Patent US3548833A successfully refreshed from Google Patents.
US3262467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spool valve with cavitation-minimizing valve assembly
Assignee: Parker Hannifin Corp
•
Filing: 1964-07-27
•
Granted: 1966-07-26
•
Expires: 1984-07-27
Abstract
No abstract record available.
Inventors
- 👤 Hugh J Stacey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:44
CPC Classifications
E; E02; E02F; E02F9/00; E02F9/20; E02F9/22; E02F9/226; F; F15; F15B; F15B13/00; F15B13/02; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/8667; Y10T137/86694; Y10T137/8671; Y10T137/87169; Y10T137/87233; Y10T137/87241; Y10T137/877; Y10T137/87829; Y10T137/87837; Y10T137/87861
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A VALVE ASSEMBLY FOR CONTROLLING ACTUATION OF A DOUBLE ACTING FLUID MOTOR COMPRISING A HOUSING HAVING A BORE INTERSECTED AT AXIALLY SPACED INTERVALS THEREALONG BY AN INLET PORT FOR CONNECTION WITH A FLUID PRESSURE SOURCE, A RETURN PORT FOR CONNECTION WITH A FLUID RESERVOIR, AND A PAIR OF MOTOR PORTS FOR CONNECTION WITH SUCH MOTOR; A VALVE SPOOL AXIALLY MOVABLE IN SAID BORE FROM A NEUTRAL POSITION BLOCKING FLUID COMMUNICATION BETWEEN SAID INLET PORT AND BOTH MOTOR PORTS TO AN OPERATING POSITION COMMUNICATING SAID INLET PORT WITH ONE MOTOR PORT AND SAID RETURN PORT WITH THE OTHER MOTOR PORT FOR ACTUATING SUCH MOTOR IN ONE DIRECTION; A SHUTTLE VALVE INSIDE SAID SPOOL MOVABLE TO COMMUNICATE SAID OTHER MOTOR PORT WITH SAID INLET PORT IN RESPONSE TO FLUID PRESSURE IN SAID
Claim 2
Dependent Claim
130 words
A VALVE ASSEMBLY FOR CONTROLLING ACTUATION OF A DOUBLE ACTING FLUID MOTOR COMPRISING A HOUSING HAVING A BORE INTERSECTED AT AXIALLY SPACED INTERVALS THEREALONG BY AN INLET PORT FOR CONNECTION WITH A FLUID PRESSURE SOURCE, A RETURN PORT FOR CONNECTION WITH A FLUID RESERVOIR, AND A PAIR OF MOTOR PORTS FOR CONNECTION WITH SUCH MOTOR; A VALVE SPOOL AXIALLY MOVABLE IN SAID BORE FROM A NEUTRAL POSITION BLOCKING FLUID COMMUNICATION BETWEEN SAID INLET PORT AND BOTH MOTOR PORTS TO AN OPERATING POSITION COMMUNICATING SAID INLET PORT WITH ONE MOTOR PORT AND SAID RETURN PORT WITH THE OTHER MOTOR PORT FOR ACTUATING SUCH MOTOR IN ONE DIRECTION; A SHUTTLE VALVE INSIDE SAID SPOOL MOVABLE TO COMMUNICATE SAID OTHER MOTOR PORT WITH SAID INLET PORT IN RESPONSE TO FLUID PRESSURE IN SAID
References Cited (Backward Citations)
US2783745A
Cited
US3006372A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-25 | 1970-01-24 | 1970-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-25 | 1974-01-24 | 1974-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-25 | 1978-01-24 | 1978-07-26 | $7700.00 | Window Closed / Lapsed |