Patent US3200713A successfully refreshed from Google Patents.
US3200713A
Expired / Lapsed
US
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Hydraulic servo-mechanism
Assignee: US Philips Corp
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Filing: 1962-03-26
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Granted: 1965-08-17
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Expires: 1982-03-26
Abstract
No abstract record available.
Inventors
- 👤 Viersma Taco Jan
- 👤 Gunther Helmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:47
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/02; B; B23; B23Q; B23Q5/00; B23Q5/22; B23Q5/26; B23Q5/266; B23Q5/34; B23Q5/36; F15B11/08; F15B13/00; F15B13/16; F15B9/00; F15B9/02; F15B9/08; F15B2211/00; F15B2211/20; F15B2211/205; F15B2211/2053; F15B2211/20538; F15B2211/30; F15B2211/305; F15B2211/30525; F15B2211/31; F15B2211/3144; F15B2211/315; F15B2211/3157; F15B2211/31576; F15B2211/32; F15B2211/327; F15B2211/50; F15B2211/505; F15B2211/50509; F15B2211/50518; F15B2211/50563; F15B2211/515; F15B2211/5153; F15B2211/52; F15B2211/528; F15B2211/55; F15B2211/60; F15B2211/63; F15B2211/6303; F15B2211/6306; F15B2211/6313; F15B2211/665; F15B2211/6653; F15B2211/70; F15B2211/705; F15B2211/7051; F15B2211/7053; F15B2211/765; Y; Y10; Y10T; Y10T82/00; Y10T82/25; Y10T82/2531; Y10T82/2533
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
163 words
A HYDRAULIC SERVO- MECHANISM COMPRISING A WORKING CYLINDER, A PISTON MOVABLE WITHIN SAID CYLINDER AND DIVIDING SAID CYLINDER INTO A FIRST AND A SECOND COMPARTMENT, A CONTINUOUS PRESSURE LIQUID SUPPLY SYSTEM FOR MOVING AND POSITIONING SAID PISTON WITHI NSAID CYLINDER, SAID SYSTEM INCLUDING A FIRST ADJUSTABLE VALVE PORT MEANS FOR CONTROLLING A CONTINUOUS FLOW OF LIQUID INTO AT LEAST ONE SAID COMPARTMENT AND A SECOND ADJUSTABLE VALVE PORT MEANS FOR CONTROLLING A CONTINUOUS FLOW OF LIQUID OUT OF SAID ONE SAID COMPARTMENT, MEANS FOR ADJUSTING AT LEAST ONE OF SAID FIRST AND SECOND VALVE PORTS FOR ESTABLISHING A FLOW CONDITION WITHIN SAID ONE SAID COMPARTMENT FOR POSITIONING SAID PISTON WITHIN SAID CYLINDER, AND MEANS RESPONSIVE TO PRESSURE WITHIN SAID ONE SAID COMPARTMENT COUPLED WITH AT LEAST ONE OF SAID FIRST AND SECOND ADJUSTABLE VALVE PORTS FOR ADJUSTING THE SAID COUPLED VALVE PORT FOR MAINTAINING THE SAID ESTABLISHED FLOW CONDITION AND POSITION OF SAID PISTON COMPENSATE FOR EXTERNAL LOAD CONDITIONS ACTING ON SAID PISTON.
Claim 2
Dependent Claim
163 words
A HYDRAULIC SERVO- MECHANISM COMPRISING A WORKING CYLINDER, A PISTON MOVABLE WITHIN SAID CYLINDER AND DIVIDING SAID CYLINDER INTO A FIRST AND A SECOND COMPARTMENT, A CONTINUOUS PRESSURE LIQUID SUPPLY SYSTEM FOR MOVING AND POSITIONING SAID PISTON WITHI NSAID CYLINDER, SAID SYSTEM INCLUDING A FIRST ADJUSTABLE VALVE PORT MEANS FOR CONTROLLING A CONTINUOUS FLOW OF LIQUID INTO AT LEAST ONE SAID COMPARTMENT AND A SECOND ADJUSTABLE VALVE PORT MEANS FOR CONTROLLING A CONTINUOUS FLOW OF LIQUID OUT OF SAID ONE SAID COMPARTMENT, MEANS FOR ADJUSTING AT LEAST ONE OF SAID FIRST AND SECOND VALVE PORTS FOR ESTABLISHING A FLOW CONDITION WITHIN SAID ONE SAID COMPARTMENT FOR POSITIONING SAID PISTON WITHIN SAID CYLINDER, AND MEANS RESPONSIVE TO PRESSURE WITHIN SAID ONE SAID COMPARTMENT COUPLED WITH AT LEAST ONE OF SAID FIRST AND SECOND ADJUSTABLE VALVE PORTS FOR ADJUSTING THE SAID COUPLED VALVE PORT FOR MAINTAINING THE SAID ESTABLISHED FLOW CONDITION AND POSITION OF SAID PISTON COMPENSATE FOR EXTERNAL LOAD CONDITIONS ACTING ON SAID PISTON.
Claim 3
Dependent Claim
133 words
A HYDRAULIC SERVO-MECHANISM COMPRISING A WORKING CYLINDER HAVING APISTON SLIDEABLY MOVABLE THEREIN AND DIVIDING SAID CYLINDER INTO FIRST AND SECOND COMPARTMENTS, A PRESSURE LIQUID SUPPLY SYSTEM COMMUNICATING WITH EACH SAID COMPARTMEN AND INCLUDING A CONTROL VALVE MEANS REGULATING THE LIQUID FLOW FROM SAID WORKING CYLINDER FOR MOVING SAID PISTON, AND PRESSURE RESPONSIVE MEANS FOR COMPENSATING FOR LOAD VARIATIONS ACTING ON SAID PISTON; SAID PRESSURE RESPONSIVE MEANS COMPRISING SAID PISTON, A RECESS IN SAID PISTON ADJACENT ONE OF SAID COMPARTMENTS, AT LEAST ONE DUCT IN SAID PISTON COMMUNICATING SAID RECESS AND THE OTHER OF SAID COMPARTMENTS, AN ELASTIC DIAPHRAGM SCURED TO SAID PISTON AT ITS PERIPHERY AND OVERLYING SAID RECESS, SAID DIAPHRAGM DEFINING A VARIABLE APERTURE BETWEEN SAID PISTON RECESS AND SAID ONE COMPARTMENT FOR PROVIDING A VARIABLE LIQUID FLOW PASSAGE BETWEEN SAID COMPARTMENTS.
Claim 4
Dependent Claim
133 words
A HYDRAULIC SERVO-MECHANISM COMPRISING A WORKING CYLINDER HAVING APISTON SLIDEABLY MOVABLE THEREIN AND DIVIDING SAID CYLINDER INTO FIRST AND SECOND COMPARTMENTS, A PRESSURE LIQUID SUPPLY SYSTEM COMMUNICATING WITH EACH SAID COMPARTMEN AND INCLUDING A CONTROL VALVE MEANS REGULATING THE LIQUID FLOW FROM SAID WORKING CYLINDER FOR MOVING SAID PISTON, AND PRESSURE RESPONSIVE MEANS FOR COMPENSATING FOR LOAD VARIATIONS ACTING ON SAID PISTON; SAID PRESSURE RESPONSIVE MEANS COMPRISING SAID PISTON, A RECESS IN SAID PISTON ADJACENT ONE OF SAID COMPARTMENTS, AT LEAST ONE DUCT IN SAID PISTON COMMUNICATING SAID RECESS AND THE OTHER OF SAID COMPARTMENTS, AN ELASTIC DIAPHRAGM SCURED TO SAID PISTON AT ITS PERIPHERY AND OVERLYING SAID RECESS, SAID DIAPHRAGM DEFINING A VARIABLE APERTURE BETWEEN SAID PISTON RECESS AND SAID ONE COMPARTMENT FOR PROVIDING A VARIABLE LIQUID FLOW PASSAGE BETWEEN SAID COMPARTMENTS.
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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) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |