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Publication numberUS2603275 A
Publication typeGrant
Publication dateJul 15, 1952
Filing dateJan 26, 1948
Priority dateJan 26, 1948
Publication numberUS 2603275 A, US 2603275A, US-A-2603275, US2603275 A, US2603275A
InventorsKuebler Carl J J
Original AssigneeKuebler Carl J J
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Adjustable chair
US 2603275 A
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Description  (OCR text may contain errors)

y 1952 c. J. J. KUEBLER I 2,603,275

ADJUSTABLE CHAIR Filed Jan. 26, 1948 Carl J. J. Kueb/er INVENTOR.

Patented July 15, 1952 ()FF-ICE ADJUSTABLE CHAIR Carl J. J. Kuebler, Evansville, Ind.

Application January 26, 1948, Serial No. 4,372 1 This invention relates to similar subject matter of my co-pending application, Ser, No. 772,046, filed September 4th, 1947, now Patent No. 2,486,- 716, for Adjustable Comfort Chair.

An object of this invention is to selectively raise and lower the chair back of a substantially conventional chair and maintain the back in the selected raised and lowered positions.

Another object of this invention is tolock a pair of. arms which are secured to a chair back in selected positions relative to the base of the chair by means of the engagement of a selected tooth in each arm with a protuberance extending within a slot provided in a suitable housing attached to the chair base.

Another object of this invention is to restrict the travel of the arms relative to the housing.

A still further object of this invention is to pivot the chair back and arms in the slot in the housing about a pin as an axis, which pin extends through a suitable opening formed in the arms and by so pivoting the arms release the protuberance from the selected tooth and also by pivoting the arms in the opposite direction, engage the arms with the protuberance by means of a second selected tooth.

A still further object of this invention is to arrange the pin and protuberance in non-horizontal alignment in order that the normal seating on the chair and resting against the back rest will urge the arms to the latched position.

Other objects and features of novelty will become apparent to those skilled in the art, in following the description of the preferred form of the invention, illustrated in the accompanying drawings, wherein;

Figure 1 is an elevational side view of a typical chair having the invention associated therewith;

Figure 2 is an enlarged elevational view of the preferred form of the invention, portions being broken away in sections to illustrate details of construction, and;

Figure 3 is a sectional view taken substantially on a line 33 of Figure 2 and in the direction of the arrows.

This invention has been provided in order to supply a device for adjusting the back rest of a chair in one direction. It is within the purview of the invention to raise and lower the back rest by pivotally actuating the same and then lifting, and maintaining the back rest in the selected raised or lowered position.

A simplified mechanism is one of the intentions of the present invention whereby a simple maneuver is utilized for the adjusting operation. As

3 Claims. (Cl. 155-158) is seenin Figure l the invention isillustrated .as beingattached to the exterior surfaces of certain selectedchair elements. However, this type of chair has been illustrated in, order to best show the invention. It is within the view of the invention to utilize the same in association. with chairs having upholstery therearou-nd for covering the mechanical elements ofthe invention.

Referring to Figure l a chair generally indicated at I0 is provided with a base support 12 and an angularly projecting support; I l extending from the rear portion of the base. A back is supplied and indicated at It and of course, suitable cushions may be utilized in association with the chair.

A rocker foundation i8 is supplied in association with the chair and has an arcuate work surface thereon. A rocker rail 20 is secured to each side of the base 12 for engagement with the arcuate rail surface and feet 22 may be supplied in association with the base in order to limit the travel of the base on the rocker foundation l8.

Attention is now directed primarily to Figure 2 wherein a portion of the housing generally indicated at 24 is illustrated. This housing is composed of a pair of plates 26 and 28 respectively which are separated by means of spacer bars 36 and 32. Screws 34, rivets or the like extend through suitable apertures in the spacers 3H and 32, and two plates 28 and 26 respectively. Of course, the screws then terminate in the base l2 for anchoring purposes.

A slot 35 inclined relative to a horizontal datum is formed in the housing by the above described structure and an arm 38 is slidably received in the inclined slot. This arm is attached to the back !6 through the medium of conventional screws or the like and has a plurality of teeth 40 formed thereon. These teeth are selectively engageable with a protuberance 42 for looking or latching purposes.

The said protuberance 42 is formed in the housing 24 and projects within the slot 36. A pin 44 which is in non-horizontal alignment with the protuberance extends through the aperture or slot 36 and terminates in the end plates 26 and 28.

The pin 44 has an elongated opening 46 positioned thereon, which elongated opening is formed in the said arm 38. By this expedient the arm 38 and consequently the chair back may be pivoted about the pin 44 as an axis and while pivoting in one direction the protuberance 42 is disengaged with the selected teeth 40. The chair back may thus be raised or lowered.

While pivoting the arm 38 and consequently the chair back I6 in the opposite direction, the selected tooth is rendered engageable with the protuberance 42 for locking purposes.

From the foregoing a clear understanding of the structure and operation of the invention is quite apparent. It is obvious, however, that variations may be made without departing from the spirit of the invention.

Having described the claimed as new is:

1. In a chair including a base having an angularly projecting back support forming a stop, a back, and means attached to said back and the base for maintaining said back in selected raised positions, said means including a housing having a slot and secured to the base, a protuberance in said housing and extending in said slot, an arm secured to said back slidably disposed in and passed through said slot, teeth projecting from one edge of said arm engageable with said protuberance, means for restricting the travel of said arm relative to said housing said restricting means comprising a pin in said housing and extending across said slot, and said arm being formed with an elongated opening and said pin being passed through said opening.

2. The combination of claim 1, and said pin being positioned in non-horizontal alignment with said protuberance whereby the arm is pivoted about said pin as an axis to selectively engage and disengage said protuberance with said teeth.

3. In a chair which includes a seat base and a back rest, means fixing said back rest to said base for selected vertical adjustment, said means cominvention, what is prising a slot in said housing and passed through opposite ends thereof, a protuberance disposed in a vertical plane and. projecting inwardly of said slot, a fiat arm secured to said back rest and projecting therebelow, said arm being disposed in said slot and having an elongated aperture therein, teeth formed on one edge of said arm and releasably engageable by said protuberance to hold said arm in selected positions, a pin passed through said aperture in said arm and through said slot in said housing pivotally mounting said arm in said housing and providing for restricted vertical movement of said arm with respect to said housing, and said pin having its longitudinal axis in a plane perpendicular to the plane having said protuberance therein.

CARL J. J. KUEBLER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 121,470 Hankin Dec. 5, 1871 204,207 Edgar May 28, 1878 659,411 McAuley Oct. 9, 1900 1,256,856 Wittwer Feb. 19, 1918 1,306,738 Beasant June 17, 1919 1,473,541 Berninghaus Nov. 6, 1923 1,596,316 Singleton Aug. 17, 1926 2,091,733 Hemminger Aug. 31, 1937 FOREIGN PATENTS Number Country Date 538,255 Great Britain July 25, 1941

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US121470 *Dec 5, 1871 Improvement in school-desks and seats
US204207 *Jun 11, 1877May 28, 1878 Improvement in school-desks
US659411 *Apr 27, 1897Oct 9, 1900Paul S McaulaySchool desk and seat.
US1256856 *Sep 14, 1916Feb 19, 1918John J Wittwer SrChair.
US1306738 *Oct 9, 1916Jun 17, 1919 Combined desk and seat
US1473541 *Nov 22, 1920Nov 6, 1923Eugene Berning Haus CompanyBarber chair
US1596316 *Dec 29, 1925Aug 17, 1926Singleton Eustace MAutomobile seat
US2091733 *Sep 24, 1936Aug 31, 1937Hawks Cecil WAdjustable chair back
GB538255A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3093415 *Aug 1, 1961Jun 11, 1963Gen Motors CorpReclining seat back
US3291527 *Mar 7, 1966Dec 13, 1966Bostrom CorpVertical adjustable back
US4015878 *Jan 16, 1976Apr 5, 1977Perkins Charles MChair construction for long use comfort
US5695251 *Mar 6, 1996Dec 9, 1997Giorgetti S.P.A.Variable-inclination headrest for a bed, armchair, divan and the like
US6250715Jan 20, 1999Jun 26, 2001Herman Miller, Inc.Chair
US6367876Apr 11, 2001Apr 9, 2002Herman Miller, Inc.Chair
US6386636Apr 11, 2001May 14, 2002Herman Miller, Inc.Chair
US6402247 *Apr 28, 2000Jun 11, 2002Gervase A. SchmittMulti-angle seat back for a boat helm steering seat
US6598937May 6, 2002Jul 29, 2003Herman Miller, Inc.Adjustable backrest
US6969117 *Sep 17, 2003Nov 29, 2005King Furniture Pty Ltd.Backrest assembly for a seating arrangement
US7004543Aug 24, 2004Feb 28, 2006Herman Miller, Inc.Chair
US8262162Apr 11, 2011Sep 11, 2012Herman Miller, Inc.Biasing mechanism for a seating structure and methods for the use thereof
Classifications
U.S. Classification297/353, 297/357
International ClassificationA47C1/022, A47C1/026
Cooperative ClassificationA47C1/026
European ClassificationA47C1/026