US3353869A - Load supporting structures - Google Patents

Load supporting structures Download PDF

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Publication number
US3353869A
US3353869A US528671A US52867165A US3353869A US 3353869 A US3353869 A US 3353869A US 528671 A US528671 A US 528671A US 52867165 A US52867165 A US 52867165A US 3353869 A US3353869 A US 3353869A
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US
United States
Prior art keywords
finger
members
load supporting
load
seat
Prior art date
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
Application number
US528671A
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English (en)
Inventor
Edward T Getz
Pacak Matthew
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eaton Corp
Original Assignee
Eaton Yale and Towne Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Eaton Yale and Towne Inc filed Critical Eaton Yale and Towne Inc
Priority to US528671A priority Critical patent/US3353869A/en
Priority claimed from US525037A external-priority patent/US3329466A/en
Priority to SE09928/66A priority patent/SE328198B/xx
Priority to FR72693A priority patent/FR1504554A/fr
Priority to DE1529502A priority patent/DE1529502C3/de
Priority to GB36268/66A priority patent/GB1156528A/en
Priority to US698075A priority patent/US3557264A/en
Application granted granted Critical
Publication of US3353869A publication Critical patent/US3353869A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/04—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C5/00—Chairs of special materials
    • A47C5/12—Chairs of special materials of plastics, with or without reinforcement
    • A47C5/125—Chairs of special materials of plastics, with or without reinforcement completely made of foam material
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/02—Seat parts
    • A47C7/024—Seat parts with double seats
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/02—Seat parts
    • A47C7/18—Seat parts having foamed material included in cushioning part
    • A47C7/20—Seat parts having foamed material included in cushioning part with reinforcement in the foam layer
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/02—Seat parts
    • A47C7/28—Seat parts with tensioned springs, e.g. of flat type
    • A47C7/282—Seat parts with tensioned springs, e.g. of flat type with mesh-like supports, e.g. elastomeric membranes
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Supports for the head or the back
    • A47C7/40—Supports for the head or the back for the back
    • A47C7/405—Supports for the head or the back for the back with double backrests
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
    • B29C44/1266—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements the preformed part being completely encapsulated, e.g. for packaging purposes or as reinforcement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/68—Seat frames
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/68—Seat frames
    • B60N2/686—Panel like structures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/70—Upholstery springs ; Upholstery
    • B60N2/7017—Upholstery springs ; Upholstery characterised by the manufacturing process; manufacturing upholstery or upholstery springs not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/70—Upholstery springs ; Upholstery
    • B60N2/7023—Coach-like constructions
    • B60N2/7035—Cushions
    • B60N2/7047—Springs
    • B60N2/707—Springs with rubber blocks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/12—Moulds or cores; Details thereof or accessories therefor with incorporated means for positioning inserts, e.g. labels
    • B29C33/123—Moulds or cores; Details thereof or accessories therefor with incorporated means for positioning inserts, e.g. labels for centering the inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/58—Upholstery or cushions, e.g. vehicle upholstery or interior padding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/771—Seats

Definitions

  • This invention relates to a seat construction adaptable for use in vehicle seats, furniture, etc., or other load supporting devices of this general type. More specifically, this invention is directed to a new and novel combination of supporting members, flexible load supporting and transferring structure and resilient material to provide a novel cooperation of these elements in their combined form to result in a new and improved seat construction.
  • cushion or seat constructions used as load supporting members of this general type do not take maximum advantage of the combination of a supporting frame and resilient material making up such cushion or seat.
  • Such devices for example, contain flexible members embedded in the resilient material such as foam, the flexible members being attached to the frame which is adapted to be carried, for example, in the case of furniture on the furniture legs or in the case of vehicle seats on the brace and sub-frame members protruding from the floor of the vehicle;
  • the foam material does not surround the frame and does not fully cooperate with the under or lower surfaces of the flexible members to provide the greatest utility to the combination of the elements making up the seat construction. 1
  • An additional object of the present invention is the provision of a new and improved load supporting structure which comprises a frame having load supporting and transferring structure mounted thereon surrounded by a first pad of elastomeric material having predetermined physical properties, and a preformed pad of elastomeric material having different physical properties molded into a major portion of a face of said first mentioned pad.
  • Yet another object of this invention is provision of a load supporting structure as noted in the next preceding paragraph wherein the inner face between the first and second pads is of denser, tougher consistency than either 5 of said pads to provide a reinforced seat structure with a relatively soft outer surface.
  • a further object of this invention is to provide a load supporting structure having a frame, load supporting and transferring structure carried on the frame, elastomeric material of a predetermined density bonded to at least one side of the load supporting and transferring structure, and a preformed pad of elastomeric material of a lesser density mounted into one face of the load supporting structure to provide a reinforced seat structure with a relatively soft outer surface.
  • FIGURE 1 is a perspective view of a so-called bucket type seat for use in vehicles illustrative of one possible application of the cushion construction of this invention.
  • FIGURE 2 is a perspective view of the illustrative application of the seatconstruction of this invention disclosed in FIGURE 1 with the seat being shown in a partially completed or unupholstered form.
  • FIGURE :3 is a perspective view of one form of the flexible load supporting and transferring structure attached to supporting members.
  • FIGURE 4 is a. perspective view of the form of supporting members, illustrated in FIGURE 3.
  • FIGURE 5 is a perspective view of the seat construction of'FIGURE 2, certain portions being broken away to illustrate the relationship of the supporting members, flexible load supporting and transferring structure and 40 resilient material.
  • FIGURE 6 is a sectional view of a portion of the seat construction illustrated in FIGURES 2 and 5 as taken along line 6-6 in FIGURE 5.
  • FIGURE 7 is a partial top plan view of a bench type seat illustrating another application of the novel seat construction ofthis invention, with the resilient material above the finger set removed.
  • FIGURE 8 is a sectional view similar to FIGURE 6 disclosing a modification of the manner of attaching the upper portion of the resilient material to the lower portion of the resilient material of the seat construction.
  • FIGURE 9 illustrates a modified form of the flexible load supporting and transferring structure.
  • FIGURE 10 is a sectional view of the seat construction similar to FIGURE 6, but disclosing in section the modification of the flexible load supporting and transferring apparatus illustrated in FIGURE 9 with the flexible load supporting and transferring apparatus being surrounded by foamed elastomeric material.
  • FIGURE 11 is a plan view of portions of the load supporting and transfer means showing a modified form of connecting means resiliently attaching the unsupported portions.
  • FIGURES 12-14 represent successive steps in the proc- 5 ess for making the foam cushion unit of FIGURE 15 according to the present invention.
  • FIGURE 1 discloses an illustration of one application for the new and novel seat construction of this invention.
  • This particular application is a bucket type eat for use in vehicles.
  • Other applications of the seat construction of this invention will become apparent hereinafter, for example, in the environment of the base or back portion of a bench type seat as illustrated by- FIGURE 7.
  • the seat construction shown in FIGURE 1 at 1 comprises a base portion 2 and a back portion 3 for supporting the buttocks and back of the vehicle passenger.
  • this seat construction is only illustrative of the varied and numerous applications of the novel seat construction of this invention, as will become apparent hereinafter.
  • FIGURE 2 discloses the seat construction of FIGURE 1 with the upholstery or outer cover removed to illustrate that the supporting members and flexible load supporting and transferring structure are surrounded by the resilient material of the cushion construction to provide maximum utility to the combination of these members, as will become apparent hereinafter.
  • FIGURE 2 as well as FIGURE 1 also illustrates a hinged connection 4 between the base portion 2 and back portion 3 so that the back portion can be pivoted forward to provide accessibility to the rear passenger area of the vehicle a is well-known.
  • FIGURES 3 and 4 there is illustrated one form of the supporting members and flexible load supporting and transferring structure of the cushion construction of this invention.
  • the supporting members 5 of this seat construction comprise base support members 6 and upwardly extending back support members 7 hinged through a connection 8, similar to the hinge connection 4. It is evident that the hinged connection 8 can be eliminated and the connection between base portion 2 and back portion 3 made rigid for the production of a non-fold seat as used in a 4-door sedan.
  • the support members 6 for the seat construction comprises a semi-curved front rail 9 and an opposed substantially, straight rear rail 10.
  • Straight side rail 11 and 12 join the respective ends of the front and rear rails 9 and 10 to produce a generally open square frame.
  • the front rail 9, rear rail 10 and side rails 11 and 12 are made of angle iron with one leg vertically disposed to provide a lip 13 for attachment of finger sets 22, 23 and 36 as will become apparent hereinafter.
  • Feet members 14 are provided at the corners of the support members 6 so that the entire construction can be attached to a suitable pair of guide rail in the automobile on which seats are customarily mounted to provide for adjustment on the seat relative to the steering wheel to accommodate drivers of differing size as is well-known.
  • Upstanding stop lugs 15 are provided near the ends of the rear rail 10. These abut the bottom rail 16 of the hinged back supporting member 7 and aid in providing proper orientation for that unit.
  • the back supporting member 7 comprises a bottom rail 16 and an opposed top rail 17 secured together by opposed side rails 18, the top rail being of lesser span or length than the bottom rail.
  • Side rails 18 converge from the ends of the bottom rail 16 inwardly and upwardly to the ends of the top rail 17 to provide the contoured, upwardly tapered back supporting member 7.
  • the back supporting member 7 is suitably made from a single piece of strap iron bent to produce the rails enumerated, with the terminal ends joined together to produce an endless unit.
  • the strap hinges 8 have their upper ends riveted or the like as at 19 to the lower portions of the side rails 18.
  • the lower portions of the strap hinges 8 bend forwardly in an arc and carry pins 20.
  • the pins 20 fit into tubular sockets 21 fastened to the rear portions of the side rails 18 of the base support members 6.
  • the back frame is thereby adapted to be folded forward as in a two-door auto application.
  • Each flexible load supporting and transferring structure illustrated in FIGURES 3 and 5 comprises a plurality of flat members having a common base portion secured, attached or otherwise carried in cantilevered relationship on the rail members making up the base supporting members or the back support members.
  • These flexible load supporting and transferring members illustrated comprise a plurality of elongated finger-like elements 29, or finger sets which extend or project into the area of greatest load.
  • the area of greatest load in the base portion 2 is located between the rear rail member 10 and the transverse centerline of the seat.
  • the area of greatest load is located between the rail 16 and the transverse centerline of the back portion 3.
  • the left hand set 22 comprises a common base member 24 from which five fingers 25 extend in parallel, spaced relation.
  • the fingers 25 in this actual embodiment of the invention are about 1" wide and spaced about 1" apart.
  • the finger set including fingers 25 and the common base member 24 is folded over in a U-section and hooked over the side rail 12 to prevent movement of the finger sets toward the center of the seat upon application of a load to the seat.
  • the main portion of the fingers 25 are oflset from the plane of the rails or frame in a direction away from the top surface of the seat.
  • the major portion of each finger lays in a plane offset downwardly from the upper edge of the frame.
  • the offset arrangement of the fingers prevents or alleviates fatigue failures of the fingers at the edge of the rails and the detrimental formation of a permanent set in the fingers and the foam rubber above the fingers upon cyclic loading of the unit.
  • the right hand set 23 Opposite the left hand fingers set 22 is the right hand set 23.
  • the right and left hand sets 23 and 22 are similar in structural configuration.
  • the right hand set 23 is attached to the right hand rail 11 by the folded over U-section common base member 28.
  • the inner ends of the fingers 25 on both finger sets are hook-shaped as at 26 and are positioned in opposed relation for receiving rubber bands 27.
  • the rear rail 10 of support members 6 also carries a finger set 36.
  • This finger set is similar to finger sets 22 and 23 in that it contains a base portion 37 snapped on to rail 10 and carrying a plurality of finger-like elements 38 extending into the medial area of the seat. At least one of the finger elements 38 is turned over in its end area for receipt of a rubber band 27 carried by fingers on the finger sets 22 and 23.
  • Attached to the back supporting members 7 are a plurality of flexible load supporting and transferring apparatus or members taking the form of finger sets similar in construction to finger sets 22 and 23.
  • a finger set 30 is secured, attached or otherwise carried on the top rail 17 of the back supporting members 7.
  • Thi finger set comprises a base member 31 attached to rail 17 by a folded over, U-section and carries finger-like elements 32.
  • a finger set 33 is attached to bottom rail 16 of the support member 7 and is attached thereto by a folded over, U-section.
  • the base portion 34 of finger set 33 carries a plurality of finger-like elements 35.
  • FIGURE 5 of the drawings illustrates the relationship of the above described support members and flexible load supporting and transferring apparatus and resilient material making up the overall combination of the cushion construction.
  • FIGURE 6 also illustrates such combination and association and as shown, discloses support members 9 and 10 as well as finger set 36 mounted on sup port member 10.
  • the finger-like elements 38 extend or protrude into the medial area of the cushion.
  • the resilient material 40 is a foam rubber preferably polyurethane foam, or other similar elastomeric or rubher-like foamed material bonded or secured to at least the underside or bottom surface of the finger sets and is bonded or secured to support members 9 and 10.
  • the foamed material 40 completely surrounds the support members 9 and 10.
  • the resilient material 40 extends between such support members, and the resilient material functions in cooperation with the support members as an independent supporting means within the cushion construction.
  • the resilient material as mentioned preferably surrounds and is bonded to the support members 9 and 10 in their entirety and extends therebetween, so upon application of loads of the type in the vehicle seat environment, the resilient material will remain fast to the support members and transfer such load to the support members.
  • the resilient material is adhered or bonded to at least the lower surface or underside of the finger-like elements and the entire finger set.
  • By bonding or adhering the resilient material to the lower surface area of the finger set such material beneath the fingers is placed in tension upon an application of a load to the cushion structure.
  • full advantage is taken of the cooperation between the finger set and the resilient material since any loads applied to the cushion substantially normal to the cushion surface are transferred laterally throughout the resilient material which is bonded to the underside of the finger-like elements.
  • a considerable depth of resilient material is provided below the finger-like elements as shown in FIGURE 6.
  • FIGURE 6 illustrates still a different means of attaching the upper portion 41 of the resilient material to the lower portion 40 of the resilient material as by a mechanical locking through the provision of interlocking groove 42 and rib 44 in the lower and upper resilient materials, respectively, making up the cushion.
  • finger-like elements as the flexible load supporting and transferring apparatus in this environment, as Well as any similar elongated member, presents an advantage in that such can be configured to place a major portion thereof in the area of greatest load application so that maximum advantage is taken of the cooperation between the resilient material bonded to the under surface or bottom side of such members and the members themselves.
  • finger-like elements as illustrated in FIG- URES 3 and 5 may be of different lengths, widths or overall structural configuration to take maximum advantage of the cooperation between the resilient material underneath the finger-like members and the members themselves.
  • FIGURE 7 illustrates another application of the type of flexible load supporting and transferring structure of this invention, namely, a plurality of finger-like members extending from the rear rail of a bench type seat as would be used for example in the rear passenger area of a vehicle.
  • the rear rail carries a finger set 36' hooked over the rail in a manner similar to that illustrated in FIGURE 3.
  • the finger set 36' has integral finger-like elements 38' extending into the medial area of the seat and adjacent front rail 9.
  • the finger-like elements 38' of this illustrated embodiment of the invention are of greater length to provide additional support in cooperation with the layer of foamed elastomeric material 40' disposed below the finger-like elements.
  • the foamed elastomeric material is adhered or bonded to the entire finger set, in the same manner as the finger sets illustrated in FIGURE 3. Also, the foamed elastomeric material surrounds the rear and front rail members in the same fashion as described in reference to FIGURE 3.
  • the flexible load supporting and transferring structure as illustrated in FIGURE 7 can comprise a plurality of finger sets each containing finger-like elements protruding from only a single support member and could be applied to the back portion of a seat having an elongated frame as in the rear seat of a vehicle.
  • the upper portion of the resilient material making up the seat construction of FIGURE 7 could be disposed in the manner referred to in regard to FIGURES 6 and 8.
  • additional elements may be included as part of the flexible load supporting and transferring apparatus of the cushion construction such being illustrated in FIG- URES 3 and 5 as rubber bands 27 attaching adjacent finger-like members together in the areas of the cushion receiving the greatest load.
  • rubber bands 27 attaching adjacent finger-like members together in the areas of the cushion receiving the greatest load.
  • FIGURE 11 shows another structural arrangement of the load supporting and transfer means in the form of finger sets 50 having notches 51 in their lateral edges for receiving the rubber bands 52.
  • the surfaces of the rubber bands 52 and the fingers 50 are parallel to the plane of the loading surface of the seat unit.
  • the rubber bands 50 maintain the finger sets in the same plane within the seat unit which, it has been found, promotes even distribution of any load upon the seat unit throughout the finger sets through the frame means.
  • the notches 51 may be of any desired shape or configuration. Provision of notches in the lateral edges of the finger sets has been found to be advantageous in the making of relatively thin seats.
  • the fiat, notched fingers and fiat bands 52 do not present protrusions in the foam and provide a softer feel when sitting on the seat.
  • the flat, notched fingers of FIGURE 11 are more economical and easier to manufacture than the turned-over end fingers as shown in FIG- URE 3 as the fabrication step of turning the end of the finger over is not necessary. It has also been found that it; is easier to foam around a flat, notched finger than a turned-over end in making the seat unit.
  • FIGURE 9 and 10 also illustrate additional flexible load supporting and transferring apparatus in a cushion construction of this invention, specifically a sheet of rubber-like material 46 disposed abovethe finger sets.
  • a sheet of rubber-like material 46 disposed abovethe finger sets.
  • Such flexible sheet of resilient material is disposed substantially in the medial area of the seat and extends throughout its greatest width toward opposed right and left rails 9 and 10 adjacent rear rail 10 so as to provide additional support in the medial to rear area of the cushion as required for application to the vehicle environment.
  • the sheet 46 is also perforated so that additional gripping or securement is provided between the sheet and resilient material.
  • Such can also be relieved or provided with spaced portions in the area of greatest load to provide a comfort zone within the cushion of seat which would be cQmPletely resilient material or more flexible types of load supporting and transferring apparatus.
  • FIGURE 3 One form of this arrangement is illustrated in FIGURE 3, wherein the end portions of finger set 36 is spaced from finger sets 22 and 23 in the area of the cushion of greatest load application.
  • a seat construction which includes a pad 60 of relatively soft, open-celled polyurethane foam which is supported by and bonded to a second pad 61 of a relatively denser polyurethane foam.
  • the pad 60 is preferably cut from a selected polyurethane slab stock and subsequently molded to the base of the pad 61 to form a unitary and completed seat construction.
  • the hardness of the composite seat may be varied by a variation of the thickness of the pad 60 relative to the thickness of the base pad 61 or in varying the relative densities or the physical characteristics of the respective pads.
  • the prefoamed pad 60 may range in thickness from A" to 1" but it has been found that a A" thickness is preferably. While molding the pad 60 to the base of the pad 61, the Wet foam forming the pad 61 impregnates the slab 60 and creates a layer at the interface 63 between the pads 60 and 61 which is denser and tougher than either pad 60 or 61. Also, the use of the prefoamed pad 60 ensures a smooth, soft surface of the seat because without the pad 60 the air within the mold and gases formed during the foaming of the polyurethane are trapped and cause voids or pockets to be formed in the outer surface of the seat.
  • mold 65 and mold cover 66 are shown in cross-section.
  • the frame 5, with its load supporting and transfer means 25, is supported during the molding operation in spaced relationship preferably from the mold cover 66, by any suitable means 64 such as screws, bolts, magnetized pins or the like.
  • the prefoamed pad 60 is shown in FIGURE 13 as placed between the suspended frame and the mold cover 66. With the. frame supported in place and the prefoamed pad 60 placed on the frame, the polyurethane foam mixture is poured in a liquid state into the mold in a conventional manner in an amount sufficient to cover the bottom surface of the mold.
  • the mold is then closed by placing the lid 66 on the mold and securing it in place and allowing the polyurethane foam mixture to react and rise, thereby filling the mold with foam.
  • the resulting foam carries the prefoamed pad 60 from its unsecured position upon the frame 5, shown in FIGURE 13, to the upper portion of the mold against the mold cover 66, as shown in FIGURE 14.
  • An alternative way of effecting placement of the prefoamed pad 60 in the upper surface of the seat unit would be to secure the preformed pad by pin means or other suitable means in place against the mold cover 66 before introduction of the polyurethane foam mixture into the mold.
  • this invention may be practiced not only with polyurethane foams such as polyether using the one-shot method but may also be used in conjunction with a polyether-urethane prepolymer.
  • the foamed mixture is cured and treated by a heating process in the usual manner.
  • Foam articles produced in this manner with the preformed pad at the upper area of the mold were found to be practically free of defects while foams made without the preformed pad possessed considerable irregularities and defects upon removal of the mold lid 66.
  • the resulting interface between the prefoamed pad 60 and the pad 61 is of denser, tougher consistency having a modulus of elongation substantially greater than either of the pads. This denser, tougher interface provides a reinforced seat structure with a relatively soft outer surface.
  • a load supporting structure comprising:
  • load supporting and transferring elements are finger type members having a base portion mounted on said frame means and a substantially fiat portion extending from said base portion.
  • said elastorneric material includes a separate elastorneric memher, said elastorneric member secured to said elastorneric material.
  • load supporting and transferring elements are substantially fiat sheet-like members mounted in cantilevered relationship on said frame means and extending into the medial area of said load supporting structure.
  • a seat construction comprising:
  • frame means including members for supporting resilient material
  • said frame means comprising a base portion and a back portion
  • said base portion comprising opposed side rail members and opposed front and rear rail members secured to said side rail members to form a box-shaped frame
  • said back portion comprising opposed side rails and opposed upper and lower rail members secured to said side rail members, said upper rail member being shorter than said lower rail member so that said back portion is inwardly contoured from the lower to upper rail members,
  • each finger set includes: an elongated base member having a U-shaped attaching means adapted to be hooked over a rail member, said base member extending substantially the entire extent of the length of said respective rail member,
  • finger members integral with each base member, said finger members being of greater transverse cross sectional width than transverse cross sectional height,
  • one of said fingers sets of said base portion being hooked over one side rail member and another one of said finger sets of said base portion being carried on the other opposed side rail member, the remaining finger set of said base portion being hooked over said rear rail member and extending toward said one and said other finger sets,
  • the finger sets on said back portion comprising two such finger sets, each of which includes: an elongated base member having an elongated U- shaped attaching means adapted to be hooked over a rail member, said base member extending substantially the entire extent of the length of said respective rail member, finger members integral with each base member, said finger members being of greater transverse cross sectional width than transverse cross sectional height,
  • said elastomeric material surrounding and enclosing said rail members of said base and back portions and being adhered to all of said finger sets.
  • Load supporting structure comprising:
  • load transfer means mounted on said frame means and disposed substantially in a plane normal to the direction of load on said load supporting structure, said load transfer means including a plurality of elements supported solely at one end to said frame means, said elements extending in laterally spaced relationship with one another, the other end of each of said elements terminating in laterally spaced relationship to each other, the other end of substantially all of said elements spaced a substantial distance from said frame means,
  • a load supporting structure comprising:
  • load transfer means mounted on said frame and extending from said frame into the medial area of said load supporting structure
  • said load supporting and transfer elements are contained within said elastomeric material and extend toward the medial area of the load supporting structure.
  • the structure includes base and back portions forming a seat.
  • a load supporting structure comprising:
  • frame means including members for supporting elastomeric material
  • finger-type load supporting and transferring elements mounted in cantilevered relationship on opposed frame support members extending toward one another into the medial area of the load supporting structure, said finger-type load supporting and transferring elements having a base portion mounted on one of said frame members and a substantially fiat portion extending from said base portion, the opposed finger-type load supporting and transferring elements being attached to each other through resil ient means, and
  • Load supporting structure comprising:
  • load transfer means mounted on said frame means and disposed substantially in a plane normal to the direction of load on said load supporting structure
  • said load transfer means including portions extending toward and terminating in spaced relation to one another in the same plane,
  • said portions each supported solely at one end to said frame on opposite sides of said frame,
  • load transferring elements are finger-type members having a base portion mounted on said frame means and said elements are provided with mounting means for resilient means extending therebetween so that the resilient means lie substantially in the same plane as and co-extensive with said load transfer means.
  • Load supporting structure comprising: frame means, at least two sets of load transfer means mounted on said frame means and disposed substantially in a plane normal to the direction of the load on said structure, said load transfer means sets each including a plurality of elements laterally spaced from each other and supported solely at one end at different portions of said frame means,
  • said elastomeric material and said load transfer means cooperatively transferring any load on said structure to said frame means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Mattresses And Other Support Structures For Chairs And Beds (AREA)
  • Seats For Vehicles (AREA)
  • Casting Devices For Molds (AREA)
US528671A 1965-08-12 1965-12-23 Load supporting structures Expired - Lifetime US3353869A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US528671A US3353869A (en) 1965-08-12 1965-12-23 Load supporting structures
SE09928/66A SE328198B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1965-08-12 1966-07-20
FR72693A FR1504554A (fr) 1965-08-12 1966-08-10 Perfectionnements aux structures porteuses et notamment aux sièges pour véhicules
DE1529502A DE1529502C3 (de) 1965-08-12 1966-08-11 Sitz mit einem Traggestell
GB36268/66A GB1156528A (en) 1965-08-12 1966-08-12 Seat Construction
US698075A US3557264A (en) 1965-08-12 1967-09-21 Load supporting structures

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US47906865A 1965-08-12 1965-08-12
US528671A US3353869A (en) 1965-08-12 1965-12-23 Load supporting structures
US525037A US3329466A (en) 1966-02-04 1966-02-04 Load supporting structures

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US3353869A true US3353869A (en) 1967-11-21

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US528671A Expired - Lifetime US3353869A (en) 1965-08-12 1965-12-23 Load supporting structures
US698075A Expired - Lifetime US3557264A (en) 1965-08-12 1967-09-21 Load supporting structures

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US698075A Expired - Lifetime US3557264A (en) 1965-08-12 1967-09-21 Load supporting structures

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DE (1) DE1529502C3 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR1504554A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1156528A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
SE (1) SE328198B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

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US6425153B1 (en) * 1998-01-21 2002-07-30 James B. Reswick Support cushion
US20030052525A1 (en) * 2000-02-28 2003-03-20 Invacare Corporation Multiply adjustable low back support assembly for a wheelchair
US20120241999A1 (en) * 2009-09-11 2012-09-27 Kroener Gregor Method for producing support structures in motor vehicles
JP2013252728A (ja) * 2012-06-05 2013-12-19 Toyota Boshoku Corp 車両用シートフレーム
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US20140183924A1 (en) * 2012-12-31 2014-07-03 Sava Cvek Upholstered Seat with Flexible Pelvic Support
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USD779250S1 (en) 2016-02-12 2017-02-21 Haworth, Inc. Portion of a back support for a chair
USD779254S1 (en) 2016-02-12 2017-02-21 Haworth, Inc. Armrests for a chair
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USD782859S1 (en) 2016-02-12 2017-04-04 Haworth, Inc. Back support for a chair
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US3529866A (en) * 1968-11-12 1970-09-22 Eaton Yale & Towne Support structure
US3610688A (en) * 1969-08-01 1971-10-05 Flex O Lators Encapsulated cushion and spring deck assembly for seating structures
US3819232A (en) * 1972-08-21 1974-06-25 Gen Motors Corp Vehicle seat construction
US4357005A (en) * 1980-12-08 1982-11-02 Lear Siegler, Inc. Support for seat pad
US5067772A (en) * 1990-03-29 1991-11-26 Michigan Seat Company Foam seat with insert
US5154485A (en) * 1990-05-11 1992-10-13 Fleishman Gregg R Spring plate furniture
US6425153B1 (en) * 1998-01-21 2002-07-30 James B. Reswick Support cushion
US20030052525A1 (en) * 2000-02-28 2003-03-20 Invacare Corporation Multiply adjustable low back support assembly for a wheelchair
US9409332B2 (en) * 2009-09-11 2016-08-09 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg Method for producing support structures in motor vehicles
US20120241999A1 (en) * 2009-09-11 2012-09-27 Kroener Gregor Method for producing support structures in motor vehicles
US20140152064A1 (en) * 2011-05-06 2014-06-05 Haworth, Inc. Item of seating furniture, in particular office chair
US9486081B2 (en) * 2011-05-06 2016-11-08 Haworth, Inc. Item of seating furniture, in particular office chair
US9826836B2 (en) 2011-06-08 2017-11-28 Haworth, Inc. Seat, in particular an office chair
US9504325B2 (en) 2011-06-08 2016-11-29 Haworth, Inc. Seat, in particular an office chair
US11076696B2 (en) 2011-06-08 2021-08-03 Haworth, Inc. Seat, in particular an office chair
US10638841B2 (en) 2011-06-08 2020-05-05 Haworth, Inc. Seat, in particular an office chair
US10111525B2 (en) 2011-06-08 2018-10-30 Haworth, Inc. Seat, in particular an office chair
JP2013252728A (ja) * 2012-06-05 2013-12-19 Toyota Boshoku Corp 車両用シートフレーム
US20140183924A1 (en) * 2012-12-31 2014-07-03 Sava Cvek Upholstered Seat with Flexible Pelvic Support
US9326613B2 (en) * 2012-12-31 2016-05-03 Sava Cvek Upholstered seat with flexible pelvic support
US9480339B2 (en) 2012-12-31 2016-11-01 Sava Cvek Seat with pelvic support
US9913539B2 (en) 2013-03-15 2018-03-13 Haworth, Inc. Office chair
US9560917B2 (en) 2014-11-26 2017-02-07 Steelcase Inc. Recline adjustment system for chair
US10575648B2 (en) 2015-04-13 2020-03-03 Steelcase Inc. Seating arrangement
US10021984B2 (en) 2015-04-13 2018-07-17 Steelcase Inc. Seating arrangement
US11963621B2 (en) 2015-04-13 2024-04-23 Steelcase Inc. Seating arrangement
US11553797B2 (en) 2015-04-13 2023-01-17 Steelcase Inc. Seating arrangement
US11324325B2 (en) 2015-04-13 2022-05-10 Steelcase Inc. Seating arrangement
US11259637B2 (en) 2015-04-13 2022-03-01 Steelcase Inc. Seating arrangement
US11096497B2 (en) 2015-04-13 2021-08-24 Steelcase Inc. Seating arrangement
US10194750B2 (en) 2015-04-13 2019-02-05 Steelcase Inc. Seating arrangement
USD785962S1 (en) * 2015-08-13 2017-05-09 Elite Manufacturing Corporation Chair
USD779250S1 (en) 2016-02-12 2017-02-21 Haworth, Inc. Portion of a back support for a chair
USD793787S1 (en) 2016-02-12 2017-08-08 Haworth, Inc. Portion of a back support for a chair
US10182657B2 (en) 2016-02-12 2019-01-22 Haworth, Inc. Back support for a chair
USD779253S1 (en) 2016-02-12 2017-02-21 Haworth, Inc. Back support for a chair
USD779252S1 (en) 2016-02-12 2017-02-21 Haworth, Inc. Back support for a chair
USD779255S1 (en) 2016-02-12 2017-02-21 Haworth, Inc. Headrest for a chair
US10729250B2 (en) 2016-02-12 2020-08-04 Haworth, Inc. Back support for a chair
USD782241S1 (en) 2016-02-12 2017-03-28 Haworth, Inc. Back support for a chair
USD779251S1 (en) 2016-02-12 2017-02-21 Haworth, Inc. Lumbar support for a chair
USD779254S1 (en) 2016-02-12 2017-02-21 Haworth, Inc. Armrests for a chair
USD779248S1 (en) 2016-02-12 2017-02-21 Haworth, Inc. Armrests for a chair
USD784749S1 (en) 2016-02-12 2017-04-25 Haworth, Inc. Lumbar support for a chair
USD782859S1 (en) 2016-02-12 2017-04-04 Haworth, Inc. Back support for a chair
US11805914B2 (en) 2016-02-12 2023-11-07 Haworth, Inc. Back support for a chair
US11825955B2 (en) 2017-06-09 2023-11-28 Steelcase Inc. Seating arrangement and method of construction
US10966527B2 (en) 2017-06-09 2021-04-06 Steelcase Inc. Seating arrangement and method of construction

Also Published As

Publication number Publication date
FR1504554A (fr) 1967-12-08
DE1529502A1 (de) 1971-10-21
DE1529502B2 (de) 1973-02-22
GB1156528A (en) 1969-06-25
DE1529502C3 (de) 1973-09-20
US3557264A (en) 1971-01-19
SE328198B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1970-09-07

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