US4066079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter needle
Assignee: Individual
•
Filing: 1976-11-03
•
Granted: 1978-01-03
•
Expires: 1996-11-03
Abstract
Abstract A simple device which attaches to an injection syringe for preventing possible contaminants in a fluid drawn into the syringe from being expelled therefrom into an intravenous solution, for example. The device hereof is simply comprised as a needle holder adapted for removable attachment to a syringe barrel for accepting the flow of a liquid into the syringe during loading of same and which automatically filters such liquid dispensed from the syringe through the needle.
Inventors
- 👤 Victor D. Chiarolla
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:05
CPC Classifications
A; A61; A61J; A61J1/00; A61J1/14; A61J1/20; A61J1/2096; A61M; A61M5/00; A61M5/14; A61M5/162; A61M5/165; A61M5/178; A61M5/31; A61M5/3145; A61J1/05; A61J1/06; A61J1/2003; A61J1/2006; A61J1/201; A61J1/2079; A61J1/2086; A61M2005/1623
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
155 words
An improved filter device for an injection syringe which has a plunger disposed in a barrel for drawing a fluid into the barrel through a front opening and ejecting such fluid therefrom by plunger movement comprising: a housing having a syringe receiving rear opening at the rear thereof for engagement with a syringe about the front opening thereof and a needle receiving aperture at the front thereof for engaging a hypodermic needle in extension therefrom, said housing defining first and second separate passages extending between said rear opening and front aperture thereof, a first one-way valve disposed in said first passage for admitting the flow of fluid therethrough only from said aperture to said opening, a second one-way valve disposed in said second passage for admitting the flow of fluid therethrough only from said opening to said aperture, and filter material disposed in one of said passages on the inlet side of the valve therein.
Claim 2
Dependent Claim
155 words
An improved filter device for an injection syringe which has a plunger disposed in a barrel for drawing a fluid into the barrel through a front opening and ejecting such fluid therefrom by plunger movement comprising: a housing having a syringe receiving rear opening at the rear thereof for engagement with a syringe about the front opening thereof and a needle receiving aperture at the front thereof for engaging a hypodermic needle in extension therefrom, said housing defining first and second separate passages extending between said rear opening and front aperture thereof, a first one-way valve disposed in said first passage for admitting the flow of fluid therethrough only from said aperture to said opening, a second one-way valve disposed in said second passage for admitting the flow of fluid therethrough only from said opening to said aperture, and filter material disposed in one of said passages on the inlet side of the valve therein.
Claim 3
Dependent Claim
18 words
The filter device of claim 1 further defined by said filter material being disposed in said second passage.
Claim 4
Dependent Claim
24 words
The filter device of claim 1 further defined by said second valve being disposed at an end of said second passage adjacent said aperture.
Claim 5
Dependent Claim
64 words
The filter device of claim 1 further defined by each of said passages having an internal shoulder thereabout serving as a valve seat and each of said valves including a disc configured to substantially fit the internal cross sectional configuration of the respective passage and secured to the housing in such passage for movement into and out of seating engagement with the shoulder therein.
Claim 6
Dependent Claim
56 words
The filter device of claim 1 further defined by said housing having a rear projection with said rear opening extending therethrough and conically expanding rearwardly to mate with a tapered front end of a syringe for removable engagement therewith, and said device having a hypodermic needle permanently fixed in said aperture and extending from said device.
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) | 1981-01-02 | 1981-07-04 | 1982-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-02 | 1985-07-04 | 1986-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-02 | 1989-07-04 | 1990-01-03 | $7700.00 | Window Closed / Lapsed |