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US2722970A - Extension for a tubular chair leg - Google Patents

Extension for a tubular chair leg Download PDF

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Publication number
US2722970A
US2722970A US26443352A US2722970A US 2722970 A US2722970 A US 2722970A US 26443352 A US26443352 A US 26443352A US 2722970 A US2722970 A US 2722970A
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Prior art keywords
leg
extension
associated
chair
end
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Legal status (The legal status 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 status listed.)
Expired - Lifetime
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Herman H Stechmann
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William C Uphoff
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    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C3/00Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/20Chairs or stools with vertically-adjustable seats
    • A47C3/26Chairs or stools with vertically-adjustable seats with vertical, or inclined toothed rack; with peg-and-notch mechanism
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47BTABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B91/00Feet for furniture in general
    • A47B91/02Adjustable feet
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S16/00Miscellaneous hardware, e.g. bushing, carpet fastener, caster, door closer, panel hanger, attachable or adjunct handle, hinge, window sash balance
    • Y10S16/39Adjustment means
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00Joints and connections
    • Y10T403/32Articulated members
    • Y10T403/32254Lockable at fixed position
    • Y10T403/32426Plural distinct positions
    • Y10T403/32442At least one discrete position
    • Y10T403/32451Step-by-step adjustment

Description

Nov. 8, 1955 H. H. STECHMANN EXTENSION FOR A TUBULAR CHAIR LEG Filed Jan. 2, 1952 IN VEN TOR.

Ti 1i dm r nnnrvv United States Patent EXTENSION FOR A TUBULAR CHAIR LEG Herman H. Stechmann, Davenport, Iowa, assignor of onehalf to William C. Upholf, Moline, lll.

Application January 2, 1952, Serial No. 264,433

2 Claims. (Cl. 155-88) This invention relates to chairs having tubular legs and has for its object, the provision of means for extending the legs of such chairs to make them usable for small children, so they can eat conveniently and comfortably at a dining table of regular height. These extensions are frictionally held in place within the legs of a chrome chair and, when needed, can be pulled out to their full length and will then be held against return, automatically, in this extended position.

In the drawings annexed hereto and forming a part hereof,

Fig. 1 is a perspective view of a chair with tubular legs such as are commonly termed chrome chairs, the same being shown equipped with leg extensions;

Fig. 2 represents a section taken substantially along the plane indicated by the line 22 in Fig. 1; and

Fig. 3 is an enlarged view of a shell assembly shown in Fig. 2.

The chair as illustrated by Fig. l is provided with hollow legs 1, and in each of these legs is inserted an extension 2. In this extension is formed a plurality of holes in which extensions are inserted spring shells 4 having plungers 6 actuated by springs 5. The inner ends of each of the plungers 6 is provided with a radially outwardly extending flange 7, the diameter of which is approximately the same as, but not larger than, the internal diameter of the shells 4. As will be seen from Fig. 2, portions 8 at the outer ends of the shells 4 overlie the associated flanges 7 and prevent the springs from moving the plungers 6 entirely out of the shells 4, especially in the case of the lowermost plunger 6 in the extension adjustment shown in Fig. 2. When it is desired to reduce the chair to its normal height, the plungers can be pushed into the shells 4, and then the leg ex tensions 2 can be pushed up into the legs 1.

In the lower end of each leg extension 2 is tightly fitted a plug in the nature of a foot 3, which is made, customarily, of very smooth plastic, or of rubber or rubber-like material, to prevent the leg extension 2 from scratching a polished floor. Also, these feet 3, having a greater circumference than that of the leg extensions 2, prevent the leg extensions from going entirely up into the chair legs 1, and which would make it difiicult to withdraw them when it is desired to have the chair higher than originally intended.

As each leg extension 2 is pulled out ready for use, one of the lower plungers 6 protrudes from one of the holes in the leg extension 2 in order to keep the leg extension from slipping too far back into the chair leg 1, while the plunger 6 which is nestled within the chair leg as well as being within the leg extension 2, reacts directly against the inside of the chair leg 1 to keep the leg extension 2 from falling out of the chair leg. By reason of the plurality of plungers 6, it is possible to adjust the height of the chair by diiferent amounts by pulling the leg extension 2 out different distances so that at difierent times different ones of the plungers 6 keep the leg extension 2 projected the desired amount.

It is of course understood that the specific description of structure set forth above may be departed from without departing from the spirit of this invention as disclosed in this specification and as defined by the appended claims.

Having now described my invention, 1 claim:

1. A chair including hollow legs of tubular construction open at their lower ends, a tubular extension for each leg, each extension having an outer diameter substantially the same as the inner diameter of the associated tubular leg, so as to fit slidably but snugly therein, each extension having a plurality of openings in the wall thereof, a plurality of shells secured in the openings, one for each opening, each being a hollow cup-like member closed at its inner end and open at its outer end, the diameter of the outer end being appreciably larger than the diameter of the opening in the associated leg extension, in coaxial relation to the associated opening, and a spring and plunger in each shell, each plunger comprising a hollow part having at its inner end a radially outwardly extending flange abutting against the wall portion surrounding the associated opening to limit the outward movement of the plunger, said spring being positioned between the closed end of the associated shell and the outer end of said plunger, the major portion of the latter lying outwardly of the associated opening in order to be engageable with the lower end of the associated hollow leg for preventing the upward movement of the associated extension relative thereto, the outer end of each plunger being rounded to facilitate manual depression of the plunger into the supporting shell to telescope the leg extension into the associated leg.

2. A chair including hollow legs of tubular construction open at their lower ends, a tubular extension for each leg, each extension having an outer diameter substantially the same as the inner diameter of the associated tubular leg, so as to fit slidably but snugly therein, each extension having a plurality of openings in the wall thereof, a plurality of shells, one for each opening, each being a hollow cup-like member closed at its inner end and open at its outer end, in coaxial relation to the associated opening, a spring and plunger in each shell, each plunger comprising a hollow part having at its inner end a radially outwardly extending flange, and said extension wall having means surrounding each of the openings therein and extending inwardly in a position to engage the flange of the associated plunger to limit the outward movement of the latter, each of said springs being positioned between the closed end of the associated shell and the outer end of said plunger, the major portion of the latter lying outwardly of the associated opening in order to be engageable with the lower end of the associated hollow leg for preventing the upward movement of the associated extension relative thereto.

References Cited in the file of this patent UNITED STATES PATENTS 241,728 Saunders May 17, 1881 942,490 Dunn Dec. 7, 1909 1,039,759 Knight Oct. 1, 1912 1,520,589 Matkovic Dec. 23, 1924 2,329,601 Frye Sept. 14, 1943 2,378,852 James June 19, 1945 2,546,871 Schley Mar. 27, 1951 FOREIGN PATENTS 367,559 France Nov. 5, 1906 570,620 Germany Mar. 6, 1932

US2722970A 1952-01-02 1952-01-02 Extension for a tubular chair leg Expired - Lifetime US2722970A (en)

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US2722970A US2722970A (en) 1952-01-02 1952-01-02 Extension for a tubular chair leg

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US2722970A US2722970A (en) 1952-01-02 1952-01-02 Extension for a tubular chair leg

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Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2854303A (en) * 1957-09-19 1958-09-30 Neil H Mcinnis Extensible support for tables
US2875008A (en) * 1955-05-09 1959-02-24 Herman C Angstreich Rotatable leg hinge and cover for table
US2892647A (en) * 1954-05-03 1959-06-30 Ralph A O'neill Releasable locking mechanism for telescoping members
US2917104A (en) * 1957-04-18 1959-12-15 Martin Richtel Adjustable chair
US2933275A (en) * 1955-11-04 1960-04-19 Wimmersperg Heinrich Ferdi Von Extensible, telescoping legs for supports
US3006706A (en) * 1959-09-18 1961-10-31 Metropolis Bending Company Extensible leg
US3043438A (en) * 1960-06-13 1962-07-10 Jerry H Chmielewski Clothes pole
US3043641A (en) * 1958-09-26 1962-07-10 De Witt W Hanmore Adjustable supports
US3053298A (en) * 1959-12-07 1962-09-11 Robert J Stamp Golf club separator
US3103375A (en) * 1961-04-07 1963-09-10 Earl L Mcmullin Telescoping pole
US3159855A (en) * 1960-11-22 1964-12-08 Oakland Corp Plug inserting mechanism
US3164351A (en) * 1962-01-08 1965-01-05 Leo F Rembowski Extensible support leg
US3246768A (en) * 1963-06-13 1966-04-19 Sol Rac Inc Garment storage and display rack
US3405972A (en) * 1967-05-10 1968-10-15 Charles L. Morris Stair chair
US3622114A (en) * 1969-07-01 1971-11-23 Mc Donnell Douglas Corp Pallet assembly
US3843996A (en) * 1972-01-04 1974-10-29 R Sobel Flexible hinge assembly
US3861629A (en) * 1973-05-23 1975-01-21 Walter B Merrill Tree stand
DE2747777A1 (en) * 1977-10-25 1979-04-26 Kirschbaum Albrecht Von Supporting frame for chair - consists of hub with hole into which fits tubular column, with legs attached to hub
US4183317A (en) * 1977-10-12 1980-01-15 Follick George E Versatile all purpose barricade structures
US4978098A (en) * 1989-09-01 1990-12-18 Roger Peckinpaugh Adjustable support
US5022617A (en) * 1989-11-15 1991-06-11 Henderson Robert M Collapsible valet
US5060896A (en) * 1987-05-08 1991-10-29 Hobbins John C Furniture adjustment device
US5127647A (en) * 1990-06-04 1992-07-07 Wilkinson William T Portable, adjustable exercise step/bench
US5291875A (en) * 1992-10-16 1994-03-08 Modern Home Products Corp. Adjustable tube assembly for a gas barbecue grill
US5333825A (en) * 1992-09-25 1994-08-02 Christensen Emeron P Furniture elevating device
DE4319125A1 (en) * 1993-06-09 1994-12-15 Hartman Groep Bv Piece of standing furniture with length-adjustable legs and supporting feet permitting the length-adjustability
US5462248A (en) * 1993-09-02 1995-10-31 Suspa Compart Aktiengesellschaft Longitudinally adjustable column for chairs, tables or the like
US5560573A (en) * 1995-09-07 1996-10-01 Self-Realization Fellowship Church Portable detachable meditation armrest support
US5899422A (en) * 1997-04-18 1999-05-04 Roman Wieland Adjustable furniture leg extension
US6290628B1 (en) * 1990-09-26 2001-09-18 William T. Wilkinson Aerobic climbing step/bench device
GB2370495A (en) * 2000-12-01 2002-07-03 Chub Leisure Ltd Folding leisure chair or stool
US6467747B1 (en) * 1999-11-19 2002-10-22 Western Highway Products, Inc. Breakaway signpost
WO2006040504A1 (en) * 2004-10-16 2006-04-20 Philip Nixon An improved furniture raiser
US20060175512A1 (en) * 2004-12-31 2006-08-10 Beno Corporation Adjustable lift support apparatus
US20070256611A1 (en) * 2006-05-08 2007-11-08 Tsung-Chieh Huang Telescopic and foldable table
US20080075530A1 (en) * 2006-09-22 2008-03-27 The Hong Kong Polytechnic University Bollard with connecting mechanisms for connecting railings
US8979185B1 (en) 2014-08-18 2015-03-17 Ray H. Redel Two-position folding chair

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US241728A (en) * 1881-05-17 Chair
FR367559A (en) * 1906-06-29 1906-11-05 Oscar Zerkowitz Telescoping tubes to support tripods, rods and other fishing products
US942490A (en) * 1908-12-04 1909-12-07 William John Dunn Telescopic article.
US1039759A (en) * 1911-07-18 1912-10-01 Jonathan Lee Knight Mezzanine-chair.
US1520589A (en) * 1924-12-23 Chibopbactic posture stool
DE570620C (en) * 1933-02-17 Bruno Knittel Projection tube, especially for tripods
US2329601A (en) * 1942-04-20 1943-09-14 Harry H Frye Power transmission means
US2378852A (en) * 1943-05-27 1945-06-19 Robert H Jamison Adjustable table and like furniture
US2546871A (en) * 1948-04-22 1951-03-27 Schley Laura Walker Chair having vertically adjustable footrest

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US241728A (en) * 1881-05-17 Chair
US1520589A (en) * 1924-12-23 Chibopbactic posture stool
DE570620C (en) * 1933-02-17 Bruno Knittel Projection tube, especially for tripods
FR367559A (en) * 1906-06-29 1906-11-05 Oscar Zerkowitz Telescoping tubes to support tripods, rods and other fishing products
US942490A (en) * 1908-12-04 1909-12-07 William John Dunn Telescopic article.
US1039759A (en) * 1911-07-18 1912-10-01 Jonathan Lee Knight Mezzanine-chair.
US2329601A (en) * 1942-04-20 1943-09-14 Harry H Frye Power transmission means
US2378852A (en) * 1943-05-27 1945-06-19 Robert H Jamison Adjustable table and like furniture
US2546871A (en) * 1948-04-22 1951-03-27 Schley Laura Walker Chair having vertically adjustable footrest

Cited By (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2892647A (en) * 1954-05-03 1959-06-30 Ralph A O'neill Releasable locking mechanism for telescoping members
US2875008A (en) * 1955-05-09 1959-02-24 Herman C Angstreich Rotatable leg hinge and cover for table
US2933275A (en) * 1955-11-04 1960-04-19 Wimmersperg Heinrich Ferdi Von Extensible, telescoping legs for supports
US2917104A (en) * 1957-04-18 1959-12-15 Martin Richtel Adjustable chair
US2854303A (en) * 1957-09-19 1958-09-30 Neil H Mcinnis Extensible support for tables
US3043641A (en) * 1958-09-26 1962-07-10 De Witt W Hanmore Adjustable supports
US3006706A (en) * 1959-09-18 1961-10-31 Metropolis Bending Company Extensible leg
US3053298A (en) * 1959-12-07 1962-09-11 Robert J Stamp Golf club separator
US3043438A (en) * 1960-06-13 1962-07-10 Jerry H Chmielewski Clothes pole
US3159855A (en) * 1960-11-22 1964-12-08 Oakland Corp Plug inserting mechanism
US3103375A (en) * 1961-04-07 1963-09-10 Earl L Mcmullin Telescoping pole
US3164351A (en) * 1962-01-08 1965-01-05 Leo F Rembowski Extensible support leg
US3246768A (en) * 1963-06-13 1966-04-19 Sol Rac Inc Garment storage and display rack
US3405972A (en) * 1967-05-10 1968-10-15 Charles L. Morris Stair chair
US3622114A (en) * 1969-07-01 1971-11-23 Mc Donnell Douglas Corp Pallet assembly
US3843996A (en) * 1972-01-04 1974-10-29 R Sobel Flexible hinge assembly
US3861629A (en) * 1973-05-23 1975-01-21 Walter B Merrill Tree stand
US4183317A (en) * 1977-10-12 1980-01-15 Follick George E Versatile all purpose barricade structures
DE2747777A1 (en) * 1977-10-25 1979-04-26 Kirschbaum Albrecht Von Supporting frame for chair - consists of hub with hole into which fits tubular column, with legs attached to hub
US5060896A (en) * 1987-05-08 1991-10-29 Hobbins John C Furniture adjustment device
US4978098A (en) * 1989-09-01 1990-12-18 Roger Peckinpaugh Adjustable support
US5022617A (en) * 1989-11-15 1991-06-11 Henderson Robert M Collapsible valet
US5127647A (en) * 1990-06-04 1992-07-07 Wilkinson William T Portable, adjustable exercise step/bench
US6290628B1 (en) * 1990-09-26 2001-09-18 William T. Wilkinson Aerobic climbing step/bench device
US5333825A (en) * 1992-09-25 1994-08-02 Christensen Emeron P Furniture elevating device
US5291875A (en) * 1992-10-16 1994-03-08 Modern Home Products Corp. Adjustable tube assembly for a gas barbecue grill
DE4319125A1 (en) * 1993-06-09 1994-12-15 Hartman Groep Bv Piece of standing furniture with length-adjustable legs and supporting feet permitting the length-adjustability
US5462248A (en) * 1993-09-02 1995-10-31 Suspa Compart Aktiengesellschaft Longitudinally adjustable column for chairs, tables or the like
US5560573A (en) * 1995-09-07 1996-10-01 Self-Realization Fellowship Church Portable detachable meditation armrest support
US5899422A (en) * 1997-04-18 1999-05-04 Roman Wieland Adjustable furniture leg extension
US6467747B1 (en) * 1999-11-19 2002-10-22 Western Highway Products, Inc. Breakaway signpost
GB2370495A (en) * 2000-12-01 2002-07-03 Chub Leisure Ltd Folding leisure chair or stool
WO2006040504A1 (en) * 2004-10-16 2006-04-20 Philip Nixon An improved furniture raiser
GB2423015A (en) * 2004-10-16 2006-08-16 Philip Nixon An improved furniture raiser
GB2423015B (en) * 2004-10-16 2007-04-11 Philip Nixon An improved furniture raiser
US20060175512A1 (en) * 2004-12-31 2006-08-10 Beno Corporation Adjustable lift support apparatus
US7344117B2 (en) * 2004-12-31 2008-03-18 Benq Corporation Adjustable lift support apparatus
US20070256611A1 (en) * 2006-05-08 2007-11-08 Tsung-Chieh Huang Telescopic and foldable table
US7631604B2 (en) * 2006-05-08 2009-12-15 Tsung-Chieh Huang Telescopic and foldable table
US20080075530A1 (en) * 2006-09-22 2008-03-27 The Hong Kong Polytechnic University Bollard with connecting mechanisms for connecting railings
US7722283B2 (en) * 2006-09-22 2010-05-25 The Hong Kong Polytechnic University Bollard with connecting mechanisms for connecting railings
US8979185B1 (en) 2014-08-18 2015-03-17 Ray H. Redel Two-position folding chair

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