US4068344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door hinge mechanism
Assignee: Individual
•
Filing: 1976-10-21
•
Granted: 1978-01-17
•
Expires: 1996-10-21
Abstract
Abstract A door hinge device applicable to a door, comprising a pair of flanges, a cylinder connected to one of these flanges and housed with a pair of pistons, a valve means formed on one of the pistons, a partition mounted between the flanges, an orifice formed on the partition, and a driving mechanism mounted externally of the cylinder, wherein the antiflow valve means is opened when the flanges move in the direction to open the door, but when they move in reverse direction to close the door, the valve means of the piston controllably permits a desired quantity of working oil to flow therethrough.
Inventors
- 👤 Chiyo Okabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:41
CPC Classifications
E; E05; E05F; E05F3/00; E05F3/20; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
190 words
A door hinge mechanism comprising a pair of flanges each fixedly mounted on a door and a means for fixedly mounting said mechanism on said door, one of said flanges being connected to a cylinder while the other is connected to a supporting means in pivotally supported relation with respect to said cylinder, a pair of pistons mounted internally of said cylinder at a suitably spaced apart interval, a working oil filled in said pair of pistons, a movable means mounted externally of said pistons to move the latter in upward and downward directions along with the relatively opening and closing motions of said flanges, a partition mounted between said pistons, an orifice and a reversely stopping valve means formed on said partition, said valve means being adapted to be released when said flanges are moved in the opening direction thereof, a valve means formed on one of said pistons reciprocable through said orifice of the partition thereby to control the quantity of working oil to be fed through said orifice during the latter half process wherein said pair of pistons have moved in the closing direction of said flanges.
Claim 2
Dependent Claim
190 words
A door hinge mechanism comprising a pair of flanges each fixedly mounted on a door and a means for fixedly mounting said mechanism on said door, one of said flanges being connected to a cylinder while the other is connected to a supporting means in pivotally supported relation with respect to said cylinder, a pair of pistons mounted internally of said cylinder at a suitably spaced apart interval, a working oil filled in said pair of pistons, a movable means mounted externally of said pistons to move the latter in upward and downward directions along with the relatively opening and closing motions of said flanges, a partition mounted between said pistons, an orifice and a reversely stopping valve means formed on said partition, said valve means being adapted to be released when said flanges are moved in the opening direction thereof, a valve means formed on one of said pistons reciprocable through said orifice of the partition thereby to control the quantity of working oil to be fed through said orifice during the latter half process wherein said pair of pistons have moved in the closing direction of said flanges.
Claim 3
Dependent Claim
45 words
The door hinge mechanism, as set forth in claim 1, wherein said movable means for moving said pistons upwardly and downwardly are each adapted to move one of said pistons by means of cam mechanism while the other is moved by means of a spring.
Claim 4
Dependent Claim
29 words
The door hinge mechanism, as set forth in claim 1, wherein said movable means for moving said pair of pistons upwardly and donwwardly are each composed of cam mechanisms.
Claim 5
Dependent Claim
47 words
The door hinge mechanism, as set forth in claim 1, wherein said movable means for moving said pistons upwardly and downwardly are each adapted to move one of said pistons by means of a screwably engageable structures while the other is moved by means of a spring.
Claim 6
Dependent Claim
29 words
The door hinge mechanism, as set forth in claim 1, wherein said movable means for moving said pistons upwardly and downwardly are each composed of said screwably engageable structures.
Claim 7
Dependent Claim
48 words
The door hinge mechanism, as set forth in claim 1, wherein said movable means for moving said pistons upwardly and downwardly are each adapted to move one of said pistons by means of said screwably engageable structures while the other is moved by means of a cam mechanism.
Claim 8
Dependent Claim
41 words
The door hinge mechanism, as set forth in claim 1, wherein the quantity of working oil to be fed into said orifice of said partition through said valve means is controlled by changing the cross-sectional surface are of said valve means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-16 | 1981-07-18 | 1982-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-16 | 1985-07-18 | 1986-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-16 | 1989-07-18 | 1990-01-17 | $7700.00 | Window Closed / Lapsed |