US3574241A - Spring and frame assembly particularly for box springs - Google Patents

Spring and frame assembly particularly for box springs Download PDF

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Publication number
US3574241A
US3574241A US789314A US3574241DA US3574241A US 3574241 A US3574241 A US 3574241A US 789314 A US789314 A US 789314A US 3574241D A US3574241D A US 3574241DA US 3574241 A US3574241 A US 3574241A
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United States
Prior art keywords
bars
torsion
spring
bar
end portion
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Expired - Lifetime
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US789314A
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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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Publication of US3574241A publication Critical patent/US3574241A/en
Assigned to HOOVER GROUP, INC. reassignment HOOVER GROUP, INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: HOOVER UNIVERSAL, INC.
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.
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

Definitions

  • Each of the main springs has a resilient end portion movable between an upwardly extending position when not loaded and a downwardly compressed position when under load, and each of these end portions includes a pair of generally upright spacer bars that function to limit the magnitude of the downward movement of the main spring when under load.
  • the conventional box spring consists of a rectangular wood frame on which a plurality of coil springs and border wires are mounted, and a fabric; cover and pad which are positioned over the spring and the border wires and attached to the frame.
  • the spring and frame assembly of this invention which is particularly adapted for box springs, eliminates the conventional coil springs and consists generally of a wood frame and a plurality of substantially identical mainsprings which extend crisscross fashion above the frame and have depending resilient end portions secured to the frame.
  • the spring and frame assembly of this invention consists of a rectangular frame and transversely extending support members or slats which aremounted on the frame.
  • the resilient end portions of the mainsprings are mounted on the frame so that they normally maintain the spring body portions at a predetermined elevation above the frame. When the springs are loaded, the resilient end portions are compressible to allow the body-portions to move toward the frame.
  • Each mainspring end portion includes a pair of generally upright spacer bars having transversely extending torsion bars at their upper ends. The torsion bars are located so that they extend transversely of the body portion at a position directly below the body portion.
  • FIG. I is a plan view of the spring and frame assembly of this invention.
  • FIG. 2 is a perspective view of a portion of a mainspring in the assembly of this invention
  • FIG. 3 is a developed plan view of the spring portion shown in FIG. 2;
  • FIG. 4 is an enlarged transverse sectional view of a portion of the spring and frame assembly of this invention, as seen from substantially the line 4-4 in FIG. 1, showing the spring in a partially compressed position in solid lines and in an expanded position in broken lines;
  • FIG. 5 is a transverse sectional view, illustrated similarly to FIG. 4, showing the spring in solid lines in a fully compressed position and in broken lines in an expanded position;
  • FIG. 6 is a fragmentary top view of the mainpsring of this invention in its fully compressed position shown in FIG. 5.
  • the mainsprings l4 and 16 are substantially identical, differing only in that the springs 14 are longer than the springs 16.
  • Each mainspring 14 and 16 includes an elongated loadsupport or body portion 28, illustrated as being a substantially straight length of wire, and end portions 30 which are rightand left-hand versions of each other and extend downwardly from the ends of the body portion 28.
  • Each mainspring end portion 30 includes five torsion bars 32, 33, 34, 35 and 36, a connecting bar 38 which extends downwardly and inwardly from one end of the torsion bar 32 to one end of the torsion bar 33 in the expanded position of the end portion 30 shown in FIG. 2, and a connecting bar 40 which extends downwardly and outwardly from one end of the torsion bar 34 to one end of the torsion bar 35.
  • the connecting bars 38 and 40 are disposed in substantially the same vertical plane, the significance of which will appear later.
  • the end portion 30 also includes a pair of generally upright spacer bars 42 and 44, which are also disposed in substantially the same vertical plane spaced from the plane in which the connecting bars 38 and 40 are disposed.
  • FIGS. 2 and 3 a straight end section 49 of the mainspring body portion 28 is illustrated, and as there shown, the section 49 is located between the vertical planes described above.
  • the end section 49 is disposed in a vertical plane located between the plane in which the bars 38 and 40 are located and the plane in which the bars 42 and 44 are located. Since the torsion bars 33 and 35 extend between these latter planes, they are engageable with the section 49 to limit downward movement thereof.
  • the springs 14 are positioned so that the end portions 30 thereof are supported on the end rails 18.
  • the usual staples 50 are employed to connect the attaching bars 48 to the end rails 18 as shown in FIG. 1.
  • the mainsprings 16 are extended transversely of the mainsprings l4 and positioned so that their end portions 30 are supported on the frame members 22.
  • the body portion 28 in each mainspring 16 is positioned in substantial vertical alignment with one edge of a frame member 22. This locates the attaching foot 46 intermediate the edges of the support member 22 so that there is no danger of the attaching bar 48 extending beyond either edge of the support member 22.
  • the reduced length of the bars 48 relative to the torsion bars 33- 36 facilitates this location.
  • the end torsion bars 32 in the mainsprings 14 and 16 are secured by clips 52 (FIG. 1) to the border wire 24 which is of continuous rectangular shape corresponding to the shape of the frame 12, and the body portions 28 for the mainsprings I4 and 16 are secured by clips 54 to the internal support springs 26.
  • the spring body portions 28 When the assembly M) is loaded, the spring body portions 28 are moved toward the frame 12, as shown in full lines in FIG. 4. During such movement the border wire 24 must move straight down and it is important to note that the torsion bars 32, 33 and 35 are all subjected to substantially the same angle of twist. In other words, these torsion bars 32, 33 and 35 cooperate so that they provide substantially equal resistance to the load tending to compress the spring end portion 30. As a result, overstressing of a spring component is avoided to thereby avoid the danger of the spring taking a set in response to repeated loads.
  • the spring end portion 30 is constructed so as to limit deflection of the spring body portion 28, in the manner illustrated in FIG. 5.
  • the spacer bar 42 will engage the frame member 22 when the spring end portion 30 has been fully compressed.
  • the torsion bars 33 and 35 are located directly below the end section 49 of the spring body portion 28 so as to be engageable therewith and limit downward movement of the body portion 28.
  • This location of the torsion bars 33 and 35 is achieved by constructing the spring end portion 30 so that the torsion bar 32 is of reduced length relative to the torsion bars 3336, as shown in FIG. 3.
  • the spring body portion 28 cannot snap over the end portion 30 and continuous downward movement toward the frame 12 is thus prevented.
  • the configuration of the spring end portions 30 effectively limits deflection of the mainsprings l4 and 16.
  • the torsion bars 32, 33 and 35 have all been twisted through substantially the same angle, so that they continue to'cooperate in sharing equally the load applied to the spring assembly. This is accomplished by inclining the connecting bar 38 relative to the horizontal at an angle on the order of 45 and by locating the connecting bar 40 so that it moves through an angle of substantially 45 between its expanded and compressed positions shown in broken and solid line positions, respectively, in FIG. 5. The result is a substantially equal twisting of the torsion bars 32, 33 and 35.
  • the attaching foot 46 is urged downwardly tightly against the frame member 22.
  • the inclining of the attachment bar 48 provides the leg 46 with improved resistance to pivoting of the spring end portion 30, thus providing an improved attachment base for the spring.
  • this inclining of the attachment bar 48 enables the bar to be formed of a reduced length relative to the torsion bars 3336.
  • the reduced lengths of the torsion bar 32 and the attachment bar 48 also imparts advantageous economies in the manufacture of the spring and frame assembly 10.
  • this invention provides an improved spring and frame assembly in which the torsion bars 32, 33 and 35 cooperate, by virtue of the configuration of the spring end portion 30 to resist spring loads in a manner to preclude the end portion 30 from taking a set in response to repeated loads.
  • the spring end portion 30 has an inherent limited deflection characteristic which is desirable for spring life purpose.
  • the inclined attachment bar 48 imparts added fimmess to the mounting for the spring assembly 10, and all of these characteristics cooperate to provide an assembly 10 which can be economically manufactured and used comfortably over a prolonged service life.
  • a spring and frame assembly comprising a generally rectangular and substantially horizontal frame, a plurality of wire springs arranged crisscross fashion on said frame, each of said springs including a body portion disposed in a spaced relation above said frame and at least one resilient end portion extending between said body portion and said frame so as to support said body portion on said frame, said end portion including relatively inclined connecting bars which are relatively movable to enable compression and expansion of said end portion with a corresponding movement of said body portion toward and away from said frame, a pair of substantially upright spacer bars and a plurality of torsion bars connecting to said connecting bars and said spacer bars, a pair of said torsion bars being located at the upper ends of said spacer bars, said spacer bars being engageable with said frame to limit downward movement of said end portion toward said frame, and said body portion being engageable with at least one of said pair of said torsion bars in said end portion to limit movement of said body portion toward said frame.
  • a spring andframe assembly according to claim 4 wherein one of said connecting bars extends downwardly and inwardly from one end of said reduced length torsion bar, another one of said torsion bars extends transversely from the inner end of said connecting bar, one of said spacer bars extends downwardly from said one torsion bar, another one of said torsion bars extends from the lower end of said one spacer bar in a substantially parallel relation with said one torsion bar, another one of said connecting bars extends outwardly from said other torsion bar, and the other one of said spacer bars extends downwardly relative to the outer end of said other connecting bar.
  • a spring comprising a wire member shaped to form a body portion having a substantially horizontal and substantially straight end section and a resilient end portion which extends downwardly from said end section, said end portion being movable between an expanded position and a compressed position, said end portion in said compressed position providing for movement of said end section downwardly relative to the position thereof in said expanded position, said end portion including upright spacer bars and torsion bars connected to the upper ends of said spacer bars and extending transversely of said end section at a position directly therebelow, and connecting bars in said end portion movable relative to each other to enable said movement of said end portion between said positions.
  • said end portion further includes a torsion bar at the upper end of said end portion, one of saidconnecting bars extending downwardly and inwardly from said upper end torsion bar at an angle of about 45 in said expanded position of said end portion, one of said spacer bars being located at the lower end of said one connecting bar, another one of said connecting bars extending outwardly from the lower end of said one spacer bar, and the other spacer bar being located adjacent the outer end of said other connecting bar.
  • a spring according to claim 9 wherein said connecting bars are disposed in a common vertical plane and said spacer bars are disposed in a common vertical plane spaced from the plane of said connecting bars, said planes being located on opposite sides of said straight end section.
  • a spring accordingto claim 10 wherein said end portion is shaped so that one of said connecting bars extends downwardly and inwardly underneath said body portion and the other connecting bar is disposed below said one connecting bar, a pair of said torsion bars being located at the inner ends of said connecting bars, and one of said spacer bars being connected to and extended between said pair of torsion bars.

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US789314A 1969-01-06 1969-01-06 Spring and frame assembly particularly for box springs Expired - Lifetime US3574241A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US78931469A 1969-01-06 1969-01-06

Publications (1)

Publication Number Publication Date
US3574241A true US3574241A (en) 1971-04-13

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ID=25147261

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Application Number Title Priority Date Filing Date
US789314A Expired - Lifetime US3574241A (en) 1969-01-06 1969-01-06 Spring and frame assembly particularly for box springs

Country Status (9)

Country Link
US (1) US3574241A (nl)
BR (1) BR6912398D0 (nl)
CA (1) CA922821A (nl)
CH (1) CH521532A (nl)
DE (1) DE1963397C3 (nl)
ES (1) ES369467A1 (nl)
FR (1) FR2027781A1 (nl)
GB (1) GB1236697A (nl)
NL (1) NL159872C (nl)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3725965A (en) * 1972-03-10 1973-04-10 Leggett & Platt Box spring assembly
US3852838A (en) * 1973-05-23 1974-12-10 Hoover Ball & Bearing Co Box spring assembly and improved springs therefor
US4012802A (en) * 1974-12-16 1977-03-22 Simmons Company Mattress foundation
US4120058A (en) * 1977-08-15 1978-10-17 Hoover Universal, Inc. Low profile box spring assembly
US4195376A (en) * 1978-09-13 1980-04-01 Hoover Universal, Inc. Box spring assembly with improved end stiffness
US4218790A (en) * 1979-05-07 1980-08-26 Hoover Universal, Inc. Box spring assembly with improved stiffness characteristics
US4470584A (en) * 1982-01-29 1984-09-11 Hoover Universal, Inc. Box spring assembly
US4559654A (en) * 1983-09-14 1985-12-24 Mizelle Ned W Bedding units and components for such units
US4577841A (en) * 1984-07-18 1986-03-25 Webster Spring Co. Inc. Bent wire spring unit
WO1987003792A1 (en) * 1985-12-24 1987-07-02 Mizelle Ned W Bedding units and components for such units
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
US5165667A (en) * 1990-08-29 1992-11-24 Hoover Group, Inc. Box spring assembly with crosswires having integral sinuous end springs
US20080053669A1 (en) * 2006-08-17 2008-03-06 Yanming Hou Using a can bus engine torque/speed message as load feedback for implement draft control

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4921228A (en) * 1988-11-04 1990-05-01 Hoover Group, Inc. Box spring unit with interlocking spring and grid assembly
US4932535A (en) * 1989-02-27 1990-06-12 Hoover Group, Inc. Formed wire spring element for box spring assemblies
JP4259429B2 (ja) 2004-08-24 2009-04-30 ヤマハ株式会社 電気弦楽器

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3286281A (en) * 1965-02-24 1966-11-22 Hoover Ball & Bearing Co Box spring assembly
US3487480A (en) * 1967-06-07 1970-01-06 Hoover Ball & Bearing Co Box spring assembly

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3286281A (en) * 1965-02-24 1966-11-22 Hoover Ball & Bearing Co Box spring assembly
US3487480A (en) * 1967-06-07 1970-01-06 Hoover Ball & Bearing Co Box spring assembly

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3725965A (en) * 1972-03-10 1973-04-10 Leggett & Platt Box spring assembly
US3852838A (en) * 1973-05-23 1974-12-10 Hoover Ball & Bearing Co Box spring assembly and improved springs therefor
US4012802A (en) * 1974-12-16 1977-03-22 Simmons Company Mattress foundation
US4120058A (en) * 1977-08-15 1978-10-17 Hoover Universal, Inc. Low profile box spring assembly
US4195376A (en) * 1978-09-13 1980-04-01 Hoover Universal, Inc. Box spring assembly with improved end stiffness
US4218790A (en) * 1979-05-07 1980-08-26 Hoover Universal, Inc. Box spring assembly with improved stiffness characteristics
US4470584A (en) * 1982-01-29 1984-09-11 Hoover Universal, Inc. Box spring assembly
US4559654A (en) * 1983-09-14 1985-12-24 Mizelle Ned W Bedding units and components for such units
US4577841A (en) * 1984-07-18 1986-03-25 Webster Spring Co. Inc. Bent wire spring unit
WO1987003792A1 (en) * 1985-12-24 1987-07-02 Mizelle Ned W Bedding units and components for such units
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
US5165667A (en) * 1990-08-29 1992-11-24 Hoover Group, Inc. Box spring assembly with crosswires having integral sinuous end springs
US20080053669A1 (en) * 2006-08-17 2008-03-06 Yanming Hou Using a can bus engine torque/speed message as load feedback for implement draft control

Also Published As

Publication number Publication date
NL6909104A (nl) 1970-07-08
CH521532A (de) 1972-04-15
NL159872C (nl) 1979-09-17
DE1963397A1 (de) 1970-07-23
ES369467A1 (es) 1971-06-01
FR2027781A1 (nl) 1970-10-02
NL159872B (nl) 1979-04-17
CA922821A (en) 1973-03-13
DE1963397C3 (de) 1979-04-05
DE1963397B2 (de) 1978-08-24
GB1236697A (en) 1971-06-23
BR6912398D0 (pt) 1973-02-01

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Legal Events

Date Code Title Description
AS Assignment

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

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

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