Patent US3738450A successfully refreshed from Google Patents.
US3738450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable extensible fire escape slide
Assignee: Individual
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Filing: 1971-07-06
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Granted: 1973-06-12
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Expires: 1991-07-06
Abstract
Abstract A portable fire escape comprising a plurality of generally Ushaped chute members, the outside edges of one turned outwardly over the corresponding turned edges of the next, to provide a slidably interlocked, telescopically extensible system, with stops to limit the sliding of one chute member relative to its adjacent counterpart. The upper entrance end of the fire escape chute is pivotally connected to at least one clamping support strap for anchoring the chute to the escape window sill, with means provided for maintaining a suitable angle between the chute and the vertical wall of the building to be evacuated.
Inventors
- 👤 H Hessler
- 👤 A Hessler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:00
CPC Classifications
A; A62; A62B; A62B1/00; A62B1/20
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
184 words
A portable extensible fire escape for use in conjunction with the sill of a window in an upper story of a building, which comprises: at least two substantially U-shaped chute members disposed in nested relationship with each other, each of said chute members having a substantially flat base portion and two upstanding side guide walls, each of said guide walls terminating at its upper end in an outwardly turned-over end portion, whereby each of said chute members is slidably interlocked with its next successive chute member; means for limiting the sliding extension of each of said chute members relative to its next successive chute member; anchoring means comprising at least one strap, shaped and adapted to embrace the window sill, said anchoring means being pivotally attached to the uppermost end of the uppermost of said chute members; and means for establishing a predetermined angle between said chute members and the window sill when the fire escape is in operative position, said anchoring means and said means for establishing the angle between said chute members and the window sill being incorporated in a single element.
Claim 2
Dependent Claim
184 words
A portable extensible fire escape for use in conjunction with the sill of a window in an upper story of a building, which comprises: at least two substantially U-shaped chute members disposed in nested relationship with each other, each of said chute members having a substantially flat base portion and two upstanding side guide walls, each of said guide walls terminating at its upper end in an outwardly turned-over end portion, whereby each of said chute members is slidably interlocked with its next successive chute member; means for limiting the sliding extension of each of said chute members relative to its next successive chute member; anchoring means comprising at least one strap, shaped and adapted to embrace the window sill, said anchoring means being pivotally attached to the uppermost end of the uppermost of said chute members; and means for establishing a predetermined angle between said chute members and the window sill when the fire escape is in operative position, said anchoring means and said means for establishing the angle between said chute members and the window sill being incorporated in a single element.
Claim 3
Dependent Claim
27 words
The portable fire escape as described in claim 1, wherein said outwardly turned-over end portions of said side guide walls are rolled into a substantially cylindrical configuration.
Claim 4
Dependent Claim
107 words
A portable fire escape according to claim 1, wherein said means for limiting the sliding extension of each of said chute members relative to its next successive chute member comprises: said two upstanding side walls of one of said chute members each being slotted longitudinally for a substantial portion of its length; and said two upstanding side walls of said next successive chute member each having affixed thereto a cylindrical element adapted to pass through each of said slotted side walls and to permit slidable movement of said slotted side walls relative to said side walls bearing said cylindrical elements only as far as the slots extend.
Claim 5
Dependent Claim
46 words
A portable fire escape as described in claim 1, wherein said means for establishing the angle between said chute members and the window sill comprises at least one wedge-shaped element adapted to rest on the window sill and support said chute members at a predetermined angle.
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) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |