Patent US4640979A successfully refreshed from Google Patents.
US4640979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio-frequency-tight shield with planar parts
Assignee: Siemens AG
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Filing: 1984-07-12
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Granted: 1987-02-03
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Expires: 2004-07-12
Abstract
Abstract An RF shield of electronic devices for example, a covering for electrical equipment which includes frame and panel structures having planar parts characterized by a spring element being assembled on the planar part to insure contact between the part and another part. The spring element has a pair of end portions connected by a center portion which has a convex configuration and the end portions have hook-like portions for securing the spring to the planar part by being inserted in a pair of spaced apertures or for engaging an edge of the part and an edge of an aperture. The hook end portion can extend in the same direction and one portion can include a 180° bend to lock the spring on the part. The convex center portion can be a smooth convex curve or it can be a sharp triangular-shaped bend.
Inventors
- 👤 Dieter Schmalzl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:38
CPC Classifications
H; H05; H05K; H05K9/00; H05K9/0007; H05K9/0015; H05K9/0016
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
117 words
In a radio-frequency-tight shield for electronic devices, said shield including a frame and panel structure with planar parts, the improvement comprising one of the planar parts having at least one spring element being assembled thereon, said spring element having a center contact portion extending between two end portions, said end portions being bent to form hook-shaped sections for engaging spaced edges formed on the one planar part, said spring being assembled on the one planar part with the center contact portion extending beyond a surface of the one planar part and the hook-shaped sections of the end portions engaging said edges and forming detents to prevent the spring element from becoming removed from the one planar part.
Claim 2
Dependent Claim
117 words
In a radio-frequency-tight shield for electronic devices, said shield including a frame and panel structure with planar parts, the improvement comprising one of the planar parts having at least one spring element being assembled thereon, said spring element having a center contact portion extending between two end portions, said end portions being bent to form hook-shaped sections for engaging spaced edges formed on the one planar part, said spring being assembled on the one planar part with the center contact portion extending beyond a surface of the one planar part and the hook-shaped sections of the end portions engaging said edges and forming detents to prevent the spring element from becoming removed from the one planar part.
Claim 3
Dependent Claim
60 words
In a radio-frequency-tight shield according to claim 1, wherein said spaced edges of the one planar part are formed by spaced apertures in the one planar part, the center contact portion has a convex configuration and each of the hook-shaped sections of the end portions has a Z-shape which sections are axially symmetrical and are inserted into the shaped apertures.
Claim 4
Dependent Claim
76 words
In a radio-frequency-tight shield according to claim 1, wherein the spaced edges of the one planar part are formed by spaced apertures in the one planar part, the end sections being inserted into the apertures, the center contact portion has a convex configuration and one of said end sections has a Z shape and the other of the end sections has a reversed bend, said end sections are isodirectionally oriented and have an obliquely extending ends.
Claim 5
Dependent Claim
45 words
In a radio-frequency-tight shield according to claim 1, wherein one of the end portions has a reverse bend of 180° so that a leg of the one end portion extends alongside the center contact portion to prevent disengagement of the spring from the planar part.
Claim 6
Dependent Claim
89 words
In a radio-frequency-tight shield according to claim 1, wherein said spaced edges are formed by spaced apertures in the one planar part, said end portions extend through the apertures to engage said edges, one of the end portions having a reversed bend so both of the end portions extend isodirectionally and extend parallel to a surface of the one planar part with the one end portion having a tab bent to engage an edge of the aperture of the one planar part through which the other end portion extends.
Claim 7
Dependent Claim
91 words
A spring element for use in a radio-frequency shield comprising a center contact portion extending between two end portions, one of the two end portions having three bends to form a Z-shaped hook section terminating in an end tab, the other of the two end portions having a reversed bend with a leg terminating in an end tab, said leg and Z-shaped hook section being isodirectionally oriented with the end tabs extending obliquely thereto and said contact center portion being curved outwardly away from a plane formed by said end portions.
Claim 8
Dependent Claim
91 words
A spring element for use in a radio-frequency shield comprising a center contact portion extending between two end portions, one of the two end portions having three bends to form a Z-shaped hook section terminating in an end tab, the other of the two end portions having a reversed bend with a leg terminating in an end tab, said leg and Z-shaped hook section being isodirectionally oriented with the end tabs extending obliquely thereto and said contact center portion being curved outwardly away from a plane formed by said end portions.
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) | 1990-02-02 | 1990-08-04 | 1991-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-02 | 1994-08-04 | 1995-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-02 | 1998-08-04 | 1999-02-03 | $7700.00 | Window Closed / Lapsed |