Grip strength evaluator device

Abstract

The present invention discloses a grip strength evaluator device (100) that includes a dial gauge (104), a connector (108), a bulb (112) and a stabilizer (120) The device (100) also includes a flexible tube (304) that encloses an air flow regulator. When the bulb (112) is pressed, the air travels from the bulb (112) through to the flexible tube (304) and the air flow regulator, both being enclosed in the connector (108) to the dial gauge (104). The entry of air into the dial gauge (104) leads to movement of the pointer (113), that indicates the grip strength of the user on a scale (116). Other embodiments of the present invention include a control valve (620) and automatic deflation valve (ADV) (912) that allow controlled release of air from the device.

Description

[0001] “GRIP STRENGTH EVALUATOR DEVICE”

[0002] FIELD OF THE INVENTION:

[0003] The present invention relates to a strength evaluator device and more particularly to a grip strength evaluator device for evaluating the grip strength and pinch strength of an individual.

[0004] BACKGROUND OF THE INVENTION:

[0005] Grip strength is a measure of muscular strength that is generated by one’s palm and forearm muscles. Recent studies have shown that grip strength is an important indicator of the overall health of a person. In adults, the grip strength of a person indicates the muscle strength, muscle mass, and nutritional status of the individual as well. Whereas, in older or elderly adults, grip strength indicates the overall vitality of the individual including any decline in physical or mental health. So, accurate indication of the grip strength of an individual provides a better prognosis for a person’s health.

[0006] The magnitude of grip and pinch strength needed to perform most activities of daily living tasks and job duties varies. Available grip and pinch strength may also influence our career choice. It is well known that grip strength of the dominant and nondominant hands to be relatively equal regardless of handedness, though the dominant hand may, at times, have a 10% higher strength due to more use. Therefore, improvements in grip strength documented as progress in rehabilitation settings may in fact just represent the day-to-day variability and should be interpreted with caution. Measurement of pinch strength provides information ofthe user’s hand function, assesses fitness for work by quantifying dexterity for fine motor tasks and the like.

[0007] Measuring grip strength and pinch strength further indicates the percentage of hand trauma and disease. Grip strength and pinch strength varies from individual to individual depending on the age, anthropomorphic measurements such as forearm length, perimeter of the middle part of the hand, etc. Therefore, standardized values of hand grip strength have been established. The mean maximum hand grip strength observed among men is 43.4 kg whereas the mean maximum hand grip strength observed in women is 27.6 kg. Average grip strength generally peaks in mid-life (around 30s and 40s) and declines with age.

[0008] A dynamometer is a most widely utilized device for measuring grip strength currently. Dynamometers generally use a spring-based scale that measures force applied in Newton. The most common type of dynamometers used is the Jamar dynamometer where the individual needs to be seated, shoulder relaxed, elbow bent at 90° angle and forearm and wrist in neutral position. Conventionally, grip strength is measured using hand dynamometers. However, these dynamometers are unable to detect minute differences or changes in grip strength due to the scales that they use. Further, standard dynamometers require technical expertise for operating and recording the grip strength of an individual.

[0009] Further, the currently available dynamometers have several issues with standardization of testing position, inconsistent results between testers, and limitations of the device itself, such as handle size affecting grip. A lack of universal standardized body and arm positions lead to questionable inter-tester reliabilitybecause grip strength varies based on arm and body posture. Further, the size and shape of the dynamometer handle influence the measured force, especially with devices like the Jamar dynamometer, which may not adequately reflect fingertip force.

[0010] The Chinese Patent CN 107495975A discloses an arthralgia hand grip strength parameter detection system and a detection method. The system includes a device case, an air bag gripped, gas pressure sensor, data acquisition transport module and the wireless transport module arranged inside device case. The patient maintains the grip force to squeeze the inflatable airbag for 1 to 2 seconds to record the pressure applied and the procedure is repeated for both the hands to generate grip evaluation value. The drawback of this patent is that the operation of the device requires expertise and skilled technicians. Further, this patent is not specific for grip strength indication but for the indication of arthralgia.

[0011] The Chinese Patent CN112401845A discloses a grip strength rehabilitation training device. This device includes a data host (different modules and sensor for detecting air pressure), a strap and a grip ball. The grip ball is connected to the air pressure sensor through the air tube wherein air pressure generated by the grip ball is transmitted in the form of the air pressure value to the main control module. The lamp displays the corresponding air pressure judgment result.

[0012] Therefore, there is a need for a grip strength evaluator device for an individual that provides accurate and precise readings. Further, there is a need for a grip strength evaluator device that also evaluates pinch strength precisely and that allows operation that is not limited to skilled technicians.SUMMARY OF THE INVENTION:

[0013] The present invention discloses a grip strength evaluator device for evaluating grip strength of either hand of a user including a dial gauge, a connector and a bulb, such that the bulb is flexibly squeezable by a user for air to travel from the bulb to the dial gauge through the connector. The connector of the device of the present invention includes an air flow regulator with a wire having an orifice and a cover such that the air flow regulator allows controlled air flow into the dial gauge. Further, the bulb includes a stabilizer with a rubber component and a valve seat that prevents a pointer on a scale of the dial gauge from moving in an opposite direction, away from the zero on the scale.

[0014] Further, the bulb encloses a plurality of polyester fibers, that renders resistance to the bulb when pressed by the user. The device of the present invention evaluates grip strength of the user through the pointer on the scale and the pointer rotates on an axis due to air travelling from the bulb to the dial gauge.

[0015] The scale on the dial gauge is an mm of Hg scale and including a plurality of colour bands such as orange, yellow and green on readings of the grip strength of the user. Further, the air flow regulator includes removal of one or more strands from the wire to create the orifice in the wire and the cover being crimped onto the wire to form a compact assembly that allows controlled flow of air from the bulb to the dial gauge. Further, the air flow regulator is partly enclosed in a flexible tube that is positioned within the connector and that connects the bulb to the dial gauge. Further, the bulb of the present invention includes a stabilizer with a rubbercomponent and a valve seat that prevent air leakage from the bulb into the atmosphere when squeezed.

[0016] A method for evaluating grip with the device includes several steps. A first step includes covering the bulb by the palm of the user and pressing the palm of the user using all his strength for a couple of seconds. A second step includes compressing the bulb and forcing air from the bulb into the dial gauge through the connector. A third step includes movement of the pointer due to entry of air into the dial gauge and pointing at values on the scale, providing the grip strength evaluation of the user. Further, a fourth step includes noting three consecutive grip strength readings of each palm of the user with a rest period of at least 30 seconds in between and a final step including calculating the average of the three noted readings for future reference as required.

[0017] Further, the bulb of the device of the present invention is preferably a shape of a half ovoid, with a flat surface and an opposite side of the bulb is curved for evaluating pinch strength of the user.

[0018] One embodiment of the device of the present invention includes a control valve for pushing air out of the device. The control valve includes a knob that covers an opening with an air flow regulator and the knob being rotatable in a clock-wise or anti-clockwise manner controlling the amount of air being released from the device. Another embodiment of the device of the present invention includes a pair of bulbs and a flexible tube with a fork with two ends and each fork end is connected to a bulb with an automatic deflation valve that enables the user for evaluating grip strength of both palms simultaneously.Another embodiment of the present invention includes a plurality of devices, a display interface, speakers, input device, output device, a database, an intelligent module, a registration module and a reminder module such that the system is configured to collect data on grip strength from the devices, analysing the data to provide trends on the display interface and storing the recorded data in a database for reference of the user.

[0019] Further the bulb of the device of the present invention is preferably shaped as an ovoid, that allows the user to cover the bulb from all sides for optimum evaluation of grip strength. Also, the flexible tube of the device of the present invention is preferably a silicone rubber tube that partially encloses the wire and the crimped cover within it, preventing air leakage from and to the dial gauge. Alternatively, a PVC wire of a slightly bigger diameter, that fits snugly inside the connector to make it leak proof, may be pasted inside the connector with a suitable adhesive instead of using the silicone rubber tube, thus giving the same functional effect.

[0020] Further, the wire of the device of the present invention is a wire made of a plurality of strands being removable to form the orifice thereby allowing controlled flow of air from the bulb to the dial gauge and by crimping with the cover that defines the air flow regulator. Further, the length of the device is approximately in the range of 140 to 160mm, whereas the total diameter of the bulb is in the range of 65 to 85mm. Also, the orifice of the air flow regulator has a size of the diameter of a single or more strands being removed from the wire depending on the utility of the device.BRIEF DESCRIPTION OF DRAWINGS:

[0021] The objectives and advantages of the present invention will become apparent from the following description read in accordance with the accompanying drawings wherein,

[0022] FIG. 1 shows a top perspective view of a grip strength evaluator device of the present invention;

[0023] FIG. 2 shows a side view of the device of FIG. 1;

[0024] FIG. 3 shows the exploded view of the device of FIG. 1;

[0025] FIG. 4 shows a front view of a second embodiment of the device of FIG. 1;

[0026] FIG. 5 shows a side view of the second embodiment of the device of FIG. 1; FIG. 6 shows a perspective view of a third embodiment of the device of FIG. 1; FIG. 7 shows a control valve of the third embodiment of the device of FIG. 1; FIG. 8 shows an exploded view of the control valve of the third embodiment of the device of FIG. 1 ;

[0027] FIG 9 shows a top view of a fourth embodiment of the device of FIG. 1 ;

[0028] FIG. 10 shows a fifth embodiment of the device of FIG. 1; and

[0029] FIG. 11 shows a step wise operation of the device of FIG. 10.

[0030] DESCRIPTION OF THE INVENTION:

[0031] References in the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, characteristic, or function described in connection with the embodiment is included in at least one embodiment of the invention. The appearances of the phrase “in one embodiment” in various places in the specification are not necessarily all referring to the same embodiment.References in the specification to “preferred embodiment” means that a particular feature, structure, characteristic, or function described in detail thereby omitting known constructions and functions for clear description of the present invention.

[0032] The foregoing description of specific embodiments of the present invention have been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the present invention to the precise forms disclosed and obviously many modifications and variations are possible in light of the above teachings.

[0033] The present invention discloses a grip strength evaluator device that includes a dial gauge, a bulb and a connector. The object of the present invention is to provide an effective and economical device that provides a precise grip strength and pinch strength evaluation.

[0034] Referring to FIG. 1 and 2, a grip strength evaluator device, hereinafter referred to as device (100) is described. The device (100) includes a dial gauge (104), a connector (108) and a bulb (112). The connector (108) is centrally located, such that the connector (108) is positioned between the dial gauge (104) and the bulb (112). The connector (108) encloses a flexible tube (NOT SEEN) within it. This flexible tube connects the bulb (112) to the dial gauge (104) from inside the connector (108). The connector (108) allows pressurized airflow to the dial gauge (104), thereby indicating a reading on the dial gauge (104) through a pointer (113).

[0035] The bulb (112) is pressable and is preferably shaped as an ovoid structure. The ovoid shape of the bulb (112) allows the user to optimally squeeze the bulb(112) from all sides. However, other embodiments of the present invention may include bulbs of varied shapes and sizes such as a half ovoid, dome shaped structure, tapered structure, or the like as per the user’s preference and requirement. A person skilled in the art shall appreciate that for optimal grip strength evaluation, optimal and uniform pressure needs to be applied on the bulb (112). Also, each shape of the bulb (112) may be utilized to evaluate different types of strength. For example, one embodiment of the present invention includes a half ovoid bulb that is utilized to evaluate pinch strength. Further, the bulb (112) is preferably made of flexible rubber, Poly-vinyl Chloride and the like.

[0036] In accordance with the present invention, the dial gauge (104) is a circular gauge that includes scale (116). The scale (116) is an mm of Hg scale. Mm of Hg is a manometric unit of pressure that is defined as approximately 133.322 pascals. It is well known in the art that pressure measurement units widely used are Kg / cm2and PSI (Pounds per sq. inch). Further, it is known that 1 Kg / cm sq. is equal to 0.981 Bar, that further equals to 14.223 PSI. Furthermore, 14.223 PSI equals to 735.56 mm of Hg. Therefore, it is to be noted that mm of Hg is a much smaller unit than Kg / cm2or PSI, thus giving much better accuracy. The scale (116) on the dial gauge (104) includes a plurality of graduations (114), each equalizing to 2mm of Hg, that equalizes to 0.0027 Kg / cm2or 0.266Kpa or 266.64 pascals. It is also known that the pressure measured in mm of Hg is a measure properly understood by the medical fraternity and therefore is used in this device in particular.

[0037] In accordance with the present invention, the bulb (112) encloses a plurality of polyester fibers such that the bulb (112) holds a predefined quantity of air. Thiscombination of air and polyester fibers advantageously impart the bulb (112) strength and a firm grip when pressed by a user. If the fixed amount of air and fiber is not present inside the bulb, or if only normal atmospheric air is present inside i.e. the polyester fibers are not present inside the bulb (112) as intended, then bulb (112) feels very soft or mushy when pressed, which affects the grip. For example, in this one embodiment, the volume of air present in the bulb (112) is approximately 60 cm3and mass of fibers is approximately Igm. In other words, the bulb (112) includes Igm of fiber per 60 cm3.

[0038] Further, the bulb (112) also includes a valve (120). The valve (120) is specifically a stabilizer that prevents the pointer (113) in the dial gauge (104) from moving in an opposite direction, away from the zero on the scale (116), once grip strength is evaluated by the user. In accordance with the present invention, the stabilizer (120) is essentially a back valve used to ensure the return of pointer (113) to zero position after every use and not allow it to drift in reverse direction.

[0039] Another embodiment of the present invention includes a scale (116) including a plurality of colour bands. Each colour band represents a grip strength level. The colour bands preferably include orange, yellow and green. Each band denotes the strength of the grip which ranges from weak, normal and strong in line with the standardized values such that orange band depicts the weakest grip strength and green colour band depicts the strongest grip. Further, the dial gauge (104) is connected to the bulb (112) through the connector (108).

[0040] In accordance with the present invention, the total length of the device (100) is preferably approximately 160mm. Further, the length of the bulb (112) isapproximately 85mm and the diameter of the bulb (112) is approximately in the range of 40 to 50 mm. In this particular embodiment, the diameter of the bulb (112) is 43mm. However, a person skilled in the art shall appreciate that the size of the device (100) may differ in other embodiments as per the requirements of the user.

[0041] Referring to FIG. 3, an exploded view of the device (100) is described. The connector (108) of the device (100) encloses a flexible tube (304) that connect the dial gauge (104) to the bulb (112). The flexible tube (304) is preferably a sleeve that connects a wire and cover assembly to the dial gauge (104) and the bulb (112). The device includes an air flow regulator that is defined by a multi-stranded wire (320), an orifice and a cover (324). The air regulator is a passive airflow-regulating structure with the stranded wire (320) having at least one strand removed to define the micro-orifice, and the cover (324) crimped over the wire (320) to maintain the orifice and regulate airflow through the device.

[0042] In accordance with the present invention, the flexible tube (304) encloses a portion of the wire (320) and the cover (324). The metal cover (324) is preferably crimped or pressed on to the wire (320) that affixes the wire in position within the flexible tube (304). Further, the flexible tube (304) is a hollow structure that accommodates the wire (320) with the cover (324) on it. In accordance with the present invention, the flexible tube (304) is preferably made of material such as flexible rubber, silicone and the like. Further, the cover (324) is a metal cover, preferably made of material such as brass, steel or stainless steel. However, a person skilled in the art shall appreciate that the flexible tube (304) and cover (324) may be made of any type of suitable material as per the requirement of the user. Further,it is noted that the wire (320) is a multi-strand wire, such that each strand within the wire (320) is preferably made of copper.

[0043] The wire (320) is preferably an electrical PVC wire. It is noted that this wire (320) is defined by a plurality of strands. It is understood that a stranded wire (320) is a type of a conductor made up of multiple, small gauge strands that are twisted or bundled together. This stranded wire (320) is enclosed by the flexible tube (304) tightly and further, the flexible tube (304) is enclosed inside the connector (108) of the dial gauge (104) tightly.

[0044] In accordance with the present invention, one or more strands are removed permanently from the wire (320) to create an orifice of the desired size inside the wire (320), thereby forming a path for to and fro movement of pressurized air from the bulb to the gauge and vice a versa. For example, in a first case, a wire having a diameter of 2.4 mm includes 32 strands of 0.17 mm and the orifice is defined by removing one strand out of the 32. Accordingly, the diameter of the orifice shall be 0.17 mm. In another case, a wire having a diameter of 1.26mm includes 14 strands of 0.16 mm and the orifice is defined by removing one strand out of the 14. Accordingly, the orifice diameter shall be 0.16 mm.

[0045] In accordance with the present invention, the orifice achieved by removing strands from the wire (320) is changeable. The diameter of the orifice is changed by squeezing a cover (324) on the wire (320). The controlled squeezing of the cover (324) on the wire (320) is termed as crimping, which is preferably done on a press machine.The strand-defined micro-orifice permits only a limited quantity of air to pass therethrough, thereby regulating pressure transfer between the bulb and the dial gauge. The Strand- Orifice Air Regulator operates passively, without springs, moving valves, or electronic components, and relies solely on geometric restriction of airflow to evaluate grip strength of individuals. Further, the same Strand- Orifice Air Regulator may be positioned at different locations within the device, including within a connector, a control valve, or an automatic deflation valve, while retaining an identical structure and mode of operation. In all configurations, the regulator improves measurement accuracy, prevents pressure surge, and enhances repeatability of grip and pinch strength evaluation.

[0046] The micro-orifice allows limited amount of air to travel from the bulb (112) to the dial gauge (104), thereby reducing errors in the measurement. The adjustment of the diameter of the orifice leads to either increased or decreased amount of air entering the dial gauge (104). This allows varied type of measurements to be indicated based on the diameter of the orifice. For example, it is well known that the pinch strength of an individual is lesser than that of the grip strength of an individual. A reduced diameter of the orifice provides resistance for air to enter into the dial gauge (104), thereby providing precise measurement of grip strength.

[0047] In accordance with the present invention, the bulb (112) is filled with fibers and it includes the stabilizer (120). The fibers provide some resistance when the bulb (112) is pressed by the user. The fibers within the bulb (112) preferably are polyester fibers. However, other embodiments of the present invention may use fibers of a different material common in the art. It is noted that the stabilizer (120)is positioned at the bottom of the bulb (112). This stabilizer (120) allows atmospheric air to be sucked into the bulb (112). This air is then forced into the dial gauge (104) when the bulb (112) is squeezed while estimating grip strength.

[0048] The stabilizer (120) is preferably made of material such as hard plastic or metal case with a rubber valve component or a hardened steel ball, however other embodiments of the present invention may use stabilizers of a different material common in the art. The stabilizer (120) includes a rubber component (332) and a valve seat (336). The rubber component (332) is positioned inside the stabilizer (120) which also includes the valve seat (336) inside the stabilizer (120) body.

[0049] In an event when the bulb is squeezed, the rubber component is pushed downwards to the valve seat, thereby preventing air leakage to the atmosphere. Further, a disc (340) is positioned above the stabilizer (120). This disc (340) restricts interference of the fibers in the bulb (112) with the rubber component (332) inside the stabilizer (120) body and the valve seat (336) of the stabilizer (120). The disc (340) is preferably made of cellulosic sponge or any other porous material in other embodiments of the present invention.

[0050] Further, the dial gauge (104) includes a metallic bellow (Not seen). The metallic bellow expands linearly after the bulb (112) is pressed and this linear movement is converted to circular motion of the pointer (113) inside the dial gauge (104), by means of a gear and pinion mechanism. The gear and pinion mechanism allows the pointer (113) in the dial gauge (104) to provide an accurate reading. When the bulb (112), is pressed, the fibers provide resistance, thereby making it slightly difficult to press the bulb (112) without any efforts. It is further noted thatthe user may utilize the device (100) to evaluate grip strength of either palm of the user.

[0051] Now referring to FIG. 3, the operation of the air flow regulator of the device (100) is described. In a first step, an event of extensive pressing of the bulb (112) leads to development of high pressure in the device (100). In a next step, air is let out from the orifice present in the wire (320) into the gauge (104). The air flow regulator prevents damage to the dial gauge (104) and reduces any error occurring in evaluation of grip strength due to presence of high pressure in the device (100).

[0052] Referring to FIG. 4 and 5, a second embodiment of the device (400) of the present invention is described. The device (400) includes a bulb (404) with a shape of a half ovoid. The bulb (404) is shaped such that one side of the bulb (404) includes a flat surface (408) and an opposite side of the bulb (404) that is curved (412). The second embodiment of the present invention measures pinch strength of the user. The user positions the pad of the thumb onto the flat surface (408) of the bulb (404) and the pad of one finger onto the curved surface (412) of the bulb (404) and presses the bulb (404) for measurement of the pinch strength of the user. The bulb (404) is replaceable in case of damage.

[0053] In accordance with the second embodiment (400), the total length of the device (400) is 144mm. Further, the length of the bulb (404) is approximately 68mm and the diameter of the bulb (404) is preferably 50mm.

[0054] Referring to FIG. 6, a third embodiment of the device (600) of the present invention is described. The device (600) includes a connecting air chamber (604) below a dial gauge (608). Further, an elongated flexible tube (612) protrudes out ofthe air chamber (604) thereby connecting the air chamber (604) to a bulb (616). Further, the third embodiment of the present invention includes a control valve (620) that pushes air out of the device (600). The control valve (620) is operable by the user to control the amount of air being released from the device (600). The control valve (620) reduces human error and makes the dial gauge (608) and the pointer within it last longer. The control valve (620) is preferably positioned precisely above the bulb (616), thereby forming a connection between the flexible tube (612) and the bulb (616). The control valve includes a knob (624) that is rotatable in a clockwise or anti-clockwise manner by the user.

[0055] In operation, the knob (624) of the valve (620) is rotated in an anti-clockwise direction to open the valve (620). The opening of the knob (624) allows the user to continuously press the bulb (616) such that air continuously exits the device (600) through the valve (620). The device of this embodiment has application as an exercise device, for repeated pressing of the bulb (616) to improve the grip strength of the user.

[0056] Referring to FIG. 6, 7 and 8, the control valve (620) of the third embodiment of the present invention is described. The control valve (620) includes two ends (704, 708) and an aperture (712) along with a packing wire (716) and a sealer (NOT SEEN). The aperture (712) is approximately centrally positioned on the cylindrical body of the control valve (620). Further, the first end (708) is a broad end, such that it is fittably positionable within the bulb (616), whereas the second end (704) is enclosed within the flexible tube (612). When the user squeezes the bulb (616), airfrom the bulb (616) is forced through the control valve (620), via the flexible tube (612) to the dial gauge (608) for measuring grip strength of the user.

[0057] The aperture (712) is packed with the packing wire (716) and cover (720). The packing wire (716) and the cover (720) form a second air flow regulator and together reduce the size of the aperture (712). The knob (624) is further positioned on the threads of the outer diameter of the aperture (712). The knob (624) is rotatable on the threads of the aperture (712). A rubber disc (721) is further positioned within the knob (624) that acts as a face valve for either opening or closing the aperture (712). Turning the knob (624) in a clockwise direction closes the aperture (712) whereas turning the knob (624) in an anti-clockwise direction opens the valve to release air.

[0058] The packing wire (716) and the cover (720) leads to a controlled flow of air out of the device (600), thereby reducing human error and prevention of damage to the dial gauge (608). It is noted that the total length of the control valve is approximately 35mm.

[0059] Another embodiment includes positioning the control valve (620) in line with a bulb in a blood pressure measurement device. The control valve (620) allows release of air from the device in a controlled manner, approximately at a rate of 3 to 4 mm of Hg per second. A person skilled in the art shall appreciate that the control valve (620) may be utilized in Mercurial, Aneroid- both Dial and Clock type, LED and LCD type of devices for blood pressure and grip strength measurement.

[0060] Another embodiment of the present invention includes an automatic deflation valve positioned vertically above the bulb (616) of the device (600). Theautomatic deflation valve (ADV) includes an air flow regulator including a wire with an orifice and a cover crimped onto it. This air flow regulator within the valve core releases air for deflation in blood pressure and grip strength measurements. The ADV ensures that the pointer on the dial gauge of the device (600) returns to the zero on the scale without error in an event of extensive squeezing of the bulb (616).

[0061] Yet another embodiment of the present invention includes a device (600) with a dial gauge (608) with a low gauge scale and a second air flow regulator positioned above the bulb (616). The low gauge scale is preferably a 300 mm of Hg scale. The combination of the low-pressure gauge scale and the second air flow regulator leads to increased resistance on pressing of the bulb (616). The increased resistance makes this embodiment to be used as a grip strengthening equipment.

[0062] Referring to FIG. 9, a fourth embodiment of the device (900) is described. The device (900) includes a pair of bulbs (904) and a flexible tube (908) including a fork including a first end (908 A) and a second end (908B). Each fork end (908 A, 908B) of the flexible tube (908) is connected to a bulb (904). Further, each bulb (904) includes an ADV (912) above it, such that the ADV (912) is positioned at the intersection of the bulb (904) and the flexible tube fork ends (908A, 908B). It is noted that the ADV (912) is nothing but the air flow regulator of the present invention positioned externally and vertically to the flexible tube (908). The fourth embodiment of the present invention allows the user to measure grip strength of both palms of the user simultaneously. Further, the fourth embodiment of thepresent invention is also utilized as a grip strengthening equipment for both palms of a user simultaneously.

[0063] In another embodiment of the present invention the bulb and the dial gauge of the device is to be placed apart, say at a distance of say 3, 4 or 5 feet apart, as required by the user. This embodiment includes a straight or coiled tube, preferably made of rubber or PVC flexible material for connecting the bulb to the dial gauge. This permits a second user to monitor the dial gauge, while positioned away from the first user.

[0064] Referring to FIG. 10, a fifth embodiment of the present invention includes a system (1000) including an integrated control unit-based grip strength evaluator device (100) configured to measure grip strength and pinch strength and to provide intelligent analysis thereof. The device (100) generates physical pressure corresponding to grip or pinch action, wherein airflow regulated by a Strand- Orifice Air Regulator (1004) produces pressure variation within the device (100).

[0065] In this embodiment, the device (100) includes one or more sensors such as displacement sensor (1008), pressure sensor (1012), tremor sensor (1016) etc. configured to detect pressure-related parameters associated with grip or pinch action. The sensors may include, without limitation, pressure sensors, displacement sensors, and position sensors configured to sense airflow pressure, bellow displacement, or pointer movement of a dial gauge associated with the device (100).

[0066] Sensor outputs are transmitted to an on-board control unit (1020) integrated within the device (100); the control unit (1020) includes a processor (1024) and associated memory (1028). Further, the control unit (1020) is configured to receivesensor signals, convert the signals into digital grip strength data, and perform computational operations including averaging, comparative analysis, and trend determination.

[0067] The control unit (1020) is operatively connected to a display interface (1032) integrated with the device (100); the display interface (1032) being configured to display instantaneous grip strength readings, pinch strength readings, averaged values, fatigue indicators, historical trends, and comparative outputs. In this embodiment the control unit (1020) is shown separately for the convenience, however, it may be integrated in the body of the device (100).

[0068] The device (100) further includes an internal data storage module (1036) configured to store grip and pinch strength data associated with individual users. A registration module (1040) stores user-specific parameters including age, gender, hand dominance, medical condition, or rehabilitation stage, which are utilized by the control unit (1020) to contextualize the measured grip strength data.

[0069] In this embodiment, the control unit (1020) is configured to perform adaptive orifice calibration, wherein the control unit (1020) analyses the magnitude and resolution of sensed pressure data and determines whether the existing Strand-Orifice Air Regulator (1004) provides an optimal measurement range. In an event where the detected grip strength falls outside a predefined resolution band, the control unit (1020) generates a calibration output indicating a requirement for a different strand-orifice configuration to enhance measurement sensitivity or dynamic range.The control unit (1020) is further configured to perform grip fatigue signature detection by analysing a temporal pressure profile generated during sustained grip or pinch actions. The control unit (1020) evaluates pressure decay, stabilization time, and force retention behaviour over a predefined time interval to identify fatigue-related characteristics indicative of muscular endurance or neuromuscular performance.

[0070] In addition, the control unit (1020) is configured to perform micro-tremor detection by analysing high-frequency pressure fluctuations detected during sustained force application. The airflow-restricted configuration provided by the Strand-Orifice Air Regulator (1020) enables detection of micro-pressure oscillations corresponding to involuntary tremors arising from neuromuscular instability or fatigue, without requiring motion-based sensors.

[0071] The control unit (1020) is further configured to provide grip-to-pinch transition intelligence, wherein the control unit automatically distinguishes between grip strength and pinch strength measurements based on sensor-derived pressure characteristics. The distinction is performed by analysing parameters including rate of pressure rise, pressure distribution pattern, peak-to-time ratio, and sustained force behaviour, thereby eliminating manual mode selection.

[0072] The device (100) further includes an integrated reminder module (1044) operatively connected to the control unit (1020), configured to generate notifications prompting periodic grip or pinch strength evaluation. An output interface (1048) including visual or audible indicators may be provided to alert theuser regarding scheduled measurements, detected fatigue patterns, or abnormal variations.

[0073] In one embodiment, the control unit (1020) further enables wired or wireless communication for transmitting grip strength data from the device (100) to an external computing device for remote monitoring or long-term assessment.

[0074] The integrated control unit-based device (100) thus provides a futuristic, intelligent grip strength evaluation device, wherein sensing, processing, display, analysis, and communication functionalities are incorporated within a single handheld device, while remaining functionally dependent on the Strand- Orifice Air Regulator (1004) for generation of primary measurement

[0075] Now referring to FIG. 1, 2 and 3, the operation of the device (100) is described. In a first step, the user covers the bulb (112) of the device (100) with his palm and presses the bulb (112) by using all his strength for a couple of seconds. In a next step, the air compresses inside the bulb (112) and is forced into the dial gauge (104). In a next step, the entry of air in the dial gauge (104) leads to movement of the pointer (113) in the dial gauge (104). It is noted that the gear mechanism inside the dial gauge (104) converts linear motion of the expanded bellow into rotary motion, thereby allowing the pointer (113) on the dial gauge (104) to rotate and point at values on the scale. The pointer (113) displays readings of the grip strength of the user instantaneously by moving along the scale (116). In a next step, three consecutive grip strength readings of each palm are noted with a rest period of at least 30 seconds in between. In a final step, the average of the three readings is recorded for future reference as required.Referring to FIG. 11, an operational cycle of the device of fifth embodiment is described. In a first step (1104) the integrated control unit-based grip strength evaluator device (100) of the system (1000) is initialized upon power-on, whereupon the on-board control unit (1020) initializes one or more sensors (1008, 1012, 1016), the display interface (1032), internal data storage (1036), and an output interface (1048), if provided. In a next step (1108), user registration or selection is then performed, wherein user-specific parameters including age, gender, hand dominance, and stored profile data are retrieved from memory or newly entered and associated with the measurement session. In a next step (1112) upon application of grip force or pinch force by a user, compression of the bulb generates pressurized air, which is regulated by the Strand-Orifice Air Regulator (1004) to produce a controlled pressure variation within the device (100).

[0076] In a next step (1116), the pressure variation and associated mechanical response are detected by one or more sensors (1008, 1012, 1016) is configured to sense air pressure, displacement, or position of a bellow, diaphragm, or pointer mechanism. Sensor outputs are acquired by the control unit (1020) and converted into digital data representing grip-related measurements sampled at predefined intervals.

[0077] In a next step (1120), based on analysis of pressure rise rate, peak-to-time ratio, pressure distribution pattern, and sustained force behaviour, the control unit (1020) automatically identifies whether the applied force corresponds to a grip strength measurement or a pinch strength measurement, thereby eliminating the need for manual mode selection.In a next step (1124), the control unit (1020) further evaluates whether the measured values fall within a predefined resolution range of the Strand-Orifice Air Regulator (1004) and, where required, generates an adaptive calibration output indicating a recommended strand-orifice configuration to enhance measurement sensitivity or dynamic range.

[0078] In a next step (1128), during sustained force application, the control unit analyses temporal pressure profiles to detect grip fatigue signatures by evaluating pressure decay, stabilization time, and force retention behaviour over a predefined interval. High-frequency pressure fluctuations are additionally analysed to detect micro-tremor patterns enabled by the airflow-restricted configuration of the Strand-Orifice Air Regulator. Processed measurement data, including identified grip or pinch mode, fatigue indicators, micro-tremor indicators, calibration outputs, and associated time and date information, are stored in internal data storage (1036) and displayed on the display interface (1032) as instantaneous readings, averaged values, historical trends, and comparative outputs. The device (100) further generates alerts or notifications via a reminder module (1044) to prompt periodic evaluation or indicate abnormal variations, and optionally transmits stored or realtime data to an external computing device through wired or wireless communication before resetting for a subsequent measurement cycle.

[0079] The device of the present invention advantageously includes a bulb with a stabilizer that allows for precise measurement of grip strength of an individual. The present invention advantageously displays instantaneous reading of the grip strength such as weak, normal, strong or very strong. The present invention furtheradvantageously includes a valve that prevents any back movement of the pointer in the opposite direction. Also, the present invention advantageously includes evaluation of precise pinch strength along with precise monitoring of grip strength by noting minute changes on the dial gauge. Any type of bulb or dial gauge may be advantageously utilized for measurement in the device of the present invention, making the device small, handy and portable. Further, this device also allows evaluation of pinch strength of each individual finger of both left hand and right hand of any person. Further, the device of the present invention is used as a grip exerciser for both hands besides being able to evaluate grip strength and pinch strength of both hands.

[0080] data.

[0081] The embodiments were chosen and described in order to best explain the principles of the present invention and its practical application, to thereby enable others, skilled in the art to best utilize the present invention and various embodiments with various modifications as are suited to the particular use contemplated.

[0082] It is understood that various omission and substitutions of equivalents are contemplated as circumstance may suggest or render expedient, but such are intended to cover the application or implementation without departing from the scope of the present invention.

Claims

CLAIMS:

1. A grip strength evaluator device (100) for evaluating grip strength of either hand of a user comprising:a dial gauge (104), a connector (108) and a bulb (112), such that the bulb being flexibly squeezable by a user for air to travel from the bulb to the dial gauge (104) through the connector (108); the connector (108) including an air flow regulator, including a wire (320) with an orifice and a cover (324) and the air flow regulator allowing controlled air flow into the dial gauge (104);the air flow regulator including removal of one or more strands from the wire (320) to form the orifice and the cover (324) being crimped onto the wire, forming a compact assembly allowing controlled flow of air from the bulb (112) to the dial gauge (104);the bulb (112) including a stabilizer (120) including a rubber component (332) and a valve seat (336) preventing a pointer (113) on a scale (116) of the dial gauge from moving in an opposite direction, away from the zero on the scale (116); and the bulb (112) enclosing a plurality of polyester fibers, rendering resistance to the bulb (112) when pressed by the user; wherein the device (100) evaluating grip strength of the user through the pointer (113) on the scale (116) and the pointer (113) rotating on an axis due to air travelling from the bulb (112) to the dial gauge (104).

2. The grip strength evaluator device (100) as claimed in claim 1, wherein the scale (116) on the dial gauge (104) being an mm of Hg scale and including a plurality of colour bands such as orange, yellow and green on readings of the grip strength of the user.

3. The grip strength evaluator device (100) as claimed in claim 1, wherein the air flow regulator being enclosed in a flexible tube (304) being positioned within the connector (108) and that connects the bulb (112) to the dial gauge (104).

4. The grip strength evaluator device (100) as claimed in claim 1, wherein the bulb (104) including a stabilizer (120) with a rubber component (332) and a valve seat (336) preventing air leakage from the bulb (112) into the atmosphere.

5. The grip strength evaluator device (100) as claimed in claim 1, wherein the bulb (112) is preferably shaped as an ovoid, allowing the user to cover the bulb (112) from all sides for optimum evaluation of grip strength.

6. The grip strength evaluator device (100) as claimed in claim 1, wherein the flexible tube (304) being preferably a silicone rubber tube that encloses the crimped wire (320) and the cover (324) within it, preventing air leakage from the device (100).

7. The grip strength evaluator device (100) as claimed in claim 1, wherein the wire (320) being a wire made of a plurality of strands being removable to form the orifice thereby allowing controlled flow of air from the bulb (112) to the dial gauge (104) and by crimping with the cover (324) defining theair flow regulator and the removal of one or more strands reducing or increasing the orifice diameter for varied applications.

8. The grip strength evaluator device (100) as claimed in claim 1, wherein the length of the device (100) is approximately in the range of 140 to 160mm, whereas the total diameter of the bulb (112) is in the range of 65 to 85mm.

9. The grip strength evaluator device (100) as claimed in claim 1, wherein the orifice being of the size of the diameter of a single or more strands being removed from the wire (320) depending on the utility of the device (100).

10. A method for evaluating grip with the device (100) comprising several steps:covering, the bulb (112) by the palm of the user and pressing the palm of the user using all his strength for a couple of seconds;compressing, the bulb (112) forcing air from the bulb (112) into the dial gauge (104) through the connector (108);movement of the pointer (113) due to entry of air into the dial gauge (104) and pointing at values on the scale (116), providing the grip strength evaluation of the user;noting, three consecutive grip strength readings of each palm of the user with a rest period of at least 30 seconds in between; and calculating the average of the three noted readings for future reference as required.

11. A grip strength evaluator device (400) including a bulb (404) preferably being a shape of a half ovoid, with a flat surface (408) and an opposite sideof the bulb (404) being curved (412) for evaluating pinch strength of the user.

12. A grip strength evaluator device (600) including a control valve (620) for pushing air out of the device (600); the control valve (620) including a knob (624) covering an opening with an air flow regulator and the knob being rotatable in a clock-wise or anti-clockwise manner controlling the amount of air being released from the device (600).

13. A grip strength evaluator device (900) including a pair of bulbs (904) and a flexible tube (908) with a fork with two ends (908A, 908B) and each fork end (908 A, 908B) being connected to a bulb (904) having an automatic deflation valve (912), enabling the user for evaluating grip strength of both palms of simultaneously.

14. A grip strength evaluator system (1000) including a strand-orifice regulator (1004), a displacement sensor (1008), a pressure sensor (1012), a tremor sensor (1016) a display interface (1032), output device (1048), a database (1036), a registration module (1040) and a reminder module (1044) such that the system (1000) being configured to collect data on grip strength from the device (100), analysing the data to provide trends on the display interface (1032) and storing the recorded data in the database (1036) for reference of the user.

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