US2220155A - Folding stairway - Google Patents

Folding stairway Download PDF

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Publication number
US2220155A
US2220155A US223566A US22356638A US2220155A US 2220155 A US2220155 A US 2220155A US 223566 A US223566 A US 223566A US 22356638 A US22356638 A US 22356638A US 2220155 A US2220155 A US 2220155A
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United States
Prior art keywords
tread
stairway
anchor
members
secured
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Expired - Lifetime
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US223566A
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Jachim Frank
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Individual
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    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C9/00—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes
    • E06C9/06—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes movably mounted
    • 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
    • E04F11/06—Movable stairways, e.g. of loft ladders which may or may not be concealable or extensible collapsible, e.g. folding, telescopic
    • E04F11/062—Movable stairways, e.g. of loft ladders which may or may not be concealable or extensible collapsible, e.g. folding, telescopic folding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2590/00—Component parts, details or accessories for large containers
    • B65D2590/0091—Ladders
    • 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
    • E04F11/06—Movable stairways, e.g. of loft ladders which may or may not be concealable or extensible collapsible, e.g. folding, telescopic
    • E04F11/068—Movable stairways, e.g. of loft ladders which may or may not be concealable or extensible collapsible, e.g. folding, telescopic telescopic

Definitions

  • This invention ⁇ relates to an improved folding stairway which is exceptionally rugged and sturdy although/ exceeding light in weight.
  • the improved folding stairway of this invention is e especially adapted for employment in conjunction with a tank having a floating roof.
  • One of the principal objects of advantage and importance of the improved folding stairway of this invention resides in the provision of means lo whereby one end of the device may be raised or lowered at will.
  • Another and still further important object of advantage resides in the provision of means for maintaining the treads horizontal regardless of l5 the angle at which the stairway is positioned.
  • Still another and further object of advantage resides in the provision of means for maintaining a hand rail between the anchor post and the end of the stairway.
  • An additional object of importance of the improved folding stairway of this invention resides in the provision of means for forming a runway when the stairway is in a horizontal position.
  • FIG. 1 is a side elevational view ⁇ of a folding stairway which embodies the invention.
  • Fig. 2 is a side elevational view of the stairway elevated to a horizontal position.
  • Fig. 3 is a horizontal section taken on line 3-3 of Fig. 2, looking in the direction indicated by the arrows.
  • Fig. 4 is a vertical section taken on line 4-4 of Fig. 2. l
  • Fig. 5 is a vertical section taken on line 5-5 of Fig. 1.
  • the reference numeral I0 indicates generally the anchor posts which in the preferred embodiment of the invention are constructed of angle iron. However, it will be apparent that any other suitable anchorage may be employed.
  • each anchor post III Hingedly secured to each anchor post III is a supporting member I2 which is preferably constructed of angle iron.
  • a tierod I4 may be secured to the supporting member I2. Where the tierod I4 is used the supporting member I2 may be constructed of light weight material without danger of its sagging or becoming otherwise distorted.
  • each supporting member I2 Positioned closely adjacent the free end of each supporting member I2 is a wheel I6. 'I'he wheel I8 provides a means for allowing the end ofthe stairway to move over a surface as the structure is raised or lowered.
  • each anchor post I0 Hingedly secured to each anchor post I0 is a tread leveling member I9.
  • the tread l'veling members I8 are secured at one end to the anchor- 5 age and extend substantially parallel to the supporting member I2,
  • each tread leveling member I8 Hingedly secured tothe outwardly projecting end of each tread leveling member I8 is a tread supporting membery 20.
  • the tread supporting 10 members 20 are preferably constructed of angle iron as is clearly shown in the drawings. It will bev apparent however that any suitable material may be employed for a tread supporting member.
  • the tread supporting members 20 and the supl5 porting members -I2 form front and rear tread supporting units, respectively. Tread supporting members are positioned on each side of the improved stairway of this invention. Each tread supporting member 20 is positioned above a 'sup- 20 ⁇ porting member I2 and is at all times parallel thereto.
  • Each tread 22 is preferably constructed 25 of sheet metal and has at each end thereof an upwardly and a downwardly turned lug 24 and 26, respectively. Each of the lugs 24 and 26 are apertured to receive a bolt.
  • the upwardly projecting lug 24 is adapted to be secured to the tread supporting member 20 and thus support the forward portion of the tread.
  • the downwardly projecting lug 26' is adapted to be secured to the supporting member l2 and 35 thus support the rear portion of the tread.
  • tread supporting member 20 Projecting upwardly from tread supporting member 20 is a plurality of standards 28 which are adapted to support a hand rail 30.
  • the portion of the hand rail which is secured to the 40 anchor post IU is preferably constructed of tubing 32.
  • a portion of the hand rail is adapted to be telescoped vwithin the tubing 32.
  • This construction provides a hand rail extending from the anchor post to the end of the stairway re- 45 I vIt will be apparent from the foregoing that 55 the improved folding stairway ofthis invention may be used as a fire escape or for practically any purpose for whichma folding stairway is adapted.
  • each tread comes into edge to edge abutment with the next tread thus forming a practically smooth runway.
  • a pair of vertical 9" anchor posts in spaced parallel relation, a tread leveling link member pivotally secured tol each anchor post, an upper tread supporting member pivotally secured to the outer end of each link,
  • said anchor members a plurality of treads pivotally secured adjacent the rear edge thereof to said tread supporting members, a pair of upper tread supporting members, said treads being pivotally secured adjacent the front edges thereof to said upper tread supporting members, and a movable pivot to which the secured end of the upper tread supporting members is journaled, said movable pivot comprising a leveling link extending from the journaled end of each upper tread supporting member and having the other end thereof pivotally secured to an'anchor member.
  • an anchor member In a stairway, an anchor member, a pair of lower tread supporting members hingedly joined to said anchor membensaid anchor member pro- 10 viding a fixed pivot upon which the tread supporting members may move, a pair of upper tread supporting members, one end of said tread ⁇ supporting members being joined to a movable pivot, said movable'pivot comprising a pair of tread 15 leveling link members pivotally secured to said anchor member and said tread supporting mem- ⁇ bers, said rtread leveling link members being adapted to move into engagement with the lower tread supporting members when the stairway is raised to a horizontal position, and a. plurality of treads pivotally secured to said upper and said lower tread supporting members.v
  • an anchor pivotally secured to said anchor, a plurality of treads pivotally secured adjacent the rear edges thereof to said tread supporting members, a pair of upper tread supporting members pivotally secured to said treads closely adjacent the forward edge thereof, the upper end of each upper tread supporting member being journaled to a movable pivot, said movable pivot comprising a tread.
  • leveling link pivotally secured to said anchor, said link providing an angularly disposed brace barring-the upward movement of the stairway from a horizontal position.

Description

NOV. 5, 1940. F JACHlM 2,220,155
FOLDING STAIRWAY Filed Aug. 8, 1958 2 Sheets-Sheet 1 .CU J /Lf l Pme BY ATTORNEY.
Nov. 5, 1940. F CHN 2,220,155
FOLDING STAIRWAY Filed Aug. 8. 1938 2 'Sheets-Sheet 2 lll ATTORNEY.
Patented Nov. 5, 1940 UNITED STATES PATENT OFFICE 4 Claims.
This invention `relates to an improved folding stairway which is exceptionally rugged and sturdy although/ exceeding light in weight. The improved folding stairway of this invention is e especially adapted for employment in conjunction with a tank having a floating roof.
One of the principal objects of advantage and importance of the improved folding stairway of this invention resides in the provision of means lo whereby one end of the device may be raised or lowered at will. l
Another and still further important object of advantage resides in the provision of means for maintaining the treads horizontal regardless of l5 the angle at which the stairway is positioned.
Still another and further object of advantage resides in the provision of means for maintaining a hand rail between the anchor post and the end of the stairway.
An additional object of importance of the improved folding stairway of this invention resides in the provision of means for forming a runway when the stairway is in a horizontal position.
Additional objects of advantage and importance will become apparent as the following detailed description progresses, reference being had to the accompanying drawings, wherein Fig. 1 is a side elevational view `of a folding stairway which embodies the invention.
Fig. 2 is a side elevational view of the stairway elevated to a horizontal position.
Fig. 3 is a horizontal section taken on line 3-3 of Fig. 2, looking in the direction indicated by the arrows.
Fig. 4 is a vertical section taken on line 4-4 of Fig. 2. l
Fig. 5 is a vertical section taken on line 5-5 of Fig. 1.
As shown in the drawings:
The reference numeral I0 indicates generally the anchor posts which in the preferred embodiment of the invention are constructed of angle iron. However, it will be apparent that any other suitable anchorage may be employed.
Hingedly secured to each anchor post III is a supporting member I2 which is preferably constructed of angle iron. A tierod I4 may be secured to the supporting member I2. Where the tierod I4 is used the supporting member I2 may be constructed of light weight material without danger of its sagging or becoming otherwise distorted.
Positioned closely adjacent the free end of each supporting member I2 is a wheel I6. 'I'he wheel I8 provides a means for allowing the end ofthe stairway to move over a surface as the structure is raised or lowered.
Hingedly secured to each anchor post I0 is a tread leveling member I9. The tread l'veling members I8 are secured at one end to the anchor- 5 age and extend substantially parallel to the supporting member I2,
Hingedly secured tothe outwardly projecting end of each tread leveling member I8 is a tread supporting membery 20. The tread supporting 10 members 20 are preferably constructed of angle iron as is clearly shown in the drawings. It will bev apparent however that any suitable material may be employed for a tread supporting member. The tread supporting members 20 and the supl5 porting members -I2 form front and rear tread supporting units, respectively. Tread supporting members are positioned on each side of the improved stairway of this invention. Each tread supporting member 20 is positioned above a 'sup- 20` porting member I2 and is at all times parallel thereto.
Positioned between each pair of parallel supporting members I2 and 2U is a plurality of treads 22. Each tread is preferably constructed 25 of sheet metal and has at each end thereof an upwardly and a downwardly turned lug 24 and 26, respectively. Each of the lugs 24 and 26 are apertured to receive a bolt.
In the preferred embodiment of the invention 30 the upwardly projecting lug 24 is adapted to be secured to the tread supporting member 20 and thus support the forward portion of the tread. The downwardly projecting lug 26' is adapted to be secured to the supporting member l2 and 35 thus support the rear portion of the tread.
Projecting upwardly from tread supporting member 20 is a plurality of standards 28 which are adapted to support a hand rail 30. The portion of the hand rail which is secured to the 40 anchor post IU is preferably constructed of tubing 32. A portion of the hand rail is adapted to be telescoped vwithin the tubing 32. This construction provides a hand rail extending from the anchor post to the end of the stairway re- 45 I vIt will be apparent from the foregoing that 55 the improved folding stairway ofthis invention may be used as a fire escape or for practically any purpose for whichma folding stairway is adapted.
5 Moreover, when the stairway is raised to the horizontal position each tread comes into edge to edge abutment with the next tread thus forming a practically smooth runway.
It will be apparent to those skilled in the art l to which the invention appertains that numerous changes and alterations may be made with- 4out -departing from the spirit or scope of the invention. Accordingly, it is understood that the patent granted hereon is'to be limited only as 15 is necessitated by the prior art and the terminology of the claims when given the range of' equivalents to which they may be entitled. i I claim as my invention:
1. In a folding stairway, a pair of vertical 9" anchor posts in spaced parallel relation, a tread leveling link member pivotally secured tol each anchor post, an upper tread supporting member pivotally secured to the outer end of each link,
supporting member pivotally secured to each .of
said anchor members, a plurality of treads pivotally secured adjacent the rear edge thereof to said tread supporting members, a pair of upper tread supporting members, said treads being pivotally secured adjacent the front edges thereof to said upper tread supporting members, and a movable pivot to which the secured end of the upper tread supporting members is journaled, said movable pivot comprising a leveling link extending from the journaled end of each upper tread supporting member and having the other end thereof pivotally secured to an'anchor member.
3. In a stairway, an anchor member, a pair of lower tread supporting members hingedly joined to said anchor membensaid anchor member pro- 10 viding a fixed pivot upon which the tread supporting members may move, a pair of upper tread supporting members, one end of said tread` supporting members being joined to a movable pivot, said movable'pivot comprising a pair of tread 15 leveling link members pivotally secured to said anchor member and said tread supporting mem- \`bers, said rtread leveling link members being adapted to move into engagement with the lower tread supporting members when the stairway is raised to a horizontal position, and a. plurality of treads pivotally secured to said upper and said lower tread supporting members.v
4. In a stairway, an anchor, a'pair of tread supporting members pivotally secured to said anchor, a plurality of treads pivotally secured adjacent the rear edges thereof to said tread supporting members, a pair of upper tread supporting members pivotally secured to said treads closely adjacent the forward edge thereof, the upper end of each upper tread supporting member being journaled to a movable pivot, said movable pivot comprising a tread. leveling link pivotally secured to said anchor, said link providing an angularly disposed brace barring-the upward movement of the stairway from a horizontal position.
FRANK JACHIM.
US223566A 1938-08-08 1938-08-08 Folding stairway Expired - Lifetime US2220155A (en)

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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2542923A (en) * 1944-06-17 1951-02-20 Hallen Alf Eskil Ladder
US2593336A (en) * 1947-07-03 1952-04-15 Lawrence J Nixon Hinged and collapsible stairway
DE1151194B (en) * 1960-06-25 1963-07-04 Linkleters Patent Ship Fitting Shore or ladder
US3097370A (en) * 1963-07-16 Four-way adjustable bed rail unit
DE2237333A1 (en) * 1972-07-29 1974-02-14 Frank Gmbh Wilh FLOOR STAIRS CONSISTING OF AT LEAST TWO STAIR PARTS
US4039091A (en) * 1976-03-25 1977-08-02 Mb Associates Elevator type bus boarder
US4642953A (en) * 1986-02-10 1987-02-17 Degood David A Moveable stair apparatus
WO1987002723A1 (en) * 1985-11-01 1987-05-07 Lockheed Shipbuilding Company Articulated ramp
US6189653B1 (en) * 1997-04-08 2001-02-20 Horst Laug Multi-purpose scaffold
US20110139544A1 (en) * 2009-08-21 2011-06-16 Rory Frick Ladder
US20170101821A1 (en) * 2015-10-07 2017-04-13 Intex Marketing Ltd. Ladder with safety features
US10267122B2 (en) * 2016-03-24 2019-04-23 Adam Toma Mobile well servicing units and related methods
US20200199881A1 (en) * 2015-08-11 2020-06-25 Zev BIANCHI Retractable staircase
US10858893B2 (en) 2018-02-02 2020-12-08 Adam Toma Laterally movable mobile well servicing units and methods of use
US10968636B2 (en) * 2017-05-15 2021-04-06 Emeh, Inc. Moveable stair systems and methods
US11332923B2 (en) * 2018-06-28 2022-05-17 Emeh, Inc. Rotational connections for stairs
US11623830B1 (en) 2022-04-27 2023-04-11 Modology Design Group Trailer with loading and unloading system

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3097370A (en) * 1963-07-16 Four-way adjustable bed rail unit
US2542923A (en) * 1944-06-17 1951-02-20 Hallen Alf Eskil Ladder
US2593336A (en) * 1947-07-03 1952-04-15 Lawrence J Nixon Hinged and collapsible stairway
DE1151194B (en) * 1960-06-25 1963-07-04 Linkleters Patent Ship Fitting Shore or ladder
DE2237333A1 (en) * 1972-07-29 1974-02-14 Frank Gmbh Wilh FLOOR STAIRS CONSISTING OF AT LEAST TWO STAIR PARTS
US4039091A (en) * 1976-03-25 1977-08-02 Mb Associates Elevator type bus boarder
WO1987002723A1 (en) * 1985-11-01 1987-05-07 Lockheed Shipbuilding Company Articulated ramp
US4642953A (en) * 1986-02-10 1987-02-17 Degood David A Moveable stair apparatus
US6189653B1 (en) * 1997-04-08 2001-02-20 Horst Laug Multi-purpose scaffold
US20110139544A1 (en) * 2009-08-21 2011-06-16 Rory Frick Ladder
US9587434B2 (en) 2009-08-21 2017-03-07 Rory Frick Ladder
US20200199881A1 (en) * 2015-08-11 2020-06-25 Zev BIANCHI Retractable staircase
US10889993B2 (en) * 2015-08-11 2021-01-12 Zev BIANCHI Retractable staircase
US11408180B2 (en) 2015-08-11 2022-08-09 Zev BIANCHI Retractable staircase
US20170101821A1 (en) * 2015-10-07 2017-04-13 Intex Marketing Ltd. Ladder with safety features
US10920492B2 (en) * 2015-10-07 2021-02-16 Intex Marketing Ltd. Ladder with safety features
US10267122B2 (en) * 2016-03-24 2019-04-23 Adam Toma Mobile well servicing units and related methods
US11332940B2 (en) 2017-05-15 2022-05-17 Emeh, Inc. Moveable stair systems and methods
US10968636B2 (en) * 2017-05-15 2021-04-06 Emeh, Inc. Moveable stair systems and methods
US10858893B2 (en) 2018-02-02 2020-12-08 Adam Toma Laterally movable mobile well servicing units and methods of use
US11332923B2 (en) * 2018-06-28 2022-05-17 Emeh, Inc. Rotational connections for stairs
US11623830B1 (en) 2022-04-27 2023-04-11 Modology Design Group Trailer with loading and unloading system
US11731551B1 (en) 2022-04-27 2023-08-22 Modology Design Group Systems and methods for an automatic modular housing delivery system
US11732463B1 (en) 2022-04-27 2023-08-22 Modology Design Group Systems and methods for rotating modular housing modules on a trailer bed
US11739508B1 (en) 2022-04-27 2023-08-29 Modology Design Group Mobile modular home with a bladder tank support assembly
US11781312B1 (en) 2022-04-27 2023-10-10 Modology Design Group Systems and methods for rotating a modular home on a trailer
US11781310B1 (en) 2022-04-27 2023-10-10 Modology Design Group Modular home delivery system
US11787650B1 (en) 2022-04-27 2023-10-17 Modology Design Group Trailer with loading and unloading system
US11828058B2 (en) 2022-04-27 2023-11-28 Modology Design Group Trailer for modular home delivery and assembly

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