Classifications

• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
  • E04G1/00—Scaffolds primarily resting on the ground
  • E04G1/18—Scaffolds primarily resting on the ground adjustable in height
  • E04G1/20—Scaffolds comprising upright members and provision for supporting cross-members or platforms at different positions therealong

Definitions

• the instant invention relates to self-erecting suspension platform systems, particularly a ground based tower supported suspension type work platform.
• Suspension type work platforms are well-known in the art. They are traditionally mounted from the roof or upper stories of a building by means of temporary roof beams or permanent mounting davits, and often employ a track-based roof carriage, or monorails, to provide movable anchoring points for a work platform system. Obviously, a roof-mounted suspension platform system requires a usable roof, and therefore such a design is inherently unusable for a vertical structure under construction, for structures having a roof covered in large part with mechanical equipment for the HVAC system, or for a sloping roof. Alternatively, work platforms may be raised from the ground by means of a lift, such as seen in various "cherry-picker" type work baskets; or with a scissors-like arrangements as seen in U.S. Pat.
• ground based systems may utilize scaffolding supports that are built-up from sections in order to reach variable heights.
• a typical example is that seen in U.S. Pat. No. 4,294,332, in which rectangular scaffolding sections may be built up alongside a platform that climbs the scaffold sections by means of a rack and pinion system.
• a suspension platform design has also been designed, in which chains hooked to the scaffold section, or towers, serves to raise the platform.
• the present invention advances the state of the art with a variety of new capabilities and overcomes many of the shortcomings of prior devices in new and novel ways. In its most general sense, the present invention overcomes the shortcomings and limitations of the prior art in any of a number of generally effective configurations. The instant invention demonstrates such capabilities and overcomes many of the shortcomings of prior methods in new and novel ways.
• the present invention is a self-erecting suspension platform system intended for use in the construction, maintenance, and cleaning of structures, or any other access solution.
• the platform system comprises a work platform suspended between a sinistral modular mast and a dextral modular mast by a hoisting system.
• the sinistral modular mast and the dextral modular mast are each composed of at least two mast units stacked vertically and attached to one another.
• Each mast unit has a distal end, a proximal end, a multifunction rail extending from the distal end to the proximal end including a plurality of safety engagement devices and a stabilizer guide device, a unit interconnection device located substantially near the distal end, and a unit assembly guide.
• the multifunction rail of each mast unit substantially aligns with the multifunction rail of the adjacent mast unit.
• the modular mast units may be virtually any shape and configuration.
• the work platform serves as the stage upon which a user, or users, works to construct walls, wash windows, or any number of other elevated tasks.
• the work platform has a sinistral end and a dextral end.
• the work platform is designed to be suspended between the sinistral modular mast and the dextral modular mast. Therefore, the distance from the sinistral end to the dextral end of the work platform is less than, or substantially equal to, the mast separation distance.
• the work platform also has a sinistral mast stabilizer and a dextral mast stabilizer attached to the platform and is configured to cooperate with the sinistral and dextral mast stabilizer guide devices of the sinistral and dextral mast multifunction rails to prevent undesired swaying of the suspended work platform.
• the work platform also has a sinistral platform mast engager and a dextral platform mast engager attached to the platform and configured to cooperate with at least one of the plurality of sinistral and dextral mast safety engagement devices of the sinistral and dextral mast multifunction rails to releasably lock the platform to the modular mast thereby preventing unintentional descent of the platform.
• the hoisting system suspends the working platform from the modular masts.
• the hoisting system includes a sinistral carriage, a dextral carriage, a sinistral mast hoist, a dextral mast hoist, a sinistral mast cable, and a dextral mast cable.
• Each carriage is adapted to cooperatively receive the associated modular mast so that the carriage may be conveniently slid up and down the associated modular mast by a user.
• Each carriage also has a proximal end, a distal end, a body, a cable connector, an operator handle, and a carriage mast engager.
• the carriage mast engager is configured to releasably lock the carriage to the associated modular mast thereby preventing unintentional descent of the carriage.
• the mast hoists are attached to the working platform and the associated mast cable, which is then attached to the cable connector of the associated carriage thereby suspending the working platform from the carriages.
• the mast hoists adjust the elevation of the working platform by extending and retracting the mast cables.
• the platform system includes a control system having a central control station for user control.
• the central console station is in communication with each mast hoist thereby controlling the elevation of the work platform.
• FIG. 1 is a schematic side elevation view of the self-erecting suspension platform, not ;
• FIG. 2 is a schematic top plan of the self-erecting suspension platform, not to scale;
• FIG. 3 is a schematic side elevation view of the self-erecting suspension platform, not ;
• FIG. 4 is a schematic side elevation view of the self-erecting suspension platform, not ;
• FIG. 5 is a schematic side elevation view of the self-erecting suspension platform, not ;
• FIG. 6 is a schematic side elevation view of the self-erecting suspension platform, not ;
• FIG. 7 is a schematic side elevation view of a portion of the sinistral modular mast, cale;
• FIG. 8 is a schematic side elevation view of a portion of the dextral modular mast, not ;
• FIG. 9 is a schematic front elevation view of a portion of the dextral modular mast, cale;
• FIG. 10 is a schematic side elevation view of an embodiment of the sinistral carriage, cale;
• FIG. 11 is a schematic side elevation view of an embodiment of the dextral carriage, not to scale;
• FIG. 12 is a schematic top plan view of an embodiment of the sinistral carriage, not to scale
• FIG. 13 is a schematic top plan view of an embodiment of the sinistral carriage, not to scale
• FIG. 14 is a schematic top plan view of an embodiment of the sinistral carriage, not to scale
• FIG. 15 is a schematic top plan view of an embodiment of the sinistral carriage, not to scale
• FIG. 16 is a schematic top plan view of an embodiment of the multifunction rail, not to scale
• FIG. 17 is a schematic front elevation view of an embodiment of the multifunction rail, not to scale;
• FIG. 18 is a schematic top plan view of an embodiment of the multifunction rail, not to scale;
• FIG. 19 is a schematic front elevation view of an embodiment of the multifunction rail, not to scale.
• FIG. 20 is a schematic top plan view of ari embodiment of the multifunction rail, not to scale;
• FIG. 21 is a schematic front elevation view of an embodiment of the multifunction rail, not to scale
• FIG. 22 is a schematic elevated perspective view of an embodiment of the multifunction rail and platform mast stabilizer, not to scale;
• FIG. 23 is a schematic top plan view of an embodiment of the multifunction rail and platform mast stabilizer, not to scale;
• FIG. 24 is a schematic top plan view of an embodiment of the multifunction rail and platform mast stabilizer, not to scale;
• FIG. 25 is a schematic partial cross-section of several elements of the present invention, not to scale;
• FIG. 26 is a schematic partial cross-section of several elements of the present invention, not to scale;
• FIG. 27 is a schematic partial cross-section of several elements of the present invention, not to scale;
• FIG. 28 is a schematic partial cross-section of several elements of the present invention, not to scale;
• FIG. 29 is a schematic partial cross-section of several elements of the present invention, not to scale
• FIG. 30 is a schematic partial cross-section of several elements of the present invention, not to scale
• FIG. 31 is a schematic front elevation view of a portion of the sinistral modular mast, not to scale
• FIG. 32 is a schematic front elevation view of a portion of the dextral modular mast, not to scale;
• FIG. 33 is a schematic side elevation view of an embodiment of a unit assembly guide, not to scale
• FIG. 34 is a schematic side elevation view of an embodiment of a unit assembly guide, not to scale
• FIG. 35 is a schematic top plan view of an embodiment of the sinistral modular mast and multifunction rails, not to scale.
• FIG. 36 is a schematic top plan view of an embodiment of the dextral modular mast and multifunction rails, not to scale.
• the self-erecting suspension platform system (10) of the instant invention enables a significant advance in the state of the art.
• the preferred embodiments of the device accomplish this by new and novel arrangements of elements and methods that are configured in unique and novel ways and which demonstrate previously unavailable but preferred and desirable capabilities.
• the detailed description set forth below in connection with the drawings is intended merely as a description of the presently preferred embodiments of the invention, and is not intended to represent the only form in which the present invention may be constructed or utilized.
• the description sets forth the designs, functions, means, and methods of implementing the invention in connection with the illustrated embodiments. It is to be understood, however, that the same or equivalent functions and features may be accomplished by different embodiments that are also intended to be encompassed within the spirit and scope of the invention.
• the present invention is a self-erecting suspension platform system (10) intended for use in the construction, maintenance, and cleaning of structures, or any other access solution.
• the platform system (10) comprises a work platform (300) located between a sinistral modular mast (100) and a dextral modular mast (200), wherein a hoisting system (400) suspends the work platform (300) from the modular masts (100, 200).
• a hoisting system (400) suspends the work platform (300) from the modular masts (100, 200).
• the modular masts (100, 200) will be disclosed in detail.
• the sinistral modular mast (100), illustrated in FIG. 7, has at least a second sinistral mast unit (110b) stacked vertically on, and releasably attached to, a first sinistral mast unit (110a).
• the first sinistral mast unit (110a) and the second sinistral mast unit (110b) are substantially identical.
• Each sinistral mast unit (110a, 110b) has a distal end (112), a proximal end (114), a multifunction rail (116) extending from the distal end (112) to the proximal end (114) including a plurality of safety engagement devices (117) and a stabilizer guide device (122), illustrated in FIG. 31 only, a unit interconnection device (135), seen in FIG. 7, located substantially near the distal end (112), and a unit assembly guide (140) located substantially near the distal end (112).
• the sinistral modular mast (100) is constructed on a sinistral base plate (113) in contact with the ground for stability and to distribute the load of the sinistral modular mast (100).
• the dextral modular mast (200), seen in FIGS. 8 and 9, has at least a second dextral mast unit (210b) stacked vertically on, and releasably attached to, a first dextral mast unit (210a).
• the first dextral mast unit (210a) and the second dextral mast unit (210b) are substantially identical, and are substantially identical to the sinistral mast units (110a, 110b).
• Each dextral mast unit (210a, 210b) has a distal end (212), a proximal end (214), a multifunction rail (216) extending from the distal end (212) to the proximal end (214) including a plurality of safety engagement devices (217) and a stabilizer guide device (222), seen only in FIG. 32, a unit interconnection device (235) located substantially near the distal end (212), and a unit assembly guide (240) located substantially near the distal end (212).
• the dextral mast units (210a, 210b) are stacked upon one another the multifunction rails (216) of each mast unit (210a, 210b) substantially align.
• i n is constructed on a dextral base plate (213) in contact with the ground for stability and to distribute the load of the dextral modular mast (200).
• the multifunction rails (116, 216) need not be located at the middle of one of the sides of the modular masts (100, 200). In fact, by offsetting the multifunction rails (116, 216) the working platform (300) may be placed closer to the structure upon which work is being performed.
• the sinistral mast units (110a, 110b) are configured such that when a portion of the distal end (112) of a second sinistral mast unit (110b) is placed in contact with the proximal end (114) of the adjacent first sinistral mast unit (110a), during assembly of the sinistral modular mast (100), the unit assembly guide (140) pivotably secures the second sinistral mast unit (110b) to the first sinistral mast unit (HOa) such that the second sinistral mast unit (HOb) may be securely rotated into a vertical position such that the sinistral unit interconnection device (135) attaches the second sinistral mast unit (110b) to the first sinistral mast unit (110a), as seen in FIG. 7.
• the dextral mast units (210a, 210b), illustrated best in FIGS. 3, 8, and 9, are configured such that when a portion of the distal end (212) of a second dextral mast unit (210b) is placed in contact with the proximal end (214) of the adjacent first dextral mast unit (210a), during assembly of the dextral modular mast (200), the unit assembly guide (240) pivotably secures the second dextral mast unit (210b) to the first dextral mast unit (210a) such that the second dextral mast unit (210b) may be securely rotated into a vertical position such that the dextral unit interconnection device (235) attaches the second dextral mast unit (210b) to the first dextral mast unit (110a).
• the dextral modular mast (200) is separated from the sinistral modular mast (100) by a mast separation distance (50).
• the modular mast units (110a, 110b, 210a, 210b) may be virtually any shape and configuration.
• the design and construction of the modular mast units (110a, 110b, 210a, 210b) depends largely on the size and load of the work platform (300), as well as the elevation that the work platform (300) must reach.
• the modular mast units (110a, 110b, 210a, 210b) may be a predetermined size and configuration for use with ten foot long work platforms (300) that will reach an elevation of no more than sixty feet.
• modular mast units (HOa 5 110b, 210a, 210b) for use with longer more heavily loaded work platforms (300) may be a different configuration and level of reinforcing such that for safety concerns the modular mast units (110a, 110b, 210a, 21 Ob) of one particular work platform (300) and application criteria may not be used with modular mast units (110a, 110b, 210a, 210b) of a different work platform (300) and application criteria.
• a triangular cross- sectioned truss construction tower provides the greatest utility, however any number of widely known structural shapes may be used.
• the unit assembly guides (140, 240) may be constructed in any number of effective arrangements.
• the unit assembly guides (140, 240) includes a hook device (142, 242), seen in FIGS. 33 and 34, located substantially near the distal end (112, 212) and configured such that when a portion of the distal end (112, 212) of a second mast unit (110b, 210b) is placed in contact with the proximal end (114, 214) of the adjacent first mast unit (110a, 210a) in the vertical position that the hook device (142, 242) pivotably secures the second mast unit (110b, 210b) to the first mast unit (110a, 210a) such that the second mast unit (110b, 210b) may be securely rotated into a vertical position such that the unit interconnection device (135, 235) attaches the second mast unit (110b, 210b) to the first mast unit (110a, 210a).
• a hook device 142, 242
• the unit interconnection devices (135, 235) may be constructed in any number of effective arrangements. Perhaps the most simple embodiment of the unit interconnection devices (135, 235) barb-type finger, as seen in FIGS. 7 and 8, that deflects and snaps over a portion of the adjacent mast unit (110a, 110b, 210a, 210b), and requires intentional manipulation of the finger to release the adjacent mast unit (110a, 110b, 210a, 210b).
• the work platform (300) serves as the stage upon which a user, or users, works to construct walls, wash windows, or any number of other elevated tasks.
• the work platform (300) has a sinistral end (302) and a dextral end (304), as seen in FIG. 3. Since the work platform (300) is designed to be suspended between the sinistral modular mast (100) and the dextral modular mast (200), the distance from the sinistral end (302) to the dextral end (304) of the work platform (300) is less than, or substantially equal to, the mast separation distance (50), shown in FIG. 5.
• the work platform (300) is located between the sinistral modular mast (100) and the dextral modular mast (200) such that the work platform sinistral end (302) is adjacent to the sinistral modular mast (100) and the work platform dextral end (304) is adjacent to the dextral modular mast (200).
• the work platform (300) has a railing (310), seen in FIG. 3.
• the work platform (300) also has a sinistral mast stabilizer (320) and a dextral mast stabilizer (330) attached to the platform (300) and configured to cooperate with the sinistral and dextral mast stabilizer guide device (122, 222), seen in FIGS.
• the work platform (300) has a sinistral platform mast engager (340) and a dextral platform mast engager (350) attached to the platform (300) and configured to cooperate with at least one of the plurality of sinistral and dextral mast safety engagement devices (117, 217) of the sinistral and dextral mast multifunction rails (116, 216) to releasably lock the platform (300) to the modular mast (100, 200) thereby preventing unintentional descent of the platform (300).
• the hoisting system (400) suspends the working platform (300) from the sinistral modular mast (100) and the dextral modular mast (200).
• the hoisting system (400) includes (a) a sinistral carriage (450), (b) a dextral carriage (470), (c) a sinistral mast hoist (430), (d) a dextral mast hoist (440), (e) a sinistral mast cable (410), and (f) a dextral mast cable (420).
• the sinistral carriage (450) is adapted to cooperatively receive the sinistral modular mast (100) so that the sinistral carriage (450) may be conveniently slid up and down the sinistral modular mast (100) by a user.
• the sinistral carriage (450) has a proximal end (466), a distal end (467), a body (452), a cable connector (454), an operator handle (456), and a carriage mast engager (460).
• the carriage mast engager (460) is configured to releasably lock the sinistral carriage (450) to the sinistral modular mast (100) thereby preventing unintentional descent of the sinistral carriage (450).
• the dextral carriage (470) is adapted to cooperatively receive the dextral modular mast (200) so that the dextral carriage (470) may be conveniently slid up and down the dextral modular mast (200) by a user.
• the dextral carriage (470) has a proximal end (486), a distal end (487), a body (472), a cable connector (474), an operator handle (476), and a carriage mast engager (480) to releasably lock the dextral carriage (470) to the dextral modular mast (200) thereby preventing unintentional descent of the dextral carriage (470),
• the sinistral mast hoist (430) is attached to the working platform (300) near the sinistral end (302) and the dextral mast hoist (440) is attached to the working platform (300) near the dextral end (304).
• the sinistral mast cable (410) is attached to the cable connector (454) of the sinistral carriage (450) and the sinistral mast hoist (430) and the dextral mast cable (420) is attached to the cable connector (474) of the dextral carriage (470) and the dextral mast hoist (440) thereby suspending the working platform (300) from the sinistral carriage (450) and the dextral carriage (470).
