US3487480A - Box spring assembly - Google Patents

Box spring assembly Download PDF

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Publication number
US3487480A
US3487480A US644358A US3487480DA US3487480A US 3487480 A US3487480 A US 3487480A US 644358 A US644358 A US 644358A US 3487480D A US3487480D A US 3487480DA US 3487480 A US3487480 A US 3487480A
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United States
Prior art keywords
spring
springs
torsion bar
spring assembly
frame
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Expired - Lifetime
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US644358A
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English (en)
Inventor
Walter V Slominski
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Hoover Group Inc
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Hoover Ball and Bearing Co
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Assigned to FIRST NATIONAL BANK OF BOSTON, THE reassignment FIRST NATIONAL BANK OF BOSTON, THE SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HOOVER GROUP, INC., A CORP. OF DE.
Assigned to HOOVER GROUP, INC. reassignment HOOVER GROUP, INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: HOOVER UNIVERSAL, INC.
Anticipated expiration legal-status Critical
Assigned to HOOVER GROUP, INC. reassignment HOOVER GROUP, INC. RELEASED BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). RELEASE OF SECURITY INTEREST RECORDED AT REEL 4492 FRAME 0790 DATED 12/02/85 Assignors: FIRST NATIONAL BANK OF BOSTON, THE
Expired - Lifetime legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C23/00—Spring mattresses with rigid frame or forming part of the bedstead, e.g. box springs; Divan bases; Slatted bed bases
    • A47C23/04—Spring mattresses with rigid frame or forming part of the bedstead, e.g. box springs; Divan bases; Slatted bed bases using springs in compression, e.g. coiled
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C23/00—Spring mattresses with rigid frame or forming part of the bedstead, e.g. box springs; Divan bases; Slatted bed bases
    • A47C23/30—Spring mattresses with rigid frame or forming part of the bedstead, e.g. box springs; Divan bases; Slatted bed bases using combinations of springs covered by more than one of the groups A47C23/04, A47C23/06 and A47C23/12; Frames therefor

Definitions

  • intermediate support springs extend between the frame and pairs of adjacent main spring load supporting portions for resiliently supporting intermediate portions of the main springs.
  • the mounting portions for all of the springs in the assembly are shaped so that with only a minor variation in the springs, a desired height for a particular spring assembly is achieved.
  • This invention relates to wire spring assemblies which are especially adapted for manufacturing box springs of the type normally used on beds, although the springs of this invention can be used in other environments.
  • the conventional box spring consists of a rectangular wooden frame on which a plurality of coil springs and border wires are mounted, and a fabric cover and pad are positioned over the springs and the border wires and attached to the frame.
  • Such a box spring is heavy, and unnecessarily expensive, because of the amount of wire used in the coil springs.
  • Box spring assemblies are marketed in different heights, the height being the distance between the frame and the plane of the load supporting deck of the assembly.
  • the reason box spring assemblies are marketed in different heights is because mattresses of different thicknesses are used on box springs, and the combined height of the box spring and thickness of the mattress must be uniform in order to achieve uniform bed height.
  • this necessity for making box spring assemblies of different heights required the manufacture of a standard box spring assembly of minimum height, and when one of greater height was desired this was accomplished by either adding additional Wood to the frame, or making a substantial change in the construction of the individual springs in the assembly.
  • the addition of wood to the frame is undesirable because it adds unnecessary weight to the assembly and this solution is becoming more and more expensive as lumber becomes more expensive.
  • a substantial change in the spring construction involves very high costs for changes in manufacturing machinery.
  • all of the main springs and the intermediate support springs are constructed so that they consist of a straight wire load supporting portion, which cooperate to form the spring assembly deck, and end mounting portions which are FE i i 7 Ce 3,487,480
  • the mounting portions in all of the springs are substantially identical, thereby facilitating manufacture of the springs.
  • the mounting portions are also constructed so that each includes a pair of parallel torsion bars which are vertically spaced and connected by a vertical leg disposed adjacent the spring assembly deck.
  • the length of this leg can be adjusted to thereby adjust the overall height of the resulting spring assembly without affecting any foldangles or any other parts of the springs.
  • the machinery for making the springs is readily setup to make spring assemblies of varying heights at practically no additional cost. This is accomplished while also providing improved spring characteristics for the spring assembly which will impart the desirable resilient firmness to the spring assembly deck.
  • FIGURE 1 is a plan view of the box spring assembly of this invention
  • FIGURE 2 is an enlarged transverse sectional view of a portion of the box spring assembly of this invention as seen from substantially the line 22 in FIG. 1, illustrating in broken lines the shape of the spring for achieving an increased spring assembly height;
  • FIGURE 3 is a foreshortened developed view of the intermediate support spring shown in FIG. 2 illustrating in broken lines the shape of the spring for achieving the increased spring height shown in broken lines in FIG. 2;
  • FIGURE 4 is a fragmentary perspective view of a portion of the spring assembly of this invention illustrating the intermediate support spring shown in FIG. 2;
  • FIGURE 5 is'an enlarged fragmentary transverse sectional view of a portion of the spring assembly of this invention as seen from substantially the line 55 in FIG. 1, illustrating in broken lines the shape of the spring for obtaining an increased spring assembly height;
  • FIGURE 6 is a fragmentary perspective view of the portion of the spring assembly of this invention illustrated in FIG. 5.
  • the spring assembly of this invention is illustrated in FIG. 1 as including a rectangular support frame 12, shown as being formed of wood but which can also be formed of metal, plastic or the like, a plurality of main springs 14 which extend lengthwise of the frame 12, and a plurality of main springs 16 which extend transversely of the main frame 12.
  • a sectional border wire 18 is secured to the main springs 14 and 16 so that the border wire 18 is disposed above the periphery of the frame 12.
  • Each main spring 16 includes a substantially straight wire load supporting portion 24 (FIG. 1 and 5 which is formed at its ends with integral mounting portions 26 which are substantially identical, being right and left hand versions of each other.
  • Each mounting portion 26 extends in a direction generally normal to the load supporting portion 24 and functions to resiliently support one end of the load supporting portion 24 above the frame 12.
  • the spring 16 is formed, at the juncture of the load supporting portion 24 and the mounting portion 26, with a first torsion bar 28 which is parallel to and spaced above a second torsion bar 30.
  • a leg 32 which is substantially perpendicular to the plane occupied by the load supporting portion 24 connects the torsion bars 28 and 30 at one of their ends, and the length of the leg 32 determines the spacing between the torsion bars 28 and 30.
  • the opposite end of the torsion bar 30 is formed with an inclined connecting section 34 which is in turn formed integral with another torsion bar 36, another inclined connecting section 38, another torsion bar 40, another inclined connecting section 42, still another torsion bar 44, a final inclined connecting section 46, and a final torsion bar 48 which is positioned in engagement with the top side of the frame 12.
  • the mounting portion 26 is secured to the frame 12 by extending staples 50 through the torsion bar 48 and an L-shape leg 52 formed integral therewith.
  • the connecting sections 34, 38, 42 and 46 are arranged in a substantially W-formation for resiliently supporting the top torsion bar 28.
  • Each torsion bar 28 is connected by a conventional spring clip 53 to the border Wire 18 which reinforces the torsion bar 28 so that it cannot tilt to any great extent toward the adjacent torsion bar 30.
  • the connecting sections 34, 38, 42 and 46 tend to be twisted by the relative movement of the torsion bars at the ends thereof so that the connecting sections also function to some extent as torsion bars. The net result is a desirable firm resistance to load with the amount of resilience associated with comfort.
  • Each support spring 20 also includes a straight wire load supporting portion 54 which, as shown in FIG. 1, extends somewhat diagonally across the rectangular space formed by intersecting pairs of main springs 14 and 16.
  • the ends of the straight wire load support portion 54 are formed with straight wire attaching sections 56 which are secured by clips 58 to the main springs 14.
  • These straight wire sections 56 are formed integral with the top torsion bars 60 in the resilient end mounting portions 62 for the intermediate support spring 20 which extend generally perpendicular to the load supporting portion 54. Since the mounting portions 62 for the springs 20 are substantially identical, being left and right hand versions of each other, only one mounting portion 62 is described in detail hereinafter.
  • the mounting portion 62 includes a torsion bar 64 which is substantially parallel to and spaced below the torsion bar 60.
  • a leg 66 which is substantially perpendicular to the plane of the load supporting portion 54 extends between the torsion bars 60 and 64 and the length of the leg 66 determines the spacing between the torsion bars at one end thereof.
  • Clips 67 connect the torsion bars 60 to the springs 16 so as to reinforce the torsion bars 60.
  • One end of the torsion bar 64 is also formed integral with an inclined connecting section 68 which is formed integral with a torsion bar 70, another inclined connecting section 72, another torsion bar 74, a final inclined connecting section 76, a final torsion bar 78, and a leg 80.
  • Staples 82 are illustrated for attaching the leg 80 and the torsion bar 78 to a frame rail 22. It can thus be seen, that when the portion 54 of the spring 20 is loaded, the end mounting portions 62 will deflect so as to firmly resist the load with the desired degree of resiliency.
  • the mounting portion 26 for the main spring 16 and the mounting portion 62 for the support spring 20 are different in the illustrated embodiment of the invention. It is to be understood that the usual practice is to make the mounting portions 26 and 62 identical for ease of manufacturing purposes, these spring portions being illustrated as being different only for illustrative purposes to illustrate two possible configurations for each of these springs. In ⁇ both, a substantially W-formation is achieved, the spring portion 26 having one more inclined connecting section and one more torsion bar and for that reason being advantageous from the standpoint of spring capability and length of service life.
  • the straight wire loading supporting spring portions 24 and 54 cooperate to form a load supporting Wire deck 90 which is in a plane substantially parallel to the frame 12 and on which the usual padding and fabric are mounted.
  • the spring portions 24 may be slightly inclined at their ends, as shown in FIGS. 4 and 6, but when the fabric is applied it tends to straighten out these portions.
  • Reference herein to the plane of the spring load supporting portions thus means the general plane parallel to the frame 12 in which the majority of these portions are found.
  • the deck 90 can be raised relative to the main frame 12 by forming the spring mounting portions 26 and 62 so that the legs 32 and 66,
  • FIG. 3 illustrates, in connection with spring 20, how this increased length for a spacer leg is easily obtained by merely bending the wire which forms the spring so as to relocate the top torsion bar, in this case the torsion bar 60.
  • This necessitates the use of a longer length of Wire but this can be readily accomplished and a change in the wire bending machine to achieve their different bend is also easily achieved since no changed angles or folds are necessary.
  • a box spring assembly 10 of increased height illustrated in broken lines in FIGS. 2 and 5
  • FIGS. 2 and 5 can readily be obtained without a costly change in the springs and without the use of additional material in the frame 12. The advantages of this arrangement are believed to be apparent.
  • a spring having a load supporting portion and a mounting portion at one end of said load supporting portion wherein said mounting portion extends generally normal to the plane of said load supporting portion and is of sufficient resilience to allow said load supporting portion to yieldably deflect under load
  • the improvement comprising providing a first torsion bar at the juncture of said portions and forming said mounting portion so that it has a leg of predetermined length extending substantially perpendicularly away from one end of said torsion bar, a. second torsion bar formed integral with said leg and arranged in a substantially parallel spaced relation with said first torsion bar, and a plurality of torsion bars and inclined connecting sections formed integral with said second torsion bar and extended away from said load supporting portion.
  • a spring according to claim 1 in which said plurality of torsion bars and inclined connecting sections are arranged. in a Substantially W-formation.
  • a spring according to claim 1 wherein said plurality of torsion bars and inclined connecting sections consists of at least three inclined connecting sections each of which is reversely inclined relative to the adjacent section and is connected thereto by a torsion bar.
  • a spring according to claim 1 wherein said plurality of torsion bars and inclined connecting sections consists of four connecting sections, each of which is connected to the adjacent connecting section by a torsion bar and is reversely inclined relative thereto.
  • a spring according to claim 1 wherein said leg is of a length less than one half the length of said mounting portion measured in a direction normal to the plane of said load supporting portion.
  • a spring according to claim 1 wherein said load supporting portion has said mounting portion at each end thereof and the torsion bars in said mounting portions are parallel to each other and inclined relative to said load supporting portion.

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US644358A 1967-06-07 1967-06-07 Box spring assembly Expired - Lifetime US3487480A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US64435867A 1967-06-07 1967-06-07

Publications (1)

Publication Number Publication Date
US3487480A true US3487480A (en) 1970-01-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
US644358A Expired - Lifetime US3487480A (en) 1967-06-07 1967-06-07 Box spring assembly

Country Status (7)

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US (1) US3487480A (pt)
BR (1) BR6899711D0 (pt)
DE (1) DE1778814A1 (pt)
ES (1) ES354782A1 (pt)
FR (1) FR1567789A (pt)
GB (1) GB1226800A (pt)
NL (1) NL6807966A (pt)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3574241A (en) * 1969-01-06 1971-04-13 Hoover Ball & Bearing Co Spring and frame assembly particularly for box springs
US3596299A (en) * 1969-06-30 1971-08-03 Lear Siegler Inc Spring assembly
US3715766A (en) * 1970-09-18 1973-02-13 Hoover Ball & Bearing Co Connector and stiffener member for intersecting wires
US3761972A (en) * 1971-12-20 1973-10-02 Dresser Corp Wire mat assembly for a box spring
US3833948A (en) * 1973-03-01 1974-09-10 Lear Siegler Inc Box spring assembly
US3852838A (en) * 1973-05-23 1974-12-10 Hoover Ball & Bearing Co Box spring assembly and improved springs therefor
US3938204A (en) * 1971-04-08 1976-02-17 Hoover Ball And Bearing Company Frame construction for box spring assemblies
US3977029A (en) * 1974-09-18 1976-08-31 Hoover Ball And Bearing Company Box spring assembly with coated wire components
US4020512A (en) * 1975-09-05 1977-05-03 United States Steel Corporation Bed assembly
US4060862A (en) * 1976-04-28 1977-12-06 Hoover Ball And Bearing Company Box spring assembly having serpentine right angle bend springs therein
US4238861A (en) * 1979-05-14 1980-12-16 Hoover Universal, Inc. Box spring assembly with limited deflection formed wire springs
FR2478762A1 (fr) * 1980-03-21 1981-09-25 Hoover Universal Ensemble de ressorts formant caisson dont les composants sont des fils metalliques mis en forme et verrouilles
US4371152A (en) * 1980-01-25 1983-02-01 Hoover Universal, Inc. Box spring assembly with improved spring installation capability
US4684111A (en) * 1986-02-14 1987-08-04 Webster Spring Co. Inc. Bent wire spring module
US4704752A (en) * 1986-02-28 1987-11-10 Leggett & Platt, Incorporated Box spring assembly with modular twin continuous spring elements
US4730357A (en) * 1987-03-17 1988-03-15 Leggett & Platt, Incorporated Bedding box spring

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2016872A (en) * 1933-11-29 1935-10-08 Joseph W Droll Spring structure for mattresses and the like
US2291390A (en) * 1938-05-11 1942-07-28 Kay Mfg Corp Spring mattress structure
US2870823A (en) * 1959-01-27 Spring structures
US3085259A (en) * 1960-05-20 1963-04-16 William C Sandor Bed spring construction
US3286281A (en) * 1965-02-24 1966-11-22 Hoover Ball & Bearing Co Box spring assembly

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2870823A (en) * 1959-01-27 Spring structures
US2016872A (en) * 1933-11-29 1935-10-08 Joseph W Droll Spring structure for mattresses and the like
US2291390A (en) * 1938-05-11 1942-07-28 Kay Mfg Corp Spring mattress structure
US3085259A (en) * 1960-05-20 1963-04-16 William C Sandor Bed spring construction
US3286281A (en) * 1965-02-24 1966-11-22 Hoover Ball & Bearing Co Box spring assembly

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3574241A (en) * 1969-01-06 1971-04-13 Hoover Ball & Bearing Co Spring and frame assembly particularly for box springs
US3596299A (en) * 1969-06-30 1971-08-03 Lear Siegler Inc Spring assembly
US3715766A (en) * 1970-09-18 1973-02-13 Hoover Ball & Bearing Co Connector and stiffener member for intersecting wires
US3938204A (en) * 1971-04-08 1976-02-17 Hoover Ball And Bearing Company Frame construction for box spring assemblies
US3761972A (en) * 1971-12-20 1973-10-02 Dresser Corp Wire mat assembly for a box spring
US3833948A (en) * 1973-03-01 1974-09-10 Lear Siegler Inc Box spring assembly
US3852838A (en) * 1973-05-23 1974-12-10 Hoover Ball & Bearing Co Box spring assembly and improved springs therefor
DE2418904A1 (de) * 1973-05-23 1974-12-12 Hoover Ball & Bearing Co Bettfederanordnung
US3977029A (en) * 1974-09-18 1976-08-31 Hoover Ball And Bearing Company Box spring assembly with coated wire components
US4020512A (en) * 1975-09-05 1977-05-03 United States Steel Corporation Bed assembly
US4060862A (en) * 1976-04-28 1977-12-06 Hoover Ball And Bearing Company Box spring assembly having serpentine right angle bend springs therein
US4238861A (en) * 1979-05-14 1980-12-16 Hoover Universal, Inc. Box spring assembly with limited deflection formed wire springs
US4371152A (en) * 1980-01-25 1983-02-01 Hoover Universal, Inc. Box spring assembly with improved spring installation capability
FR2478762A1 (fr) * 1980-03-21 1981-09-25 Hoover Universal Ensemble de ressorts formant caisson dont les composants sont des fils metalliques mis en forme et verrouilles
US4684111A (en) * 1986-02-14 1987-08-04 Webster Spring Co. Inc. Bent wire spring module
US4704752A (en) * 1986-02-28 1987-11-10 Leggett & Platt, Incorporated Box spring assembly with modular twin continuous spring elements
US4730357A (en) * 1987-03-17 1988-03-15 Leggett & Platt, Incorporated Bedding box spring

Also Published As

Publication number Publication date
FR1567789A (pt) 1969-05-16
NL6807966A (pt) 1968-12-09
DE1778814A1 (de) 1971-08-12
GB1226800A (pt) 1971-03-31
ES354782A1 (es) 1969-11-16
BR6899711D0 (pt) 1973-02-06

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Legal Events

Date Code Title Description
AS Assignment

Owner name: HOOVER GROUP, INC., A CORP. OF DE.

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:HOOVER UNIVERSAL, INC.;REEL/FRAME:004502/0191

Effective date: 19851031

Owner name: FIRST NATIONAL BANK OF BOSTON, THE

Free format text: SECURITY INTEREST;ASSIGNOR:HOOVER GROUP, INC., A CORP. OF DE.;REEL/FRAME:004492/0790

Effective date: 19851107

AS Assignment

Owner name: HOOVER GROUP, INC.

Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:FIRST NATIONAL BANK OF BOSTON, THE;REEL/FRAME:005580/0097

Effective date: 19900531