US5239731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hinge device for casings
Assignee: Individual
•
Filing: 1992-06-03
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Granted: 1993-08-31
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Expires: 2012-06-03
Abstract
Abstract A hinge device for a casing of the type having a body portion and an upper cover includes a substantially L-shaped mount plate adapted to be securely mounted to the body portion of the casing, a sleeve attached to a first side of the mount plate, a pivotal axle having a conic portion thereof received in the sleeve and a flange portion against the sleeve, a spring, and a nut mounted on the pivotal shaft and located on a second side of the mount plate. The nut biases the spring allowing the pivotal axle to be freely pivotable relative to the spring. When a desired position of the upper cover relative to the body portion of the casing is reached, the spring biased by the nut exerts a longitudinal force on the pivotal axle to retain the pivotal axle in position.
Inventors
- 👤 Sheng N. Lu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:29
CPC Classifications
E; E05; E05D; E05D11/00; E05D11/08; E05D11/081; E05Y; E05Y2999/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
271 words
A hinge device for a casing having a body portion and an upper cover, comprising: a substantially L-shaped mount plate having a vertical portion with a hole and a horizontal portion adapted to be securely mounted to said body portion of said casing; a sleeve having a conic hole extending along a longitudinal direction thereof, said sleeve being attached to a first side of said vertical portion with said conic hole thereof aligning with said hole; a pivotal axle comprising a mounting portion located at said first side of said vertical portion and adapted to be securely mounted to said upper cover of said casing, a flange portion also located at said first side of said vertical portion, a conic portion extending from said flange portion and being fittingly and pivotally received in said conic hole of said sleeve, and an extension extending from said conic portion at a second side of said vertical portion and having a threaded end portion; a washer attached to said second side of said vertical portion of said mount plate; spring mounted around said extension of said pivotal axle; and a nut mounted on said threaded end portion of said extension to bias said spring between said nut and said gasket; whereby said pivotal axle is freely pivotable relative to said spring, and when a desired position of said upper cover relative to said body portion of said casing is reached, said spring biased by said nut exerts a longitudinal force on said pivotal axle, such that said flange portion of said pivotal axle is against said sleeve, thereby retaining said pivotal axle in position.
Claim 2
Dependent Claim
271 words
A hinge device for a casing having a body portion and an upper cover, comprising: a substantially L-shaped mount plate having a vertical portion with a hole and a horizontal portion adapted to be securely mounted to said body portion of said casing; a sleeve having a conic hole extending along a longitudinal direction thereof, said sleeve being attached to a first side of said vertical portion with said conic hole thereof aligning with said hole; a pivotal axle comprising a mounting portion located at said first side of said vertical portion and adapted to be securely mounted to said upper cover of said casing, a flange portion also located at said first side of said vertical portion, a conic portion extending from said flange portion and being fittingly and pivotally received in said conic hole of said sleeve, and an extension extending from said conic portion at a second side of said vertical portion and having a threaded end portion; a washer attached to said second side of said vertical portion of said mount plate; spring mounted around said extension of said pivotal axle; and a nut mounted on said threaded end portion of said extension to bias said spring between said nut and said gasket; whereby said pivotal axle is freely pivotable relative to said spring, and when a desired position of said upper cover relative to said body portion of said casing is reached, said spring biased by said nut exerts a longitudinal force on said pivotal axle, such that said flange portion of said pivotal axle is against said sleeve, thereby retaining said pivotal axle in position.
Claim 3
Dependent Claim
79 words
The hinge device as claimed in claim 1, further comprising a restraining member provided to an inner side of said nut, said restraining member having a protrusion projecting from an outer periphery thereof, and a stop extending from said vertical portion of said mount plate, such that when said upper cover of said casing is opened to a pre-set maximum angle relative to said body portion of said casing, said protrusion contacts with and is stopped by said stop.
Claim 4
Dependent Claim
28 words
The hinge device as claimed in claim 2, wherein two oil gaps are formed in an outer periphery of said conic portion to provide a smooth pivotal movement.
Claim 5
Dependent Claim
36 words
The hinge device as claimed in claim 2, wherein a plurality of oil holes are provided in said washer to provide a smooth contact surface between said washer and said vertical portion of said mount plate.
Claim 6
Dependent Claim
32 words
The hinge device as claimed in claim 1, further comprising a gasket provided in said nut around said threaded end portion to provide an assist to retain said pivotal axle in position.
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) | 1996-08-30 | 1997-03-01 | 1997-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-08-30 | 2001-03-01 | 2001-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-08-30 | 2005-03-01 | 2005-08-31 | $7700.00 | Window Closed / Lapsed |