: a syringe body having a guide lug disposed on the outer periphery and, a sheath disposed over said syringe body and having a guide groove coacting with said guide lug to permit movement of said sheath relative to said syringe body, means to lock said guide lug and prevent movement of said sheath when said needle is covered comprising an opening communicating with said groove and extending transverse thereto, said groove engaging and restraining said guide lug, comprising a first portion having a deformable retaining lip to positively lock said guide lug and a second portion that frictionally engages said guide lug.
Claim 8
Dependent Claim
106 words
A syringe unit comprising: a syringe body having a guide lug disposed on the outer periphery and, a sheath disposed over said syringe body and having a guide groove coacting with said guide lug to permit movement of said sheath relative to said syringe body, means to lock said guide lug and prevent movement of said sheath when said needle is covered comprising an opening communicating with said groove and extending transverse thereto, said groove engaging and restraining said guide lug, comprising a first portion having a deformable retaining lip to positively lock said guide lug and a second portion that frictionally engages said guide lug.
Claim 9
Dependent Claim
19 words
The syringe of claim 6, wherein said first and second portions extend respectively from opposite sides of said groove.
Claim 10
Dependent Claim
19 words
The syringe of claim 6, wherein said first and second portions extend respectively from opposite sides of said groove.
Claim 11
Dependent Claim
21 words
The syringe of claim 6, wherein said sheath further comprises a series of gripping edges at one end of said sheath.
Claim 12
Dependent Claim
17 words
The syringe of claim 6, wherein said sheath further comprises a retracting flange at one end thereof.
Claim 13
Dependent Claim
27 words
The syringe of claim 6, wherein said sheath further comprises a series of gripping ridges at one end and a retracting flange at the other end thereof.
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) | 1991-02-08 | 1991-08-10 | 1992-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-08 | 1995-08-10 | 1996-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-08 | 1999-08-10 | 2000-02-09 | $7700.00 | Window Closed / Lapsed |