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Publication numberUS3206235 A
Publication typeGrant
Publication dateSep 14, 1965
Filing dateAug 30, 1962
Priority dateAug 30, 1962
Publication numberUS 3206235 A, US 3206235A, US-A-3206235, US3206235 A, US3206235A
InventorsDon Albinson, Gerard Robinson
Original AssigneeMiller Herman Inc
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Adjustable foot piece
US 3206235 A
Images(2)
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Description  (OCR text may contain errors)

p 14, 1965 D. ALBINSON ETAL 3,206,235

ADJUSTABLE FOOT PIECE Filed Aug. 30, 1962 2 Sheets-Sheet 1 Sept. 14, 1965 ALBINSON ETAL 3,205,235

ADJUSTABLE FOOT PIECE Filed Aug. 30, 1962 2 Sheets-Sheet 2 4 Tram/5K5 United States Patent 3,206,235 ADJUSTABLE F001 PIECE Don Alhinson, Culver City, and Gerard Robinson, San Pedro, Calili, assignors to Herman Miller, Inc., Zeeland, Mich, a corporation of Michigan Filed Aug. 38, 1962, Ser. No. 220,439 3 Claims. (Cl. 28721) This invention relates to an adjustable foot piece. More particularly, this invention relates to an angularly adjustable base structure adapted to be secured to a supporting surface such that the element the base supports is supported in a level position regardless of whether or not the supporting surface is level.

Various types of base structures have been devised which include adjustable means for maintaining a chair and the like in a horizontal position. However, such structures presently in existence have many inherent disadvantages. First of all, if the apparatus is to be truly effective, it is mandatory that the adjustable base be such that the element it supports can be leveled in all directions. Further, it is necessary that the structure be simple and easily operated to perform its desired function. Such a base structure must also be positive in its operation and should not detract from the appearance of the overall unit with which it is combined. No adjustable base structures are presently in existence which exhibit all of these features. v

It is therefore an object of this invention to prov de an improved base structure for a chair and the like which may be adjusted to assure that the element 1t supports is maintained in a level position.

' Another object of this invention is the provlslon of such a base structure which allows such adjustment 1n all directions.

A further object of this invention is the provision of such a base structure which includes a minimum number of component parts, thereby being simple to fabricate and to operate. i

A further object of this invention is the provision of such a base structure which does not detract from the unit into which it is incorporated.

These and other objects of this invention will become obvious to those skilled in the base structure art upon reading the following specification in conjunction with the accompanying drawings, wherein:

FIG. 1 is a side view of an embodiment of the base structure comprising this invention;

FIG. 2 is an exploded, perspective view of the component parts of the base structure shown in FIG. 1;

FIG. 3 is a cross-sectional view taken along the plane IIIIII of FIG. 1;

FIG. 4 is a cross-sectional view similar to FIG. 3, except that the base structure is mounted on a nonhorizontal supporting surface;

FIG. 5 is a side View of an alternative embodiment of a base structure comprising this structure;

FIG. 6 is an exploded, perspective view of the component parts of the base structure shown in FIG. 5;

FIG. 7 is a cross-sectional View taken along the plane VI-VI of FIG. 5; and

FIG. 8 is a cross-sectional view similar to FIG. 7, except that the base structure is mounted on a nonhorizontal supporting surface.

Briefly, this invention relates to an angularly adjustable base structure adapted to be secured to a supporting surface which includes a seat element having an arcuate upper surface and a leg mounting bearing member having arcuate upper and lower surfaces. The lower surface of the bearing member is slidably seated on the upper surface of the seat element. A cover plate is provided 3,206,235 Patented Sept. 14, 1965 for the seat element and the bearing member having an arcuate lower inner surface seating against the upper surface of the bearing member and slidably rockable thereabout. The cover plate and the seat element include means for reception of fastener elements for securing the cover plate to the seat element, locking the bearing member therebetween, these means in the cover plate and the seat element positioned beyond the periphery of the bearing member.

Referring more specifically to the drawing, the reference numeral 1 designates one embodiment of an angularly adjustable base structure made in accordance with this invention (FIGS. 1-4). The base 1 includes a seat element 5, a leg mounting bearing member 10, a leg 15 and a cover plate 20 (FIG. 2).

In this embodiment, the seat element 5 comprises an annulus, having a fiat bottom 6 and a concave upper surface 7 (FIGS. 2 and 3). The leg mounting bearing member 10 is circular and includes a spherical convex upper surface 11 and a spherical convex lower surface 12. Further, an opening 13 extends therethrough. The opening 13 is of a size receiving the leg 15, the leg 15 being suitably securely mounted therein.

The cover plate 20 includes an opening 21 for reception of the leg 15. The diameter of the opening 21 is larger than that of the leg 15 to permit movement of the leg within the opening, which will be more fully explained hereinafter. The bottom 22 of the cover plate is concave in shape to conform to the upper surface 11 of the leg mounting bearing member 10. A plurality of openings 23 are provided in the'cover plate generally adjacent its edges. A flange 24 extends downwardly from the edge of the cover plate.

Assembly and operation The base 1 is assembled as follows. The seat member 5 is positioned on a supporting surface, such as a floor 2, at the spot where the article to be supported, such as a chair, is to be positioned (FIGS. 1 and 3). Next, the leg mounting bearing member 10 is positioned upon the seat element 5, the leg 15 being securely mounted within the opening 13 of the bearing member 10. The lower surface 12 of the bearing member 10 engages the upper surface 7 of the seat element 5, and it will be noted that sliding, relative movement is possible. If the supporting surface 2 is level as shown in FIGS. 1 and 3, the bearing member 10 is centered on the seat element 5. However, if the supporting surface 2 is not level as shown in FIG. 4, the bearing member 1b is positioned on the seat element 5 such that the leg 15 is perpendicular to the horizontal, even though the supporting surface is not horizontal. It will thus be noted that adjustment of the hearing member and the seating element through relative movement enables one to position the leg 15 perpendicular to the horizontal even if the supporting surface is not horizontal.

Next, the cover plate 20 is positioned over the leg mounting bearing member 10, the leg 15 extending through the opening 21 in the cover plate. Since the opening 21 is larger than the diameter of the leg 15, it will be seen from FIGS. 3 and 4 that the concave bottom 22 fits snugly against the upper convex surface 11 of the bearing member 10 regardless of the positioning of the bearing member 10 with respect to the seat element 5. Attachment bolts 25 are then inserted through the openings 23 in the cover plate and suitably secured into the supporting surface 2. By drawing the attachment bolts 25 tightly against the cover plate 20, the bearing member 10, and thus the leg 15, is securely and positively locked between the cover plate 20 and the seat element 5. It should be specifically noted that the flange 24 of the cover plate 20 is preferably spaced a short distance from the supporting surface 2 so as to allow for proper adjustment. The article to be supported (not shown), such as a chair, is then attached to a means, such as the threaded element 16, provided on the leg 15.

It will be noted that this invention has provided an angularly adjustable base structure adapted to be secured to a supporting surface, the base structure being able to support an element in horizontal position even though the supporting surface is not horizontal. Adjustment is possible about the axis of the leg through 360 degrees. The structure is simple, the base being easily fabricated and quickly and simply assembled and adjusted for use. The same simplicity may be retained in appearance, thus the adjustable structure does not detract from the appearance of the unit with which it is associated.

Modification Referring to FIGS. 58, the reference numeral 50 designates another embodiment of an angularly adjustable base structure made in accordance with this invention. The base 50 includes a seat element 55, a leg mounting bearing member 60, a leg 65, a cover plate 70 and a cover member 90.

In this embodiment, the seat element 55 comprises a circular, dome-shaped element having a convex upper surface 56 with a flange 57 around its periphery, openings 58 being provided in the flange (FIGS. 6 and 7). Additional threaded openings 59 are provided in the dome-shaped portion generally adjacent the flange 57, the purpose of which will be explained hereinafter. The leg mounting bearing member 60 is circular and includes a spherical convex upper surface 61 and a spherical concave lower surface 62. The leg 65 extends upwardly from the upper surface 61.

The cover plate 70 includes an opening 71 for reception of the leg 65. The diameter of the opening 71 is larger than that of the leg 65 to permit movement of the leg within the opening, in the same manner as explained hereinbefore. The bottom 72 of the cover plate is spherically concave in shape to conform to the upper surface 61 of the leg mounting bearing member 60. The diameter of the cover plate 70 is larger than that of the leg mounting bearing member 60, and a plurality of openings 73 are provided in the cover plate generally adjacent its edges.

The cover member 90 is of a size suflicient to envelop the cover plate, the leg mounting bearing member and the seat element. It includes an opening 91 at the top thereof of a diameter larger than that of the leg 65, permitting movement of the leg 65 therein. A collar 92 is provided at this opening, having a set screw mechanism 93 therein for positioning and holding the cover member with respect to the leg as will now be explained.

It will be seen that the base 50 is assembled in the same manner as the base 1 described hereinbefore. The seat member 55 is positioned on a supporting surface, such as a floor 2, at the spot where the article to be supported, such as a chair, is to be positioned (FIGS. 5 and 7). Attachment bolts 51 extend through openings 58 in flange 57, thus rigidly secure the seat element 55 to the supporting surface 2. Next, the leg mounting bearing member 60 is positioned upon the seat element 55, the leg 65 extending upwardly from the bearing member 60. The lower surface 62 of the bearing member 60 engages the upper surface 56 of the seat element 55 and it will be noted that sliding, relative movement is possible. If the supporting surface 2 is level as shown in FIGS. 5 and 7, the bearing member 60 is centered on the dome-shaped seat element 55. However, if the supporting surface 2 is not level as shown in FIG. 8, the bearing member 60 is positioned on the seat element 55 such that the leg 65 is perpendicular to the horizontal, even though the supporting surface is not horizontal. It will thus be noted that once again, angular adjustment 4 of the bearing member and the seating element through relative movement enables one to position the leg 65 perpendicular to the horizontal even though the supporting surface is not horizontal.

Next, the cover plate 70 is positioned over the leg mounting bearing member 60, the leg 65 extending through the opening 71 in the cover plate. Since the opening 71 is larger than the diameter of the leg 65, it will be seen from FIGS. 7 and 8 that the concave bottom 72 fits snugly against the convex surface 61 of the bearing member 60 regardless of the positioning of the bearing member 60 with respect to the seat element 55. Attachment bolts 75 are then inserted through the openings 73 in the cover plate and screw into the threaded Openings 59 in the dome-shaped surface 56 of the seat element 55. This rigidly secures the seat element 55 to the cover plate 70, rigidly locking the leg mounting bearing member 60 therebetween. The cover member is then inserted over the leg 65, and the set screw 93 extending through the collar 92 rigidly secures the cover member to the leg.

It will be seen that the base structure 50 achieves all of the results and advantages noted hereinbefore, and in addition is comprised of parts capable of being stamped in production, thus making it a more competitive article of manufacture.

While only two embodiments of the invention have been shown and described, it may be possible to practice the invention through the utilization of certain other embodiments without departing from the spirit and scope thereof. Such other embodiments are to be considered a part of this invention unless the following claims specifically state otherwise.

We claim:

1. An angularly adjustable base structure adapted to be secured to a supporting surface comprising: a seat element having a concave upper surface; a bearing member having convex upper and lower surfaces, said lower surface of said bearing member slidably seating on said upper surface of said seat element; a leg secured to said bearing member; a cover plate for said seat element and bearing member having a concave lower inner surface seating against said upper surface of said bearing member and slidably rockable thereabout; said cover plate having a central clearance opening about said leg to permit its eccentric movement with respect to said leg; the peripheral portions of said cover plate extending downwardly to enclose said seat element and bearing member, said pe ripheral portions, when said cover plate is seated on'said bearing member, being spaced from said supporting surface; fastener elements for securing said cover plate to said floor and forcing said cover plate against said bearing member and said bearing member against said seat element for locking them against movement with respect to each other.

2. An angularly adjustable base structure adapted to be secured to a supporting surface as defined in claim 1 wherein said seat element is an annulus.

3. An angularly adjustable base structure adapted to be secured to a supporting surface as defined in claim 1 wherein said seat element and said bearing member are circular and said seat element is an annulus.

References Cited by the Examiner UNITED STATES PATENTS 153,813 8/74 Dewey 28712 211,471 1/79 Hurley 287-21 259,957 6/82 White 28721 366,790 7/87 Orther 287-21 1,407,118 2/22 Bennett 287-21 X 1,796,106 3/31 Johnson 287-87 2,262,064 11/41 Swarr 1642 CARL W. TOMLIN, Primary Examiner.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US153813 *Jun 16, 1874Aug 4, 1874 Improvement in umbrella-holders for vehicles
US211471 *Apr 10, 1878Jan 21, 1879 Improvement in piston-rod adjusters for oil-wells
US259957 *May 6, 1882Jun 20, 1882 Ball-and-socket joint
US366790 *Dec 6, 1886Jul 19, 1887Charles OrtherBrush
US1407118 *Oct 5, 1921Feb 21, 1922Herbert Bennett WilliamAutomobile-top fastener
US1796106 *Oct 29, 1927Mar 10, 1931Frank C WebbTransmission-case cover
US2262064 *Nov 16, 1939Nov 11, 1941Armstrong Cork CoFurniture glide and method of making same
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4446580 *Jun 9, 1981May 8, 1984Keiai Orthopedic Appliance Co., Ltd.Prosthetic foot structure
US4969911 *Dec 19, 1989Nov 13, 1990United States Manufacturing CompanyAdjustable prosthetic joint with alignment means
US5013325 *May 12, 1987May 7, 1991Gustav RennerfeltArtificial leg
US5139524 *Jan 18, 1990Aug 18, 1992Prosthetics Research StudyProsthetic alignment device supplementally secured by a hoop stress
US5425782 *Jan 18, 1994Jun 20, 1995Phillips; Van L.Alignment fixture for prosthetic device
US5452880 *Aug 19, 1993Sep 26, 1995Bailey; WilliamFence coupling
US5458657 *Sep 16, 1993Oct 17, 1995Becker Orthopedic Appliance CompanyEndoskeletal prosthesis having adjustable coupling
US5514185 *Jan 21, 1994May 7, 1996Phillips; Van L.Split foot prosthesis
US5514186 *Mar 8, 1994May 7, 1996Phillips; Van L.Attachment construction for prosthesis
US5545230 *Oct 11, 1994Aug 13, 1996Ohio Willow Wood CompanyProsthesis mounting adapter and method
US5545231 *Oct 11, 1994Aug 13, 1996Model & Instrument Development CorporationAngular adjustment system for pylon/prosthetic foot interface
US5549714 *Jan 12, 1995Aug 27, 1996Phillips; Van L.Symes foot prosthesis
US5728176 *Oct 30, 1995Mar 17, 1998Flex-Foot, Inc.Attachment construction for prosthesis
US6228124Sep 8, 1998May 8, 2001Prosthetic Design, Inc.Prosthetic foot with lateral and angular adjustability
US6527811Dec 16, 1997Mar 4, 2003Van L. PhillipsFoot prosthesis with modular foot plate
US6966933 *Oct 21, 2003Nov 22, 2005Roland J. Christensen, As Operating Manager Of Rjc Development, Lc, General Partner Of The Roland J. Christensen Family Limited PartnershipProsthetic foot with an adjustable ankle and method
US7341603Apr 4, 2005Mar 11, 2008Applied Composite Technology, Inc.Prosthetic foot with energy transfer including variable orifice
US7462201Oct 20, 2004Dec 9, 2008Freedom Innovations, LlcProsthetic foot with an adjustable ankle and method
US7520904Oct 19, 2005Apr 21, 2009Freedom Innovations, LlcProsthetic foot with an adjustable ankle and method
US7572299Mar 15, 2006Aug 11, 2009Freedom Innovations, LlcProsthetic foot with energy transfer
US7610655 *Feb 10, 2006Nov 3, 2009Thaw Richard EFurniture glide cover
US7618464Aug 3, 2006Nov 17, 2009Freedom Innovations, LlcProsthetic foot with variable medial/lateral stiffness
US7686848Jan 4, 2008Mar 30, 2010Freedom Innovations, LlcProsthetic foot with energy transfer
US7727285Jan 22, 2008Jun 1, 2010Freedom Innovations, LlcProsthetic foot with variable medial/lateral stiffness
US7794506Sep 16, 2008Sep 14, 2010Freedom Innovations, LlcMulti-axial prosthetic ankle
US7824446Dec 5, 2007Nov 2, 2010Freedom Innovations, LlcProsthetic foot with longer upper forefoot and shorter lower forefoot
US8034121Apr 17, 2009Oct 11, 2011Freedom Innovations, LlcProsthetic foot with two leaf-springs joined at heel and toe
US8500825Jun 29, 2010Aug 6, 2013Freedom Innovations, LlcProsthetic foot with floating forefoot keel
EP1655111A1 *Oct 21, 2005May 10, 2006Metal Inventions Holland B.V.Manure shovel with rotating handle holder
WO2005041819A2 *Oct 21, 2004May 12, 2005Applied Composite Technology IProsthetic foot with an adjustable ankle and method
Classifications
U.S. Classification403/90, 16/42.00R, 623/38, 343/882
International ClassificationA47B91/08
Cooperative ClassificationA47C7/002, A47B91/08
European ClassificationA47C7/00B, A47B91/08