Patent US4720609A successfully refreshed from Google Patents.
US4720609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pushbutton switch device
Assignee: Preh GmbH
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Filing: 1986-10-10
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Granted: 1988-01-19
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Expires: 2006-10-10
Abstract
Abstract A pushbutton switch device has a flat carrier having first and second swi contacts and a switch button arrangement for actuation of the first and second switch contacts. In order that the first and second switch contacts are switched in succession, the switch contacts to be actuated by a switch knob of the switch button arrangement are placed next to one another on the flat carrier. An insert having first and second switching surface parts corresponding to the first and second switch contacts respectively, is placed between the switch knob and the first and second switch contact. Upon initial actuation of the switch knob, the insert closes the first switch contact. Upon continued actuation of the switch knob, the insert will close the second switch contact.
Inventors
- 👤 Gerhard Hochgesang
- 👤 Jurgen Oelsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:48
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/70; H01H13/702; H01H13/705; H01H2215/00; H01H2215/004; H01H2215/006; H01H2225/00; H01H2225/006; H01H2225/018; H01H2237/00; H01H2237/004
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
225 words
A pushbutton switch device comprising at least one switch element, said switch element comprising a switch chamber defined between first and second elastic foils having a space therebetween, two electrically independent contacts protruding from each of said foils into said switch chamber, each of said contacts protruding from said first foil opposing one of said electrically independent contacts protruding from said second foil, said electrically independent contacts forming a first and second contact pair respectively, a switch button arrangement comprising a switch knob arranged for actuation of said first and second switch contact pairs, wherein the stroke of said switch knob needed to actuate said second switch contact pair is greater than the stroke needed for actuation of said first contact pair, and a spring elastic insert placed between the switch knob and one of the foils defining the switch chamber, said insert having an inner region, an outer region, an edge region, a first web and a second web, said inner region and said outer region being connected by said first web, said outer region and said edge region being connected by said second web, such that when said switch knob acts upon said insert, said inner region actuates said first switch contact pair, and upon further acting of said switch knob upon said insert, said inner region actuates said second switch contact pair.
Claim 2
Dependent Claim
225 words
A pushbutton switch device comprising at least one switch element, said switch element comprising a switch chamber defined between first and second elastic foils having a space therebetween, two electrically independent contacts protruding from each of said foils into said switch chamber, each of said contacts protruding from said first foil opposing one of said electrically independent contacts protruding from said second foil, said electrically independent contacts forming a first and second contact pair respectively, a switch button arrangement comprising a switch knob arranged for actuation of said first and second switch contact pairs, wherein the stroke of said switch knob needed to actuate said second switch contact pair is greater than the stroke needed for actuation of said first contact pair, and a spring elastic insert placed between the switch knob and one of the foils defining the switch chamber, said insert having an inner region, an outer region, an edge region, a first web and a second web, said inner region and said outer region being connected by said first web, said outer region and said edge region being connected by said second web, such that when said switch knob acts upon said insert, said inner region actuates said first switch contact pair, and upon further acting of said switch knob upon said insert, said inner region actuates said second switch contact pair.
Claim 3
Dependent Claim
22 words
A pushbutton switch device according to claim 1, characterized in that said outer region encloses said inner region in an annular manner.
Claim 4
Dependent Claim
25 words
A pushbutton switch device according to claim 1, characterized in that said first and second webs are offset by approximately 180° on said outer region.
Claim 5
Dependent Claim
48 words
A pushbutton switch device according to claim 1, characterized in that said insert further comprises a projection extending towards said switch knob, said projection formed on said inner region of said insert, such that said switch knob will strike said projection when said switch knob is acted upon.
Claim 6
Dependent Claim
45 words
A pushbutton switch device according to claim 4, characterized in that said switch knob further comprises a switch knob projection extending towards said insert, such that said switch knob projection will strike the inner region of said insert when said switch knob is acted upon.
Claim 7
Dependent Claim
45 words
A pushbutton switch device according to claim 1, characterized in that said switch knob further comprises a switch knob projection extending towards said insert, such that said switch knob projection will strike the inner region of said insert when said switch knob is acted upon.
Claim 8
Dependent Claim
18 words
A pushbutton switch device according to claim 1, characterized in that said insert is made of spring-elastic plastic.
Claim 9
Dependent Claim
30 words
A pushbutton switch device according to claim 2, characterized in that said insert is made of electrically conductive material, said insert acting as an additional contact with said first foil.
Claim 10
Dependent Claim
41 words
A pushbutton switch according to claim 1, characterized in that said swich element further comprises a spacer foil having cutouts and said insert further comprises at least one finger such that said at least one finger engages said spacer foil cutouts.
Claim 11
Dependent Claim
22 words
A pushbutton switch device according to claim 1, characterized in that said switch button arrangement further comprises a dimensionally stable carrier plate.
Claim 12
Dependent Claim
22 words
A pushbutton switch device according to claim 1, characterized in that said pushbutton switch device further comprises a dimensionally stable carrier plate.
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) | 1991-01-18 | 1991-07-20 | 1992-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-18 | 1995-07-20 | 1996-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-18 | 1999-07-20 | 2000-01-19 | $7700.00 | Window Closed / Lapsed |