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US4637167A Expired / Lapsed US ⏱️ 0.0 years remaining

Door

Assignee: Termofrost Sweden AB
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Filing: 1985-02-11
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Granted: 1987-01-20
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Expires: 2005-02-11
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Abstract

Abstract A door for refrigerating and freezing chambers, comprising a door frame supporting one or more glass panes for exposing refrigerated or frozen goods in said chamber through the door. According to the invention, the door frame comprises a section (6) capable to support the glass (4) associated with the door (1) along only one vertical edge (7) of the glass (4), at which edge (7) the door (1) is intended to be hingedly suspended in a door case. An inner longitudinal cavity (10) is located along the entire length of the section (6), in which cavity (10) a torsion spring (11) extends substantially along the entire length of the section (6), which torsion spring (11) is capable to be locked at one end relative to the section (6) and at its other end relative to said door case.

Inventors

  • 👤 Torsten Svensson

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 23:05
CPC Classifications
A; A47; A47F; A47F3/00; A47F3/04; A47F3/0404; A47F3/0426; A47F3/043; E; E05; E05F; E05F1/00; E05F1/08; E05F1/10; E05F1/12; E05F1/123; F; F25; F25D; F25D23/00; F25D23/02; F25D23/028; E05Y; E05Y2900/00; E05Y2900/20; E05Y2900/202; E05Y2900/30; E05Y2900/31; F25D2500/00; F25D2500/02

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 264 words
A door for refrigerating and freezer chambers, comprising a door frame, which supports at least one glass pane for exposing through the door refrigerated or frozen goods in said chamber, which door frame at one vertical edge (7), via an elongate first frame section, is intended to be hingedly suspended in a door case (2) and which door frame and door case cooperate with a torsion spring (11) having two ends, said torsion spring (11) being locked at one of its ends relative to the door frame and at the other of its ends relative to the door case, wherein nipples or the like connect to the torsion spring at its upper end (12) and its lower end (13), said nipples or the like, formed as journals (17,18), cooperate with associated bearing means (20, 21) in the door case (2) to thereby pivotally suspend said door; characterized in that means in said door rigidly secure said one vertical edge (7) of said first door frame section (6) to and along only one edge of the glass pane in a U-shaped groove (8) provided along the entire length of said first frame section (6) to provide the sole support for the door; said first frame section comprising an inner longitudinal cavity (10) provided along the entire length of the section, in which cavity said torsion spring extends along substantially the whole length of the section (6); and the remainder of the door frame comprises at least one thin non load bearing strip (25) mounted along each of the remaining three edges of the glass pane.
Claim 2
Dependent Claim 264 words
A door for refrigerating and freezer chambers, comprising a door frame, which supports at least one glass pane for exposing through the door refrigerated or frozen goods in said chamber, which door frame at one vertical edge (7), via an elongate first frame section, is intended to be hingedly suspended in a door case (2) and which door frame and door case cooperate with a torsion spring (11) having two ends, said torsion spring (11) being locked at one of its ends relative to the door frame and at the other of its ends relative to the door case, wherein nipples or the like connect to the torsion spring at its upper end (12) and its lower end (13), said nipples or the like, formed as journals (17,18), cooperate with associated bearing means (20, 21) in the door case (2) to thereby pivotally suspend said door; characterized in that means in said door rigidly secure said one vertical edge (7) of said first door frame section (6) to and along only one edge of the glass pane in a U-shaped groove (8) provided along the entire length of said first frame section (6) to provide the sole support for the door; said first frame section comprising an inner longitudinal cavity (10) provided along the entire length of the section, in which cavity said torsion spring extends along substantially the whole length of the section (6); and the remainder of the door frame comprises at least one thin non load bearing strip (25) mounted along each of the remaining three edges of the glass pane.
Claim 3
Dependent Claim 17 words
A door as defined in claim 1, characterized in that the torsion spring (11) has square cross-section.
Claim 4
Dependent Claim 35 words
A door as defined in claim 1 or 2, characterized in that a handle (5) for opening the door is attached directly to the glass pane located farthest away from the refrigerating or freezing chamber.

References Cited (Backward Citations)

US3507074A Cited
US3629972A Cited
US3780472A Cited
US4145844A Cited
US4223482A Cited
US4378658A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1990-01-19 1990-07-21 1991-01-20 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1994-01-19 1994-07-21 1995-01-20 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1998-01-19 1998-07-21 1999-01-20 $7700.00 Window Closed / Lapsed

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