Patent US4540235A successfully refreshed from Google Patents.
US4540235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double flat spring contact provided with an over-spring
Assignee: Grote and Hartmann GmbH and Co KG
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Filing: 1983-11-14
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Granted: 1985-09-10
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Expires: 2003-11-14
Abstract
Abstract A double flat spring contact provided with an over-spring, in which the double flat spring contact includes connecting elements for an electrical conductor wire and a box-shaped spring arm base which is rectangular in cross section to define a bottom, side walls and a pair of longitudinally divided top cover parts. A spring arm extends forward from each cover part and a pair of spring arms are also connected to the bottom. An external over-spring is seated about in an enclosed arrangement on the spring arm base to be unreleasably secured thereon. The external over-spring includes a box-shaped external over-spring arm base, which is also rectangular in cross section. Connected to and extending forward from the over-spring arm base are over-spring clamp arms that run parallel to the spring arms of the double flat spring contact. The clamp arms press inwardly upon outer surfaces of the spring arms.
Inventors
- 👤 Srboslav Lolic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:42
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/02; H01R13/10; H01R13/11; H01R13/15; H01R13/18; H01R13/113
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
250 words
A double flat spring contact provided with an over-spring, comprising: said double flat spring contact including connecting elements for an electrical conductor wire and a box-shaped spring arm base, said spring arm base being rectangular in cross section to provide a base bottom, opposing side walls and a pair of longitudinally divided top cover parts; a spring arm extending forward from each cover part; a pair of spring arms connected to a forward portion of said base bottom; each of said cover parts being provided with a cut out having a right angle to provide a cut-out longitudinal edge and a cut-out transverse edge; an external over-spring including a box-shaped external over-spring arm base member having a rectangular cross section; over-spring clamp arms connected to and extending forward from said over-spring arm base member; said external over-spring being seated about in an enclosed arrangement on said spring contact with said over-spring arm base member being mounted on said spring arm base, and said clamp arms running parallel to associated ones of said spring arms of said double flat spring contact respectively, and with said clamp arms pressing inwardly upon respective outer surfaces of said associated spring arms; and securing means joining said over-spring arm base member to said spring arm base of said spring contact to provide an unreleasable securement of said external over-spring on said spring contact; securing means extending into each said cut out of said cover parts of said spring arm base to provide said unreleasable securement.
Claim 2
Dependent Claim
250 words
A double flat spring contact provided with an over-spring, comprising: said double flat spring contact including connecting elements for an electrical conductor wire and a box-shaped spring arm base, said spring arm base being rectangular in cross section to provide a base bottom, opposing side walls and a pair of longitudinally divided top cover parts; a spring arm extending forward from each cover part; a pair of spring arms connected to a forward portion of said base bottom; each of said cover parts being provided with a cut out having a right angle to provide a cut-out longitudinal edge and a cut-out transverse edge; an external over-spring including a box-shaped external over-spring arm base member having a rectangular cross section; over-spring clamp arms connected to and extending forward from said over-spring arm base member; said external over-spring being seated about in an enclosed arrangement on said spring contact with said over-spring arm base member being mounted on said spring arm base, and said clamp arms running parallel to associated ones of said spring arms of said double flat spring contact respectively, and with said clamp arms pressing inwardly upon respective outer surfaces of said associated spring arms; and securing means joining said over-spring arm base member to said spring arm base of said spring contact to provide an unreleasable securement of said external over-spring on said spring contact; securing means extending into each said cut out of said cover parts of said spring arm base to provide said unreleasable securement.
Claim 3
Dependent Claim
53 words
A double flat spring contact according to claim 1, wherein associated ones of said spring arms are each bent inward toward each other from a first bend line and touch each other at a second bend line with end portions of said associated spring arms running divergently apart to provide an entry funnel.
Claim 4
Dependent Claim
53 words
A double flat spring contact according to claim 2, wherein associated ones of said over-spring clamp arms are each bent inward toward each other at a third bend line, and end portions of said associated clamp arms are bent further inward toward each other at a fourth bend line with a spacing therebetween.
Claim 5
Dependent Claim
46 words
A double flat spring contact according to claim 1, wherein said clamp arms and said spring arms have substantially equal widths, said clamp arms being shorter than said spring arms to press said respective outer surfaces before a bend line in each of said spring arms.
Claim 6
Dependent Claim
23 words
A double flat spring contact according to claim 4, wherein associated ones of said spring arms touch each other at said bend line.
Claim 7
Dependent Claim
70 words
A double flat spring contact according to claim 1, wherein side edges of said over-spring arm base member are provided with short incisions running parallel to a rear edge of said over-spring arm base member to provide two tabs thereon, said two tabs being bent inward with each tab point extending into an associated cut out of said cover parts of said spring arm base to provide said securing means.
Claim 8
Dependent Claim
114 words
A double flat spring contact according to claim 6, wherein cut-throughs are provided in said over-spring arm base member, said cut-throughs running parallel to a front edge of each side wall section of said over-spring arm base member to provide a narrow arresting strip in each said side wall section, each said arresting strip being pressed inward to engage an associated front edge of each of said side walls of said spring arm base of said double flat spring contact to provide additional securing means for joining said over-spring arm base member to said spring arm base of said spring contact to provide said unreleasable securement of said external over-spring on said spring contact.
Claim 9
Dependent Claim
53 words
A double flat spring contact according to claim 7, wherein associated ones of said spring arms are each bent inward toward each other from a first bend line and touch each other at a second bend line with end portions of said associated spring arms running divergently apart to provide an entry funnel.
Claim 10
Dependent Claim
53 words
A double flat spring contact according to claim 8, wherein associated ones of said over-spring clamp arms are each bent inward toward each other at a third bend line, and end portions of said associated clamp arms are bent further inward toward each other at a fourth bend line with a spacing therebetween.
Claim 11
Dependent Claim
46 words
A double flat spring contact according to claim 7, wherein said clamp arms and said spring arms have substantially equal widths, said clamp arms being shorter than said spring arms to press said respective outer surfaces before a bend line in each of said spring arms.
Claim 12
Dependent Claim
23 words
A double flat spring contact according to claim 10, wherein associated ones of said spring arms touch each other at said bend line.
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) | 1988-09-09 | 1989-03-11 | 1989-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-09 | 1993-03-11 | 1993-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-09 | 1997-03-11 | 1997-09-10 | $7700.00 | Window Closed / Lapsed |