The invention relates to grab bars used as aids by the elderly and by persons with disabilities. In particular, the invention relates to a grab bar apparatus wherein the position of the grab bar is easily and quickly adjusted, and is self-locking at any selected position.
Grab bars of various designs, structures, sizes, and finishes are commonly installed in bathrooms and other rooms of homes or facilities to aid elderly persons and persons with disabilities. These are generally mounted to a fixed location on a wall, ceiling, or floor proximate to where they are needed, to help such persons access a toilet, bathtub, bed, stairs, etc. Some existing grab bar designs are said to be adjustable in position and/or height. The adjustment may require tools and at least partial dismounting and remounting of one or more components to reposition the grab bar to its new position and/or height. Other designs may be more conveniently adjusted. For example, a currently-available bathtub grab bar employs a stainless steel locking mechanism to adjust height. However, the locking mechanism is difficult to operate by a person with limited dexterity or strength, and generally requires the assistance of a second person. Also known are flip-up safety bars and rails; however these also employ locking mechanisms that present obstacles to individuals with limited dexterity or strength, or with disabilities. Thus, although some prior grab bar designs include a user-adjustable feature, these often cannot easily be adjusted by the intended users on an as-needed basis to meet specific requirements.
According to one aspect of the invention there is provided an adjustable grab bar apparatus, comprising: a first member having a first end that is adapted to be fixed to a substrate, and a second end; a second member that engages the first member, wherein longitudinal axes of the first member and the second member are substantially aligned; a drive mechanism that is adapted to propel the second member relative to the first member in first and second directions that are substantially parallel to the longitudinal axes of the first member and the second member; and a grab bar attached to a location on the second member such that the grab bar is propelled together with the second member in the first and second directions; wherein the drive mechanism is self-locking.
According to another aspect of the invention, there is provided an adjustable grab bar apparatus, comprising: a first member comprising a support structure that is adapted to be attached to a surface; a drive mechanism fixed to the first member, the drive mechanism being adapted to engage a second member and to advance and retract the second member relative to the first member; and a grab bar attached the second member such that the grab bar is advanced and retracted together with the second member; wherein the drive mechanism is self-locking.
According to one embodiment, the grab bar is raised when the second member is advanced and is lowered when the second member is retracted.
According to various embodiments, the drive mechanism may comprise a gear train, and the gear train may comprise a worm and a worm gear.
According to various embodiments, the drive mechanism may comprise a manual crank or a handwheel.
In one embodiment, the drive mechanism comprises a gear train and an actuator.
In one embodiment, the gear train comprise a worm and a worm gear.
In one embodiment, the actuator comprises a manual crank that drives the worm.
In one embodiment, the drive mechanism comprises an electric motor.
In one embodiment, the drive mechanism comprises an electric motor that drives the worm.
In one embodiment, the actuator includes at least one switch that controls the electric motor, to control propelling the second member in the first direction and second direction.
In one embodiment, the drive mechanism comprises a pressure sensitive mechanism.
In various embodiments, the pressure sensitive mechanism is selected from a hydraulic mechanism and a pneumatic mechanism.
In various embodiments, the actuator includes one or more of a switch, wireless communication, voice activation, proximity sensing, and motion sensing.
According to another aspect of the invention there is provided a method for implementing a grab bar apparatus, comprising: providing a first member having a first end that is adapted to be fixed to a substrate, and a second end; providing a second member that engages the first member, wherein longitudinal axes of the first member and the second member are substantially aligned; attaching the grab bar to a location on the second member; using a drive mechanism to propel the second member relative to the first member in first and second directions that are substantially parallel to the longitudinal axes of the first member and the second member; and wherein propelling the second member in the first direction or the second direction adjusts a position of the grab bar; wherein the drive mechanism is self-locking.
According to another aspect of the invention there is provided a method for implementing a grab bar apparatus, comprising: providing a first member comprising a support structure that is adapted to be attached to a surface; fixing a drive mechanism to the first member, the drive mechanism being adapted to engage a second member and to advance and retract the second member relative to the first member; and attaching the grab bar to the second member such that the grab bar is advanced and retracted together with the second member; wherein the drive mechanism is self-locking.
According to one embodiment, the method includes raising the grab bar when the second member is advanced and lowering the grab bar when the second member is retracted.
According to various embodiments, the method may include using a drive mechanism comprising a gear train, and the gear train may comprise a worm and a worm gear.
According to various embodiments, the drive mechanism may comprise a manual crank or a handwheel, an electric motor, or a pressure sensitive mechanism such as a hydraulic mechanism or a pneumatic mechanism.
