US3757776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilator for an anesthesia gas machine
Assignee: Individual
•
Filing: 1971-06-01
•
Granted: 1973-09-11
•
Expires: 1991-06-01
Abstract
Abstract Located adjacent an anesthesia gas machine is a pair of opposed, concave paddles, relatively movable toward and away from each other, alternately squeezing and releasing a conventional, flexible, breathing bag interposed between the paddles. The frequency of the paddle opening and closing cycle can be controlled; and a warning mechanism monitors and indicates excessive back pressure during bag compression, thereby alerting the anesthetist to a change in the patient''s responses.
Inventors
- 👤 J Baumann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:30
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/0057
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
124 words
A ventilator for an anesthesia gas machine having a flexible gas reservoir bag connected thereto at one end and laterally exposed comprising: a. a frame; b. a pair of paddles; c. means for cantilevering one of said paddles on said frame to project therefrom into lateral abutment with one exposed side of said bag; d. means for movably cantilevering the other one of said paddles on said frame to project therefrom into lateral abutment with the other exposed side of said bag; e. a rotary actuating means on said frame including an electric motor; and, f. means including a crank and pitman for connecting said actuating means to drive said other paddle repeatedly to and fro and toward and away from said one paddle.
Claim 2
Dependent Claim
124 words
A ventilator for an anesthesia gas machine having a flexible gas reservoir bag connected thereto at one end and laterally exposed comprising: a. a frame; b. a pair of paddles; c. means for cantilevering one of said paddles on said frame to project therefrom into lateral abutment with one exposed side of said bag; d. means for movably cantilevering the other one of said paddles on said frame to project therefrom into lateral abutment with the other exposed side of said bag; e. a rotary actuating means on said frame including an electric motor; and, f. means including a crank and pitman for connecting said actuating means to drive said other paddle repeatedly to and fro and toward and away from said one paddle.
Claim 3
Dependent Claim
53 words
A ventilator as in claim 1 including a housing mounted on said frame, said one paddle projecting upwardly from said housing in a substantially vertical attitude, and said other paddle projecting upwardly from said housing and being movable between a first position approximately 40* to the vertical and a second position approximately vertical.
Claim 4
Dependent Claim
51 words
A ventilator according to claim 1 including a pivot mounting on said frame for said one of said paddles, a stop on said frame, and yielding means on said frame and engaging said one paddle for urging said one paddle toward said stop and toward said other one of said paddles.
Claim 5
Dependent Claim
24 words
A ventilator as in claim 3 further including warning means effective upon deflection of said one paddle resulting in compression of said yielding means.
Claim 6
Dependent Claim
35 words
A ventilator as in claim 4 wherein said warning means includes a signal member, and a pressure responsive switch connected to said signal member and closed by said deflection of said one of said paddles.
Claim 7
Dependent Claim
31 words
A ventilator as in claim 5 wherein said warning means includes adjustable means for controlling the extent of deflection of said one of said paddles required to actuate said signal member.
References Cited (Backward Citations)
GB190901084A
Cited
US1202125A
Cited
US2591120A
Cited
US2582210A
Cited
US3114365A
Cited
US3527555A
Cited
US3566387A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |