Patent US3171435A successfully refreshed from Google Patents.
US3171435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solenoid operated valve assembly
Assignee: Parker Hannifin Corp
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Filing: 1961-12-05
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Granted: 1965-03-02
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Expires: 1981-12-05
Abstract
No abstract record available.
Inventors
- 👤 Zdenek J Lansky
- 👤 Kurt W Leibfritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:38
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/06; F15B13/08; F15B13/0803; F15B13/0832; F15B13/04; F15B13/0401; F15B13/0405; F15B13/0807; F15B13/0817; F15B13/0828; F15B13/0846; F15B13/0857; F16; F16K; F16K31/00; F16K31/12; F16K31/36; F16K31/40; F16K31/42; F16K31/423; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87169; Y10T137/87193; Y10T137/87209
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A VALVE BLOCK HAVING PASSAGES FOR FLOW OF FLUID AND TWO BORES FOR VALVE ELEMENTS; VALVE ELEMENTS AXIALLY SLIDABLE IN THE RESPECTIVE BORES TOWARD AND AWAY FROM ONE ANOTHER; EACH VALVE ELEMENT COMPRISING A PLUNGER PORTION AT ONE END FOR FLUID PRESSURE ACTUATION IN ONE DIRECTION, A STEM PORTION AT THE OTHER END AXIALLY GUIDED IN SAID VLAVE BLOCK, AND AN INTERMEDIATE VALVE HEAD; AXIALLY SPACED APART SEATS IN SAID VALVE BLOCK STRADDLING THE RESPECTIVE VALVE HEADS FOR ALTERNATE ENGAGEMENT BY THE LATTER UPON MOVEMENT OF SAID VALVE ELEMENTS IN OPPOSITE DIRECTIONS; AND MEANS PROVIDING RELATIVELY RESTRICTED FLUID COMMUNICATION BETWEEN SAID BORES WHEREBY FLUID UNDER PRESSURE IN ONE BORE ACTING ON THE PLUNGER PORTION OF ONE VALVE ELEMENT ACTUATES THE LATTER MORE RAPIDLY THAN FLUID PRESSURE ACTING ON THE PLUNGER PORTION OF THE OTHER VALVE ELEMENT VIA SUCH RESTRICTED FLUID COMMUNICATION.
Claim 2
Dependent Claim
141 words
A VALVE BLOCK HAVING PASSAGES FOR FLOW OF FLUID AND TWO BORES FOR VALVE ELEMENTS; VALVE ELEMENTS AXIALLY SLIDABLE IN THE RESPECTIVE BORES TOWARD AND AWAY FROM ONE ANOTHER; EACH VALVE ELEMENT COMPRISING A PLUNGER PORTION AT ONE END FOR FLUID PRESSURE ACTUATION IN ONE DIRECTION, A STEM PORTION AT THE OTHER END AXIALLY GUIDED IN SAID VLAVE BLOCK, AND AN INTERMEDIATE VALVE HEAD; AXIALLY SPACED APART SEATS IN SAID VALVE BLOCK STRADDLING THE RESPECTIVE VALVE HEADS FOR ALTERNATE ENGAGEMENT BY THE LATTER UPON MOVEMENT OF SAID VALVE ELEMENTS IN OPPOSITE DIRECTIONS; AND MEANS PROVIDING RELATIVELY RESTRICTED FLUID COMMUNICATION BETWEEN SAID BORES WHEREBY FLUID UNDER PRESSURE IN ONE BORE ACTING ON THE PLUNGER PORTION OF ONE VALVE ELEMENT ACTUATES THE LATTER MORE RAPIDLY THAN FLUID PRESSURE ACTING ON THE PLUNGER PORTION OF THE OTHER VALVE ELEMENT VIA SUCH RESTRICTED FLUID COMMUNICATION.
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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) | 1968-03-01 | 1968-08-31 | 1969-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-01 | 1972-08-31 | 1973-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-01 | 1976-08-31 | 1977-03-02 | $7700.00 | Window Closed / Lapsed |