Patent US3736540A successfully refreshed from Google Patents.
US3736540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mounting of an armature plate in a thermoelectric pilot safety device
Assignee: Vaillant GmbH
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Filing: 1971-03-31
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Granted: 1973-05-29
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Expires: 1991-03-31
Abstract
Abstract A thermoelectric pilot safety apparatus includes an electromagnet and a plate shaped armature having one face adjacent the electromagnet. Extending in the direction away from the other face is a stem which connects to a valve closure. A disk is secured to the plate end of the stem. A ring connects the plate and the disk. In one embodiment the disk and ring are integral and formed of a thermoplastic with the edge of the ring at the one face turned over the plate by hot working after assembly. In another embodiment the ring is thermoplastic and it is the edge at the disc that is turned over into engagement by hot working. The stem may be integral with the disk or be of a thermoplastic material which is beaded out by hot working to provide the connection between the two.
Inventors
- 👤 D Westphal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:19
CPC Classifications
F; F23; F23Q; F23Q9/00; F23Q9/08; F23Q9/12; F23Q9/14; Y; Y10; Y10T; Y10T137/00; Y10T137/1407; Y10T137/1516
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
95 words
In a thermoelectric pilot safety apparatus including a valve closure, an electromagnet, an armature plate for said electromagnet, a disk part on the other side of the plate from the electromagnet, a stem part connecting the disk part and the closure, and a ring part having one edge engaging the disk part and the other edge engaging the plate, the improvement comprising: one part being a thermoplastic which after assembly with the other parts and the plate has one projection thereof folded to form an integral flange to provide said engagement with the connecting part.
Claim 2
Dependent Claim
95 words
In a thermoelectric pilot safety apparatus including a valve closure, an electromagnet, an armature plate for said electromagnet, a disk part on the other side of the plate from the electromagnet, a stem part connecting the disk part and the closure, and a ring part having one edge engaging the disk part and the other edge engaging the plate, the improvement comprising: one part being a thermoplastic which after assembly with the other parts and the plate has one projection thereof folded to form an integral flange to provide said engagement with the connecting part.
Claim 3
Dependent Claim
28 words
In an apparatus as set forth in claim 1, wherein said one part is said ring part and said one projection is one edge of the ring part.
Claim 4
Dependent Claim
31 words
In an apparatus as set forth in claim 2, wherein said disk part and the ring part are integral and said one edge is the edge in engagement with the plate.
Claim 5
Dependent Claim
30 words
In an apparatus as set forth in claim 3, wherein the ring part has an internal groove adjacent the other edge thereof and said disk is seated in said groove.
Claim 6
Dependent Claim
19 words
In an apparatus as set forth in claim 2, wherein said one edge is the edge engaging the disk.
Claim 7
Dependent Claim
17 words
In an apparatus as set forth in claim 1, wherein said one part is said stem part.
Claim 8
Dependent Claim
27 words
In an apparatus as set forth in claim 2, wherein Said stem part, said disk part and said ring part is a unitary piece of thermoplastic material.
Claim 9
Dependent Claim
42 words
In an apparatus as set forth in claim 1, wherein said disk part has the peripheral area thereof positioned in a common plane and in contact with said plate, and has the central area thereof concave on the side adjacent the plate.
Claim 10
Dependent Claim
39 words
In an apparatus as set forth in claim 8, wherein said stem is formed of thermoplastic material and defines a stud of reduced cross-section which projects through said central area and is beaded outwardly to engage said disk part.
References Cited (Backward Citations)
US2296322A
Cited
US3042842A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |