FIELD OF THE INVENTION
The present invention relates to a suspension system for assisting a user with reduced mobility to navigate a staircase.
BACKGROUND OF THE INVENTION
People with reduced mobility, for example senior citizens or people recovering from injuries, often encounter issues when they live in multi-story homes. Climbing or descending staircases can pose many dangers to them as they risk falling and injuring themselves. In addition, due to their reduced mobility, they may simply be incapable of navigating the stairs on their own. While many senior citizens leave their homes and move into seniors' residences at a certain point, these residences are often quite expensive. Further, many senior citizens are opposed to moving into a seniors' residence because they want to maintain their independence.
Currently, there exist multiple systems to assist people with reduced mobility to climb or descend staircases. For example, stair lifts are commonly used to carry people with reduced mobility up and down stairs. While these systems reduce the risk of falling, they are often quite expensive. In addition, many staircases are not compatible for stair lift installations, for example because they are too narrow or follow an abnormal path. Finally, while systems such as stair lifts provide a safe way for people with reduced mobility to navigate staircases, they do not offer the typical cardiovascular benefits that are associated with manually climbing and descending stairs with one's legs.
As such, there exists a need for a system that allows people with reduced mobility to safely navigate stairs without the risk of falling while promoting good cardiovascular health.
SUMMARY OF THE INVENTION
In order to address the above drawbacks, there is provided a suspension system for assisting a user to navigate a staircase, the suspension system comprising: a beam positioned above the staircase; a carriage displaceable along said beam between a first position at the bottom of the staircase and a second position at the top of the staircase; a harness securable to the user, said harness being operably connectable to said carriage such that said carriage follows the user as the user navigates the staircase; and a brake operably connected to said carriage for braking said carriage; wherein if the user falls while navigating the staircase, said brake stops said carriage in place and the user is suspended above the staircase.
In an embodiment, there is also provided method for installing the suspension system, the method comprising steps of: securing the beam to the ceiling above the staircase; securing the carriage to said beam, said carriage being displaceable along said beam between the first position at the bottom of the staircase and the second position at the top of the staircase; and attaching connection means to said carriage, said connection means connecting a harness to said beam, said harness to be worn by the user when navigating the staircase such that said carriage follows the user.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1A is a front schematic view of a suspension system, in accordance with an illustrative embodiment of the present invention;
FIG. 1B is a perspective schematic view of a beam-mounted harness for a suspension system, in accordance with an illustrative embodiment of the present invention;
FIG. 2 is a front schematic view of a beam and carriage for a suspension system, in accordance with an illustrative embodiment of the present invention;
FIGS. 3A and 3B are perspective schematic views of a rolling carriage for a suspension system, in accordance with an illustrative embodiment of the present invention;
FIG. 3C is a cut side schematic view along line IIIC-IIIC in FIG. 3B;
FIG. 4A is a front schematic view of a rolling carriage for a suspension system, in accordance with an illustrative embodiment of the present invention;
FIG. 4B is an isolated perspective schematic view of a wheel for a suspension system, in accordance with an illustrative embodiment of the present invention; and
FIG. 5 is a top plan view of staircase with a suspension system, in accordance with an illustrative embodiment of the present invention.
DETAILED DESCRIPTION OF THE ILLUSTRATIVE EMBODIMENTS
Referring to FIG. 1A, there is shown a suspension system, generally referred to by the reference numeral 2, for assisting a user 4 with reduced mobility to navigate a staircase 6. User's 4 mobility may be reduced due to one or more of a plurality of reasons such as age, illness and injury, among others. The suspension system 2 comprises a beam 8 positioned above the staircase 6 and secured to a ceiling 10 above the staircase 6 by a plurality of anchors 12. When the user 4 wishes to securely navigate the staircase 6, either by climbing or descending the staircase 6, they are provided with a harness 14 linked to beam 8 by connection means 16 and to a carriage 18 displaceable or rollable along the beam 8, as will be discussed in further detail below. As such, the carriage 18 follows the user 4 as they navigate the staircase 6, and if the user 4 were to fall, for example by stumbling, missing a step, or tripping, they will be supported by the suspension system 2 to prevent any possible injuries. In order to follow the user 4, the carriage 18 is slideable along the beam 8 between a first position at the bottom of the staircase 6 and a second position at the top of the staircase 6. In an embodiment, the appearance of the harness 14 resembles a rescue-type safety vest.
Referring now to FIG. 1B in addition to FIG. 1A, in an embodiment, connection means 16 comprise a semi-rigid rubber rod 20 connected to the harness 14 via a hook 22 comprising, for example, a resealable latch or a carabiner (not shown). At least one clamp 24, illustratively two clamps 24, ensure that the semi-rigid rubber rod 20 remains substantially vertical as the user 4 navigates the staircase 6. As the user 4 navigates the staircase 6, the semi-rigid rubber rod 20 guides the movement of the carriage 18 without impeding the user's 4 movements. Further, an elastic rope 26 connects the semi-rigid rubber rod 20 to the carriage 18. The elasticity of the elastic rope 26 provides greater flexibility to the user 4 as they navigate the staircase 6 and aids in dampening a possible fall of the user 4. In an embodiment, the elastic rope 26 has a length of about three inches.
Referring now to FIG. 2 in addition to FIG. 1A, each anchor 12 secures the beam 8 to the ceiling 10 via an anchor hook 28 that latches into one of a plurality of pre-fabricated holes 30 in the beam 8. In an embodiment, each anchor 12 comprises a braided steel cable. Further, the carriage 18 connects to a swing 32 via a pivot 34 and the swing 32 connects the carriage 18 to the elastic rope 26. The pivot 34 allows the swing to better follow the motion of the user 4, increasing the flexibility of the carriage 18. Thus, as the user 4 climbs or descends the staircase 6, the pivot 34 allows the swing 32 to rotate which allows the semi-rigid rubber rod (20) to remain substantially vertical regardless of the position of the user 4 on the staircase 6. A plurality of wheels 36 allow the carriage 18 to roll along the beam 8 as the user 4 navigates the staircase 6, as will be discussed in further detail below.
Referring now to FIGS. 3A-3C, a plurality of teeth 38 are embedded into the top of beam 8. Carriage 18 comprises a plurality of springs 40 transferring loads from the semi-rigid rubber rod 20 to the carriage 18. Carriage 18 further comprises braking means 42, illustratively a stopper, connected to each spring 40 and adjacent to the teeth 38. In ordinary use, when there is no load acting upon the springs 40, braking means 42 are held above the teeth 38 without making contact, allowing the carriage 18 to roll freely along the beam 8 as it follows the user's 4 movements. However, if the spring 40 is subjected to the weight of the user 4, for example if the user 4 were to fall, the braking means 42 are activated and engage with the teeth 38, stopping the displacement of the carriage 18 along the beam 8. As such, the springs 40 only allow the carriage 18 to roll if no weight from the user 4 is exerted upon them. In addition, the springs 40, similarly to the elastic rope 26, aid in dampening the fall of the user 4. As such, if the user 4 were to fall, the suspension system 2 would ensure that they would not make impact with the staircase 6 but rather be gently suspended over the staircase 6 unharmed. In an embodiment, a fall detection system (not shown) is provided comprising a sensor (not shown) positioned adjacent to one of the springs 40 and configured to detect a fall of the user 4 and send an alert signal to external personnel through a wireless network (not shown), for example via a WIFI network to a mobile device.
Referring now to FIGS. 4A-4B, at least one of the wheels 36 comprises an adjacent toothed wheel 44 that rotates along with its respective wheel 36. A hinged tab 46, illustratively a flexible plastic tab, sits above the toothed wheel 44 and makes contact with the teeth of the toothed wheel 44 as the toothed wheel 44 rotates for descending the stairs. The hinged tab 46 exerts enough resistance on the toothed wheel 44 to prevent the carriage 18 from unpromptedly advancing past the user 4 when the user 4 is descending the staircase 6. However, the hinged tab 46 does not apply resistance against the toothed wheel 44 when the user 4 is climbing the staircase 6. In an embodiment, each wheel 36 comprises ball bearings (not shown) to reduce rotational friction and handling stress.
Referring now to FIG. 5, at each end of the staircase 6 there is a storage cabinet 48. Each storage cabinet 48 is configured to house the harness 14 when the user 4 is not navigating the staircase 6. As such, when the user 4 wishes to navigate the staircase 6, they may remove the harness 14 from the corresponding storage cabinet 48 and secure it to themselves. Alternatively, the user 4 may receive assistance when putting on the harness 14. Further, in an embodiment, the beam 8 comprises a plurality of interlocking sections or modules (not shown), allowing the beam 8 to follow the pathway of the staircase 6 regardless of its shape, for example a curved staircase, an angled staircase or a spiralling staircase. Each section of the beam 8 interlocks with adjacent beam sections at their upper surfaces, allowing the carriage 18 to roll along the beam 8 smoothly. In a further embodiment, the beam 8 is positioned to be slightly off-center from the staircase 6 so that the connection means 16 are less obtrusive to the user 4 as they navigate the staircase 6.
The scope of the claims should not be limited by the preferred embodiments set forth in the examples but should be given the broadest interpretation consistent with the description as a whole.
Patent Grant
11622907
