US3789955A - Retractable stairway device - Google Patents
Retractable stairway device Download PDFInfo
- Publication number
- US3789955A US3789955A US00281735A US3789955DA US3789955A US 3789955 A US3789955 A US 3789955A US 00281735 A US00281735 A US 00281735A US 3789955D A US3789955D A US 3789955DA US 3789955 A US3789955 A US 3789955A
- Authority
- US
- United States
- Prior art keywords
- stair unit
- motor
- door panel
- trap door
- opening
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/02—Stairways; Layouts thereof
- E04F11/04—Movable stairways, e.g. of loft ladders which may or may not be concealable or extensible
Definitions
- ABSTRACT A motor is mounted in an upper floor adjacent an opening between the upper floor and an adjacent lower floor of a structure.
- a coupling device is provided in a stair unit and the motor so that in one manner of operation the motor retracts the stair unit upward onto the upper floor through the opening and closes the stair unit substantially flush with the upper floor. In another manner of operation, the motor opens the stair unit downward from the upper floor and extends the stair unit downward onto the lower floor through the opening.
- the present invention relates to a retractable stairway device.
- the principal object of the invention is to provide a retractable stairway device of simple structure, which is inexpensive in manufacture and functions with efficiency, effectiveness, reliability and rapidity to retract and extend a stairway between adjacent floors of a structure.
- FIG. I is a side view of the retractable stairway device of the invention in open position.
- FIG. 2 is an end view of the retractable stairway device of the invention in closed position.
- the retractable stairway device of the invention is provided in an opening 1 between an upper floor 2 and an adjacent lower floor 3 of a structure (FIG. 1).
- stairway device of the invention selectively provides access between the floors 2 and 3.
- the retractable stairway unit of the invention comprises a stair unit 4 (FIGS. 1 and 2).
- a reversible motor 5 (FIGS. I and 2) is mounted on the upper floor 2 adjacent the opening 1 between the floors and may comprise any suitable motor such as, for example, an electric motor, a hydraulic motor, an electrohydraulic motor, or the like.
- a trap door panel 6 (FIGS. 1 and 2) is mounted in the opening 1 between the floors and is coupled to the motor 5 by a coupling device 7 of any suitable type for pivotal movement by the motor from a position flush with the upper floor and closing the opening, as shown in FIG. 2, to a position extending at an angle between the floors, as shown in FIG. 1.
- the trap door panel 6 has a pair of spaced substantially parallel tracks 8 and 9 mounted therein (FIG. 2).
- the stair unit 4 is slidably mounted on the tracks 8 and 9.
- a coupling device such as, for example, a rack and pinion arrangement 10 (FIG. 2) is provided on the stair unit 4 and the motor 5.
- said motor moves the stair unit 4 via the rack and pinion 10 in an upward direction, indicated by an arrow 11 (FIG. 1), along the tracks 8 and 9 of the trap door panel 6 until the bottom 12 of said stair unit clears the free edge 13 (FIG. 1) of the trap door panel.
- the trap door panel 6 is then pivotally moved by the motor 5 via the coupling 7 to a position flush with the upper floor 2 in which it closes the opening 1 (FIG. 2).
- the motor 5 is preferably coupled to the trap door panel via a gear coupling 7, whereby said motor pivotally moves said trap door panel in a desired direction.
- the motor 5 moves the stair unit 4 in a desired direction via the rack and pinion 10.
- a retractable stairway device in an opening between an upper floor and an adjacent lower floor of a structure for selectively providing access between the floors, said retractable stairway device comprising a stair unit;
- a trap door panel mounted in the opening and coupled to the motor for pivotal movement by the motor from a position flush with the upper floor and closing the opening to a position extending at an angle between the floors, the stair unit being slidably mounted on the trap door panel;
- rack and pinion means coupling the stair unit to the motor means in a manner whereby in one manner of operation the motor means moves the stair unit in an upward direction along the trap door panel until the bottom of the stair unit clears the free edge of the trap door panel and in another manner of operation the motor means moves the stair unit in a downward direction along the trap door panel until the bottom of the stair unit is substantially adjacent the lower floor.
- a retractable stairway device as claimed in claim I wherein the motor means is a reversible motor.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Steps, Ramps, And Handrails (AREA)
Abstract
A motor is mounted in an upper floor adjacent an opening between the upper floor and an adjacent lower floor of a structure. A coupling device is provided in a stair unit and the motor so that in one manner of operation the motor retracts the stair unit upward onto the upper floor through the opening and closes the stair unit substantially flush with the upper floor. In another manner of operation, the motor opens the stair unit downward from the upper floor and extends the stair unit downward onto the lower floor through the opening.
Description
United States Patent 1 Knapp Feb. 5, 1974 RETRACTABLE STAIRWAY DEVICE [75] Inventor: William H. Knapp, Selma, Ala.
[73] Assignee: The Raymond Lee Organization,
- Inc., New York, NY.
[22] Filed: Aug. 18, 1972 [21] Appl. No.: 281,735
52 us. Cl. 182/78 51 Int. Cl. E06c 9/00 [58] Field of Search 182/68, 77, 78, 79, 80
[56] 2 References Cited UNITED STATES PATENTS L81 1,707 6/1931 Bessler 182/80 2,931,456 4/ l 960 Harmon 1,035,570 8/1912 Gary et al.
Primary Examiner-Reinaldo P. Machado Attorney, Agent, or FirmDaniel Jay Tick 5 7] ABSTRACT A motor is mounted in an upper floor adjacent an opening between the upper floor and an adjacent lower floor of a structure. A coupling device is provided in a stair unit and the motor so that in one manner of operation the motor retracts the stair unit upward onto the upper floor through the opening and closes the stair unit substantially flush with the upper floor. In another manner of operation, the motor opens the stair unit downward from the upper floor and extends the stair unit downward onto the lower floor through the opening.
3 Claims, 2 Drawing Figures .1 RETRACTABLE STAIRWAY DEVICE DESCRIPTION OF THE INVENTION The present invention relates to a retractable stairway device.
The principal object of the invention is to provide a retractable stairway device of simple structure, which is inexpensive in manufacture and functions with efficiency, effectiveness, reliability and rapidity to retract and extend a stairway between adjacent floors of a structure.
In order that the invention may be readily carried into effect, it will now be described with reference to the accompanying drawing, wherein:
FIG. I is a side view of the retractable stairway device of the invention in open position; and
FIG. 2 is an end view of the retractable stairway device of the invention in closed position.
In the FIGS., the same components are identified by the same reference numerals.
The retractable stairway device of the invention is provided in an opening 1 between an upper floor 2 and an adjacent lower floor 3 of a structure (FIG. 1). The
stairway device of the invention selectively provides access between the floors 2 and 3.
The retractable stairway unit of the invention comprises a stair unit 4 (FIGS. 1 and 2). A reversible motor 5 (FIGS. I and 2) is mounted on the upper floor 2 adjacent the opening 1 between the floors and may comprise any suitable motor such as, for example, an electric motor, a hydraulic motor, an electrohydraulic motor, or the like.
A trap door panel 6 (FIGS. 1 and 2) is mounted in the opening 1 between the floors and is coupled to the motor 5 by a coupling device 7 of any suitable type for pivotal movement by the motor from a position flush with the upper floor and closing the opening, as shown in FIG. 2, to a position extending at an angle between the floors, as shown in FIG. 1.
The trap door panel 6 has a pair of spaced substantially parallel tracks 8 and 9 mounted therein (FIG. 2). The stair unit 4 is slidably mounted on the tracks 8 and 9.
A coupling device such as, for example, a rack and pinion arrangement 10 (FIG. 2) is provided on the stair unit 4 and the motor 5. Thus, when the motor 5 is operated in one direction of rotation, said motor moves the stair unit 4 via the rack and pinion 10 in an upward direction, indicated by an arrow 11 (FIG. 1), along the tracks 8 and 9 of the trap door panel 6 until the bottom 12 of said stair unit clears the free edge 13 (FIG. 1) of the trap door panel.
The trap door panel 6 is then pivotally moved by the motor 5 via the coupling 7 to a position flush with the upper floor 2 in which it closes the opening 1 (FIG. 2).
When the motor 5 is operated in the opposite direction of rotation, said motor opens the trap door panel 6 via the coupling 7 to a position extending at an angle between the floors. The motor then moves the stair unit 4 via the rack and pinion 10 in a downward direction along the tracks 8 and 9 of the trap door panel 6 until the bottom 12 of said stair unit is substantially adjacent the lower floor 3, as shown in FIG. 1.
The motor 5 is preferably coupled to the trap door panel via a gear coupling 7, whereby said motor pivotally moves said trap door panel in a desired direction. The motor 5 moves the stair unit 4 in a desired direction via the rack and pinion 10.
I claim:
1. A retractable stairway device in an opening between an upper floor and an adjacent lower floor of a structure for selectively providing access between the floors, said retractable stairway device comprising a stair unit;
motor means on the upper floor adjacent the opening between the floors;
a trap door panel mounted in the opening and coupled to the motor for pivotal movement by the motor from a position flush with the upper floor and closing the opening to a position extending at an angle between the floors, the stair unit being slidably mounted on the trap door panel; and
rack and pinion means coupling the stair unit to the motor means in a manner whereby in one manner of operation the motor means moves the stair unit in an upward direction along the trap door panel until the bottom of the stair unit clears the free edge of the trap door panel and in another manner of operation the motor means moves the stair unit in a downward direction along the trap door panel until the bottom of the stair unit is substantially adjacent the lower floor.
2. A retractable stairway device as claimed in claim I, wherein the motor means is a reversible motor.
3. A retractable stairway device as claimed in claim 1, wherein the trap door panel has a pair of spaced substantially parallel tracks mounted thereon and the stair unit is slidably mounted on the tracks.
Claims (3)
1. A retractable stairway device in an opening between an upper floor and an adjacent lower floor of a structure for selectively providing access between the floors, said retractable stairway device comprising a stair unit; motor means on the upper floor adjacent the opening between the floors; a trap door panel mounted in the opening and coupled to the motor for pivotal movement by the motor from a position flush with the upper floor and closing the opening to a position extending at an angle between the floors, the stair unit being slidably mounted on the trap door panel; and rack and pinion means coupling the stair unit to the motor means in a manner whereby in one manner of operation the motor means moves the stair unit in an upward direction along the trap door panel until the bottom of the stair unit clears the free edge of the trap door panel and in another manner of operation the motor means moves the stair unit in a downward direction along the trap door panel until the bottom of the stair unit is substantially adjacent the lower floor.
2. A retractable stairway device as claimed in claim 1, wherein the motor means is a reversible motor.
3. A retractable stairway device as claimed in claim 1, wherein the trap door panel has a pair of spaced substantially parallel tracks mounted thereon and the stair unit is slidably mounted on the tracks.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US28173572A | 1972-08-18 | 1972-08-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3789955A true US3789955A (en) | 1974-02-05 |
Family
ID=23078572
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00281735A Expired - Lifetime US3789955A (en) | 1972-08-18 | 1972-08-18 | Retractable stairway device |
Country Status (1)
Country | Link |
---|---|
US (1) | US3789955A (en) |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5111906A (en) * | 1991-02-07 | 1992-05-12 | Auguste Abadia | Retractable ladder apparatus |
GB2252588A (en) * | 1991-02-05 | 1992-08-12 | Douglas Harvey | Loft ladder automation |
US6802392B1 (en) * | 2003-03-25 | 2004-10-12 | Gene S. Davis | Stowing stairway |
US6866118B1 (en) | 2003-04-30 | 2005-03-15 | William D. Battenberg | Motorized access apparatus for elevated areas |
US6886661B1 (en) | 2003-09-26 | 2005-05-03 | William D. Battenberg | Motorized access ladder for elevated areas |
US20070126252A1 (en) * | 2005-12-02 | 2007-06-07 | Castagno Leo L | Interior space expansion system |
US20070125598A1 (en) * | 2005-12-02 | 2007-06-07 | Castagno Leo L | Structure having a compactable walkway |
US20070181364A1 (en) * | 2006-02-06 | 2007-08-09 | Jean-Pierre Lair | Automatic Ladder for Attic Access |
US20070249280A1 (en) * | 2006-04-21 | 2007-10-25 | Dennis Johnson | Lift apparatus |
US20080060874A1 (en) * | 2006-02-06 | 2008-03-13 | Jean-Pierre Lair | Automatic ladder for attic access |
US20100192487A1 (en) * | 2008-10-09 | 2010-08-05 | Creative Products of WI, LLC | Pivotal stairway systems and method |
ES2392421A1 (en) * | 2010-07-22 | 2012-12-10 | Auga, Estructuras Y Desarrollos Slu | Escamoteable security ladder. (Machine-translation by Google Translate, not legally binding) |
US20170362901A1 (en) * | 2016-06-16 | 2017-12-21 | Nabors Drilling Technologies Usa, Inc. | Drilling rig stair tower with integrated utility lines and cable tray |
US9957720B1 (en) * | 2015-11-25 | 2018-05-01 | Majic Stairs Inc. | Retractable staircase and method |
US10208539B2 (en) * | 2014-11-18 | 2019-02-19 | Michael Beard | Extendable access device |
US11945701B1 (en) | 2020-11-13 | 2024-04-02 | Majic Stairs Inc. | Lift |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1035570A (en) * | 1912-08-13 | Charles Gary | Truck extension-ladder. | |
US1811707A (en) * | 1928-07-20 | 1931-06-23 | Bessler Disappearing Stairway | Disappearing stairway |
US2931456A (en) * | 1957-08-12 | 1960-04-05 | Prec Parts Corp | Disappearing stairway |
-
1972
- 1972-08-18 US US00281735A patent/US3789955A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1035570A (en) * | 1912-08-13 | Charles Gary | Truck extension-ladder. | |
US1811707A (en) * | 1928-07-20 | 1931-06-23 | Bessler Disappearing Stairway | Disappearing stairway |
US2931456A (en) * | 1957-08-12 | 1960-04-05 | Prec Parts Corp | Disappearing stairway |
Cited By (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2252588A (en) * | 1991-02-05 | 1992-08-12 | Douglas Harvey | Loft ladder automation |
GB2252588B (en) * | 1991-02-05 | 1995-03-08 | Douglas Harvey | Improved method of loft ladder automation |
US5111906A (en) * | 1991-02-07 | 1992-05-12 | Auguste Abadia | Retractable ladder apparatus |
US6802392B1 (en) * | 2003-03-25 | 2004-10-12 | Gene S. Davis | Stowing stairway |
US6866118B1 (en) | 2003-04-30 | 2005-03-15 | William D. Battenberg | Motorized access apparatus for elevated areas |
US6886661B1 (en) | 2003-09-26 | 2005-05-03 | William D. Battenberg | Motorized access ladder for elevated areas |
US7753171B2 (en) | 2005-12-02 | 2010-07-13 | Castagno Leo L | Structure having a compactable walkway |
US8376084B2 (en) | 2005-12-02 | 2013-02-19 | Leo L. Castagno | Structure having a compactable walkway |
US20070125598A1 (en) * | 2005-12-02 | 2007-06-07 | Castagno Leo L | Structure having a compactable walkway |
US20100236864A1 (en) * | 2005-12-02 | 2010-09-23 | Castagno Leo L | Structure having a compactable walkway |
US20070126252A1 (en) * | 2005-12-02 | 2007-06-07 | Castagno Leo L | Interior space expansion system |
US7360814B2 (en) | 2005-12-02 | 2008-04-22 | Castagno Leo L | Interior space expansion system |
US20070181364A1 (en) * | 2006-02-06 | 2007-08-09 | Jean-Pierre Lair | Automatic Ladder for Attic Access |
US7841448B2 (en) | 2006-02-06 | 2010-11-30 | Jean-Pierre Lair | Automatic ladder for attic access |
US8028804B2 (en) | 2006-02-06 | 2011-10-04 | Jean-Pierre Lair | Automatic ladder for attic access |
US20080060874A1 (en) * | 2006-02-06 | 2008-03-13 | Jean-Pierre Lair | Automatic ladder for attic access |
US20070249280A1 (en) * | 2006-04-21 | 2007-10-25 | Dennis Johnson | Lift apparatus |
US8020667B2 (en) | 2006-04-21 | 2011-09-20 | Dennis Johnson | Lift apparatus |
US20100192487A1 (en) * | 2008-10-09 | 2010-08-05 | Creative Products of WI, LLC | Pivotal stairway systems and method |
ES2392421A1 (en) * | 2010-07-22 | 2012-12-10 | Auga, Estructuras Y Desarrollos Slu | Escamoteable security ladder. (Machine-translation by Google Translate, not legally binding) |
US10208539B2 (en) * | 2014-11-18 | 2019-02-19 | Michael Beard | Extendable access device |
US9957720B1 (en) * | 2015-11-25 | 2018-05-01 | Majic Stairs Inc. | Retractable staircase and method |
US20170362901A1 (en) * | 2016-06-16 | 2017-12-21 | Nabors Drilling Technologies Usa, Inc. | Drilling rig stair tower with integrated utility lines and cable tray |
US10662718B2 (en) * | 2016-06-16 | 2020-05-26 | Nabors Drilling Technologies Usa, Inc. | Drilling rig stair tower with integrated utility lines and cable tray |
US11945701B1 (en) | 2020-11-13 | 2024-04-02 | Majic Stairs Inc. | Lift |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3789955A (en) | Retractable stairway device | |
NL165254C (en) | DEVICE FOR CLOSING A PUT DRILLING WITH A PACKER AND CEMENTING THE PUT DRILLING ABOVE THE PACKER. | |
NL7806559A (en) | DEVICE FOR MINERAL EXTRACTION THROUGH A BOREHOLE. | |
NL7803225A (en) | ELEVATOR, PARTICULARLY FOR A BUILDING FACADE. | |
NL187756C (en) | UPPER SILL FOR CARRYING MASONRY ABOVE AN OPENING IN A WALL. | |
NL166787C (en) | FITTING A SMOOTH BARRIER FOR WING STABILIZED PROJECTS. | |
NL175842C (en) | METHOD FOR SELECTIVELY TEMPORARY CLOSING OF PUNCTIONS IN THE CASING OF A DRILLWELL USING SHUT-UP BALLS. | |
US2789636A (en) | Door operating mechanism | |
NL174866C (en) | DEVICE FOR OPENING AND CLOSING A SAFETY VALVE FROM A COMMAND POST | |
NL146250B (en) | DEVICE FOR INSERTING A GLASS IN A WINDOW, DOOR WINDOW OR THE LIKE. | |
GB1263393A (en) | An assembly comprising a frame and at least one wing | |
NL7803555A (en) | PRESSURE-RESISTANT DOOR LOCK FOR COVERED SWITCH PANELS. | |
NL184434C (en) | DOOR CONSTRUCTION, ESPECIALLY FOR CLOSING A HOUSE. | |
ATA361577A (en) | SECURING FOR A JOINT BOLT, ESPECIALLY FOR WINDOWS, DOORS OR. DGL. | |
US3477543A (en) | Concealed bedroom fire exit | |
US1675166A (en) | Burglar net | |
CN209603706U (en) | A kind of structure for preventing door-plate from scratching wall | |
AT323597B (en) | DEVICE FOR OPERATING CONNECTION OF A HANDLE WITH AN ACTUATOR IN A WINDOW, A DOOR OR. DGL. | |
NL7606883A (en) | DEVICE FOR PROTECTION OF A GATE IN A BLINDED OR ARMORED WALL. | |
FR1464832A (en) | Improvements to formwork for doors, windows or the like | |
DE7148100U (en) | DEVICE FOR CONTROLLING ELECTRIC DRIVES FOR THE ACTIVATION OF MOVABLE WALL PANELS IN PARTICULAR WINDOWS OF MOTOR VEHICLES WHICH AT LEAST ONE OF THE ACCESS CONTROLLERS IS EQUIPPED WITH DEVICES TO LOCK THE OPENING FROM THE OUTSIDE | |
NL180034C (en) | LOCK FOR CLOSING A WINDOW. | |
ATA459181A (en) | FITTING FOR A TILTING-SLIDING WING, IN PARTICULAR LIFTING-TILTING-SLIDING WING, FROM WINDOWS, DOORS OR THE LIKE. | |
NL7607268A (en) | DEVICE FOR CONTROLLING A PULSE ACTUATED LASER. | |
JPS59165789A (en) | Shielding type strong box taking-out apparatus |