Patent US3295452A successfully refreshed from Google Patents.
US3295452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil lubricated hydraulic powered concrete pump
Assignee: Burnup and Sims Inc
•
Filing: 1966-08-15
•
Granted: 1967-01-03
•
Expires: 1986-08-15
Abstract
No abstract record available.
Inventors
- 👤 Max L Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:10
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/14; F04B15/00; F04B15/02; F04B53/16; F04B53/162; F04B53/164; F04B9/00; F04B9/08; F04B9/10; F04B9/103; F04B9/107; F04B9/109; F04B9/117; F04B9/1172; F04B9/1174; Y; Y10; Y10S; Y10S417/00; Y10S417/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
195 words
IN A HYDRAULIC POWERED ELECTRICALLY CONTROLLED CONCRETE PUMP ASSEMBLY HAVING A HYDRAULIC FLUID RESERVOIR, A HYDRAULIC PRESSURE MEANS CONNECTED THERETO, A CONCRETE PUMP CYLINDER, A CONCRETE SUCKING AND PUMPING PISTON, A FIRST HYDRAULIC CYLINDER AND PISTON ACTUATING SAID CONCRETE SUCKING AND PUMPING PISTON, A FIRST TWO-WAY SOLENOID ACTUATED VALVE CONTROLLING PRESSURE FROM SAID HYDRAULIC PRESSURE MEANS TO SAID FIRST HYDRAULIC CYLINDER, A CONCRETE PUMP CONTROL VALVE DIRECTING CONCRETE FLOW TO AND FROM SAID CONCRETE PUMP CYLINDER, A SECOND HYDRAULIC CYLINDER AND PISTON ACTUATING SAID CONCRETE PUMP CONTROL VALVE, A SECOND TWO-WAY SOLENOID VALVE CONTROLLING PRESSURE FROM SAID PRESSURE MEANS TO BOTH SIDES OF SAID PISTON OF SAID SECOND HYDRAULIC CYLINDER AND PISTON FOR CYCLING SAID CONCRETE PUMP CONTROL VALVE IN RELATION TO SAID CONCRETE SUCKING AND PUMPING PISTON; THE IMPROVEMENT COMPRISING A LUBRICANT ABSORBING AND DISPENSING PISTON RING ON SAID CONCRETE SUCKING AND PUMPING PISTON, A LUBRICANT CONDUIT EXTENDING FROM A LUBRICANT SOURCE OF SUPPLY INTO SAID CONCRETE PUMP CYLINDER, A LUBRICANT PRESSURE FEED PUMP CONNECTED IN SAID LUBRICANT CONDUIT, AND A CYCLING PRESSURE CONDUIT CONNECTING SAID LUBRICANT PRESSURE FEED PUMP TO SAID SECOND TWO-WAY SOLENOID ACTUATED VALVE TO ACTUATE SAID LUBRICANT PRESSURE FEED PUMP.
Claim 2
Dependent Claim
195 words
IN A HYDRAULIC POWERED ELECTRICALLY CONTROLLED CONCRETE PUMP ASSEMBLY HAVING A HYDRAULIC FLUID RESERVOIR, A HYDRAULIC PRESSURE MEANS CONNECTED THERETO, A CONCRETE PUMP CYLINDER, A CONCRETE SUCKING AND PUMPING PISTON, A FIRST HYDRAULIC CYLINDER AND PISTON ACTUATING SAID CONCRETE SUCKING AND PUMPING PISTON, A FIRST TWO-WAY SOLENOID ACTUATED VALVE CONTROLLING PRESSURE FROM SAID HYDRAULIC PRESSURE MEANS TO SAID FIRST HYDRAULIC CYLINDER, A CONCRETE PUMP CONTROL VALVE DIRECTING CONCRETE FLOW TO AND FROM SAID CONCRETE PUMP CYLINDER, A SECOND HYDRAULIC CYLINDER AND PISTON ACTUATING SAID CONCRETE PUMP CONTROL VALVE, A SECOND TWO-WAY SOLENOID VALVE CONTROLLING PRESSURE FROM SAID PRESSURE MEANS TO BOTH SIDES OF SAID PISTON OF SAID SECOND HYDRAULIC CYLINDER AND PISTON FOR CYCLING SAID CONCRETE PUMP CONTROL VALVE IN RELATION TO SAID CONCRETE SUCKING AND PUMPING PISTON; THE IMPROVEMENT COMPRISING A LUBRICANT ABSORBING AND DISPENSING PISTON RING ON SAID CONCRETE SUCKING AND PUMPING PISTON, A LUBRICANT CONDUIT EXTENDING FROM A LUBRICANT SOURCE OF SUPPLY INTO SAID CONCRETE PUMP CYLINDER, A LUBRICANT PRESSURE FEED PUMP CONNECTED IN SAID LUBRICANT CONDUIT, AND A CYCLING PRESSURE CONDUIT CONNECTING SAID LUBRICANT PRESSURE FEED PUMP TO SAID SECOND TWO-WAY SOLENOID ACTUATED VALVE TO ACTUATE SAID LUBRICANT PRESSURE FEED PUMP.
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) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |