Patent US4072171A successfully refreshed from Google Patents.
US4072171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure control valve for a sphygmomanometer
Assignee: Individual
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Filing: 1976-09-14
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Granted: 1978-02-07
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Expires: 1996-09-14
Abstract
Abstract A control valve for a sphygmomanometer comprising a valve housing having at one end a communication opening adapted for communication with an arm cuff and at its other end an air supply opening adapted for communication with an elastic bulb for supplying air to the arm cuff. The housing has an air passage connecting the two openings. A tubular body is mounted on the casing to project radially therefrom and the body is connected at its bottom portion through a communication opening to the air passage intermediate the ends thereof. The outer end of the body is open to the atmosphere. A first valve of tubular shape is arranged to open and close an open end of the tubular body and a second valve of rod shape is loosely mounted in an air passage in the first valve and has an outer end projecting externally from the tubular body. The inner end portion of the second valve serves to open and close an open end of the air passage in the first valve. The first valve is restrained in a valve-closing position by a threaded tube screwed on the tubular body and a spring is provided which acts on the first valve in a valve-opening direction and on the second valve in a valve-closing direction. A check valve is mounted on the side of the air supply opening of the valve housing.
Inventors
- 👤 Shizumasa Nakazawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:24
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/02; A61B5/021; A61B5/022; A61B5/0235; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87265; Y10T137/87378; Y10T137/87394
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
285 words
A pressure control valve for a sphygmomanometer comprising a housing provided with an air passage having one end adapted for connection to an arm cuff and another end for connection with an air supply, a tubular body secured to said housing and having a hollow interior with a first end communicating with said air passage intermediate the ends thereof and a second open end, first valve means for closing said open end of the tubular body, said first valve means having a bore therein constituting an air passage having a first end in communication with ambient atmosphere and a second end in communication with the hollow interior of the tubular body, a second valve means loosely and slidably mounted in said bore in said first valve means for selectively opening and closing said second end of the air passage in said first valve means, external actuator means coupled to said second valve means and slidably actuated to displace the second valve means in said first valve means, spring means acting on said second valve means for closing said second end of the air passage in said first valve means, and a threaded member screwed on said tubular body for engaging said first valve means to hold the same in closed position against the open end of the tubular body, said second valve means including a portion bearing against said first valve means in the closed position of said second end of the air passage in said first valve means, said spring means acting on said first valve means through said portion on said second valve means to urge the first valve means in a direction tending to open said second end of the tubular body.
Claim 2
Dependent Claim
285 words
A pressure control valve for a sphygmomanometer comprising a housing provided with an air passage having one end adapted for connection to an arm cuff and another end for connection with an air supply, a tubular body secured to said housing and having a hollow interior with a first end communicating with said air passage intermediate the ends thereof and a second open end, first valve means for closing said open end of the tubular body, said first valve means having a bore therein constituting an air passage having a first end in communication with ambient atmosphere and a second end in communication with the hollow interior of the tubular body, a second valve means loosely and slidably mounted in said bore in said first valve means for selectively opening and closing said second end of the air passage in said first valve means, external actuator means coupled to said second valve means and slidably actuated to displace the second valve means in said first valve means, spring means acting on said second valve means for closing said second end of the air passage in said first valve means, and a threaded member screwed on said tubular body for engaging said first valve means to hold the same in closed position against the open end of the tubular body, said second valve means including a portion bearing against said first valve means in the closed position of said second end of the air passage in said first valve means, said spring means acting on said first valve means through said portion on said second valve means to urge the first valve means in a direction tending to open said second end of the tubular body.
Claim 3
Dependent Claim
92 words
A pressure control valve as claimed in claim 1 wherein said second valve means includes a tapered portion which passes through said second end of said air passage in said first valve means as said second valve means is displaced in said first valve means, said tapered portion having gradually reduced section to provide successively increasing clearance space with said second end as said second valve means is progressively displaced in said first valve means from said closed position of the second end of the air passage in said first valve means.
Claim 4
Dependent Claim
51 words
A pressure control valve as claimed in claim 2 wherein said second valve means further includes a rod portion extending loosely in said bore of said first valve means and projecting externally of said threaded member in connection with said external actuator means, said rod being connected to said tapered portion.
Claim 5
Dependent Claim
24 words
A pressure control valve as claimed in claim 3 wherein said threaded member has a recess slidably accommodating said external actuator means with clearance.
Claim 6
Dependent Claim
62 words
A pressure control valve as claimed in claim 3 wherein said external actuator means is secured to said rod, said portion of the second valve means which bears against said first valve means in the closed position of the second end of the air passage of the first valve means being of larger section than the largest section of said tapered portion.
Claim 7
Dependent Claim
30 words
A pressure control valve as claimed in claim 3 wherein said first valve means has an end bearing against said threaded member which end is provided with a cut-out portion.
Claim 8
Dependent Claim
36 words
A pressure control valve as claimed in claim 1 comprising check valve means for admitting air from said air supply into said air passage while preventing reverse flow from the air passage to said air supply.
References Cited (Backward Citations)
US3254671A
Cited
US3457952A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-06 | 1981-08-08 | 1982-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-06 | 1985-08-08 | 1986-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-06 | 1989-08-08 | 1990-02-07 | $7700.00 | Window Closed / Lapsed |