US4660418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible hinge device
Assignee: International Standard Electric Corp
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Filing: 1984-09-17
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Granted: 1987-04-28
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Expires: 2004-09-17
Abstract
Abstract A flexible hinge device comprises a laminar silicon body having a groove portion etched away to define a thin flexible strip joining two rigid end portions. The silicon forming the hinge is usually of a single crystal structure. Break-off supports may be provided to support the structure prior to use.
Inventors
- 👤 John C. Greenwood
- 👤 David Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:47
CPC Classifications
G; G01; G01P; G01P1/00; E; E05; E05D; E05D1/00; E05D1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
A unitary flexible hinge device comprising a laminar body of single crystal silicon having a hinge groove etched therein extending in an uninterrupted straight line manner across said body between a pair of opposite edges thereof, dividing said body into two rigid body portions on opposite sides of said hinge groove, said hinge groove having a depth forming a substantially thin flat hinge groove bottom connecting said two rigid body portions, said hinge groove bottom being flexible along the entire length of said groove, said body includes two additional grooves each extending transverse to said hinge groove in an interrupted straight line manner across a respective one of said pair of body portions between a second pair of opposite edges thereof forming a pair of support portions each extending across said hinge groove rigidly connecting said two body portions together, each said support portion being removable from said body portions at said two additional grooves.
Claim 2
Dependent Claim
155 words
A unitary flexible hinge device comprising a laminar body of single crystal silicon having a hinge groove etched therein extending in an uninterrupted straight line manner across said body between a pair of opposite edges thereof, dividing said body into two rigid body portions on opposite sides of said hinge groove, said hinge groove having a depth forming a substantially thin flat hinge groove bottom connecting said two rigid body portions, said hinge groove bottom being flexible along the entire length of said groove, said body includes two additional grooves each extending transverse to said hinge groove in an interrupted straight line manner across a respective one of said pair of body portions between a second pair of opposite edges thereof forming a pair of support portions each extending across said hinge groove rigidly connecting said two body portions together, each said support portion being removable from said body portions at said two additional grooves.
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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) | 1990-04-27 | 1990-10-27 | 1991-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-27 | 1994-10-27 | 1995-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-27 | 1998-10-27 | 1999-04-28 | $7700.00 | Window Closed / Lapsed |