Patent US3559531A successfully refreshed from Google Patents.
US3559531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speed control valve for a fluid motor
Assignee: Parker Hannifin Corp
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Filing: 1968-07-15
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Granted: 1971-02-02
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Expires: 1988-07-15
Abstract
Abstract A speed control valve for a fluid motor of the piston and cylinder type in which the valve seat engageable by the head of the valve member is inwardly facing whereby the valve member cannot be removed from the valve in an outwardly direction.
Inventors
- 👤 Kurt W Leibfritz
- 👤 Lester W Malinowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:18
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/20; F15B15/22; F15B15/223; Y; Y10; Y10T; Y10T137/00; Y10T137/7504; Y10T137/7613
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
229 words
A fluid motor comprising a cylinder having a piston therein and having a passage for introducing fluid to and from the cylinder and having an opening intersecting said passage, an inner end of the opening communicating with the interior of the cylinder, and an outer end of the opening communicating with the cylinder exterior, said opening including a threaded section, a valve attached to said cylinder, said valve comprising: a plug mounted in the opening and having a threaded connection with said threaded section and having inner and outer ends, the plug also having a duct intermediate said plug inner and outer ends communicating with said passage, said plug having a bore therethrough intersecting the duct, said plug bore having an inner end communicating with the cylinder interior, and having a threaded outer end open to the exterior of the plug, said plug having a valve seat facing the innner end of the plug bore, a valve member threadably engaged with the threaded bore and exposed to the exterior of the plug, the valve member projecting through said seat into the inner end of said plug bore, said valve member having a head within said inner end of the plug bore of larger diameter than said seat whereby said valve member cannot be withdrawn from said plug bore in a direction toward the outer end of the plug bore.
Claim 2
Dependent Claim
229 words
A fluid motor comprising a cylinder having a piston therein and having a passage for introducing fluid to and from the cylinder and having an opening intersecting said passage, an inner end of the opening communicating with the interior of the cylinder, and an outer end of the opening communicating with the cylinder exterior, said opening including a threaded section, a valve attached to said cylinder, said valve comprising: a plug mounted in the opening and having a threaded connection with said threaded section and having inner and outer ends, the plug also having a duct intermediate said plug inner and outer ends communicating with said passage, said plug having a bore therethrough intersecting the duct, said plug bore having an inner end communicating with the cylinder interior, and having a threaded outer end open to the exterior of the plug, said plug having a valve seat facing the innner end of the plug bore, a valve member threadably engaged with the threaded bore and exposed to the exterior of the plug, the valve member projecting through said seat into the inner end of said plug bore, said valve member having a head within said inner end of the plug bore of larger diameter than said seat whereby said valve member cannot be withdrawn from said plug bore in a direction toward the outer end of the plug bore.
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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |