US1737505A - Dental chair - Google Patents

Dental chair Download PDF

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Publication number
US1737505A
US1737505A US184239A US18423927A US1737505A US 1737505 A US1737505 A US 1737505A US 184239 A US184239 A US 184239A US 18423927 A US18423927 A US 18423927A US 1737505 A US1737505 A US 1737505A
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United States
Prior art keywords
carriage
foot
rest
frame
section
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Expired - Lifetime
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US184239A
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English (en)
Inventor
May Adam Joseph
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RITTER DENTAL Manufacturing Co Inc
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RITTER DENTAL Manufacturing CO Inc
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Application filed by RITTER DENTAL Manufacturing CO Inc filed Critical RITTER DENTAL Manufacturing CO Inc
Priority to US184239A priority Critical patent/US1737505A/en
Priority to GB16528/27A priority patent/GB288958A/en
Priority to DER71596D priority patent/DE518960C/de
Priority to FR639354D priority patent/FR639354A/fr
Application granted granted Critical
Publication of US1737505A publication Critical patent/US1737505A/en
Anticipated expiration legal-status Critical
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G15/00—Operating chairs; Dental chairs; Accessories specially adapted therefor, e.g. work stands
    • A61G15/10—Parts, details or accessories

Definitions

  • the present invention relates to chairs and more particularly to foot rests therefor of the adjustable variety which may be used with dental, barbers and other types of chairs7 one object being to provide an improved foot rest of this class embodying relatively adjustable parts or sections with means by which the occupant of the chair yor an attendant can quickly and conveniently eect the Adesired adjustments.
  • a further object of the invention is to provide an improved foot Irest for chairs embodying a frame or footsboard section and a toe-board section or rest adjustable to different angular positions upon the frame and inwardly and outwardly with respect to the chair base whereby to accommodate persons who may occupy the chair from time to time.
  • a further object of the invention is to provide a foot rest including relatively adjustable parts or sections of simple construction which can be manufactured at a comparatively low cost and which include a single control member by which the occupant of the chair or an attendant can operate 0r control the same to both effect inward and outward movement of the adjustable part and to raise or lower it or vary its inclination with respect to the horizontal.
  • a further object of the invention is to provide in combination with a dental or other type of chair, a frame or foot-board having a -foot rest normally inclined with respect to the same and adjustable longitudinally thereon and also to and from substantial alignment therewith and having means for moving it to its dierent positions of adjustment and also means for automaticallyr locking it in said positions.
  • Figure l is a side elevation of a chair embodying one form of the invention.
  • Figure 2 is'a bottom plan of the foot rest 1927. Serial No. 184,239.
  • Figure 3 is a bottom plan view of a ⁇ portion .of the foot rest, .partially in section and showlng' the operating means for the Carriage which supports the toe-board, .the operating means being in .position to elfect release Sof the ⁇ .brake or carriage locking means;
  • Figure 4 is a side elevation 'of the foot .rest with the toe-board shown inione of its nor- Inally inclined positions;
  • Figure 5 is a fragmentary ⁇ sectional elevation drawn to an enlarged scale and ytaken on line a-a 'of Figure 2;
  • Figure 6 is a transverse section taken yon line 6& 61 of Figure 12;
  • Figure 7 is la transverse section taken on line Ta-7 of Figure 2;
  • Figure S isa :longitudinal section takenon b oard latclaing means shown in release position;
  • Figure -9 is :a fside elevationnffthe foot rest showing the toe-board adjusted 4into alignment with the foot-board;
  • Figure '10 is a side elevation lpartly in section showing the toe-board in its outermost angular position on the foot-board;
  • Figure 11 is a fragmentary sectional elevation taken on line 11n- 11a Aof Figure 3 showing the locking :bolt for holding the .toeboard and carriage against longitudinal movement when the parts are adjusted to the position shown in Figure-9 l
  • Figure 12 is a perspective view of a pivotal support for the operating lever .shown in plan in Figures 2 and 8,;
  • Figure 13 is an enlarged detailed section taken on line 13a-,13a of Figure -3 showing-the carriage lockingk means in service position;
  • Figure 14 is a similar viewwith'the locking means shown in release position.
  • Figure l5 is a detailed vperspective view showing one end of the lock release bar, the application Aof which is besty shownin Alzligures 3 and 6.
  • the present invention embodies, generally7 a chair 'ha-vinga foo-t restcomprising a main frame portion or section in the form of a foot-board carried by the chair and an adjustable section thereon in the form of a foot rest or toe-board with means by which either the person occupying the chair or the dentist or other attendant may conveniently adjust the toe-board inwardly or outwardly to a position which will best suit or accommodate ⁇ the patient or occupant of the chair.
  • the invention further contemplates adjustment of the toe-board into and out of substantial alignment or parallel relation with the foot-board either by the patient or the attendant and throughthe use of the same operating or control means employed for reciprocating it upon the frame or foot-board.
  • the toe-board may be adjusted into alignment with the foot-board at any time desired, but particularly at such times as it becomes necessary to have ⁇ the pat-ent occupy a reclining position as when administering an anzesthetic, during which time complete relaxation on the part of the patient is desirable.
  • 10 represents a chair frame or base having a seat base or frame 11 thereon carrying a seat or cushion 12 and certain other parts including the side arms 13 and the adjustable back support 14, which may be of any preferred construction.
  • T he chair is preferably of the extensible type and may be raised and lowered by any suitable means, such as an electric motor, not shown, but adapted to be controlled by the switch pedals 15 shown in Figure 1.
  • the scat frame or base 11 carries a downwardly and :forwardly extending frame or bracket 16 having extended side or arm portions 17 upon which is superimposed the foot rest including the foot-board or frame 18 and the toe-board 19.
  • the foot-board is preferably in the form of a cast plate 21 and carries a suitable cover 21a, preferably comprising a rubber mat secured by angle plates 22 as shown in Figures 6 and 7.
  • the foot-board is detachably secured to the arm portions 17 by screws 23 as indicated in Figure 6.
  • the toe-board is preferably in the form of a casting 24 and carries a cover 24a of rubber'or other suitable material secured by angle plates 25.
  • the angle plates 22 and 25 are preferably secured to the foot and toe-boards by screws as shown in Figure 1.
  • the toe-board is mounted upon the frame or foot-board through the medium of an adjustable carriage 26 and a U-shap'ed support or bracket 27 including a transverse portion 28 and inwardly projecting plate portions 28L extending beneath the toe-board and suitably connected therewith as by means of the screws 29, Figure 2.
  • the carriage 26 is reciprocally mounted upon guides 30, preferably in the form of rods having their opposite ends supported by front and rear lugs 31 and 32 on the bottom of the footboard frame, connected respectively by ribs 33 and 34.
  • the carriage 26 is provided with front and rear bearings 35 and 36, respectively, through which the rods extend.
  • Cushioning members 37 are provided for the carriage, the same being mounted on the rods 30 against the lugs 32, Figure 3, which are preferably integral with the foot-board casting 18.
  • Screws 38 extend into ⁇ the lugs 32 and engage and hold the rods against displacement.
  • the transverse portion 28 of the U-shaped bracket 27 is provided with upwardly extending arms 39 pivoted on a transversely extending shaft or support 40 extending through lugs 36 and 36b projecting downwardly from the bearing lugs 36 of the carriage 26, Figure 3.
  • a sleeve 41 is fitted in the lug 36a to form an elongated bearing for the shaft at one side of the carriage.
  • the transverse portion 28 of the bracket 27 is provided with a pair of spaced lugs 42 and 43 carrying a pin 44 on which is pivotally mounted a locking or holding element 45, preferably in the form of a detent, notched at its rear or free end to receive a keeper preferably comprising a sleeve 46 extending transversely of the detent and supported by a plurality of lugs 47, 48 and 49, projecting downwardly from the carriage 26, Figure 6.
  • the detent is normally held in engagement with the keeper 46 by a spring 50 coiled about the pivot pin 44 of the detent and having one end held by the lug 43 and the other extending under the detent to constantly exert an upward pressure thereon.
  • the detent therefore serves as a holding means for the toe-board to maintain it in its different angular positions upon the carriage and with respect to the foot-board as hereinafter described.
  • the means for effecting release of the detent or holding means and for moving the carriage upon its guides longitudinally of the foot-board comprises a pedal or foot lever 51 which projects slightly to one side of the foot-board frame as shown in Figures 2 and 6 and which is pivoted at its inner end at 51a to an arm or lever 52.
  • the arm 52 is provided with a hub or bearing 52a pivoted upon a bolt 53, Figure 5, having spaced portions 54 intermediate its ends, on ther lower of which the outer end of the lever arm 52 is seated.
  • the upper end of the bolt projects into a lug 55 on the carriage 26 and is held by the head of a screw 56 threaded into the bolt.
  • the lever arm 52 is held upon the bolt by the head of a screw 57 threaded therein.
  • the lever 51 is therefore pivoted to swing upon the arm about a horizontal axis at right angles to the axis of the bolt 53 on which said arm is adapted to swing.
  • the lever 51 is providedintermediate its ends with an opening 58, Figure 5, in the bottom of which is iitted a socket member 59 having a recess 'adapted to receive a head 6() of a link 61 extending upwardly through said opening.
  • the upper end of the link is provided with a head 62 lit-ting in a recess of an arm 63 held rigid on the shaft by a key 64.
  • the link heads GO and 62 and the recesses in which they operate are, preferably, of the ball and socket type whereby universal movement of the vlever 51 is permitted so that it can be moved either in a horizontal plane through the pivotal movement of the arm 52 or downk wardly as indicated by the dotted line position shown in Figure 6 to rock the. shaft i0 in its bearings for a purpose hereinafter described.
  • the lever 51 is limited in its upward moven'i'ent through engagement of a laterally extending portion 65 thereof with the underside of one of the ears or lugs 66 projecting 'from the hub *52L on the outer end of the arm 52, Figures 5 and 12.
  • the lever is normally held in the horizontal position shown in Figures 5 and v6 by a torsion spring1 '67 coiled about the shaft Ll0, Figures 3 and 8, one end of the spr-ing bearing against the carriage 26 and the otherbeing anchored upon a set screw 68 threaded into a boss 69 on a pawl or finger 70.
  • the set screw serves to .hold the Ilinger in proper position on the shaft.
  • the inner end of the arm 52 is adapted to ride upon the lower end of the lug 49 projecting downwardly from the carriage, whereby to avoid undue strain on the pivot bolt during depression of the outer end of the operating lever 51, it being understood that downward movement of the lever tends to thrust the inner end of the arm 52 upwardly.
  • the pawl 70 is provided for depressing and releasing the detent or holder l5 when it is desired to adjust the toc-board into alignmentwith the foot-board as indicated in Figure 9.
  • thexdetent carries an actuatorl 71 on a pin 72 projecting from the detent.
  • a torsion spring 73 is coiled about the pivot pin and has one end extended beneath an abutment 74; on the detent and the other over a projection 75 on the ⁇ actuator whereby the latter is normally held in the position shown in Figure 5.
  • rPhe actuator is Aprovided with a bifurcated or recessed portion 76 adapted to receive the rounded end 77 of the pawl 70 upon full depression of the pedal or lever 51 which can only be effected when the toe-board is moved outwardly to the position shown in Figures 5 and 10.
  • toe-board becomes aligned with the footboard, the detent moving into the position shown in ' Figure 9, while the toe-board is dropping, during which time the pawl will move out of the vnotch or recess of .the actuator and the latter will be returned to the normal position shown in Figure 5 by the spring 78.
  • Raising the toe-board is effected by depressing the pedal lever to rock the arm 63 which carries a shoulder or lug 88 adapted to cooperate with a cushioning member 84 on a lug 85 of the transverse portion of the .toeboard bracket to swing the toe-board from the position shown in Figure 9 to that shown in Figure 10,
  • Vthe pivoted end of the detent 45 is swung downwardly and forwardly, until the notch in its rear end is opposite the holding part 46, at which time spring 50 will automatically lift the free end of the detent to the position shown in Figure 10.
  • Means is provided for automatically locking the carriage and the toe-board thereon in its outermost horizontal position as shown in Figure 9 so that the toe-board cannot be moved longitudinally of the frame or footi board until it has been raised from lowered position.
  • This means is shown in Figure 11 and comprises, preferably, a locking bolt 86 adapted to take into a recess 87 of the footboard easting, the bolt being guided in a portion 88 of the carriage bed, Figure 7.
  • the bolt is provided at its lower end with a later ally projecting pin 89 extending into the notched end of an operating member comprising a plate like arm 90 on the shaft 40,
  • Means for holding the carriage in any position of adjustment of the toe-board is provided in the form of an automatically operated brake or locking device normally occupying a locking position and adapted to be released when the pedal or operating lever is actuated to advance or retract the carriage.
  • the brake proper is preferably in the form of a U-shaped clamping element 92 surrounding one of the rods 30 by which the carriage is Ysupported and guided. This element is mounted between the lug 36" of the carriage and another lug 93 thereon as shown in Figure 8.
  • a plate 94 connects said lugs and forms a support for an adjusting screw 95 for varying the distance between the split ends of the clamping element 92 to take up for wear and to afford the desired pressure for holding the carriage in adjusted position.
  • the inner portion of the clamping ⁇ element is preferably provided with a hardened pin or insert 96 upon which rests the eccentric or cam portion 97 of a lever 98 carried by a pivot pin 99 threaded into the bottom of the carriage base 2G.
  • the lever 98 is arranged to be moved to release position simultaneously with the movement of the pedal lever when the latter is swung in either direction upon its pivot 53 to advance or retract the carriage. This is done through the medium of a rod 100 slidable in the detent holding sleeve 4G carried by the lugs 47 48 and 49, Figure 3.
  • the rod has an enlarged head or shoulder 101 which is slotted to receive a forked shaped element 102 suitably secured to the rod as by means of screws or pins 103 extending through holes 104 in said element.
  • the fork 102 is adapted to overlie the pedal arm 52 and to straddle the pivot bolt 53 between the upper and lower collar portions 54 and 54a thereon as indicated in Figure 5.
  • the fork is provided with shoulders or abutments 105 in engagement with a pair of upwardly eX- tending studs or pins 106 carried by the hub portion 52a of the pedal arm 52.
  • a spring 107 on the rod is interposed between the shoulder 101 thereof and the lug 49 on the carriage and serves to return the fork 102 and through it, the pedal lever to normal position when the latter is released.
  • a second spring 108 guided by the reduced end 109 of an adjusting screw 110 serves to return the lever 98 to clamping or locking position when the pedal is returned to normal position by the spring 107.
  • the adjusting screw is threaded in a lug 111 projecting downwardly from the carriage base 26 adjacent one of the bearings 35 and is preferably recessed to receive the outer end of spring 108 as shown in Y Figure 3.
  • a locking nut 112 holds the screw 110 in adjusted position, the latter serving to regulate the movement of the lever 98 and also forming a stop for limiting the swinging movement of the pedal lever elements 51 and 52.
  • the carriage and the foot rest section 19 thereon may then be retracted to any desired position upon the footboard section where the carriage will become automaticallylocked upon release of the pedal as explained above. It will be understood that in advancing the carriage, the operator will preferably use the ball of the foot to press outwardly upon the pedal and that in retracting the carriage the toe of the shoe may be used to exert a pull on the pedal.
  • 'l trame adapted for attachment to a chair base, a carriage reciprocably mounted uponV the frame, a foot rest mounted to swing upon the carriage to different positions of adjustment, holding means for retaining the 'foot rest in adjusted. position and operating means tor reciprocating the carriage movable to effect release of the holding means, when the toot-rest is moved to a predetermined position, said holding means being arranged to automatically return to holding ⁇ position when the foot-rest is swung to one of said posit-ions.
  • a trame adapted for attachment to a chair base, a carriage reciprocably mounted longitudinally upon the frame, a foot rest mounted to swing uponl the carriage to different positions of adjustment, holding means for retaining the foot rest in adjusted position, operating means for reciprocating the carriage movable to effectrelease ot the holding means and means arranged to automatically lock the carriage when in 'one position of adjustment.
  • a frame adapted for attachment to a chair base, a carriage reciprocably mounted upon the frame,a toot rest pivotally connected with the carriage :tor a raising and lowering movement thereon, releasable holding means for supporting the :toot rest in raised position, operating means for reciprocating the carriage upon the frame and actuating means arranged to be moved by the operating means to release the holding means when the carriage is in one position upon the Yframe to permit lowering of the foot rest, said operating means being ⁇ also adapted for raising the toot rest from said lowered position.
  • a frame adapted for attachment to a chair base, a carriage reciprocably mounted upon the frame, a support pivoted upon the carriage, a foot rest mounted to swing upon the support to dierent positions' with respect to the trame, releasable holding means interposed between the' carriage and the toot rest arranged to hold the latter in said diiterent positions, operating means for reciprocating the carriage upon the trame, means interposed between the operating means and the pivoted support movable to actuate the latter when the carriage is in a predetermined position and means arranged to be actuated by the support when the carriage is in said position to eitect release of the holding means.
  • a frame adapted for attachment to a chair base, a carriage reciprocably mounted upon the frame, a support pivoted upon the carriage, a toot rest section mounted to swing upon the support t0 different positions with respect to the frame, a detent interposed between the carriage and the foot rest section for holding the latter' in one position, a pivoted actuator on the detent, a pawl on the support arranged to cooperate with the actuator to effect release of the detent in one position of the carriage, operating means for reciprocating the carriage on the frame to and from said position with the detent in holding position and means interposed between the operating means and said pivoted support arranged when the carriage is in said position to actuate the support to effect movement of the pawl and operation oi the actuator to release the detent.
  • a dental chair the combination with a seat supporting base and a frame connected therewith, of a foot rest section reciprocablyv mounted tor longitudinal movement upon said frame and also mounted to swing to different positions thereon, operating means including a control member movable in different directions for reciprocating and swinging the section to its different positions, and means cooperating with the operating, ⁇ means and associated with the frame to limit movement of the control member in one plane while moving to effect reciprocation of the foot rest section to and from a predetermined position.
  • a dental chair the combination with a seat supporting baseA and a frame connected therewith, of a foot rest section movable bodily and longitudinally upon the frame and arranged to be swung into and out of substantial alignment therewith when moved to a predetermined position and operating means for moving the section bodily to said position and for controlling its swinging movements7 said operating means being limited in its movement in one plane by the trame when the foot rest section is moving to and from said position.
  • a dental chair the combination with a seat supporting base and a frame connected therewith, of a carriage reciprocably mounted upon the frame, a foot rest section pivotally mounted on the carriage to swing relative to the frame, releasable holding means for connecting the carriage and toot rest sec tion to support the latter in a predetermined position with respect to the frame and operating means including a control member movable in diterent planes to reciprocate the carriage and to release the holding means.
  • a dental chair the combination with ak seat supporting base and a frame connected therewith, of a carriage adjustable upon the frame, a foot rest section overlying the frame and arranged to be swung upon the carriageinto substantial alignment with the frame when the carriage is adjusted to al predetermined position thereon and means for adjusting the carriage to and from said position, said means being adapted to swing the foot rest section into and out of substantial alignment with the frame.
  • a dental chair the combination with a seat supporting base and a frame connected therewith, of a carriage reciprocably mounted beneath the frame, a foot rest sec-V tion on the carriage arranged to extend in upright position above the frame and having supporting arms projecting from its sides, the arms being pivoted to swing upon the carriage to adjust the section into substantial alignment with the trame whenthe carriage is adjusted to a predetermined position, releasable holding means for maintaining the section in said upright position and means for adjusting the carriage to said predetermined position, said means being adapted to effect release or" the holding means to permit the foot rest section to swing into substantial alignment with the frame.
  • a dental chair the combination with a seat supporting base and a 'foot-board sec tion connected therewith, of a carriage re ciprocably mounted upon the foot-board section, a foot rest section pivoted upon the carriage to swing relative to the foot-board section when the carriage is in a predetermined position, holding means for the :toot-rest section releasably engaging the carriage, locking means for the carriage, a member having a limited swinging movement upon the carriage in opposite directions Jfrom a normal inoperative position, means actuated by said member when the latter is swung in either direction adapted to effect release ot said locking means, an operating element for reciprocating the carriage adapted to move said member to either of its lock releasing positions an d means adapted to be actuated by the operating element when the carriage is in said predetermined position to eifect release of said holding means in order to permit the Jroot rest section to swing upon the carriage.
  • a dental chair the combination with a seat supporting base and a foot-board section connected therewith, of a carriage reciprocably mounted on the foot-board section, a foot rest section pivoted on the carriage to swing relative to the toot-board section when the carriage is in a predetermined. position, releasable holding means interposed between the carriage and the foot rest section adapted to normally hold the latter inclined with respect to the foot-board section, locking means for the carriage and operating means comprising relatively movable members one of which is adapted to swing upon the other,
  • a dental chair the combination with a seat supporting ⁇ base and a toot-board section thereon, a carriage reciprocably mounted upon theV toot-board section, a rock shaft pivoted upon the carriage, a toe-board section n'iounted toswing upon the rock shaft when the carriage is in a predetermined position, locking ⁇ means for'the carriage, holding means interposed between the carriage and the toe-board section adapted to normally hold the lattei ⁇ inclined, with respect to the toot-board section, means on the rech shaft adapted to move the holding means to release position, an arm on the rock shaft, a pivotedy member arranged to swing on the carriage and adapted to etlect release ot the locking means, a control member arranged to swing on the pivoted member and adapted to cooperate with the latter to etiect reciprocation of the carriage and a connection between said control. member and said arm by which the latter is actuated to rock said shaft when the carriage is in said predetermined position whereby to
  • a frame adapted for attachment to a chair base andphaving guide portions thereon, a carriage mounted upon l@guide portions for moven'ient longitudinally thereof, a foot-rest movable bodily with the carriage and arranged to swing ⁇ thereon to dilerent positions and operatingr means for both shitting the carriage and swingingv the toot-rest thereon comprising ⁇ relatively movable parts one of which is operable to reciprocate the carriage and to actuate another of said parts to effect ay swinging ⁇ movement of the toot-rest upon the carriage.
  • a frame adapted for attachment to a chair base and having a portion forming a foot-board, a carriage reciprocally mounted below said foot-board for movement longitudinally thereof, a foot-rest section ⁇ movable bodily with the carriage and arranged to swing thereon to different positions, releasable means for holding the foot-rest section in one of said positions, and relatively movable cooperating parts for shifting the carriage and for swinging the toot-rest section thereon.
  • a frame having one end adapted for attachment to a chair base, a foot-board on the frame, a slide below the foot-board arranged for movement toward and from said frame end, a foot-rest section mounted upon the slide for movement bodily therewith and arranged to swing upon the slide from a position substantially in alinement with the foot-board to a predetermined angular position with respect thereto, and operating means comprising relatively movable parts for shifting the slide and for swinging the foot-rest section thereon.
  • a trame having one end arranged for attachment to a chair base, a foot-board on said trame, a toot-rest mounted for a reciprocating movement longitudinally upon said frame toward and from said vtrame end and Jfor a swinging movement between a lowered position substantially in alinement with said tootboard and an angular position relative thereto, operating means for reciprocating said toot-rest mounted to travel therewith, means arranged for movement by said operating means to swing the toot-rest from said lowered to said angular position and locking means for holding the foot-rest in said angular position.
  • a frame adapted for attachment to a chair base including spaced guide portions, a carriage mounted Jfor reciprocatioii longitudinally upon said guide portions, a toot-rest section movable bodily with the carriage andarranged to swing thereon to different positions and operating means interposed between the carriage and section for both sliding the carriage and swinging the section thereon, said operating means comprising a plurality of relatively movable parts one of which is mounted for movement upon the carriage and arranged to actuate another of said. parts to eileet a swinging movement of the tootrest section upon the carriage.
  • a frame adapted for attachment to a chair base, a foot-rest section reciprocally mounted for movement longitudinally upon the frame and also mounted for a swinging movement thereon to dverent predetermined positions, ⁇
  • a frame adapted for attachment to a chair bas, a foot-rest section reciprocally mounted upon the frame and also mounted for a swinging movement thereon to and from different positions, a locking device for holding the section against reciprocation, a second locking device for holding said section in one ot' said positions, and operating means including relatively movable parts for swinging and reciprocating the section and for releasing said locking devices.
  • a frame having one end adapted for attachment to a chair base, a support movable bodily upon tlie frame toward and from said end, a foot-rest section arranged to swing to diterent positions upon the support and to move therewith toward and from said frame end, cooperating parts on the support and section arranged to automatically lock the section when swung to one of said positions, and means inclu-ding relatively movable parts for actuating the support and for swinging the foot-rest section thereon.
  • a frame adapted for attachment to a chair base, a carriage reciprocally mounted for movement longitudinally upon the frame, a footrest section mounted on the carriage to swing from a lowered to a raised position thereon, means interposed between the carriage and section for holding the latter in said raised position, operating means for reciprocating the carriage, parts arranged to be actuated by said operating means for raising the section and means controlled by said parts for releasing the holding means.
  • a fra-me adapted for attachment to a chair base, a carriage reciprocally mounted for movement longitudinally upon the frame, a footrest mounted to swing to different positions upon the carriage and to move bodily therewith, holding means for retaining the footrest in one of said positions, operating means for swinging the foot-rest to the last mentioned position, and means arranged t-o be actuated by t-lie operatng means to effect release of the holding means.
  • a frame adapted for attachment to a chair base, a carriage reciprocally mounted for movement longitudinally upon the frame, a footrest mounted to swing to different positions upon the carriage, holding means interposed between the carriage and toot-rest tor holding the latter in one of said positions, operating means for reciprocating the carriage, means under the control of the operating means for releasing the holding means, and means arranged to automatically lock the carriage on the frame upon return ot the operating means to normal position.
  • a frame adapted for attachment to a chair base, a carriage reciprocally mounted upon the trame, a foot-rest mounted to swing to ditferent positions upon the carriage, a holding device for the 'toot-rest, an actuating device for swinging the foot-rest upon the carriage, means actuated by the toot-rest to lock the carriage when the foot-rest is moved to one of said positions, an operating member for reciprocating the carriage connected with the actuating device for swinging the foot-rest between said positions and means responsive to the actuating device for releasing the holding device upon movement of the operating member with the carriage in a predetermined position.
  • a frame adapted for attachment to a chair base, a carriage movable upon the frame, a footrest mounted to swing upon the carriage, a device for holding the foot-rest in a predetermined position, an operating member 1to1' reciprocating t-he carriage movable relative thereto, an actuating device :tor swinging the 'toot-rest to said predetermined position arranged to be actuated by said operating member, and means responsive to the actuating device for releasing the holding device when the operating member is moved to a predetermined position.
  • a frame adapted for attachment to a chair base, a carriage movable upon the frame, a footrest mounted to swing on the carriage, a device interposed between the carriage and tootrest for holding ⁇ the latter in a predetermined position, an operating member Jfor reciprocating the carriage movable relative thereto, cooperating relatively movable elements connected with the operating member and movable thereby to swing the foot-rest to said predetermined position, and means responsive to one of said elements arranged to effect release of said holding device when the carriage is in a predetermined position.
  • a frame adapted for attachment to a chair base, a carriage movable upon the Jframe, a footrest mounted to swing upon the carriage between a raised and a lowered position, a releasable holding device interposed between the carriage and foot-rest for holding the latter in either of said positions, an operating member for reciprocating the carriage movable relative thereto, means arranged to be actuated by the operating member to swing the foot-rest to said raised position, and a part arranged to be actuated by a portion of said means to release the holding device upon movement of the operating member to a predetermined position when the toot-rest is held in raised position by the holding device.
  • a frame adapted for attachment to a chair base, a carriage reciprocally mounted upon the frame, a foot-rest mounted to swing upon the carriage between predetermined positions, a keeper on the carriage, a holding member for the foot-rest connected therewith and having ⁇ spaced shoulders each arranged to cooperate with the keeper to hold the foot-rest in one of said positions, operating means for moving the carriage, mechanism controlled by said operating means lor swinging the foot-rest between said predetermined positions, and means arranged to be actuated by said mechanism to effect release of the holding member from one of said positions when the operating means is moved to a predetermined position.
  • a frame adapted for attachment to a chair base, a carriage reciprocally mounted upon the i'rame, a foot-rest mounted to swing upon the carriage between predetermined positions, a releasable holding device for the foot-rest interposed between the latter and the carriage, an arm pivoted to swing upon the carriage and arranged to swing the toot-rest to one of said predetermined positions, an operating member pivotally connected with the carriage and arranged for movement in a plane substantially paralleling its pivotal axis to elicct reciprocation of the carriage upon the trame, a link connecting said arm and the operating member, movement of the operating mcmbe about its axis serving to operate the link and arm to effect movement of the foot-rest to one of said positions, and means under the control of the arm for releasing the holding device when the foot-rest is in the last mentioned position.

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  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
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  • Accommodation For Nursing Or Treatment Tables (AREA)
  • Passenger Equipment (AREA)
US184239A 1927-04-16 1927-04-16 Dental chair Expired - Lifetime US1737505A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US184239A US1737505A (en) 1927-04-16 1927-04-16 Dental chair
GB16528/27A GB288958A (en) 1927-04-16 1927-06-21 Improvements in or relating to dental chairs
DER71596D DE518960C (de) 1927-04-16 1927-06-28 Fussruhe fuer zahnaerztliche o. dgl. Stuehle
FR639354D FR639354A (fr) 1927-04-16 1927-07-11 Perfectionnements aux fauteuils de dentistes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US184239A US1737505A (en) 1927-04-16 1927-04-16 Dental chair

Publications (1)

Publication Number Publication Date
US1737505A true US1737505A (en) 1929-11-26

Family

ID=22676108

Family Applications (1)

Application Number Title Priority Date Filing Date
US184239A Expired - Lifetime US1737505A (en) 1927-04-16 1927-04-16 Dental chair

Country Status (4)

Country Link
US (1) US1737505A (fr)
DE (1) DE518960C (fr)
FR (1) FR639354A (fr)
GB (1) GB288958A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100201169A1 (en) * 2009-02-07 2010-08-12 Fox Graig S Dental Chair Toe Cover

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100201169A1 (en) * 2009-02-07 2010-08-12 Fox Graig S Dental Chair Toe Cover

Also Published As

Publication number Publication date
GB288958A (en) 1928-09-21
DE518960C (de) 1931-03-02
FR639354A (fr) 1928-06-20

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