US3751690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezoelectric ignition apparatus
Assignee: Panasonic Holdings Corp
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Filing: 1972-01-31
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Granted: 1973-08-07
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Expires: 1992-01-31
Abstract
Abstract A compact and accurately-operable piezoelectric ignition apparatus comprising a case, a piezoelectric element fixed on one side of the case by a fixing covering, a hammer and a first spring both arranged coaxially with the piezoelectric element, a hammer pressing plate, a support member, the hammer pressing plate and the support member being joined rotatably in an inverted-V shape at an end each thereof, and a pressure plate, the other end of the support member being attached to the case, the pressure plate having a free end in contact with the joint between the support member and the hammer pressing plate, the hammer having a protrusion which engages with and disengages from the other end of the hammer pressing plate as the pressure plate is depressed.
Inventors
- 👤 O Okamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:38
CPC Classifications
F; F23; F23Q; F23Q2/00; F23Q2/28; F23Q2/285; F23Q2/287; F23Q3/00; F23Q3/002
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
163 words
A piezoelectric ignition apparatus comprising a case, a piezoelectric element fixed on one side of said case by means of a fixing covering, a hammer and a first spring both arranged coaxially with said piezoelectric element, a hammer pressing plate, a support member, a hinged joint between said hammer pressing plate and said support member, said hammer pressing plate and said support member being rotatably joined at one end thereof in an inverted V-shape, and a pressure plate, said support member and said hammer pressing plate being rotatable about the joint therebetween, the other end of the support member being joined rotatably to said case by means of a hinge, said pressure plate having a free end in contact with the hinged joint between said support member and said hammer pressing plate and another end hinged to said casing, said hammer having a protrusion which engages with and disengages from other end of said hammer pressing plate as said pressure plate is depressed.
Claim 2
Dependent Claim
163 words
A piezoelectric ignition apparatus comprising a case, a piezoelectric element fixed on one side of said case by means of a fixing covering, a hammer and a first spring both arranged coaxially with said piezoelectric element, a hammer pressing plate, a support member, a hinged joint between said hammer pressing plate and said support member, said hammer pressing plate and said support member being rotatably joined at one end thereof in an inverted V-shape, and a pressure plate, said support member and said hammer pressing plate being rotatable about the joint therebetween, the other end of the support member being joined rotatably to said case by means of a hinge, said pressure plate having a free end in contact with the hinged joint between said support member and said hammer pressing plate and another end hinged to said casing, said hammer having a protrusion which engages with and disengages from other end of said hammer pressing plate as said pressure plate is depressed.
Claim 3
Dependent Claim
46 words
A piezoelectric ignition apparatus according to claim 1, further comprising a second spring interposed between said pressure plate and said hammer pressing plate thereby assuring the engagement and disengagement of said protrusion of said hammer with and from said other end of said hammEr pressing plate.
Claim 4
Dependent Claim
48 words
A piezoelectric ignition apparatus according to claim 1, further comprising a second return spring interposed betwen said case and said support member, said return spring being adapted to return said support member and said hammer pressing plate to their original positions after the depression of said pressure plate.
Claim 5
Dependent Claim
64 words
A piezoelectric ignition apparatus according to claim 1, in which said fixing covering has a sloped portion and said other that-end of the hammer pressing plate which is adapted to engage with said protrusion of said hammer slides up said sloped portion as said pressure plate is depressed, whereby said other end of said hammer pressing plate disengages from said protrusion of said hammer.
Claim 6
Dependent Claim
26 words
A piezoelectric ignition apparatus according to claim 1, in which said fixing covering is provided with a guide aperture for controlling the motion of said hammer.
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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |