WO1997027904A1 - Dispositif d'inversion - Google Patents

Dispositif d'inversion Download PDF

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Publication number
WO1997027904A1
WO1997027904A1 PCT/US1996/001569 US9601569W WO9727904A1 WO 1997027904 A1 WO1997027904 A1 WO 1997027904A1 US 9601569 W US9601569 W US 9601569W WO 9727904 A1 WO9727904 A1 WO 9727904A1
Authority
WO
WIPO (PCT)
Prior art keywords
chair
gravity
stand
center
axis
Prior art date
Application number
PCT/US1996/001569
Other languages
English (en)
Inventor
Roger C. Teeter
Lawrence C. Smith
Original Assignee
Inversion International Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Inversion International Limited filed Critical Inversion International Limited
Priority to AU54151/96A priority Critical patent/AU5415196A/en
Priority to PCT/US1996/001569 priority patent/WO1997027904A1/fr
Publication of WO1997027904A1 publication Critical patent/WO1997027904A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H1/00—Apparatus for passive exercising; Vibrating apparatus; Chiropractic devices, e.g. body impacting devices, external devices for briefly extending or aligning unbroken bones
    • A61H1/02—Stretching or bending or torsioning apparatus for exercising
    • A61H1/0218—Drawing-out devices
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H2203/00—Additional characteristics concerning the patient
    • A61H2203/04—Position of the patient
    • A61H2203/0481—Hanging
    • A61H2203/0493—Hanging by hanging the patient upside down or inclined downwardly

Definitions

  • the present invention relates to a chair sw ⁇ ngably supported on a stand for movement between an upright position (seat approximately horizontal and head above the legs) and an inverted position (seat approximately horizontal, but head below the legs).
  • traction is a recognized method of treating various types of back ailments.
  • traction can be "mechanical” or “natural.”
  • Mechanical traction involves the use of head (or upper torso) and leg (or lower torso) restraints secured to lines and weights to apply tension to the spine.
  • Natural traction involves hanging and using the weight of the body to provide the tensional force on the spine. Natural traction can be achieved by hanging in an upright position, but an alternative method more pertinent to the present invention is "inverted natural traction” in which the body is supported in a more or less inverted position.
  • Inverted natural traction can be achieved by use of ankle-attached "inversion boots” having hooks to fit over an elevated horizontal bar such that the body hangs vertically downward from the bar. Achieving the inverted position, and getting off the bar, is difficult for some people, only a single inverted angle is possible, and this method is not conveniently adapted for intermittent or rhythmic traction
  • Inversion tables are known in which a user is secured to a swingable table in an upright, inclined or lying position, followed by swinging the table to a more or less inverted position Inversion tables typically are more expensive than inversion boots, and take up more space.
  • Another option for inverted natural traction which is more pertinent to the present invention is an inversion chair of the type shown in Seiber U.S Patent No 4,214,790.
  • the seat and back of the chair are maintained at a fixed angle relative to each other, and the user is strapped into the chair by a lap belt
  • the chair is rotatably supported on a base.
  • a belt drive operated by a hand crank or motor can be used to rotate the chair until the user assumes a substantially inverted position.
  • the present invention provides an inversion device including a chair having a back fixed relative to a seat, and supporting structure for trunnions located above the seat and in front of the back.
  • the trunnions are journaled in a stand such that the chair is rotatable about the trunnion axis
  • a lap restraint engages the upper thighs of a user to secure the user to the seat
  • the trunnion support structure includes horizontal arms extending forward from the chair back and vertical arms extending upward from the chair seat. Such arms have adjacent ends joined to the trunnions The other ends of the arms are coupled to the back and seat in such a way as to permit adjustment of the effective lengths of the arms, which has the effect of adjusting the position of the center of gravity of the swingable unit (chair and occupant) relative to the trunnion axis Ideally, the center of gravity is positioned at approximately the same height or slightly below the trunnion axis, and slightly in front of the trunnion axis when the user first sits in the chair.
  • a stop prevents forward rotation of the chair while the lap restraint is secured Thereafter, the user can manipulate his or her body position, such as by leaning back and raising the arms, to shift the center of gravity rearward and upward, which has the effect of inverting the chair. Similarly, the user can swing back to the upright position by changing his or her body position. Handholds are provided on the stand, to be grasped if assistance is required in shifting from one position to the other.
  • power drive mechanism is provided to change the position of the chair relative to the trunnions, for adjusting the position of the center of gravity of the swingable unit relative to the axis of rotation.
  • the chair From an initial position in which the center of gravity is located slightly forward and below the axis, in which the chair is biased to a forward position against a stop, the chair is shifted rearward by the power drive mechanism. When the center of gravity passes from in front of the swinging axis to behind it, the chair swings rearward to a reclined position. The shifting of the center of gravity relative to the trunnion axis is continued until the chair has reached the desired inverted position. The chair can be returned to the upright position by reversing the shifting of the center of gravity relative to the swinging axis.
  • FIGURE 1 is a top front perspective of an inversion device in accordance with the present invention, including a swingable chair and a stand;
  • FIGURE 2 is a side elevation of the device of FIGURE 1;
  • FIGURE 3 is an enlarged, top, front perspective of interfitting components of the device of FIGURE 1, namely, a trunnion structure, with parts shown in exploded relationship;
  • FIGURE 4 is an enlarged top rear perspective of other interfitting components of the chair of FIGURE 1, namely a trunnion support arm and chair mounted bracket, with parts shown in section and parts broken away, and FIGURE 5 is a top plan of the components of FIGURE 4;
  • FIGURE 6 is a top front perspective of other interfitting components of the chair of FIGURE 1, namely, an infinitely adjustable latch for a lap restraint;
  • FIGURE 7 is a side elevation corresponding to FIGURE 2 illustrating rearward swinging of the chair
  • FIGURE 8 is a side elevation corresponding to FIGURES 2 and 7 with the chair in an inverted position.
  • FIGURE 9 is a diagrammatic side elevation of a second embodiment of an inversion device in accordance with the present invention, and FIGURES 10-12 are corresponding side elevations of the device of FIGURE 9 but with parts in different positions;
  • FIGURE 13 is a top front perspective of a third embodiment of an inversion device in accordance with the present invention,
  • FIGURE 14 is a side elevation of the device of FIGURE 13, and FIGURES 15-17 are side elevations corresponding to FIGURE 14 but with parts in different positions, illustrating inversion of the chair of such device
  • the inversion device of the present invention consists of a chair swingably mounted on a stand for rotation between a normal upright position and an inverted position
  • the chair 10 includes a seat 12 and a back 14
  • the seat and back are maintained in fixed relationship by an underlying frame 16
  • upper normally horizontal support arms 18 are coupled to the back of the frame at corresponding locations spaced above the seat
  • normally upright support arms 20 are coupled to the bottom of the frame at locations spaced forward of the back
  • the forward end portion 22 (FIGURE 1) of arm 18 is pivotally coupled to the upper end portion 24 of arm 20 by a trunnion 26, described in more detail below with reference to FIGURE 3
  • trunnions 26 are journaled in upper brackets 28 of a stand 30
  • One such bracket is provided at each side of the stand, supported spaced above a floor or other surface by front legs 32 and rear legs 34
  • Each front leg 32 has an upper end portion 36 (FIGURE 2) pivotally secured to bracket 28 and is inclined downward and forward from the pivotal connection
  • Each rear leg 34 has an upper end portion 38 rigidly secured to bracket 28 and extends downward and rearward therefrom
  • Foldable braces 40 extend between the central portions of legs 32 and 34 to limit the maximum angles of inclination
  • front legs 32 have their bottom end portions 42 connected by a crossbar 44
  • the bottom end portions 46 of the rear legs 34 are connected by a crossbar 48
  • each bracket 28 is in the form of an upright plate having an elongated upward-opening slot 50
  • the associated trunnion 26 is in the form of a generally cylindrical bushing having a circumferential groove 52 for fitting in the slot
  • the upper end 24 of support arm 20 and the forward end 22 of support arm 18 have holes 54 that fit over an inward projecting body portion 56 of the trunnion
  • Such ends of the support arms can be spaced apart by a low friction washer 58
  • a bolt 60 extends through the axial bore 62 of the trunnion bushing, and a lock nut 64 is screwed onto the inner end portion of the bolt for joining the trunnion to the support arms without clamping the joined ends of the arms together
  • the lock nut is tightened against the inner end of the trunnion body portion 56, and such body portion is of a length sufficient that the adjacent ends of the support arms can swing relative to each other without binding.
  • each of the support arms 18, 20 is coupled to the frame 16 of the chair in a manner allowing adjustment of the effective length of the arm.
  • effective length is the distance from the frame to the trunnioned end of the arm.
  • the chair frame includes peripheral structural members 68, which can be tubular and of essentially square cross section
  • a tunnel bracket 70 is rigidly affixed to the frame.
  • Such bracket has an inner upright plate 72 secured to the frame and an outer upright plate 74 spaced from the inner plate 72.
  • Plates 72 and 74 define a passage 76 through which the support arm can slide for adjustment of its effective length More specifically, the base end portion 78 of each arm (i.e., the bottom end portion for an arm 20 and the rear end portion for an arm 18) has longitudinally spaced holes 80. A retractable locking pin 82 can be fitted in a selected hole 80 to fix the effective length of the arm. Changing the effective length of the arm inherently changes its angle relative to the frame. Consequently, the passage 76 through the bracket 70 is shaped to accommodate some limited swinging motion of the arm relative to the bracket.
  • the locking mechanism includes a hollow body 84 rigidly secured to the frame 16, such as by welding.
  • Body 84 has an intemally threaded through passage for an externally threaded sleeve 86.
  • the outer end of sleeve 86 moves in an unthreaded hole 88 through the inner plate 72 of bracket 70.
  • the opposite end of sleeve 86 projects from body 84 and has an enlarged head 90 which preferably is knurled for allowing it to be turned manually.
  • Tuming head 90 in a "tightening" direction has the effect of projecting sleeve 86 outward, through the passage 88, whereas tuming head 90 in the opposite direction has the effect of retracting the sleeve.
  • Lock pin 82 extends through an axial bore of the threaded sleeve 86. One end of the pin is secured in a knob 92. Locking pin 82 is biased to the outward projected position shown in FIGURE 5 by a helical spring mounted intemally of the threaded sleeve 86, but can be retracted by pulling knob 92.
  • the knurled head 90 of the associated locking sleeve 86 is tumed in a direction to retract the sleeve 86.
  • Knob 92 is pulled inward to retract the lock pin 82 from whichever of the adjustment holes 80 it was captured in.
  • the arm then can be slid lengthwise relative to bracket 70 to a position where the desired hole 80 is approximately registered with the lock pin.
  • Knob 92 is released to project the pin through the selected hole.
  • the structure can be tightened and rigidified by turning the knurled head 90 in a direction to project the threaded sleeve outward.
  • each hole 80 has internal threads complemental to the external threads of sleeve 86 for tightening the support arm in its bracket 70.
  • the effective lengths of support arms 18 and 20 are adjustable for a particular user of the inversion device. More specifically, the support arms are preferably adjusted such that when a user occupies the chair in the upright position shown in FIGURE 2, the combined center of gravity of the chair and the user is located at approximately the same height as the trunnions and slightly forward of them. Consequently, the chair is biased to a forward swung position.
  • a stop is provided to limit forward swinging of the chair.
  • the stop is in the form of a strap 96 having one end secured to the crossbar 44 and its other end secured to the back of the chair.
  • the chair also includes a removable lap restraint 98 to rest over the upper thighs and lap area of the user and snugly hold the user on the seat 12.
  • the underside of the lap support is contoured for resting comfortably over the user and is adjustably coupled to the frame 16 of the seat.
  • the lap support can be coupled to the frame by adjustable straps similar to automotive seat belt straps.
  • the mechanism for coupling the lap support to the frame includes a rigid bar 100 having one end portion pivotally attached to the lap support and the other end portion fitted in an infinitely adjustable latch 102, shown in greatest detail in FIGURE 6.
  • the infinitely adjustable latch 102 includes a housing 104 through which the associated bar 100 slides.
  • Housing 104 is pivotally secured to the seat frame, such as by a pivot bolt.
  • the upper end of the housing has two inturned tabs 106, 108 which capture a latch plate 110.
  • Plate 110 has a central slot 112 of a size only slightly greater than the cross-sectional size of bar 100.
  • One of the tabs 106 is offset relative to the other tab 108, such that the latch plate 110 can swing between a position extending perpendicular to the length of bar 100 and a slightly oblique position.
  • a spring biases the latch plate to the oblique position. In the perpendicular position, latch plate 100 rests flush against top edges of opposite sidewalls 114 of the housing.
  • the swinging chair 10 can include a leg support 118 cantilevered downward from the seat frame 60.
  • the bottom end of the support can include horizontally spaced padded rollers 120 for engaging the user's ankles at the front and back which stably positions the legs of the user relative to the chair.
  • the upper torso of the user is not restrained relative to the back of the chair.
  • the user shown in FIGURE 2 is slouched forward slightly, in a position to assure that the center of gravity of the user and chair is positioned forward of the swinging axis (i.e., the axis of the trunnions 26).
  • the chair 10 since the position of the chair 10 relative to the swinging axis is adjustable for different users so as to locate the center of gravity in the desired position close to but slightly forward of the axis, the user can easily alter the rotated position of the chair relative to the stand by simply changing the position of his or her upper torso and/or arms. Leaning back and/or moving the arms upward and back has the effect of shifting the center of gravity of the user and chair to a position rearward of the trunnion axis. Consequently, the chair 10 begins to rotate rearward from the solid line position shown in FIGURE 7 to the broken line position. So long as the repositioned center of gravity is located to the right of the trunnion axis as viewed in FIGURE 7, the chair will continue to rotate rearward (i.e., clockwise)
  • the stand includes handholds 1 16 secured to the upper brackets 28 for grasping by the user if additional force is required to begin or continue rotation of the chair toward the upright position (the handholds are deleted from FIGURES 2, 7 and 8 to prevent obscuring the trunnion area of the chair).
  • the position of the chair be adjustable relative to the trunnions so that the inversion device is usable by people of different statures.
  • the position of the chair should be conveniently adjustable in a direction having a component parallel to the seat and a component pe ⁇ endicular to the seat. This is permitted by supporting the seat with the adjustable bars that extend, respectively, parallel and generally pe ⁇ endicular to the seat. For example, tests conducted with people of different statures have shown that for a swinging chair assembly weighing about 75 pounds, it may be necessary to shift the chair horizontally, parallel to the seat, several inches, and/or shift the chair vertically, generally pe ⁇ endicular to the seat, several inches, in order to achieve the desired balancing of the chair when it is in its upright position.
  • the chair When not in use, the chair can be easily separated from the stand for storage by simply lifting it to separate the trunnions from the mounting brackets.
  • the stand can be swung to a compact position by collapsing the side braces 40.
  • the legs 32 and 34 have telescoping upper and lower sections with adjustment mechanism allowing them to be shortened.
  • the legs can be shortened and the strap 96 adjusted such that the chair can be lowered to a normal sitting height, such that the chair can be used for normal, stable upright support of a user, like any other chair.
  • the strap (or other suitable stop mechanism) can be adjusted to permit limited rotation of the chair, such as through an angle of approximately 135°. Elevation of the chair by extending the legs is required to provide room for complete inversion.
  • FIGURES 9-12 illustrate diagrammatically a power-driven embodiment in which the adjustments can be made after the user sits in the chair.
  • the power-driven apparatus can be used to effect rotation of the chair between upright and inverted positions without the user changing his or her body position.
  • the embodiment of FIGURES 9-12 uses a chair 10' including a seat 12' fixed relative to a back 14'.
  • a normally horizontal support arm 18' and a normally upright support arm 20' are coupled to the chair and extend, respectively, forward and upward to a trunnion 26' of the same general type as trunnion 26 previously described.
  • trunnions 26' are journaled in brackets of a stand identical to the stand 30 described with reference to FIGURES 1-8.
  • the user is secured in the chair by a lap support of the type previously described.
  • the horizontal support arms 18' are coupled to the chair by power drive mechanism 130
  • vertical support arms 20' are coupled to the chair by power drive mechanism 132.
  • the power drive mechanisms 130 and 132 include actuators that cooperate with the support arms for adjusting the effective lengths of the arms.
  • Any suitable power drive mechanism can be used including, for example, rack and pinions, screw drives, worm drives, hydraulic or pneumatic cylinders, gear drives, etc., which can be operated to shift the support arms relative to the chair. Shifting the support arms results in shifting the chair relative to the trunnions. By manipulating the center of gravity of the user and chair relative to the trunnion axis, the chair can be made to rotate as desired.
  • arms 18' and 20' are adjusted such that the center of gravity of the swingable unit (chair and occupant) is located slightly forward and below the trunnion axis for users of different statures, i.e., at approximately position 134 shown in FIGURE 9. In this position, the chair is biased to a forward swung position against a stop 136.
  • stop 136 is shown diagrammatically and can consist of any suitable structure preventing forward tilting of the chair from the solid line position shown in FIGURE 9.
  • a strap connected between the stand and the chair can be used, similar to strap 96 described with reference to the embodiment of FIGURES 1-8. O 97/27904 PC17US96/01569
  • the effective length of the horizontal arm 18* is increased by use of the power drive mechanism 130. As represented in broken lines in FIGURE 9, this results in shifting the chair rearward, to the right as viewed in FIGURE 9.
  • the center of gravity 134 shifts rearward, i.e., toward the position indicated at 138.
  • the chair does not actually reach the broken line position shown in FIGURE 9, because once the center of gravity has shifted to a position rearward (to the right) of the trunnion axis, the chair swings in pendulum fashion because the equilibrium position is always with the center of gravity located vertically below the trunnion axis.
  • the chair begins a rearward (clockwise) rotation.
  • the chair continues to rotate rearward (clockwise) so long as the center of gravity continues to be shifted in the same lateral direction relative to the trunnion axis.
  • the chair can be made to rotate at least about 45 degrees to the position shown in solid lines in FIGURE 10. In such position, both support arms 18' and 20' are inclined upward and inward to the axis of trunnions 26'.
  • additional rearward (clockwise) rotation of the chair can be induced by continuing to shift the center of gravity of the swinging unit to the right, which can be achieved by continuing to increase the effective length of the back-coupled arm 18', or by decreasing the effective length of the seat-coupled arm 20', or a combination of such actions.
  • Increasing the effective length of arm 18' drives the seat back down and to the right, whereas decreasing the effective length of arm 20' lifts the chair seat up and to the right. In either case the chair must swing clockwise toward the equilibrium position in which the center of gravity is located vertically below the trunnion axis.
  • rotation of the chair from the solid line position shown in FIGURE 9 to the solid line position shown in FIGURE 10 can be induced solely by increasing the effective length of arm 18*.
  • the center of gravity will be vertically below the axis of trunnions 26', at approximately position 140.
  • Continued lengthening of support arm 18' tends to translate the center of gravity toward position 142 which causes the chair to continue the rearward (clockwise) rotation.
  • Shortening support arm 20' tends to translate the center of gravity toward position 144 which also has the tendency of inducing the chair to continue the rearward (clockwise) rotation.
  • arm 18' will be at its maximum effective length, and continued rotation of the chair can be induced solely by decreasing the effective length of arm 20'. Also, depending upon the geometry, a position can be reached at which arm 18' is at its maximum effective length, and arm 20' is at its minimum effective length, represented in solid lines in FIGURE 11.
  • the chair is nearly inverted, and the center of gravity at position 146 is vertically below the axis of trunnions 26'. The chair has been rotated through a sufficient angle that arm 18' has swung past a vertical position.
  • a stop 149 be provided to limit the rearward rotation of the chair and establish a stable inverted position, such as when the body of the user hangs in approximately the position shown in FIGURE 8 with his or her back spaced from the back of the chair. Stop 150 is shown only diagrammatically and any suitable stop mechanism can be used, including a strap similar to strap 96 described with reference to the embodiment of FIGURES 1-8.
  • the power drive mechanism or actuators 130 and 132 can be controlled separately.
  • An alternative is to provide a control system 151 (shown diagrammatically) using limit switches or other position sensors.
  • FIGURES 13-17 The principles of operation of the power-driven embodiment of the present invention were confirmed by construction and operation of a prototype shown in FIGURES 13-17.
  • the prototype uses a stand 30' (deleted in FIGURES 14-17) of the general type previously described, including front legs 32 inclined downward and forward from upper brackets 28 and rear legs 34 inclined downward and rearward from the brackets. Trunnions 26" are journaled in the brackets, and pivotally connect the front ends of support arms 18" to the upper ends of vertical support arms 20". Such support arms were coupled to the frame by a power-driven mechanical crank and linkage assembly to allow adjustment of the effective lengths of the arms.
  • Such rigidly connected components include a diagonal bar 150 at each side of the chair.
  • Each bar 150 is inclined from a lower front end 152 to an upper rear end 154.
  • the lower front end portions of the diagonal bars 150 are connected by a cross bar 156 that extends below the chair seat.
  • Another stationary cross bar 158 extends below the chair at approximately the junction of the seat and back, and has its opposite ends rigidly connected to the diagonal bars 150 by angle plates 160.
  • the other components of the mechanical crank and linkage assembly are movable relative to the diagonal bars 150 and their cross bars 156 and 158.
  • corresponding bell cranks 162 have their central portions 164 pivoted to the rear upper ends 154 of diagonal bars 150.
  • Each bell crank includes a top leg 166 inclined upward and rearward to its point of pivotal connection to the rear end of the corresponding support arm 18", and a lower leg 168 inclined downward and rearward to a cross bar 170 that connects the bottom end portions of the lower legs 168.
  • Mechanism was provided for adjusting the distance between cross bar 158 which is stationary relative to the chair and cross bar 170 which adjusts the positions of the belt cranks 162 and, consequently, the effective lengths of support arms 18".
  • the bottom ends of such arms are pivotally joined to horizontal links 180 having leading end portions connected by a cross bar 182 extending beneath the chair.
  • the trailing ends of links 180 are pivotally connected to the angle plates 160.
  • a jackscrew and nut drive 184 salvaged from an automobile power seat, is effective to adjust the distance between the stationary cross bar 156 and the adjacent cross bar 182. Because of the geometry, increasing the distance between cross bars 156 and 182 has the effect of decreasing the effective lengths of the vertical support arms 20".
  • FIGURES 14-17 illustrate sequential stages in inversion of the chair 10".
  • both jackscrew drives are fully “retracted” such that cross bars 158 and 170 are close together and cross bars 156 and 182 are close together.
  • first jackscrew 172 is driven which moves cross bars 158 and 170 apart, and increases the effective length of the upper support arm 18". Since the trunnions 26" are necessarily at a fixed location by virtue of their connection to the stand, the chair 10" is shifted rearward which shifts the center of gravity to a position behind the pinion axis, and the chair rotates rearward (clockwise).
  • FIGURE 15 shows the equilibrium position of the chair as the maximum effective length of the upper support arm 18" is approached.
  • FIGURE 16 shows the attitude of the chair as maximum extension of jackscrew 184 is reached.
  • FIGURE 17 illustrates the resultant fully inverted position.

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  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Pain & Pain Management (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Rehabilitation Therapy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)

Abstract

Des bras de support (18, 20; 18', 20'; 18', 20') sont couplés entre un dossier (14, 14') de fauteuil, un siège (12, 12') et des pivots (26, 26', 26') disposés aux côtés opposés du fauteuil (10, 10', 10'). Les pivots (26, 26', 26') sont montés rotatifs dans un pied (30, 30') de façon que le fauteuil (10, 10', 10') puisse tourner autour de leur axe. Un dispositif de retenue ventral (98) bloque la partie supérieure des cuisses de l'utilisateur, de façon à le maintenir fermement sur le siège (12, 12'). Les longueurs efficaces des bras de support (18, 20; 18', 20'; 18', 20') (c'est-à-dire la distance entre le dossier (14, 14'), le siège (12, 12') et les pivots (26, 26', 26')) sont réglables, ce qui permet de régler le centre de gravité du fauteuil (10, 10', 10') et de l'occupant par rapport à l'axe des pivots.
PCT/US1996/001569 1996-01-31 1996-01-31 Dispositif d'inversion WO1997027904A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU54151/96A AU5415196A (en) 1996-01-31 1996-01-31 Inversion device
PCT/US1996/001569 WO1997027904A1 (fr) 1996-01-31 1996-01-31 Dispositif d'inversion

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Application Number Priority Date Filing Date Title
PCT/US1996/001569 WO1997027904A1 (fr) 1996-01-31 1996-01-31 Dispositif d'inversion

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1219277A1 (fr) * 2001-01-02 2002-07-03 Johan Dossche Chaise orthopédique
US7160233B2 (en) * 2002-09-26 2007-01-09 Concepts To Retail, Llc Abdominal exercise device
US8016731B2 (en) 2009-01-06 2011-09-13 Rael Vanterpool Abdominal exercise machine
CN105582656A (zh) * 2014-11-15 2016-05-18 青岛瑞箭机电工程技术有限公司 倒立练习架
US9827503B2 (en) 2015-04-17 2017-11-28 Lagoon Corporation, Inc. Restraint system for amusement ride
US9950647B2 (en) 2015-04-17 2018-04-24 Lagoon Corporation, Inc. Seat form for amusement rides

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4214790A (en) * 1979-01-25 1980-07-29 Sieber Walter P Orthopedic reclining chair
US4546972A (en) * 1984-01-11 1985-10-15 Leslie Kovats Two-position pivot support structure for a tiltable body exerciser
US5031905A (en) * 1990-06-21 1991-07-16 Walsh Russell B Exercising device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4214790A (en) * 1979-01-25 1980-07-29 Sieber Walter P Orthopedic reclining chair
US4546972A (en) * 1984-01-11 1985-10-15 Leslie Kovats Two-position pivot support structure for a tiltable body exerciser
US5031905A (en) * 1990-06-21 1991-07-16 Walsh Russell B Exercising device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1219277A1 (fr) * 2001-01-02 2002-07-03 Johan Dossche Chaise orthopédique
US7160233B2 (en) * 2002-09-26 2007-01-09 Concepts To Retail, Llc Abdominal exercise device
US8016731B2 (en) 2009-01-06 2011-09-13 Rael Vanterpool Abdominal exercise machine
CN105582656A (zh) * 2014-11-15 2016-05-18 青岛瑞箭机电工程技术有限公司 倒立练习架
US9827503B2 (en) 2015-04-17 2017-11-28 Lagoon Corporation, Inc. Restraint system for amusement ride
US9950647B2 (en) 2015-04-17 2018-04-24 Lagoon Corporation, Inc. Seat form for amusement rides

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