US3768478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aspiration device for body fluids
Assignee: VERMITRON MEDICAL PROD Inc
•
Filing: 1972-08-25
•
Granted: 1973-10-30
•
Expires: 1992-08-25
Abstract
Abstract An aspiration device for withdrawing fluid from a patient''s body comprises a closed container and tubular members opening into the container to define passages for suction and fluid respectively. A control valve assembly in the container at the suction passage cuts off suction when fluid saturates an expansible, porous pad which then applies a nonporous, resilient sealing member to the suction passage.
Inventors
- 👤 C Ashley
- 👤 I Fertik
- 👤 C Huck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:31
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/71; A61M1/78; A61M1/784; A61M1/60; A61M2205/00; A61M2205/75; A61M2205/7536; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/7888; Y10T137/789
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
136 words
An aspiration device for withdrawing fluid from a patient''s body, comprising: a closed container; a first suction means defining a first passage for applying suction to the interior of said container; a second suction means defining a second passage for fluid to flow into said container; and a control valve assembly for cutting off suction from the interior of said container after a predetermined quantity of fluid has entered said container, said control valve comprising: a porous expansible pad exposed to said fluid in said container for expansion when saturated by said fluid; and a resilient, nonporous member interposed between said pad and said first passage and arranged to seal said first passage when said pad expands, so that suction is cut off from said second passage to stop withdrawal of fluid from said patient''s body.
Claim 2
Dependent Claim
136 words
An aspiration device for withdrawing fluid from a patient''s body, comprising: a closed container; a first suction means defining a first passage for applying suction to the interior of said container; a second suction means defining a second passage for fluid to flow into said container; and a control valve assembly for cutting off suction from the interior of said container after a predetermined quantity of fluid has entered said container, said control valve comprising: a porous expansible pad exposed to said fluid in said container for expansion when saturated by said fluid; and a resilient, nonporous member interposed between said pad and said first passage and arranged to seal said first passage when said pad expands, so that suction is cut off from said second passage to stop withdrawal of fluid from said patient''s body.
Claim 3
Dependent Claim
37 words
An aspiration device as defined in claim 1, further comprising a cup shaped support for said pad in said container, said support having at least one opening for exposing said pad to said fluid in said container.
Claim 4
Dependent Claim
38 words
An aspiration device as defined in claim 2, wherein said container comprises a generally circular cover; and a bag pheripherally joined to said cover, whereby said bag, cover and valve assembly can be discarded together as a unit.
Claim 5
Dependent Claim
66 words
An aspiration device as defined in claim 3, further comprising a cylindrical base having an open top, said cover fitting removable on said top of said base with said bag suspended inside said base, said control valve assembly having a passage formed therein for passing air between the inside and outside of said bag in said base for equalizing pressure on both sides of said bag.
Claim 6
Dependent Claim
84 words
An aspiration device as defined in claim 2, wherein said first suction means comprises a block rotatably fitted in said cup shaped member, said first passage extending through said block, said block having a third passage for passing suction between said first passage and the interior of said container, said cup shaped member having a lateral opening normally aligned with said third passage, whereby said third passage is closed by rotation of said block in said cup shaped member away from said lateral opening.
Claim 7
Dependent Claim
30 words
An aspiration device as defined in claim 1, wherein said container is cylindrical in form, said first suction means comprising a tubular member opening into one end of said container.
Claim 8
Dependent Claim
44 words
An aspiration device as defined in claim 6, wherein said pad and said resilient member are ring shaped and surround said tubular member, said first passage having a cylindrical end disposed adjacent to said resilient nonporous member for closure thereby when said pad expands.
Claim 9
Dependent Claim
34 words
An aspiration device as defined in claim 7, further comprising an inverted cup shaped baffle in said container disposed adjacent to said second passage for shielding said first passage from fluid entering said container.
Claim 10
Dependent Claim
37 words
An aspiration device as defined in claim 7, further comprising a cup shaped support for said pad in said container, said support having at least one opening for exposing said pad to said fluid in said container.
Claim 11
Dependent Claim
34 words
An aspiration device as defined in claim 9, wherein said cup shaped support is inverted to define a baffle adjacent to said second passage for shielding said first passage from fluid entering said container.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |