US3908656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Activating means for vented chambers
Assignee: Kendall Co
•
Filing: 1973-11-23
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Granted: 1975-09-30
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Expires: 1993-11-23
Abstract
Abstract A venting means for closed system drainage devices utilizing a drip chamber and anti-reflux mechanism can be activated, when blocked by the filter system therein coming in contact with the rising fluid within the drip chamber, by using air as the activating means therefor. The drip chamber is constructed so that an air pocket is created above a filter system that is positioned circumferentially around the chamber at a height that is at least the same as or higher than the lowermost portion of the drip tube entering from the top of the chamber. Upon contact of the filter material by the rising fluid, as described above, the surface tension created thereacross can be broken by simply tilting or otherwise slightly moving the chamber and causing the entrapped air to cut through the surface tension and thereby once again open the filter material to permit a venting action to take place.
Inventors
- 👤 William J Binard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:12
CPC Classifications
A; A61; A61F; A61F5/00; A61F5/44; A61F5/441; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86292; Y10T137/86324; Y10T137/86332
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
188 words
A vented chamber in a body fluid collection bag having an anti-reflux means thereon comprising: a flexible-walled body fluid collection bag having an opening on an upper portion thereof; a semirigid chamber disposed on said bag in working relationship with an inlet connector on said bag and with said opening thereon, said semirigid chamber having an anti-reflux means in working relation with said bag and having an opening at both ends thereof, the opening at the uppermost portion thereof having a drip tube extending down into said chamber; venting means positioned on said chamber at a height that is at least the same as or higher than the lowermost portion of said drip tube extending therein; an air-trap positioned within said chamber at a location therein above said venting means; and, means for activating the vented chamber comprising entrapped air within said air-trap for activating said venting means by cutting through any surface adsorption formed thereacross upon any tilting movement of said chamber; and, securing means on the lower opened end of said chamber for attaching said chamber to said inlet connector on said body fluid collection bag.
Claim 2
Dependent Claim
188 words
A vented chamber in a body fluid collection bag having an anti-reflux means thereon comprising: a flexible-walled body fluid collection bag having an opening on an upper portion thereof; a semirigid chamber disposed on said bag in working relationship with an inlet connector on said bag and with said opening thereon, said semirigid chamber having an anti-reflux means in working relation with said bag and having an opening at both ends thereof, the opening at the uppermost portion thereof having a drip tube extending down into said chamber; venting means positioned on said chamber at a height that is at least the same as or higher than the lowermost portion of said drip tube extending therein; an air-trap positioned within said chamber at a location therein above said venting means; and, means for activating the vented chamber comprising entrapped air within said air-trap for activating said venting means by cutting through any surface adsorption formed thereacross upon any tilting movement of said chamber; and, securing means on the lower opened end of said chamber for attaching said chamber to said inlet connector on said body fluid collection bag.
Claim 3
Dependent Claim
35 words
The chamber of claim 1 wherein said venting means is a porous material circumferentially placed within said chamber and further includes at least one opening on said chamber in congruous relationship with said porous material.
Claim 4
Dependent Claim
39 words
The chamber of claim 1 wherein said venting means is a plurality of pieces of porous material circumferentially placed within said chamber and further includes a plurality of openings on said chamber in congruous relation with said porous material.
Claim 5
Dependent Claim
16 words
The chamber of claim 2 wherein said venting means is a sheet of porous plasTic material.
Claim 6
Dependent Claim
14 words
The chamber of claim 2 wherein said venting means is a synthetic fiber-like material.
Claim 7
Dependent Claim
27 words
The chamber of claim 4 wherein said securing means includes a friction-fitted portion thereon tapered to tightly fit into a tubular inlet connector on said collection bag.
Claim 8
Dependent Claim
210 words
A vented chamber in a body fluid collection bag having an anti-reflux means thereon comprising: a flexible-walled body fluid collection bag having an opening on an upper portion thereof; a semirigid chamber disposed on said bag in working relationship with an inlet connector on said bag and with said opening thereof, said semirigid chamber having an anti-reflux means in working relation therewith and having an opening at both ends thereof, the opening at the uppermost portion thereof having a drip tube extending down into said chamber, said chamber having at least one opening therein at a height that is at least the same as or higher than the lowermost portion of said drip tube extending therein; a porous venting material circumferentially disposed within said chamber in congruous relationship with said at least one opening; a concave-like air-trap positioned within said chamber at a location therein directly above said porous venting means for activating the vented chamber comprising entrapped air within said air-trap for activating said venting means by cutting through any surface adsorption formed thereacross upon any tilting movement of said chamber; and, a friction fitted portion on the lower opened end of said chamber tapered to tightly fit into a tubular inlet connector on said body fluid collection bag.
Claim 9
Dependent Claim
210 words
A vented chamber in a body fluid collection bag having an anti-reflux means thereon comprising: a flexible-walled body fluid collection bag having an opening on an upper portion thereof; a semirigid chamber disposed on said bag in working relationship with an inlet connector on said bag and with said opening thereof, said semirigid chamber having an anti-reflux means in working relation therewith and having an opening at both ends thereof, the opening at the uppermost portion thereof having a drip tube extending down into said chamber, said chamber having at least one opening therein at a height that is at least the same as or higher than the lowermost portion of said drip tube extending therein; a porous venting material circumferentially disposed within said chamber in congruous relationship with said at least one opening; a concave-like air-trap positioned within said chamber at a location therein directly above said porous venting means for activating the vented chamber comprising entrapped air within said air-trap for activating said venting means by cutting through any surface adsorption formed thereacross upon any tilting movement of said chamber; and, a friction fitted portion on the lower opened end of said chamber tapered to tightly fit into a tubular inlet connector on said body fluid collection bag.
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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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |