US3760480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve operator and method of making the same
Assignee: LEDEEN FLOW CONTROL SYSTEMS
•
Filing: 1971-02-16
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Granted: 1973-09-25
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Expires: 1991-02-16
Abstract
Abstract The valve operator disclosed includes a housing constructed of substantially identical housing halves joined together at mating surfaces. Cylinder means is secured to the housing and bridges the housing halves.
Inventors
- 👤 W Tupker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:44
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/16; F16K1/18; F16K1/22; F16K1/221; F16K31/00; F16K31/12; F16K31/16; F16K31/163; F16K31/1635; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49405; Y10T29/49412; Y10T29/49414; Y10T29/49416; Y10T29/49417; Y10T29/49826; Y10T29/49861; Y10T29/49893
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
61 words
The method of manufacturing a valve operator housing comprising the steps of: casting first and second substantially identical halves of said housing; machine finishing first predetermined areas of each of said halves individually; separably joining said havles together; and machine finishing second predetermined areas of each of said halves thereby to provide continuous opposed surfaces on noncontacting portions of said halves.
Claim 2
Independent Claim
61 words
The method of manufacturing a valve operator housing comprising the steps of: casting first and second substantially identical halves of said housing; machine finishing first predetermined areas of each of said halves individually; separably joining said havles together; and machine finishing second predetermined areas of each of said halves thereby to provide continuous opposed surfaces on noncontacting portions of said halves.
Claim 3
Dependent Claim
48 words
The method as defined in claim 1 which further includes the steps of opening said finished housing halves; pre-assembling internal operating parts of said operator; positioning said pre-assembled parts in one of said housing halves; and seating the other of said housing halves to enclose said pre-assembled parts.
Claim 4
Dependent Claim
39 words
The method as defined in claim 1 which further includes the step of retaining said first and second halves together subsequent to said finishing of said second predetermined areas thereby to maintain the identity of said continuous mating surfaces.
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |