US3447190A - Counterbalancing lid support - Google Patents

Counterbalancing lid support Download PDF

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Publication number
US3447190A
US3447190A US678065A US3447190DA US3447190A US 3447190 A US3447190 A US 3447190A US 678065 A US678065 A US 678065A US 3447190D A US3447190D A US 3447190DA US 3447190 A US3447190 A US 3447190A
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United States
Prior art keywords
lid
desk
counterbalancing
arm
lid support
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Expired - Lifetime
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US678065A
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William H Coe
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Amerock Corp
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Keystone Consolidated Industries Inc
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Assigned to KEYCON INDUSTRIES, INC. 4835 LBJ FREEWAY, DALLAS, 75234, A CORPOF NEVADA reassignment KEYCON INDUSTRIES, INC. 4835 LBJ FREEWAY, DALLAS, 75234, A CORPOF NEVADA ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: KEYSTONE CONSOLIDATED INDUSTRIES, INC., A CORP OF DE.
Assigned to LLC CORPORATION, A CORP OF DELAWARE reassignment LLC CORPORATION, A CORP OF DELAWARE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: KEYCON INDUSTRIES, INC., A CORP OF NEV.
Anticipated expiration legal-status Critical
Assigned to ANCHOR HOCKING CORP., A CORP OF DE. reassignment ANCHOR HOCKING CORP., A CORP OF DE. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: LLC CORPORATION
Assigned to AMEROCK CORPORATION reassignment AMEROCK CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ANCHOR HOCKING CORP.
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
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B41/00—School desks or tables
    • A47B41/02—Adjustable, inclinable, sliding or foldable desks tops
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B2200/00—General construction of tables or desks
    • A47B2200/0035—Tables or desks with features relating to adjustability or folding
    • A47B2200/004—Top adjustment
    • A47B2200/0043—Inclination adjustable work top
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F1/00—Closers or openers for wings, not otherwise provided for in this subclass
    • E05F1/08—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings
    • E05F1/10—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings for swinging wings, e.g. counterbalance
    • E05F1/1041—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings for swinging wings, e.g. counterbalance with a coil spring perpendicular to the pivot axis
    • E05F1/105—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings for swinging wings, e.g. counterbalance with a coil spring perpendicular to the pivot axis with a compression spring
    • E05F1/1058—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings for swinging wings, e.g. counterbalance with a coil spring perpendicular to the pivot axis with a compression spring for counterbalancing

Definitions

  • a counterbalancing lid support designed to support lids of school desk size and weight having a metal cover or housing secured within the pan of the desk and housing a plastic liner.
  • a compression spring is positioned within the liner and a rod has a T-bar at one end fitting in a swivel mounted on the desk lid and a partial spherical member at the opposite end received in the plastic liner and abutting one end of the spring.
  • Different weight lids can be accommodated with this lid support merely by changing the mounting location on the desk lid and pan.
  • the present invention relates to a counterbalancing lid support and more particularly to a lid support used on the lids of school desk size and weight.
  • a common type ofdesk for a child utilizes a desk pan or receptaclegenerally formed of metal which is of a generally dished shape to store the books, pencils and other school supplies.
  • the desk has a lid hinged adjacent the rear edge of the pan and which is lifted to obtain access to the contents or to replace school materials.
  • accidents occur where the lid is inadvertently released or dropped and which may injure a child if his head or other portion of his body is in the way of the lid such as if his fingers are between the lid and the edge of the desk pan.
  • the present invention obviates these problems by providing a lid support having means to prevent the lid from falling closed under its own weight.
  • the lid support includes a rod having one end received in a metal cover or housing secured to the desk pan and this end abutting an end of a compression spring housed within a plastic liner in the cover.
  • the opposite end of the rod is mounted in a swivel secured to the underside of the desk lid.
  • the plastic liner is positioned in the cover and houses the spring to prevent the spring from rubbing or frictional contact with the interior of the metal cover and thus avoid noise incident to metal-to-metal contact.
  • Another object of the present invention is the provision of a counterbalancing lid support having a swivel mounting on the lid of thedesk providing a wide contact area with a T-bar or arm formed on the end of the rod.
  • the broad contact area prevents excessive wear thereat which has been a problem of prior lid supports. No friction is utilized as a part of the control as the spring acting on the rod provides all of the counterbalancing force.
  • a further object of the present invention is the provision of a counterbalancing lid support having a selfaligning swivel provided by a rounded enlarged end or partial spherical member formed or provided on the end of the rod received in the cover and liner.
  • the ball shape on the rod acts as a swivel on the spring and also adds a self-aligning feature to the rod.
  • the present invention also comprehends the provision of a counterbalancing lid support for school desk lids having a housing secured to the interior side surface of the desk pan and a swivel connection secured to the underside of the lid.
  • FIGURE 1 is an enlarged perspective view of the counterbalancing lid support operatively mounted on the desk pan and the desk lid with the lid open position.
  • FIG. 2 is a front elevational view of the counterbalancing lid support with the rod and swivel mounting shown in one position in solid lines and in a second position in dotted lines.
  • FIG. 3 is a top plan view of the counterbalancing lid support of FIGS. 1 and 2 with the lid and swivel omitted.
  • FIG. 4 is a horizontal cross sectional view taken on the line 4--4 of FIG. 2.
  • FIG. 1 discloses a counterbalancing lid support 10 mounted within and on a side Wall of the pan 11 of a desk and secured to the desk lid 12 which is hingedly mounted at 13 to the rear Wall of the pan 11.
  • the lid support 10 includes a metal cover or housing 14 having a front wall 15, parallel side walls 16, 16 and mounting flanges 17, 17 integral with the side walls 16, 1-6 and having openings receiving suitable attaching means, such as the screws 18.
  • the cover has a closed lower end 19 formed by inturned flanges and the upper end is provided with a pair of inturned flanges 21, 21, the flanges at the opposite ends being integral with the side walls 16, 16.
  • Each flange 21 is provided with a pair of parallel legs 22, 23 defining therebetween a central slot 24, the legs 23, 23 of each flange being shorter than the leg 22 so as to provide an intermediate slot 25 opening into slots 24, 24 to form a T-shaped recess (FIG. 3).
  • a liner 26 formed of a suitable plastic material which has a lower open end 27 abutting the closed end 19 of the cover and an enlarged open upper end at 28, the liner 26 housing a compression spring 29 therein.
  • One end of the spring 29 abuts the lower closed end 19 of the cover and the other end extends upward to adjacent the upper end 28 of the liner 26.
  • An arm or rod 31 extends between the cover 14 and a swivel mounting 32 on the desk lid with the arm 31 terminating at one end in a T-bar 33 fitting within a swivel bracket 34 of the swivel mounting 32 secured to the underside of the lid 12 by suitable fastening means such as screws 35.
  • the bracket 34 has a raised transverse central portion 36 receiving the T-bar 33, and a longi-' tudinal slot 37 across the raised portion 36 receives the end of arm 31 to allow for pivotal motion of the arm.
  • the opposite end of the arm 31 terminates in a rounded enlargement or partial spherical part 38 having its rounded surface 39 abutting the upper end of the compression spring 29.
  • the ball shape 38 on the rod 31 acts as a swivel on the end of the spring 29 and also adds a self-aligning feature to the support unit.
  • the plastic liner 26 is utilized to guide the spring 29 and rod 31 and to prevent the spring from frictional contact with or rubbing on the interior of the metal cover and making noise incident to metal-to-metal contact
  • the slots 24, 24 are aligned in the cover 14 to receive the arm 31 and allow the swivel action of the arm when the lid 12 is moved relative to the desk pan 11.
  • the wide contact area of the shown in fully tion relative to the desk pan 11 and the compression spring 29 acting against the arm 31 retains the lid in its open position.
  • the ball 38 on the arm 31 travels down within the liner 26 depressing the spring 29.
  • the spring 29 and arm 31 remain in this position until the lid is manually lifted.
  • the spring 29 exerts force against the ball 38 to counterbalance and prevent the lid from falling closed from its own weight.
  • a counterbalancing lid support for the lid of a desk having a desk pan with the lid hingedly mounted thereon comprising an elongated cover secured to the interior surface of the desk pan and having a closed lower end and a slotted upper end, a plastic liner positioned in said cover, a compression spring received in said liner, a reciprocable arm having a round enlargement at one end abutting said compression spring in the cover to provide a swivel for the arm on said spring and the opposite end pivotally connected to said desk lid, and a swivel bracket secured to the underside of the desk lid and receiving said last mentioned end of said arm.

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Description

June 3, 1969 w, co I 3,447,190
COUNTERBA LANCING LID SUPPORT Filed Oct. 25, 1967 United States Patent US. Cl. 16-1 6 Claims ABSTRACT OF THE DISCLOSURE A counterbalancing lid support designed to support lids of school desk size and weight having a metal cover or housing secured within the pan of the desk and housing a plastic liner. A compression spring is positioned within the liner and a rod has a T-bar at one end fitting in a swivel mounted on the desk lid and a partial spherical member at the opposite end received in the plastic liner and abutting one end of the spring. Different weight lids can be accommodated with this lid support merely by changing the mounting location on the desk lid and pan.
The present invention relates to a counterbalancing lid support and more particularly to a lid support used on the lids of school desk size and weight.
In school rooms, a common type ofdesk for a child utilizes a desk pan or receptaclegenerally formed of metal which is of a generally dished shape to store the books, pencils and other school supplies. The desk has a lid hinged adjacent the rear edge of the pan and which is lifted to obtain access to the contents or to replace school materials. As the desk lid is freely hinged, accidents occur where the lid is inadvertently released or dropped and which may injure a child if his head or other portion of his body is in the way of the lid such as if his fingers are between the lid and the edge of the desk pan. The present invention obviates these problems by providing a lid support having means to prevent the lid from falling closed under its own weight.
Among the objects of the present invention is the provision of a counterbalancing lid support to support lids of school desk size so that the lid cannot fall closed from its own weight. The lid support includes a rod having one end received in a metal cover or housing secured to the desk pan and this end abutting an end of a compression spring housed within a plastic liner in the cover. The opposite end of the rod is mounted in a swivel secured to the underside of the desk lid. The plastic liner is positioned in the cover and houses the spring to prevent the spring from rubbing or frictional contact with the interior of the metal cover and thus avoid noise incident to metal-to-metal contact.
Another object of the present invention is the provision of a counterbalancing lid support having a swivel mounting on the lid of thedesk providing a wide contact area with a T-bar or arm formed on the end of the rod. The broad contact area prevents excessive wear thereat which has been a problem of prior lid supports. No friction is utilized as a part of the control as the spring acting on the rod provides all of the counterbalancing force.
A further object of the present invention is the provision of a counterbalancing lid support having a selfaligning swivel provided by a rounded enlarged end or partial spherical member formed or provided on the end of the rod received in the cover and liner. The ball shape on the rod acts as a swivel on the spring and also adds a self-aligning feature to the rod.
The present invention also comprehends the provision of a counterbalancing lid support for school desk lids having a housing secured to the interior side surface of the desk pan and a swivel connection secured to the underside of the lid. With this arrangement of parts, different weight lids can be accommodated just by changing the mounting location on the lid and pan.
Further objects are to provide a construction of maximum simplicity, efliciency, economy and ease of assembly and operation, and such further objects, advantages and capabilities as will later more fully appear and are inherently possessed thereby.
In the drawings: 7
FIGURE 1 is an enlarged perspective view of the counterbalancing lid support operatively mounted on the desk pan and the desk lid with the lid open position.
FIG. 2 is a front elevational view of the counterbalancing lid support with the rod and swivel mounting shown in one position in solid lines and in a second position in dotted lines.
FIG. 3 is a top plan view of the counterbalancing lid support of FIGS. 1 and 2 with the lid and swivel omitted.
FIG. 4 is a horizontal cross sectional view taken on the line 4--4 of FIG. 2.
Referring more particularly to the disclosure in the drawing wherein is shown an illustrative embodiment of the present invention, FIG. 1 discloses a counterbalancing lid support 10 mounted within and on a side Wall of the pan 11 of a desk and secured to the desk lid 12 which is hingedly mounted at 13 to the rear Wall of the pan 11. The lid support 10 includes a metal cover or housing 14 having a front wall 15, parallel side walls 16, 16 and mounting flanges 17, 17 integral with the side walls 16, 1-6 and having openings receiving suitable attaching means, such as the screws 18. The cover has a closed lower end 19 formed by inturned flanges and the upper end is provided with a pair of inturned flanges 21, 21, the flanges at the opposite ends being integral with the side walls 16, 16.
Each flange 21 is provided with a pair of parallel legs 22, 23 defining therebetween a central slot 24, the legs 23, 23 of each flange being shorter than the leg 22 so as to provide an intermediate slot 25 opening into slots 24, 24 to form a T-shaped recess (FIG. 3). Conformably positioned within the cover 14 is a liner 26 formed of a suitable plastic material which has a lower open end 27 abutting the closed end 19 of the cover and an enlarged open upper end at 28, the liner 26 housing a compression spring 29 therein. One end of the spring 29 abuts the lower closed end 19 of the cover and the other end extends upward to adjacent the upper end 28 of the liner 26.
An arm or rod 31 extends between the cover 14 and a swivel mounting 32 on the desk lid with the arm 31 terminating at one end in a T-bar 33 fitting within a swivel bracket 34 of the swivel mounting 32 secured to the underside of the lid 12 by suitable fastening means such as screws 35. The bracket 34 has a raised transverse central portion 36 receiving the T-bar 33, and a longi-' tudinal slot 37 across the raised portion 36 receives the end of arm 31 to allow for pivotal motion of the arm.
The opposite end of the arm 31 terminates in a rounded enlargement or partial spherical part 38 having its rounded surface 39 abutting the upper end of the compression spring 29. The ball shape 38 on the rod 31 acts as a swivel on the end of the spring 29 and also adds a self-aligning feature to the support unit. The plastic liner 26 is utilized to guide the spring 29 and rod 31 and to prevent the spring from frictional contact with or rubbing on the interior of the metal cover and making noise incident to metal-to-metal contact The slots 24, 24 are aligned in the cover 14 to receive the arm 31 and allow the swivel action of the arm when the lid 12 is moved relative to the desk pan 11. Also, the wide contact area of the shown in fully tion relative to the desk pan 11 and the compression spring 29 acting against the arm 31 retains the lid in its open position. When the lid 12 is being closed, the ball 38 on the arm 31 travels down within the liner 26 depressing the spring 29. When the lid 12 is fully closed, the spring 29 and arm 31 remain in this position until the lid is manually lifted. When the lid is opened, the spring 29 exerts force against the ball 38 to counterbalance and prevent the lid from falling closed from its own weight. By this arrangement, different Weights of lids can be accommodated just by changing the mounting location of the support 10 on the desk lid 12 and desk pan 11.
Having thus disclosed my invention, I claim:
1. A counterbalancing lid support for the lid of a desk having a desk pan with the lid hingedly mounted thereon, comprising an elongated cover secured to the interior surface of the desk pan and having a closed lower end and a slotted upper end, a plastic liner positioned in said cover, a compression spring received in said liner, a reciprocable arm having a round enlargement at one end abutting said compression spring in the cover to provide a swivel for the arm on said spring and the opposite end pivotally connected to said desk lid, and a swivel bracket secured to the underside of the desk lid and receiving said last mentioned end of said arm.
2. A counterbalancing lid support as set forth in claim 1, in which said cover has a front wall and side walls with outwardly extending mounting flanges and end flanges integral with said side walls providing a closure at the ends of the cover, the upper end flanges being .4 slot-ted for receiving and allowing swivelling movement of said arm.
3. A counterbalancing lid support as set forth in claim 1, in which said rounded enlargement on the one end of said arm is positioned within said liner and cover.
4. A counterbalancing lid support as set forth in claim 1, in which said arm terminates at its upper end in a T-bar received in said swivel bracket to provide unidirectional swivelling movement of the arm relative to the lid.
5. A counterbalancing lid support as set forth in claim 4, in which said swivel bracket includes a raised transverse portion receiving said T-bar and has an elongated slot intersecting and transverse to the axis of the raised portion.
6. A counterbalancing lid support as set forth in claim 3, in which said rounded enlargement on the end of the arm is a partial spherical member.
References Cited UNITED STATES PATENTS 1,712,648 5/1929 Campbell.
2,641,795 6/1953 James et al. l'6--85 XR 2,843,226 7/1958 Nordmark 108-6 XR FOREIGN PATENTS 33,697 4/ 1934 Netherlands.
BOBBY R. GAY, Primary Examiner.
J. L. KOHNEN, Assistant Examiner.
US. Cl. X.R. 16-85
US678065A 1967-10-25 1967-10-25 Counterbalancing lid support Expired - Lifetime US3447190A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6145397A (en) * 1998-10-01 2000-11-14 Applied Materials, Inc. Simple lift assist module
EP1048512A3 (en) * 1999-04-27 2003-05-21 C.Rob. Hammerstein GmbH & Co.KG Handle device for an actuating device on a vehicle seat
EP1048513A3 (en) * 1999-04-27 2003-05-21 C.Rob. Hammerstein GmbH & Co.KG Handle device for an actuating device on a vehicle seat

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL33697C (en) *
US1712648A (en) * 1921-10-27 1929-05-14 Underwood Elliott Fisher Co Typewriter-machine casing
US2641795A (en) * 1950-12-28 1953-06-16 Heatilator Inc Counterbalancing spring hinge
US2843226A (en) * 1956-04-11 1958-07-15 American Seating Co Adjustable tilt top table

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL33697C (en) *
US1712648A (en) * 1921-10-27 1929-05-14 Underwood Elliott Fisher Co Typewriter-machine casing
US2641795A (en) * 1950-12-28 1953-06-16 Heatilator Inc Counterbalancing spring hinge
US2843226A (en) * 1956-04-11 1958-07-15 American Seating Co Adjustable tilt top table

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6145397A (en) * 1998-10-01 2000-11-14 Applied Materials, Inc. Simple lift assist module
EP1048512A3 (en) * 1999-04-27 2003-05-21 C.Rob. Hammerstein GmbH & Co.KG Handle device for an actuating device on a vehicle seat
EP1048513A3 (en) * 1999-04-27 2003-05-21 C.Rob. Hammerstein GmbH & Co.KG Handle device for an actuating device on a vehicle seat

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AS Assignment

Owner name: KEYCON INDUSTRIES, INC. 4835 LBJ FREEWAY, DALLAS,

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:KEYSTONE CONSOLIDATED INDUSTRIES, INC., A CORP OF DE.;REEL/FRAME:004473/0742

Effective date: 19851009

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Owner name: LLC CORPORATION, 4835 LBJ FREEWAY, DALLAS, TEXAS,

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:KEYCON INDUSTRIES, INC., A CORP OF NEV.;REEL/FRAME:004533/0100

Effective date: 19860220

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Owner name: ANCHOR HOCKING CORP., 109 NORTH BROAD STREET, LANC

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:LLC CORPORATION;REEL/FRAME:004595/0812

Effective date: 19860509

AS Assignment

Owner name: AMEROCK CORPORATION,ILLINOIS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ANCHOR HOCKING CORP.;REEL/FRAME:004582/0533

Effective date: 19860721

Owner name: AMEROCK CORPORATION, 4000 AUBURN STREET, ROCKFORD,

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ANCHOR HOCKING CORP.;REEL/FRAME:004582/0533

Effective date: 19860721