Further methods relate to implementing an adjustable grab bar apparatus in accordance with the embodiments described herein.
For a better understanding of the invention and to show more clearly how it may be carried into effect, reference will be made, by way of example, to the accompanying drawings, wherein:
There are deficiencies in existing adjustable grab bar designs that may present difficulties to users. For example, an adjustable feature may require more dexterity or strength than a user is capable of exerting. Alternatively, or additionally, an adjustable feature may not result in correct positioning of the grab bar for all possible users. For example, a person in a wheelchair may require a grab bar at a different height than a person using crutches or a walker. As a result, the specific needs of individuals with physical disabilities often are not met by existing grab bars, which is a significant inconvenience, and in some cases this may dissuade such individuals from going out into their communities.
Embodiments described herein address such deficiencies. According to the embodiments, an adjustable grab bar apparatus is provided that allows a user to easily and quickly position the grab bar to suit his/her particular requirements and capabilities. Embodiments may be used in private homes, retirement and nursing homes, hotels, hospitals, gyms, swimming pools, public facilities, garages, outdoors or indoors, etc. The ease of use of embodiments described herein results in greater independence and confidence in disabled and elderly persons, removing negative factors such as a fear of falling and possible embarrassment, which encourages them to be more outgoing.
Embodiments described herein are easily adjusted by a user without the need for tools and/or additional hardware. Moreover, adjustment may be done by users with impaired dexterity and/or limited strength, since adjustment is accomplished using a simple interface such as a manual crank, a switch (e.g., push-button or touch sensitive), a foot pedal, etc. A feature of the invention is that adjustment of the grab bar is made without the requirement of additional steps or hardware for unlocking and/or locking the grab bar position. That is, embodiments include a self-locking feature wherein the grab bar remains secure at any user-selected position, and adjustment is a simple one-step procedure in that there is no need to disengage a locking mechanism prior to adjusting the grab bar position and/or engage a locking mechanism after adjusting the grab bar position.
A generalized embodiment will now be described with reference to
The grab bar 12 is attached to the second member 10b of the support structure. Preferably, the surface of the grab bar is mostly or completely finished as a slip-resistant surface. For example, the surface may be knurled to enhance grip, or a rubber material or other material may be disposed on the surface. The grab bar may of course be any suitable shape for a given installation or application; the design shown in the figures being merely representative. However, it is noted that the grab bar design shown in the figures has been found well-suited for use in washrooms, and it accommodates a wide range of sizes of users.
The second member 10b of the support structure is moveable along its longitudinal axis. Thus, the second member may be advanced and retracted relative to the drive mechanism 16 to provide height adjustment, shown by the double-ended arrow in
The actuator 14 and drive mechanism 16 may be mounted on member 10a of the support structure. As used herein, the term “actuator” refers to a part of the apparatus that a person uses to adjust the position of the grab bar. For example, an actuator may be a crank handle, a hand wheel, a lever, a switch such as a push button, a foot pedal, etc. In some embodiments, the actuator may comprise a software application executable on a mobile computing device, such as a smartphone.
The drive mechanism may be based on any one of a number of suitable technologies. In one embodiment the drive mechanism may be implemented with a gear train that includes a rack and pinion. For example, the rack may be disposed on the second member 10b of the support structure, and the pinion disposed in a housing that is secured to member 10a, together with the actuator 14.
In other embodiments the drive mechanism may include a pressure-sensitive component, such as a pneumatic mechanism or a hydraulic mechanism. In such embodiments an actuator may include one or more feature that facilitates grab bar position adjustment by a user, similar to those discussed above in respect of an implementation using an electric motor (e.g., a switch (push-button, slider, touch-sensitive, foot-operated, etc.), voice activation, motion sensing, wireless communications). Embodiments include the feature that the drive mechanism is self-locking, such that it automatically maintains the adjusted position selected by the user, without the need for a locking mechanism.
Embodiments have been described primarily with respect to raising and lowering a grab bar, i.e., adjusting the height of a grab bar. This corresponds to moving the grab bar substantially along the vertical or axis of a three-axis coordinate system. It will be appreciated that the approaches described herein, or variants thereof, may be configured to advance and retract a grab bar in a horizontal direction, i.e., along a horizontal axis of a three-axis coordinate system.
It will be understood by those skilled in the art that this description is made with reference to certain embodiments and that it is possible to make other embodiments employing the principles of the invention which fall within its spirit and scope as defined by the claims.
Filing Document | Filing Date | Country | Kind |
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PCT/CA2018/050413 | 4/4/2018 | WO | 00 |
Number | Date | Country | |
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62481152 | Apr 2017 | US |