US4286589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extension lead for a respirator alarm system
Assignee: Puritan Bennett Corp
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Filing: 1979-11-13
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Granted: 1981-09-01
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Expires: 1999-11-13
Abstract
Abstract In an artificial respiration apparatus, especially in positive pressure types, it has been found that an extension lead for a respirator alarm system is desirable. This lead will extend beyond the respirator to permit a patient to initiate an alarm when help is needed. The lead is connected to the alarm initiating circuit in the respirator in a manner which makes its connection or disconnection optional with the alarm system in the respirator working in its regular manner when the extension lead is disconnected.
Inventors
- 👤 Harris A. Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:49
CPC Classifications
A; A61; A61G; A61G12/00; A61M; A61M16/00; A61M16/0051; A61M16/021; A61G2203/00; A61G2203/70
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
191 words
In a respirator having: a primary circuit energized by an electrical power source to drive the respirator components; a normally closed alarm-initiator circuit connecting with the primary circuit; means associated with the respirator components to open the alarm-initiator circuit whenever a respirator component fails or the power source fails; a normally open alarm circuit having an alarm means and an independent power source to actuate the alarm means whenever the circuit closes; and means associated with the alarm-initiator circuit to close the alarm circuit whenever the alarm-initiator circuit opens, the improvement comprising: a disconnectable extension lead extended from the respirator, having a normally-closed, manually-actuatable switch at its extended end adapted to provide a manually actuated alarm function by the patient opening the normally closed manually-actuatable switch, and means in the alarm-initiator circuit adapted to close the circuit at the respirator connection point of the extension lead when disconnection of the extension lead is made, to maintain the alarm-initiator circuit in a closed state, and to open the circuit at the point of connection when connection of the extension lead is made, to place the lead in series with the alarm-initiator circuit.
Claim 2
Dependent Claim
191 words
In a respirator having: a primary circuit energized by an electrical power source to drive the respirator components; a normally closed alarm-initiator circuit connecting with the primary circuit; means associated with the respirator components to open the alarm-initiator circuit whenever a respirator component fails or the power source fails; a normally open alarm circuit having an alarm means and an independent power source to actuate the alarm means whenever the circuit closes; and means associated with the alarm-initiator circuit to close the alarm circuit whenever the alarm-initiator circuit opens, the improvement comprising: a disconnectable extension lead extended from the respirator, having a normally-closed, manually-actuatable switch at its extended end adapted to provide a manually actuated alarm function by the patient opening the normally closed manually-actuatable switch, and means in the alarm-initiator circuit adapted to close the circuit at the respirator connection point of the extension lead when disconnection of the extension lead is made, to maintain the alarm-initiator circuit in a closed state, and to open the circuit at the point of connection when connection of the extension lead is made, to place the lead in series with the alarm-initiator circuit.
Claim 3
Dependent Claim
98 words
The organization defined in claim 1 wherein the extension lead is connected to a plug having two contact points, one for each end of the lead wire, and the connection point at the respirator is a socket having two contact points, one for each side of the alarm-initiator circuit and being adapted to engage the plug contact points when the plug is inserted into the socket, and a switch means in the alarm-initiator circuit at the socket adapted to normally close the circuit across the contact points but to open whenever the plug is inserted into the socket.
Claim 4
Dependent Claim
30 words
The organization defined in claim 2 wherein said switch means is positioned in the socket to be engaged and opened by the plug when it is inserted in the socket.
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) | 1984-08-31 | 1985-03-02 | 1985-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-31 | 1989-03-02 | 1989-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-31 | 1993-03-02 | 1993-09-01 | $7700.00 | Window Closed / Lapsed |