• the mast hoists (430, 440) adjust the elevation of the working platform (300) by extending and retracting the sinistral mast cable (410) from the sinistral mast hoist (430) and the dextral mast cable (420) from the dextral mast hoist (440).
• the mast hoists (430, 440) are generally commercially available electrically powered hoists, but they may be manual hoist systems.
• the platform system (10) includes a control system (500) having a central control station (510) for user control.
• the central console station (510) is in communication with the sinistral mast hoist (430) and the dextral mast hoist (440) thereby controlling the elevation of the work platform (300) by extending and retracting the sinistral mast cable (410) and the dextral mast cable (420) from the sinistral mast hoist (430) and the dextral mast hoist (440).
• the control system (500) may incorporate any number of electrical interlocks for improved safety.
• the control system (500) may include an accelerometer that activates the safety engagement devices (117, 217) upon sensing a predetermined acceleration or velocity. Additional safety features may include top limit switch(s), bottom limit switch(s), and a payload overload detection system.
• the plurality of safety engagement devices (117, 217) of the multifunction rails (116, 216) may be formed as locking recesses (118, 218) formed in the multifunction rail (116, 216) in some embodiments, as seen in FIGS. 17 and 22, and may be formed as locking projections (119, 219) extending from the multifunction rail (116, 216) in other embodiments, as seen in FIGS. 19, 20, and 23.
• the locking recesses (118, 218) of FIGS. 17 and 22 formed in the multifunction rail (116, 216) are generally openings that extend all the way through the multifunction rail (116, 216), however they may simply be recesses formed in the multifunction rail (116, 216).
• the sinistral carriage mast engager (460) and the dextral mast engager (480) cooperate with their associated modular mast (100, 200) to prevent unintentional descent of the carriages (450, 470).
• the carriage mast engagers (460, 480) may be virtually any device that can selectively lock the associated carriage (450, 470) to the associated mast (100, 200).
• Most embodiments the carriage mast engagers (460, 480) include some form of a locking tongue. For instance, one embodiment, illustrated in FIGS.
• a sinistral carriage locking tongue (462) formed to cooperate with the sinistral locking recesses (118) so that the sinistral carriage locking tongue (462) can extend into, and retract from, any one of the sinistral locking recesses (118) to releasably secure the sinistral carriage (450) to the sinistral multifunction rail (116).
• the dextral carriage mast engager (480) includes a dextral carriage locking tongue (482) formed to cooperate with the dextral locking recesses (218) so that the dextral carriage locking tongue (482) can extend into, and retract from, any one of the dextral locking recesses (218) to releasably secure the dextral carriage (470) to the dextral multifunction rail (216), not illustrated but identical to FIGS. 25 and 26.
• the carriage mast engagers (460, 480) may directly attach to the mast (100, 200), not the multifunction rail (116, 216).
• the actuation of the carriage locking tongues (462, 482) may be manually initiated by the force of the user or may be power actuated via hydraulics, pneumatics, or electromagnetics, just to name a few power sources.
• the work platform (300) incorporates a sinistral platform mast engager (340) and a dextral platform mast engager (350), seen in FIG. 3, both of which are attached to the platform (300), configured to cooperate with at least one of the plurality of sinistral and dextral mast safety engagement devices (117, 217) of the sinistral and dextral mast multifunction rails (116, 216).
• the platform mast engagers (340, 350) serve to releasably lock the platform (300) to the modular masts ( 100, 200) via the multifunction rails (116, 216) thereby preventing unintentional descent of the platform (300).
• the platform mast engagers (340, 350) may be virtually any device that can selectively lock the associated side of the work platform (302, 304) to the associated multifunction rail (116, 216). Most embodiments the platform mast engagers (340, 350) include some form of a locking tongue. For instance, one embodiment, illustrated in FIGS.
• a sinistral platform locking tongue (342) formed to cooperate with the sinistral locking recesses (118) so that the sinistral platform locking tongue (342) can extend into, and retract from, any one of the sinistral locking recesses (118) to releasably secure the work platform sinistral end (302) to the sinistral multifunction rail (116).
• the dextral platform mast engager (350) includes a dextral platform locking tongue (352) formed to cooperate with the dextral locking recesses (218) so that the dextral platform locking tongue (352) can extend into, and retract from, any one of the dextral locking recesses (218) to releasably secure the work platform dextral end (304) to the dextral multifunction rail (216), not illustrated but identical to FIGS. 25 and 26.
• the plurality of safety engagement devices (117, 217) of the multifunction rails (116, 216) may be formed as locking projections (119, 219) extending from the multifunction rail (116, 216), as seen in FIGS. 18-21.
• the plurality of sinistral safety engagement devices (117) are sinistral locking
• 1,7 projections (119) extending from the sinistral multifunction rail (116), and the plurality of dextral safety engagement devices (217) are dextral locking projections (219) extending from the dextral multifunction rail (216). Similar to the embodiments previously described, most embodiments incorporating locking projections (119, 219) also incorporate carriage mast engagers (460, 480) in the form of a locking tongue that cooperates with the locking projections (119, 219).
• the sinistral carriage mast engager (460) includes a sinistral carriage locking tongue (462) formed to cooperate with the sinistral locking projections (119) so that the sinistral carriage locking tongue (462) can engage with, and disengage from, any one of the sinistral locking projections (119) to releasably secure the sinistral carriage (450) to the sinistral multifunction rail (116), as seen in FIGS.
• the dextral carriage mast engager (480) includes a dextral carriage locking tongue (482) formed to cooperate with the dextral locking projections (219) so that the dextral carriage locking tongue (482) can engage with, and disengage from, any one of the dextral locking projections (219) to releasably secure the dextral carriage (470) to the dextral multifunction rail (216), not illustrated but similar to FIGS. 27 and 28.
• the actuation of the carriage locking tongues (462, 482) may be manually initiated by the force of the user or may be power actuated via hydraulics, pneumatics, or electromagnetics, just to name a few power sources. In one particular embodiment seen in FIGS.
• the carriage operator handle (456, 476) includes a engager activation device (457, 477) that activates and deactivates the carriage mast engager (460, 480) to releasably lock the carriage (450, 470) to the modular mast (100, 200) thereby preventing unintentional descent of the carriage (450, 470).
• the work platform (300) incorporates a sinistral platform mast engager (340) and a dextral platform mast engager (350), both of which are attached to the platform (300), configured to cooperate with at least one of the plurality of sinistral and dextral mast locking projections (119, 219) of the sinistral and dextral mast multifunction rails (116, 216).
• the platform mast engagers (340, 350) serve to releasably lock the platform (300) to the modular masts (100, 200) via the multifunction rails (116, 216) thereby preventing unintentional descent of the platform (300), as seen in one embodiment in FIGS. 25 and 26.
• the platform mast engagers (340, 350) may be virtually any device that can selectively lock the associated side of the work platform (302, 304) to the associated multifunction rail (116, 216).
• Most embodiments of the platform mast engagers (340, 350) include some form of a locking tongue.
• one embodiment includes a sinistral platform locking tongue (342) formed to cooperate with the sinistral locking projection (119) so that the sinistral platform locking tongue (342) can engage and disengage any one of the sinistral locking projections (119) to releasably secure the work platform sinistral end (302) to the sinistral multifunction rail (116).
• the dextral platform mast engager (350) includes a dextral platform locking tongue (352) formed to cooperate with the dextral locking projections (219) so that the dextral platform locking tongue (352) can engage and disengage any one of the dextral locking projections (219) to releasably secure the work platform dextral end (304) to the dextral multifunction rail (216).
• the sinistral carriage locking tongue (462) is a locking wedge (463) rigidly attached to the sinistral carriage (450) below the sinistral cable connector (454) and at, or above, the sinistral carriage proximal end (466).
• the dextral carriage cable connector (474) is located substantially at the dextral carriage distal end (477) and the dextral carriage locking tongue (472) is a locking wedge (483) rigidly attached to the dextral carriage (470) below the dextral cable connector (474) and at, or above, the dextral carriage proximal end (476), not illustrated by similar to FIGS. 27 and 28.
• the sinistral carriage locking wedge (463) and the sinistral carriage proximal end (466) must be moved away from the sinistral locking projections (119) so that the sinistral carriage locking wedge (463) may pass the sinistral locking projections (119) as the sinistral carriage (450) traverses the sinistral modular mast (100), as seen in FIG. 28.
• Such movement is generally accomplished by the user grabbing the operator handle (456) and rotating the carriage (450) as it is lifted, as indicated by the rotation arrow labeled R.
• the dextral carriage locking wedge (483) and the dextral carriage proximal end (486) must be moved away from the dextral locking projections (219) so that the dextral carriage locking wedge (483) may pass the dextral locking projections (219) as the dextral carriage (470) traverses the dextral modular mast (200). Therefore, upon application of a suspension force (SF) on the sinistral carriage cable connector (454) the sinistral carriage locking wedge (463) engages at least one sinistral locking projection (119) thereby preventing movement of the sinistral carriage (450), as seen in FIG. 27.
• SF suspension force
• the dextral carriage locking wedge (483) engages at least one dextral locking projection (219) thereby preventing movement of the dextral carriage (470).
• application of a suspension load on the cable connectors (454, 474), along with their location, creates a moment that tends to force the fixed locking wedges (463, 483) into the safety engagement device (117, 217) ensuring a reliable engagement of the carriage (450, 470) and the modular mast (100, 200).
• the carriage locking tongues (462, 482) may be biased locking pawls (464, 484) attached to the carriages (450, 470), as seen in FIGS. 29 and 30.
• the carriage (450, 470) is forced upward and the carriage biased locking pawl (464, 484) pivots as it contacts the locking projections (119, 219), or the locking recesses (118, 218), so that the carriage (450, 470) may pass the locking projections (119, 219) as the carriage (450, 470) traverses the modular mast (100, 200).
• the biased locking pawl (464, 484) snaps back into an engaged position, due to the biased nature of the pawl, as soon as it passes the locking projections (119, 219), or locking recesses (118, 218).
• the carriage biased locking pawl (464, 484) engages at least one locking projection (119, 219), or locking recesses (118, 218) thereby preventing movement of the carriage (450, 470). While FIGS. 29 and 30 only illustrate the sinistral elements with respect locking recesses (118), one with skill in the art will appreciate that the biased locking pawl (464) applies equally as well to a dextral biased locking pawl (484), as well as biased locking pawls (464, 484) for use with locking projections (119, 219).
• the work platform (300) also has a sinistral mast stabilizer (320) and a dextral mast stabilizer (330) attached to the platform (300), illustrated in FIG. 5, and configured to cooperate with the sinistral and dextral mast stabilizer guide device (122, 222), seen in FIGS. 31 and 32, of the sinistral and dextral mast multifunction rails (116, 216) to prevent undesired swaying of the suspended work platform (300).
• the sinistral stabilizer guide device (122) is integral to the sinistral multifunction rail (116) and the dextral stabilizer guide device (222) is integral to the dextral multifunction rail (216).
• the work platform sinistral mast stabilizer (320) includes at least one sinistral platform roller (322) in rolling contact with the sinistral stabilizer guide device (122) to prevent swaying of the suspended work platform (300) and the work platform dextral mast stabilizer (330) includes at least one dextral platform roller (332) in rolling contact with the dextral stabilizer guide device (222) to prevent swaying of the suspended work platform (300).
• the sinistral and dextral multifunction rails (116, 216) are U- shaped multifunction rails (125, 225), illustrated in FIGS. 16-19 with respect to the sinistral elements, having a bearing surface (126, 226), a first sidewall (127, 227), and a second sidewall (128, 228).
• the mast stabilizers (320, 330) are retained between the first sidewall (127, 227) and the second sidewall (128, 228), as seen in FIG. 22.
• the sinistral and dextral multifunction rails (116, 216) may be V-shaped multifunction rails (130, 230) having a first bearing surface (131, 231) substantially orthogonal to a second bearing surface (132, 232), as seen in FIG. 23.
• the mast stabilizers (320, 330) are retained between the first bearing surface (131, 232) and the second bearing surface (132, 232).
• This embodiment is particularly unique in that the multifunction rails (116, 216) may incorporate locking projections (119, 219) extending from the rails (116, 216) that do not interfere with the movement and wear of the mast stabilizers (320, 330).
• the carriages (450, 470) may be constructed in a number of arrangements.
• the carriage bodies (452, 472) may completely encircle the modular mast perimeters (145, 245), as seen in FIG. 14, or the carriage bodies (452, 472) may only partially enclose the modular masts (100, 200), as seen in FIG. 15. Further, the carriages (450, 470) may include a guide (458, 478) configured to cooperate with the associated multifunction rail (116, 216) and constrain the movement of the carriage (450, 470) on the modular mast (100, 200), as seen in FIGS. 12 and 13. As seen in FIGS.
• the operator handle (456, 476) of the carriage (450, 470) generally extends beyond the distal end (467, 487) of the carriage (450, 470) so that the user can easily maneuver the carriage (450, 470) to an elevation beyond the normal reach of the user. Additionally, the construction of the carriages (450, 470) generally varies with the type of safety engagement devices (117, 217).
• the carriage (450, 470) must fit relatively loosely around the modular masts (100, 200) so that the carriage locking wedges (463, 483) may be moved by manipulation of the carriage (450, 470) to pass the locking projections (119, 219), as seen in FIGS. 27 and 28.
• embodiments having safety engagement devices (117, 217) that simply extend and retract, as in the embodiments of FIGS. 25 and 26, or rotate such as the biased locking pawls (344, 444) of FIGS. 29 and 30, to lock the carriages (450, 470) to the modular masts (100, 200) may have much tighter fits between the carriages (450, 470) and the modular masts (100, 200).
• Operation of the system (10) begins with the positioning of the fist mast units (110a, 210a) and the work platform (300), as seen in FIG. 3.
• second mast units (110b, 210b) are lifted so that at least one portion of the second mast unit (110b, 210b) may be positioned on top of a portion of the first mast unit (110a, 210a).
• This positioning allows the user to use the unit assembly guide (140, 240) to permit secure rotation of the second mast unit (110b, 210b) into place.
• the unit interconnection devices (135, 235) seen in FIGS.
• the mast units (110a, 110b, 210a, 210b) may also be releasably secured together with traditional fastening devices such as bolts.
• the first pair of second mast units (110b, 210b) are generally installed with the carriages (450, 470) already in place, as seen in FIG. 3.
• the hoisting system cables (410, 420) are attached to the cable connectors (454, 474) and the hoists (430, 440).
• the hoists (430, 440) are then activated at the central control console (510) thereby drawing the cables (410, 420) taunt and lifting the work platform (300) to the position shown in FIG. 5.
• the platform mast engagers (330, 340) are activated to secure the work platform (300) to the masts (100, 200).
• the user may install a third set of modular mast units (110c, 210c).
• a portion of the cables (410, 420) may be withdrawn from the hoists (430, 440) allowing the user to advance the carriages (450, 470) to the proximal end (114, 214) of the third set of modular mast units (110c, 210c), at which point the carriages (450, 470) are locked to the masts (100, 200).
• An alternative embodiment includes secondary safety cables that may be attached from the work platform (300) to the masts (100, 200) as the carriages (450, 470) are moved so that the security of the work platform (300) is not solely dependent on the platform mast engagers (340, 350) as the carriages (450, 470) are moved.
• the hoists (430, 440) contain enough cable (410, 420) such that the work platform (300) may be lowered from the highest elevation to the ground without having to reposition the carriages (450, 470). Such is particularly beneficial when the user needs to return the work platform (300) to ground level to obtain more supplies or take a break.
• each modular mast (100, 200) may have more than one multifunction rail (116, 216), as seen in FIGS. 35 and 36. This is particularly beneficial when multiple work platforms (300) are used next to one another. For instance, two work platforms (300) may be installed adjacent to one another thereby sharing a modular mast (100, 200) such that only three modular masts are needed for the operation of two work platforms (300). This concept extends to job sites utilizing ten or more work platforms (300) to facilitate work on an entire face of a structure.
• the self-erecting suspension platform answers a long felt need for a relatively safe work platform designed to be suspended between a plurality of modular masts.
• the self- erecting suspension platform is used in the construction, maintenance, and cleaning of structures.
• the platform has utility, among other uses, in construction of walls, to wash windows, or any number of other elevated tasks.
• the present invention discloses a work platform suspended between a sinistral modular mast and the dextral modular mast.
• the work platform has stabilizers that cooperate with the masts, redundant safety mechanisms to prevent unintentional descent of the platform, and is raised and lowered by a hoist system.

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• Engineering & Computer Science (AREA)
• Architecture (AREA)
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• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
• Warehouses Or Storage Devices (AREA)
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• 2005
  • 2005-06-29 US US11/170,684 patent/US20070000724A1/en not_active Abandoned
• 2006
  • 2006-05-17 AU AU2006266424A patent/AU2006266424B2/en not_active Ceased
  • 2006-05-17 EP EP06759935A patent/EP1904699A2/en not_active Withdrawn
  • 2006-05-17 CN CN201010156260XA patent/CN101906869B/zh not_active Expired - Fee Related
  • 2006-05-17 CN CN2006800297613A patent/CN101243231B/zh not_active Expired - Fee Related
  • 2006-05-17 WO PCT/US2006/018936 patent/WO2007005122A2/en active Application Filing

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