US3596586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emergency venting device
Assignee: BURT Manufacturing CO
•
Filing: 1970-04-22
•
Granted: 1971-08-03
•
Expires: 1990-04-22
Abstract
Abstract An automatic relief-type ventilator for a building with dampers or covers movable to and from open and closed positions and damper-operating mechanism including a damper lift arm with a support means pivotally engaging each lift arm intermediate the ends thereof, latch means operatively engaging an end of each lift arm to latch the dampers in closed position, and fusible restraining means associated with the latch mechanism to release the same for automatic damper-opening action under predetermined heat conditions.
Inventors
- 👤 Albert R Krannich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:37
CPC Classifications
F; F24; F24F; F24F7/00; F24F7/02; F24F11/00; F24F11/30; F24F11/32; F24F11/33; F24F11/34
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
143 words
A building ventilator comprising a base and frame means for engaging a building and operably covering an opening therein, a pair of cover panels pivotally and operatively engaging said base along a pair of opposed margins thereof and having operative closed positions inclined upwardly and inwardly towards each other to engage porTions of said frame means, a lift arm for each of said cover panels operably and pivotally secured intermediate its ends to said base to form upper and lower sections on said lift arms, each lift arm having an upper end operably engaging the inner surface of a said cover panel, a lift means operably secured between said lift arm lower sections, and restraining means operably secured between said lift arm lower sections and including a releasable latch means for each lift arm engaging the lower section of a said lift arm.
Claim 2
Dependent Claim
143 words
A building ventilator comprising a base and frame means for engaging a building and operably covering an opening therein, a pair of cover panels pivotally and operatively engaging said base along a pair of opposed margins thereof and having operative closed positions inclined upwardly and inwardly towards each other to engage porTions of said frame means, a lift arm for each of said cover panels operably and pivotally secured intermediate its ends to said base to form upper and lower sections on said lift arms, each lift arm having an upper end operably engaging the inner surface of a said cover panel, a lift means operably secured between said lift arm lower sections, and restraining means operably secured between said lift arm lower sections and including a releasable latch means for each lift arm engaging the lower section of a said lift arm.
Claim 3
Dependent Claim
30 words
A building ventilator as in claim 1 where said restraining means includes a heat-fusible release link and said latch means automatically releases said lift arms when said release link fuses.
Claim 4
Dependent Claim
50 words
A building ventilator as in claim 1 where lock means secure said cover panels to said lift arms and include a cantilevered lock bar forming the sole lock connection therebetween whereby on an explosive gas impact with said cover panels, said lock bars can deform and release said cover panels.
Claim 5
Dependent Claim
55 words
A building ventilator as in claim 2 where said latch means includes a latch arm having a shoulder therein, said latch arms of each said latch means being inclined downwardly and inwardly towards each other when operative, said latch arm shoulder engaging a said lift arm to place a release moment on said latch arm.
Claim 6
Dependent Claim
49 words
A building ventilator as in claim 1 where each of said cover panels has a guide channel extending from edge to edge thereof parallel to a said lift arm, and roller means are carried by each of said lift arms at the upper ends thereof to engage said channels.
Claim 7
Dependent Claim
50 words
A building ventilator as in claim 1 where said restraining means includes a tensioned coil spring, and a manual release member engages said latch means to enable them to be released by a force exerted on said release member and transmitted to said coil spring to increase the tension therein.
Claim 8
Dependent Claim
30 words
In an automatic relief-type ventilator with dampers and damper-operating mechanism, a damper lift arm with a support axle interposed between ends of the lift arm and pivotally engaging the same.
Claim 9
Dependent Claim
30 words
In an automatic relief-type ventilator with dampers and damper-operating mechanism, a damper lift arm with a support axle interposed between ends of the lift arm and pivotally engaging the same.
Claim 10
Dependent Claim
23 words
In an automatic relief-type ventilator as in claim 7 and including a latching assembly operatively engaging a lower end of the lifting arm.
Claim 11
Dependent Claim
33 words
In an automatic relief-type ventilator as in claim 7 and including a lock handle means engaging an upper end of the lift arm only, and not interfering with automatic operation of the damper.
Claim 12
Dependent Claim
82 words
A building ventilator as in claim 1 where said lift means includes a coil spring to move said cover panels to open positions, said latch means includes a latch arm having a shoulder therein, said latch arms of each said latch means being inclined downwardly and inwardly towards each other, said latch arm shoulder engaging the end of said lower section of said lift arm to place a release moment on said latch arm whereby an automatic cover-panel-opening action can be obtained.
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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |