US3744086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for concealed linked hinges, apt to automatically hold a door, cabinet door or flap door shut
Assignee: Arturo Salice SpA
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Filing: 1971-06-08
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Granted: 1973-07-10
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Expires: 1991-06-08
Abstract
Abstract A device for holding a door shut, incorporated in a concealed hinge embodying the kinematic system for an articualted quadrilateral comprising a V-shaped flexure spring having at its apex an eyelet by which said spring is secured to one of the four pivoting pins of the hinge.
Inventors
- 👤 L Salice
- 👤 S Serin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:29
CPC Classifications
E; E05; E05D; E05D3/00; E05D3/06; E05D3/14; E05D3/142; E05D11/00; E05D11/10; E05D11/1014; E05D11/1021; E05F; E05F1/00; E05F1/08; E05F1/10; E05F1/12; E05F1/1284; E05Y; E05Y2900/00; E05Y2900/20
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
230 words
A device for holding a door shut, incorporated in a concealed hinge comprising: a. fixed carrier means secured to a first surface, b. a first pair of pin means fixedly attached to said carrier, c. first equalizer means pivotally attached to one of said pin means at one end thereof by bi-furcated attaching means, d. second equalizer means pivotally attached to the other of said pin means at one end thereof, e. movable means secured to a second surface and including a recess therein, f. another pair of pin means attached to said movable means and located in said recess, one of said other pair of pin means projecting further into said recess than the other of said other pair of pin means and having said first equalizer means pivotally attached thereto, the other of said other pair of pin means having said second equalizer means pivotally attached thereto, g. a V-shaped flexure spring having an eyelet at the apex and mounted by said eyelet to the one of the first pair of pin means associated with said first equalizer means between the bi-furcated ends of said bi-furcated attaching means, a first leg of said spring interacting with a projection of said second equalizer means acting as a lever with a fulcrum at its first pin means and the second leg of said V-shaped spring interacting with said fixed carrier.
Claim 2
Independent Claim
230 words
A device for holding a door shut, incorporated in a concealed hinge comprising: a. fixed carrier means secured to a first surface, b. a first pair of pin means fixedly attached to said carrier, c. first equalizer means pivotally attached to one of said pin means at one end thereof by bi-furcated attaching means, d. second equalizer means pivotally attached to the other of said pin means at one end thereof, e. movable means secured to a second surface and including a recess therein, f. another pair of pin means attached to said movable means and located in said recess, one of said other pair of pin means projecting further into said recess than the other of said other pair of pin means and having said first equalizer means pivotally attached thereto, the other of said other pair of pin means having said second equalizer means pivotally attached thereto, g. a V-shaped flexure spring having an eyelet at the apex and mounted by said eyelet to the one of the first pair of pin means associated with said first equalizer means between the bi-furcated ends of said bi-furcated attaching means, a first leg of said spring interacting with a projection of said second equalizer means acting as a lever with a fulcrum at its first pin means and the second leg of said V-shaped spring interacting with said fixed carrier.
Claim 3
Dependent Claim
27 words
A device as claimed in claim 1 wherein said second equalizer means includes a block having a sharp edge interacting with said spring and a joint tooth.
Claim 4
Dependent Claim
26 words
A device as claimed in claim 2 wherein said block is of anti-friction material and is secured to said second equalizer means in a cavity therein.
Claim 5
Dependent Claim
34 words
A device as claimed in claim 1 wherein said projection of said second equalizer means is adjacent the first pin associated therewith, and terminates with a sharp edge which interacts with said first spring.
Claim 6
Dependent Claim
25 words
A device, as claimed in claim 1, wherein said V-shaped flexure spring is made of metal strap and both of its free sides are straight.
Claim 7
Dependent Claim
39 words
A device as claimed in claim 1, wherein said V-shaped flexure spring is made of wire, has an intermediate helical coil of a few turns and both of its free sides are straight and each comprise a single branch.
Claim 8
Dependent Claim
61 words
A device as claimed in claim 1, wherein said equalizer having a sharp edge projection and interacting with said V-shaped spring is integrally made and has a tongue formed on its body by a U-shaped cut; said tongue terminating with a sharp but not cutting edge and forming an arm of a lever, of which the other arm is said equalizer.
Claim 9
Dependent Claim
47 words
A device, as claimed in claim 7, wherein said V-shaped spring has an outwardly facing convexity provided by a bending dividing said side in two sections, the V apex facing section of which diverges from the opposite side, while the end section converges to said opposite side.
Claim 10
Dependent Claim
49 words
A device as claimed in claim 7, wherein said V-shaped spring having an eyelet at its apex is made of wire and comprises at least two parallel symmetrical branches interconnected by at least one cross section so as to be made of a single curved and bent wire length.
Claim 11
Dependent Claim
81 words
A device as claimed in claim 7, wherein a slide, made of antifriction material, is interposed between the V-shaped spring and that lever arm of the equalizer on which said spring operates, said slide having a groove for its guidance when sliding along one side of the V-shaped spring and a saddle for receiving the end of the lever arm of the equalizer and allowing an oscillation thereof, said groove and saddle having oblique axes at right angles to each other.
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) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |