Patent US3844025A successfully refreshed from Google Patents.
US3844025A
Expired / Lapsed
US
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Method of making a pressure actuated control device
Assignee: Gestra KSB Vertriebs GmbH and Co KG
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Filing: 1973-08-15
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Granted: 1974-10-29
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Expires: 1993-08-15
Abstract
Abstract A method of making light weight pressure actuated diaphragm control units from two thin preshaped resilient casing shells having clamping flanges diverging at an outwardly oblique angle from the hollow bodies of the shells by employing external cylindrical clamping devices and sufficient force to reshape the preformed diverging flanges by flattening them against the diaphragm and then welding the peripheral edges of this clamped assembly to permanently secure the clamping flanges in the flattened position for improved clamping of the diaphragm in the device and longer operating life.
Inventors
- 👤 J Lingnau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:45
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/126; B; B23; B23K; B23K37/00; B23K37/04; B23K5/00; B23K5/02; B23K5/08; F16K27/00; F16K27/10; F16K27/102; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49893
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
111 words
A method for making a pressure actuated control device having a diaphragm located between two housing members which comprises: performing two thin walled housing members with obliquely flared peripheral clamping flanges of substantial width diverging outwardly from normal clamping position the flanges having clamping areas disposed along their inner edges; assembling said housing members in register with one another on opposite sides of a flexible diaphragm; clamping said assembly together with external clamping means under sufficient external clamping force to elastically deform said flanges and bring their full clamping areas into firm contact with said diaphragm; and welding the peripheral edges of said clamped assembly while said flanges remain elastically deformed.
Claim 2
Independent Claim
111 words
A method for making a pressure actuated control device having a diaphragm located between two housing members which comprises: performing two thin walled housing members with obliquely flared peripheral clamping flanges of substantial width diverging outwardly from normal clamping position the flanges having clamping areas disposed along their inner edges; assembling said housing members in register with one another on opposite sides of a flexible diaphragm; clamping said assembly together with external clamping means under sufficient external clamping force to elastically deform said flanges and bring their full clamping areas into firm contact with said diaphragm; and welding the peripheral edges of said clamped assembly while said flanges remain elastically deformed.
Claim 3
Dependent Claim
18 words
A method according to claim 1 in which said housing members are constructed of thin walled resilient material.
Claim 4
Dependent Claim
27 words
A method according to claim 1 in which said flanges are flattened and the peripheral edges thereof are bent toward each other by said external clamping force.
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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |