Patent US3898708A successfully refreshed from Google Patents.
US3898708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door hinge adjustable closing spring
Assignee: McKinney Manufacturing Co
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Filing: 1974-12-30
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Granted: 1975-08-12
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Expires: 1994-12-30
Abstract
Abstract A hinge pin extends through the overlapping knuckles of a door hinge and has an exposed end portion projecting from one of them. The pin is stationary in one of the knuckles during opening and closing of the hinge. A closing coil spring encircles the projecting end portion of the pin with one end anchored to the pin and the other end anchored in fixed position relative to the other knuckle. The spring is coiled in the direction that will cause it to be wound more tightly during opening of the hinge. An adjustment coil spring tightly encircles the pin inside the knuckle in which the pin is stationary. One end of this spring is free and the other end is anchored to the surrounding knuckle. The adjustment spring is coiled in the direction that will permit the pin to be turned manually in it to wind the closing spring more tightly.
Inventors
- 👤 Joseph W Gwozdz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:01
CPC Classifications
E; E05; E05F; E05F1/00; E05F1/08; E05F1/10; E05F1/12; E05F1/1207; E05F1/1215; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
193 words
A door hinge comprising a jamb leaf having a knuckle, a door leaf having a knuckle above the jamb leaf knuckle and supported by it, a hinge pin extending through said knuckles and having an exposed end portion projecting from one of them, the pin being stationary in one of said knuckles during opening and closing of the hinge, there being relative rotation between the other knuckle and the pin during said opening and closing, a closing coil spring encircling said projecting end portion of the pin and having one end anchored to the pin and having its opposite end anchored in fixed position relative to said other knuckle, the spring being coiled in the direction that will cause it to be wound more tightly during opening of the hinge, and an adjustment coil spring tightly encircling the pin in the knuckle in which the pin is stationary, one end of the adjustment spring being free and the other end being anchored to the surrounding knuckle, and the adjustment spring being coiled in the direction that will permit the pin to be turned manually in it to wind the closing spring more tightly.
Claim 2
Dependent Claim
193 words
A door hinge comprising a jamb leaf having a knuckle, a door leaf having a knuckle above the jamb leaf knuckle and supported by it, a hinge pin extending through said knuckles and having an exposed end portion projecting from one of them, the pin being stationary in one of said knuckles during opening and closing of the hinge, there being relative rotation between the other knuckle and the pin during said opening and closing, a closing coil spring encircling said projecting end portion of the pin and having one end anchored to the pin and having its opposite end anchored in fixed position relative to said other knuckle, the spring being coiled in the direction that will cause it to be wound more tightly during opening of the hinge, and an adjustment coil spring tightly encircling the pin in the knuckle in which the pin is stationary, one end of the adjustment spring being free and the other end being anchored to the surrounding knuckle, and the adjustment spring being coiled in the direction that will permit the pin to be turned manually in it to wind the closing spring more tightly.
Claim 3
Dependent Claim
34 words
A door hinge according to claim 1, in which the projecting end of the hinge pin is provided with a transverse slot, and the adjoining end of said closing spring extends into said slot.
Claim 4
Dependent Claim
28 words
A door hinge according to claim 1, in which said knuckle is provided with a notch, and the adjoining end of the closing spring extends into said notch.
Claim 5
Dependent Claim
35 words
A door hinge according to claim 1, in which said other end of the adjustment spring has a radial projection, and the inside of the encircling knuckle is provided with a recess receiving said projection.
Claim 6
Dependent Claim
22 words
A door hinge according to claim 1, including a hollow cylindrical barrel covering said closing spring and having a closed outer end.
Claim 7
Dependent Claim
33 words
A door hinge according to claim 1, in which the end of the pin opposite the closing spring is provided with a screw driver slot for turning the pin in said adjustment spring.
Claim 8
Dependent Claim
38 words
A door hinge according to claim 1, in which the jamb leaf knuckle is at the bottom of the jamb leaf, said adjustment spring is inside that knuckle, and said closing spring is above the door leaf knuckle.
Claim 9
Dependent Claim
88 words
A door hinge according to claim 7, including a hollow cylindrical barrel enclosing the closing spring and the door leaf knuckle, the door leaf and its knuckle being integrally connected by a connecting portion, said barrel having a slot extending upwardly from its lower end and receiving said connecting portion, the outer diameter of the door leaf knuckle being less than the outer diameter of the other knuckle, and the outer diameter of said barrel being substantially the same as the outer diameter of the jamb leaf knuckle.
Claim 10
Dependent Claim
31 words
A door hinge according to claim 1, in which said surrounding knuckle is provided with a threaded radial opening, and a set screw in said opening bears tightly against the pin.
Claim 11
Dependent Claim
39 words
A door hinge According to claim 1, in which the adjustment spring is coiled in the same direction as the closing spring and it is the upper end of the adjustment spring that is anchored to the surrounding knuckle.
Claim 12
Dependent Claim
18 words
A door hinge according to claim 10, including means for manually reducing the tension on said closing spring.
Claim 13
Dependent Claim
49 words
A door hinge according to claim 11, in which said tension-reducing means include a collar rotatably mounted on the hinge pin in said surrounding knuckle and having a shoulder for pressing against said free end of the adjustment spring to release the grip of that spring on the pin.
Claim 14
Dependent Claim
47 words
A door hinge according to claim 12, in which said surrounding knuckle is provided with a threaded radial opening, said collar is provided with circumferential slot registering with said opening, and a set screw in said opening extends through said slot and bears tightly against the pin.
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) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |