USRE10906E - Surgical chair - Google Patents

Surgical chair Download PDF

Info

Publication number
USRE10906E
USRE10906E US RE10906 E USRE10906 E US RE10906E
Authority
US
United States
Prior art keywords
frame
seat
chair
yoke
arms
Prior art date
Application number
Other languages
English (en)
Inventor
Frank K Case
Publication date

Links

Images

Definitions

  • My invention relates to surgical chairs; and it consists in various novel features of construction by which the chair is rendered eapable of adjustment in a variety of ways, as hereinafter fully pointed out.
  • Figure 1 is a perspective view ofv my improved chairinits normal adjustment;
  • Fig. 2 a side view showing the back, the head-rest, and the foot-rest thrown into the same horizontal plane;
  • Fig. 3 a vertical sectional view in which the back is shown in a horizontal position and the footrest dropped down to its normal position;
  • Fig. 4 a perspective view showing the main supporting parts separated and raised one above another to illustrate their relative positions and the manncr/ ol' assembling them;
  • Figs. 5 and 6 perspective views of certain details;
  • Fig. 7, a view illustrating a slight modification.
  • the l'eet are ad visably furnished with casters for convenience in moving the chair about.
  • the base or frame A is formed with two upright side arms or standards, a a, between and to which is hung a yoke, B, the l'orm of which is shown ures, the yoke or swinging frame B has two upright arms, b b, which when the yoke is in position fit close to the inner faces ol' the standards or upright arms a a of the base, to which they are attached by pivot bolts or pins c c, Figs. 1 and 2.
  • a central tubular neck, e rises to about the height ol' said arms, as shown in Fig. 4, and beneath said bar, and in line with the neck e, a depending extension, f, is formed, the lower end ol'which is divided into three parts or branches,A y, li, and separated one from another a short distance.
  • the outer branches, g and fi are notched or beveled to form teeth j, those of one branch facing in a direction opposite to those of the other branch, as shown in Fig. 4.
  • teeth are designed to engage with two bars or racks, k k, having similarlyreversed teeth, which racks are formed upon a locking-frame, C, pivoted in base A and having a limited vertical movement therein.
  • the locking-frame C is normally held up in engagement with the teeth jj by meausoi' springs l, placed beneath projecting ears m and resting upon cross bars or braces a of the base-frame A.
  • the rack-bars lc k are separated to correspond with thebranehes g i of the depending extcnsionfof the swinging frame B, and the middle branch, It, of said extension passes between said bars, which thus serve to retain the parts in proper relation and to guide the depending extension f in its movement over the rack.
  • the tubular neck lcof yoke B is threaded in' ternally to receive a correspondi ngly-threaded stem, D, which carries at its upper en d the rotary frame E, which supports the body of the chair.
  • the screw permits the height of the chair to be varied as desired, as in other chairs of like construction.
  • This clamp consists of three parts,
  • the parts 2o p and q are levers provided with perforated ears r', by which they are connected with similarly-perforated lugs s, formed uponand depending from the rotary frame E on opposite sides of thescrew-stern D.
  • the partq is made with a loop or band, t, which encircles the screw-stenrand the neck e, and the partp is provided above its pivot with a threaded hole, u, to receive the thumh-screw r, which forms the third part of the clamp, and which, by bearing against the loop t, forces the upper ends of parts p q apart, tb rows their lower ends toward each other. and causes them to firmly clasp the neck e of the yoke B.
  • the yoke cannot rotate, and as the parts p q are pivoted to the rotaryframe, saidf frame and yoke are firmly held together and the frame is held against rotation.
  • the rotary frame E consists of a substantially-horizontal 5o cross-bar somewhat longer than the width of the chair seat and back, and having at its end an upright or vertical portion consisting of two arms or branches, c and w.
  • the body of the chair consists of a back, G, a seat, H, a leg-rest, I, and arms J, and to these three parts are addeda head-rest, K, and foot-rest L.
  • the back G is supported between the arms 'v by pivots ai, on which it may be tipped to 6o any position from vertical to horizontal.
  • I pivot to its lower end at one or at bothsides, preferably both sides,aslotted link, M, advisably curved, as shown.
  • a rod, N
  • both ends of said rod being furnished with a. hand-piece or lever, so that it may be controlled from either end.
  • the rod is threaded neareach end, the direction of the threads at opposite ends being reversed, one being right and-the other left.
  • a correspondnglythreaded nut, O having a lug. y, extending into the slot of the link M, against which the nut rests, the lug serving to preventv the nut from turning with the rod.
  • the arms J are jointed to the back G above the pivotal supports of the latter, and they are similarly jointed to ,L-shaped blocks or levers P, which are in turnpivoted to the forward arms, ⁇ w, of the rotary frame E.
  • ,L-shaped blocks or levers P which are in turnpivoted to the forward arms, ⁇ w, of the rotary frame E.
  • This brace is constantly drawn toward the swing-frame R by a spring, V,which is attached at one end to the brace and at the other end to the rod Q.
  • the purpose of this brace is to hold the swingframe Rin the proper position relatively to the other' parts, and thereby to bring about and maintain a certain desiredv relation between the back and seat.
  • the leg-rest is a tixture upon the bars W,
  • the footl rest is simply a at board or platform ot wood or metal, and is formed with ears or lugs b', extending backward in rear of its pivots. To each of these ears or ings I attach one end of a rod or brace, X, the other end of which is attached to one of the hangers z, as shown in Fig. 7, at the same distance from the pivot c' of bar W as the' lower cud of the brace is from the pivot d ot' the foot-rest.
  • This construction and arrangement causes the foot-rest to maintain at all times a horizontal position, regardless of the inclination of the leg-rest, the position of the seat, or that of the back.
  • 'lhe bars ⁇ V are cach provided with a swinging hook, Y, adapted to engage with a stud or pin, e', of which there is one on the inner face of each end plate of swingframe R.
  • the hooks are locked upon ⁇ the studs or pins, they canse the leg and foot rests to move with the swingtframe It; hence whenever the brace U is in engagmncnt with said frame and the back is thrown down the seat is raised into the saine plane with the back, and the leg-rest and foot rest are raised to thesaine horizontal plane, thus forming one continuous level surface. as in Fi g. 2.
  • the headrest K is carried by two slotted bars-, f, moving in guides or eyes g at the back ofthe chair, and by clamping-screws h', passing through slotted brackets z" and serving to bind and hold the bars wherever adjusted.
  • the branches g and i provided with teeth j, and locking-frame C, provided with toothed racks k k. adapted to engage the teeth] to hold thev yoke at any desired inclination.
  • a chair the combination of a base, a yoke or frame suspended in said base, a stem free to rotate in said yoke and serving ⁇ to support the body of the chair, aelamp adapted to lock said stem against rotation, and a locking Ils device adapted to engage the swinging yoke and tohold itat any desired inclination, whereby the body ol' the chair may be tipped to any desired angle forward, backward, or to either side.
  • a surgical chair the combination of a base, a frame or yoke mounted therein and adapted to rock or tip laterally, a locking device adapted to engage with and to hold the frame or yoke at any desired angle of adjustment, and a vertical stem swiveled in said yoke and supporting ⁇ the entire chair-body.
  • a chair the combination of a base, a yoke or frame suspended therein and adapted to tip or rock laterally, adapted to engage said yoke it in any desired inclination, and a chair-body supported by said yoke or frame and pivotally attachedthereto, whereby the chair-body m'ay be tipped to any desired angle forward and backward,'the chair-body being connected with the yoke or frame by a swivel, whereby or frame and hold fit is adapted Ito rotate independently of the yoke or frame.

Family

ID=

Similar Documents

Publication Publication Date Title
US455168A (en) Dental chair
US336387A (en) Adjustable chair
USRE10906E (en) Surgical chair
US360279A (en) Surgical chair
US320265A (en) Adjustable recli n ing-ch
US483900A (en) Surgical chair
US576480A (en) Chair
US248752A (en) John huston
US327775A (en) dodge
US482745A (en) Chair
US538407A (en) Dental chair
US343654A (en) Reclining chair
US300228A (en) Convertible chair
US795535A (en) Reclining-chair.
US415307A (en) Dental chair
US530159A (en) Surgical chair
US482520A (en) And charles
US271596A (en) browne
US196381A (en) Improvement in barbers chairs
US383206A (en) Adjustable chair and swing
US435224A (en) Adjustable chair
US612988A (en) crarball
US140868A (en) Improvement in invalid-chairs
US343216A (en) Surgical chair
US318795A (en) Recltning-chair