US3406850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic system for excavator
Assignee: Vickers Inc
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Filing: 1965-09-20
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Granted: 1968-10-22
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Expires: 1985-09-20
Abstract
No abstract record available.
Inventors
- 👤 Hancox Ronald Norman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:26
CPC Classifications
E; E02; E02F; E02F9/00; E02F9/20; E02F9/22; E02F9/2264; E02F9/2267; E02F3/00; E02F3/04; E02F3/28; E02F3/36; E02F3/38; E02F3/382; E02F3/384; E02F3/42; E02F9/2221; E02F9/2278; E02F9/2296; F; F04; F04B; F04B49/00; F04B49/002; F04B49/08; F15; F15B; F15B11/00; F15B11/02; F15B11/16; F15B11/161; F15B11/165; F15B11/17; F15B2211/00; F15B2211/20; F15B2211/205; F15B2211/2053; F15B2211/20546; F15B2211/20553; F15B2211/25; F15B2211/253; F15B2211/30; F15B2211/305; F15B2211/30505; F15B2211/30525; F15B2211/31; F15B2211/3105; F15B2211/3111; F15B2211/3144; F15B2211/315; F15B2211/3157; F15B2211/31576; F15B2211/32; F15B2211/321; F15B2211/324; F15B2211/35; F15B2211/351; F15B2211/50; F15B2211/505; F15B2211/50509; F15B2211/50518; F15B2211/50563; F15B2211/50581; F15B2211/5059; F15B2211/515; F15B2211/5159; F15B2211/60; F15B2211/615; F15B2211/70; F15B2211/705; F15B2211/7051; F15B2211/7052; F15B2211/7053; F15B2211/7058; F15B2211/71; F15B2211/7114; F15B2211/7128
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
119 words
A HYDRAULIC SUPPLY AND CONTROL SYSTEM FOR SUPPLYING AND CONTROLLING A PLURALITY OF HYDRAULIC DEVICES HAVING VARIABLE PRESSURE AND VOLUMETRIC REQUIREMENTS WHICH COMPRISES A VARIABLE VOLUME PUMP, A CONTROL VALVE FOR EACH HYDRAULIC DEVICE TO WHICH THE OUTLET OF THE PUMP IS CONNECTED, SAID CONTROL VALVE BEING OPERATIVE TO PROVIDE UNRESTRICTED COMMUNICATION OF FLUID TO THE HYDRAULIC DEVICES, AND A CONTROL MECHANISM CONNECTED HYDRAULICALLY TO A SERVICE PRESSURE CONDUIT EXTENDING BETWEEN THE CONTROL VALVE AND THE HYDRAULIC DEVICES AND RESPONSIVE TO THE HIGHEST OPERATING PRESSURE OF FLUID BEING SUPPLIED TO ANY OF SAID DEVICES TO VARY THE PRESSURE AND VOLUME OF THE PUMP IN ACCORDANCE WITH THE REQUIREMENTS OF THE HYDRAULIC EQUIPMENT BY INCREASING THE VOLUME AS THE PRES-
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) | 1971-10-22 | 1972-04-22 | 1972-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-22 | 1976-04-22 | 1976-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-22 | 1980-04-22 | 1980-10-22 | $7700.00 | Window Closed / Lapsed |