Patent US2016731A successfully refreshed from Google Patents.
Patent US3727631A successfully refreshed from Google Patents.
US3727631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve for pressure indicators
Assignee: Individual
•
Filing: 1971-09-20
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Granted: 1973-04-17
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Expires: 1991-09-20
Abstract
Abstract A valve, of which valve disk can be pressed and rotated extra firmly against a main valve seat, against leakage and obstructive combustion residues thereat, by resilient force of a compression type coil spring mounted between a value bonnet and a spindle guide holding the spindle with screwed inner surface and can move axially for a range, also having a draught chamber which coordinates with an upper valve seat in letting out residual pressure inside a pressure indicator, and further having a ventilation opening on the side of the bonnet against corrosion of the coil spring.
Inventors
- 👤 T Suezawa
- 👤 T Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:09
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; F16K11/04; F16K11/044; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4245; Y10T137/4273; Y10T137/428; Y10T137/4294; Y10T137/4301; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/8667; Y10T137/86686
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
163 words
A valve for a fluid pressure indicator device comprising: A. a housing defining: i. an axial core; ii. an inner chamber in the intermediate portion of said core defining a lower valve seat and an upper valve seat; iii. a fluid intake conduit interconnecting said lower valving seat and the bottom of said housing; iv. a fluid outlet conduit interconnecting said chamber above said lower valve seat and a side of said housing; v. an exhaust vent leading from said core above said upper valve seat through said housing to the atmosphere; B. a threaded spindle reciprocably positioned in said core such that a lower valving portion reciprocating in said chamber is alternately contactable with said upper and lower valve seats; C. a guide secured to the top of said housing and threadedly engaging the top of said spindle; D. resilient means interposed between said guide and spindle so as to urge said spindle downwardly so as to close said lower valve seat.
Claim 2
Dependent Claim
163 words
A valve for a fluid pressure indicator device comprising: A. a housing defining: i. an axial core; ii. an inner chamber in the intermediate portion of said core defining a lower valve seat and an upper valve seat; iii. a fluid intake conduit interconnecting said lower valving seat and the bottom of said housing; iv. a fluid outlet conduit interconnecting said chamber above said lower valve seat and a side of said housing; v. an exhaust vent leading from said core above said upper valve seat through said housing to the atmosphere; B. a threaded spindle reciprocably positioned in said core such that a lower valving portion reciprocating in said chamber is alternately contactable with said upper and lower valve seats; C. a guide secured to the top of said housing and threadedly engaging the top of said spindle; D. resilient means interposed between said guide and spindle so as to urge said spindle downwardly so as to close said lower valve seat.
Claim 3
Dependent Claim
80 words
A valve for a fluid pressure indicator device as in claim 1, said guide further including: i. an outer bonnet secured to the top of said housing; ii. an interiorly threaded spindle guide engaging the exterior threads of said spindle and including exterior upper and lower limiting shoulders alternately abutting, respectively, the interior top of said bonnet and the top of said housing; iii. said resilient means being interposed between said lower shoulder and the interior top of said bonnet.
Claim 4
Dependent Claim
64 words
A valve for a fluid pressure indicator device as in claim 2, said spindle having a reduced diameter portion adjacent said lower valving portion so as to be out of contact with said valving portion as said lower valving portion is seated so as to vent said chamber and said fluid outlet via said exhaust vent as said housing is sealed from fluid intake.
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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) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |