US3722938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emergency exit door unlatching actuator
Assignee: Sargent Manufacturing Co
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Filing: 1971-03-22
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Granted: 1973-03-27
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Expires: 1991-03-22
Abstract
Abstract Emergency exit doors are conventionally provided with a horizontally disposed bar which extends across the inside of a door. Such a bar is grasped and pushed towards the door which action unlatches the door and constitutes a means for opening the door as such emergency doors are hinged to move outwardly. The unlatching actuator is used to move the said bar downwardly towards the surface of the door by electric motive means without the necessity of using manually applied force. The bar is then held in an unlatched condition until the same electric motive means is utilized to permit the return of the bar to a normal position which is accomplished by the usually employed spring means associated with emergency or panic exit door unlatching assemblies.
Inventors
- 👤 C Bauer
- 👤 A Floyd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:26
CPC Classifications
E; E05; E05B; E05B65/00; E05B65/10; E05B65/1046; E05B65/106; E05B65/1066; E05B47/00; E05B47/0001; E05B2047/0014; E05B2047/0015; E05B2047/0017; E05B2047/0018; E05B2047/002; E05B47/0012; E05B65/1093; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/0908
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
143 words
In an emergency exit door having an inner face and latching means movable to latching and release positions, and a manually operable horizontal bar mounted on said inner face for swinging movement relative thereto, operatively connected to said latching means and normally biased into a position in which it maintains said latching means in latching position, the improvement comprising: a. an electric prime mover mounted on said inner face, b. a transmission operatively connected to said prime mover, and c. a lever having one end operatively connected to said transmission for pivotal movement thereby and a portion adjacent to its other end engaging said bar to move the bar into a position in which said latching means is released or away from said bar to permit the bar to be biased into a position in which said latching means is in latching position.
Claim 2
Dependent Claim
143 words
In an emergency exit door having an inner face and latching means movable to latching and release positions, and a manually operable horizontal bar mounted on said inner face for swinging movement relative thereto, operatively connected to said latching means and normally biased into a position in which it maintains said latching means in latching position, the improvement comprising: a. an electric prime mover mounted on said inner face, b. a transmission operatively connected to said prime mover, and c. a lever having one end operatively connected to said transmission for pivotal movement thereby and a portion adjacent to its other end engaging said bar to move the bar into a position in which said latching means is released or away from said bar to permit the bar to be biased into a position in which said latching means is in latching position.
Claim 3
Dependent Claim
14 words
The improvement of claim 1 wherein the prime motive means is an electric motor.
Claim 4
Dependent Claim
16 words
The improvement of claim 2 wherein the electric motor is capable of moving clockwise and counter-clockwise.
Claim 5
Dependent Claim
15 words
The improvement of claim 3 wherein the electric motor is a D.C. torque stall motor.
Claim 6
Dependent Claim
19 words
The improvemeNt of claim 1 wherein the transmission means includes member means whereby only the lever may be driven.
Claim 7
Dependent Claim
13 words
The improvement of claim 5 wherein the member means is a worm gear.
Claim 8
Dependent Claim
36 words
The improvement of claim 1 wherein the said other end of the lever overlays said portion of said bar and has shoulder means to retain said bar in a fixed release position relative to said lever.
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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |