US5545843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contact spring
Assignee: Telefonaktiebolaget LM Ericsson AB
•
Filing: 1995-04-05
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Granted: 1996-08-13
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Expires: 2015-04-05
Abstract
Abstract A contact spring for securing a component having a flange-like edge to a substrate, for instance for securing a cooling screen or shield to a circuit board, includes an elongated profiled part that is generally U-shaped in cross section for surface-mounting on the substrate. A first leg of the U-shaped profiled part is substantially straight and extends continuously along the contact spring. The second leg of the U-shaped profiled part has tongues whose upper extremities are bent inwardly towards the bottom of the profiled part. Alternate tongues on the second leg are angled to form a fork-like contact with the first leg. The other tongues on the second leg are semicircular and extend approximately half way above the bottom of the profiled part.
Inventors
- 👤 Stig A. Arvidsson
- 👤 Bo U. E. Henningsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:23
CPC Classifications
H; H05; H05K; H05K9/00; H05K9/0007; H05K9/0015; H05K9/0016
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
119 words
A contact spring for securing to a substrate a component having a flange, comprising an elongated profiled part having a generally U-shaped cross section, wherein a first leg of the U-shaped profiled part is substantially straight and extends continuously along the contact spring; a second leg of the U-shape profiled part has tongues whose upper extremities are bent inwardly towards the first leg and downwardly towards the bottom of the profiled part; at least one of said tongues on the second leg is angled to form an acute angle with the first leg; and at least one other of said tongues on the second leg is semicircular and extends approximately half way above the bottom of the profiled part.
Claim 2
Dependent Claim
119 words
A contact spring for securing to a substrate a component having a flange, comprising an elongated profiled part having a generally U-shaped cross section, wherein a first leg of the U-shaped profiled part is substantially straight and extends continuously along the contact spring; a second leg of the U-shape profiled part has tongues whose upper extremities are bent inwardly towards the first leg and downwardly towards the bottom of the profiled part; at least one of said tongues on the second leg is angled to form an acute angle with the first leg; and at least one other of said tongues on the second leg is semicircular and extends approximately half way above the bottom of the profiled part.
Claim 3
Dependent Claim
18 words
The contact spring of claim 1, wherein the first leg has convex projections for punctiformly abutting the component.
Claim 4
Dependent Claim
42 words
The contact spring of claim 1, wherein the bottom of the U-shaped profiled part has solder pads for soldering to the substrate, the solder pads being delimited by holes in the bottom of the U-shaped profiled part and located opposite the tongues.
Claim 5
Dependent Claim
21 words
The contact spring of claim 1, wherein the upper edge of the first leg is angled away from the second leg.
Claim 6
Dependent Claim
39 words
The contact spring of claim 1, wherein a vertex of the acute angle formed by the first leg and said at least one of said tongues on the second leg is located approximately half way up the first leg.
Claim 7
Dependent Claim
137 words
Interconnected circuit board components comprising: a substrate; a component having a flange; a contact spring for securing the component having a flange to the substrate, the contact spring including an elongated profiled part having a generally U-shaped cross section, wherein a first leg of the U-shaped profiled part is substantially straight and extends continuously along both the contact spring and the component; a second leg of the U-shape profiled part has tongues whose upper extremities are bent inwardly towards the first leg and downwardly towards the bottom of the profiled part, at least one of said tongues on the second leg is angled to form an acute angle with the first leg, and at least one of said tongues on the second leg is semicircular and extends approximately half way above the bottom of the profiled part.
Claim 8
Dependent Claim
137 words
Interconnected circuit board components comprising: a substrate; a component having a flange; a contact spring for securing the component having a flange to the substrate, the contact spring including an elongated profiled part having a generally U-shaped cross section, wherein a first leg of the U-shaped profiled part is substantially straight and extends continuously along both the contact spring and the component; a second leg of the U-shape profiled part has tongues whose upper extremities are bent inwardly towards the first leg and downwardly towards the bottom of the profiled part, at least one of said tongues on the second leg is angled to form an acute angle with the first leg, and at least one of said tongues on the second leg is semicircular and extends approximately half way above the bottom of the profiled part.
Claim 9
Dependent Claim
18 words
The contact spring of claim 6, wherein the first leg has convex projections for punctiformly abutting the component.
Claim 10
Dependent Claim
42 words
The contact spring of claim 6, wherein the bottom of the U-shaped profiled part has solder pads for soldering to the substrate, the solder pads being delimited by holes in the bottom of the U-shaped profiled part and located opposite the tongues.
Claim 11
Dependent Claim
21 words
The contact spring of claim 6, wherein the upper edge of the first leg is angled away from the second leg.
Claim 12
Dependent Claim
37 words
The contact spring of claim 6, wherein a vertex of the acute angle formed by the first leg and said at least one tongue on the second leg is located approximately half way up the first leg.
Claim 13
Dependent Claim
20 words
The contact spring of claim 6, wherein the component is a cooling shield and the substrate is a circuit board.
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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) | 1999-08-13 | 2000-02-12 | 2000-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-08-13 | 2004-02-12 | 2004-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-08-13 | 2008-02-12 | 2008-08-13 | $7700.00 | Window Closed / Lapsed |