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Publication numberUS855656 A
Publication typeGrant
Publication dateJun 4, 1907
Filing dateMar 11, 1907
Priority dateMar 11, 1907
Publication numberUS 855656 A, US 855656A, US-A-855656, US855656 A, US855656A
InventorsThomas J Mcnamara Jr, George Krummen
Original AssigneePhoenix Carriage Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Adjustable back for cushion-seats.
US 855656 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

No. 855,656. PATENTED JUNE 4, 1907.



Wit messes @2 a 4 53, (2 1 d TINTTE STATES PATEN FETCH.




Specification of Letters Patent.

Patented June 4, 1907.

Application filed March 11, 1907. Serial No. 361,648.

To (all whom it may concern.-

Be it known that we, THOMAS J. MONA- MARA, Jr., and GEORGE KRUMMEN, both citizens of the United States of America, and residents of Cincinnati, county of Hamilton, State of Ohio, have invented certain new and useful Improvements in Adjustable Backs for Cushion-Seats, of which the following is a specification.

Our invention relates to adjustable seatbacks adapted for use in connection with carriage and other similar seats. One of its objects is to provide simple and reliable means by which the Outline of the cushion or upholstered back may be changed at will to alford changes of position in order to rest an occupants back.

Another object is to provide simple and eflicient means for imparting a yielding movement to the parts which serve to distend the back.

It further consists in certain details of form, combination and arrangement, all of which will be more fully set forth in the description of the accompanying drawings, in which,

Figure 1 is a side elevation of a buggy-seat partly in section, embodying my improvements, and showing the back in its retracted position. Fig. 2 is a similar view showing the position of the parts when the back is in its distended position. Fig. 3 is an end view of the back-frame with the cushion removed, showing our improved mechanism to retract the cushions attached thereto. Fig. 4 is a cross or horizontal section through the back, showing a modified form of the mechanism illustrated in Fig. 1, in position to extend the back. Fig. 5 is a front elevation of the yoke frame and end pieces shown in Fig. I; Fig. 6 is a view similar to Fig. 4 showing a modifi cation in which the back-extending mechanism is yieldingly held in position.

In the accompanying drawings, A, represents the carriage seat frame, and B, the baclei'rame to which the upholstered back, 0, is attached. The upholstery preferably comprises a leather or other exterior surface material, 0, a cushion of curled hair or similar material, 0, and a backing diaphragm, 0 preferably of strong burlap, between which and the frame, B, is located the mechanism for changing the contour of the cushions.

This mechanism comprises a yoke-shaped bar, D, the ends, (Z of which are ournaled in brackets, E, attached at opposite sides to the frame, B. As shown in Fig. 3, the yokeframe, D, is flattened at d, and to its face is attached a rounded facing strip, d, preferably of wood. One end of the yoke-frame is extended out of the cushion, being provided with a rectangular seat, (P, to receive an operating lever, d

In the positions shown in Figs. 1 and 3, the central portion, (1, of the yoke-frame lies close against the back-frame, B, occupying but little space and the cushion, C, is near] flat and also lies close against the backframe, B.

When it is desired to have a curved or fullcushioned back, the lever, d, is turned through an angle of ninety degrees from the position shown in Fig. 1, which causes the yoke-frame to turn in its bearings, E, thereby swinging the central portion, (Z,'of the yoke-frame outward at right angles to the frame, B. This in turn forces the cushion, O, away from the frame, B, and burlap, 0 which is secured at top and bottom to frame, B, is held tight at the center across the facing strip, d, of yoke, D, thereby holding the cushion, C, in the desired position.

In the modification shown in Figs. 4 and 5, the yoke-frame, F, is constructed of two metal end pieces, f, f, which seat in the brackets, E, of frame, B. These end pieces f,f, are attached at f f, to opposite ends of a wooden cross bar, F, which is wide enough to act in the same manner as the frame, D, the end pieces, f, f, being attached at one edge of the bar, F, so that its other or projecting edge will serve when in the position shown in Fig. 4, to extend the cushion, while when turned to the other position, the bar, F, will lie close against the backframe, B.

In the modification shown in Fig. 6, the end pieces, h, h, journal in brackets, E, of frame, B, and are provided at their inner ends with sockets in which are seated the ends, 7L2, h of the yoke-frame, H. 72/, represent nuts or collars to retain the ends, 72 7L in their respective sockets, and h, if, represent springs coiled around the ends of yoke-frame, H, so that when the cushion, C, is extended by said yoke-frame, the yokeframe, 11, Will yield to pressure against the cushion by reason of the springs, h, 717, and the sliding of the ends, 7L2, it in their respective sockets in end pieces, h, h.

The mechanism herein illustrated and described is capable of considerable modification Without departing from the principle of our invention.

Having described our invention, What We claim is:

1. In an article of the character indicated a back-frame, a cushion attached to the edges of said frame, and a yoke-frame interposed between said back-frame and cushion, said yoke-frame being pivotally attached to the back-frame and adapted to be shifted so as to lie close against the back-frame, or to be extended therefrom to alter the shape of the cushion.

2. In an article of the character indicated in combination With a back-frame and cushion, a yoke-frame interposed. between said cushion and back-frame, said yoke frame being pivotally attached to said backframe and adapted to be shifted to varying positions relative thereto to alter the shape of the cushions and an exteriorly located shifting lever.

3. In an article of the character indicated in combination With a back-frame a flexible cushion attached thereto at its edges, a yokeframe interposed between said back-frame and cushion, said yoke-frame being pivotally attached to the back-frame and provided With a shifting lever.

4. In an article of the character indicated in combination With a back-frame and a cushion attached together at their edges, a yoke-frame interposed between said cushion and baclcfrarne and pivotaily attached to said back-frame, the central portion of said yoke-frame being yieldingly supported relative to its pivots.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2550831 *Jul 1, 1949May 1, 1951Lingenfelter Robert EAdjustable means for changing the contour of seat back rests
US3014757 *Aug 12, 1959Dec 26, 1961Middletown Mfg CompanyReclining chair of multi-action type
US3121592 *Aug 29, 1962Feb 18, 1964Gen Fireproofing CoPosture chair
US3464754 *Jan 17, 1967Sep 2, 1969Rex Stroll O Chair CoOrthopedic chair
US3596990 *Jan 2, 1969Aug 3, 1971Berger JacobOrthopedic chair
US3642319 *Feb 6, 1969Feb 15, 1972Berchicci EmilioDevice for anatomically positioning the human body against a seat back
US3806968 *Mar 13, 1972Apr 30, 1974Bekins Moving & Storage CoOrthopaedic back support appliance
US3807794 *Dec 29, 1972Apr 30, 1974Ford Motor CoLumbar support mechanism
US3938858 *Dec 2, 1974Feb 17, 1976Fritz DrabertChair with adjustable backrest
US4944554 *Jul 12, 1989Jul 31, 1990Gross Clifford MActive biomechanical chair
US6261213Jan 19, 2000Jul 17, 2001Mark FreyLumbar exercise and support apparatus for vehicle seat
US7731286 *Sep 1, 2008Jun 8, 2010Yao-Chuan WuBackrest assembly
US7997650 *Feb 23, 2009Aug 16, 2011Schukra Of North AmericaConstant pressure retreating lumbar system
US20040097351 *Nov 14, 2002May 20, 2004Tornabene Dean G.Trunk exercise device
US20090212616 *Feb 23, 2009Aug 27, 2009Schukra Of North AmericaConstant Pressure Retreating Lumbar System
US20100052399 *Sep 1, 2008Mar 4, 2010Yao-Chuan WuBackrest Assembly
Cooperative ClassificationA47C7/465