Patent US3787923A successfully refreshed from Google Patents.
US3787923A
Expired / Lapsed
US
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Hinge with torsion bar
Assignee: Hager C & Sons Hinge Manufacturing Co us
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Filing: 1972-01-17
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Granted: 1974-01-29
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Expires: 1992-01-17
Abstract
Abstract A torsion bar is provided within a hinge having leaves which fit on the same door as leaves presently used in this country, so as to bias the door toward a closed or open position. The torsion bar is mounted within a tubular pivot pin portion of the upper knuckle and the lower portion of the lower knuckle. The plugs do not extend above the upper knuckle or below the lower knuckle. The torsion bar is made from a plurality of thin spring steel members of predetermined length, which are connected together by bands. The ends of the torsion bar fit within slots in the inner ends of said plugs, which inner ends fit within the tubular pivot pin.
Inventors
- 👤 F Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:00
CPC Classifications
E; E05; E05F; E05F1/00; E05F1/08; E05F1/10; E05F1/12; E05F1/123; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
187 words
A hinge having a pair of hinge leaves, each of said leaves having a knuckle thereon, said knuckles each having an opening therein aligned with an opening in the other knuckle, a tubular pivot pin extending into each opening of said knuckles, said tubular pin having an opening therethrough, a plug mounted within each end of said aligned knuckles, each of said plugs being identical and positioned within a knuckle, each of said plugs having an outer surface substantially flush with the outer end of the knuckle in which said plug is positioned, said outer surface having an opening therein for receiving a tool, each of said plugs having an inner portion with a slot therein, a torsion bar made from a plurality of thin twistable metal strips which are shorter in length than the combined length of said knuckles and which are longer in length than the height of the base portions of said leaves, said torsion bar haVing ends each of which is mounted within said slot in the inner portion of said plugs, and means for preventing rotation of said plugs within said knuckles.
Claim 2
Dependent Claim
187 words
A hinge having a pair of hinge leaves, each of said leaves having a knuckle thereon, said knuckles each having an opening therein aligned with an opening in the other knuckle, a tubular pivot pin extending into each opening of said knuckles, said tubular pin having an opening therethrough, a plug mounted within each end of said aligned knuckles, each of said plugs being identical and positioned within a knuckle, each of said plugs having an outer surface substantially flush with the outer end of the knuckle in which said plug is positioned, said outer surface having an opening therein for receiving a tool, each of said plugs having an inner portion with a slot therein, a torsion bar made from a plurality of thin twistable metal strips which are shorter in length than the combined length of said knuckles and which are longer in length than the height of the base portions of said leaves, said torsion bar haVing ends each of which is mounted within said slot in the inner portion of said plugs, and means for preventing rotation of said plugs within said knuckles.
Claim 3
Dependent Claim
214 words
A hinge having a pair of hinge leaves, each of said leaves having a knuckle thereon, said knuckles each having an opening therein aligned with an opening in the other knuckle, a tubular pivot pin extending into each opening of said knuckles, said tubular pivot pin having an opening therethrough, a plug mounted within each end of said aligned knuckles, each of said plugs being identical and positioned within a knuckle, each of said plugs having an outer surface substantially flush with the outer end of the knuckle in which said plug is positioned, said outer surface having an opening therein for receiving a tool, each of said plugs having an inner portion with a slot therein, a torsion bar made from a plurality of twistable metal strips, said torsion bar having ends each of which is mounted within said slot in the inner portion of said plugs, and means for preventing rotation of said plugs within said knuckles, said plugs having inner shoulders and said tubular pivot pin having ends, said ends of said tubular pivot pin being in abutting relation with said inner shoulders of said plugs when said hinge is in assembled relation, and wherein the height of said tubular pivot pin is greater than the height of said torsion bar.
Claim 4
Dependent Claim
214 words
A hinge having a pair of hinge leaves, each of said leaves having a knuckle thereon, said knuckles each having an opening therein aligned with an opening in the other knuckle, a tubular pivot pin extending into each opening of said knuckles, said tubular pivot pin having an opening therethrough, a plug mounted within each end of said aligned knuckles, each of said plugs being identical and positioned within a knuckle, each of said plugs having an outer surface substantially flush with the outer end of the knuckle in which said plug is positioned, said outer surface having an opening therein for receiving a tool, each of said plugs having an inner portion with a slot therein, a torsion bar made from a plurality of twistable metal strips, said torsion bar having ends each of which is mounted within said slot in the inner portion of said plugs, and means for preventing rotation of said plugs within said knuckles, said plugs having inner shoulders and said tubular pivot pin having ends, said ends of said tubular pivot pin being in abutting relation with said inner shoulders of said plugs when said hinge is in assembled relation, and wherein the height of said tubular pivot pin is greater than the height of said torsion bar.
Claim 5
Dependent Claim
267 words
A hinge having a pair of identical hinge leaves, each of said leaves having a base portion and a knuckle thereon, said knuckles each having an opening therein aligned with an opening in the other knuckle, a tubular pivot pin extending into each opening of said knuckles, said tubular pivot pin having an opening therethrough, a plug mounted within each end of said aligned knuckles, each of said plugs being identical and positioned within a knuckle, each of said plugs having an outer surface substantially flush with the outer end of the knuckle in which said plug is positioned, said outer surface having an opening therein for receiving a tool, each of said plugs having an inner portion with a slot therein, a torsion bar made from a plurality of twistable metal strips, said torsion bar having ends each of which is mounted within said slot in the inner portion of said plugs, and means for preventing rotation of said plugs within said knuckles, said knuckles on said hinge leaves extending above the top edge of the base portions of said leaves and below the bottom edge of the base portions of said leaves, so that the combined height of said knuckles is greater than the height of a hinge leaf, said knuckles being tubular in cross-section, said identical leaves each having a base portion which is flat, said knuckles being welded to base portions along one half of a vertical edge of each of said base portions, said knuckles each being shorter in height than the height of the base portion to which it is secured.
Claim 6
Dependent Claim
267 words
A hinge having a pair of identical hinge leaves, each of said leaves having a base portion and a knuckle thereon, said knuckles each having an opening therein aligned with an opening in the other knuckle, a tubular pivot pin extending into each opening of said knuckles, said tubular pivot pin having an opening therethrough, a plug mounted within each end of said aligned knuckles, each of said plugs being identical and positioned within a knuckle, each of said plugs having an outer surface substantially flush with the outer end of the knuckle in which said plug is positioned, said outer surface having an opening therein for receiving a tool, each of said plugs having an inner portion with a slot therein, a torsion bar made from a plurality of twistable metal strips, said torsion bar having ends each of which is mounted within said slot in the inner portion of said plugs, and means for preventing rotation of said plugs within said knuckles, said knuckles on said hinge leaves extending above the top edge of the base portions of said leaves and below the bottom edge of the base portions of said leaves, so that the combined height of said knuckles is greater than the height of a hinge leaf, said knuckles being tubular in cross-section, said identical leaves each having a base portion which is flat, said knuckles being welded to base portions along one half of a vertical edge of each of said base portions, said knuckles each being shorter in height than the height of the base portion to which it is secured.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |