US3176972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic control devices
Assignee: Individual
•
Filing: 1963-09-23
•
Granted: 1965-04-06
•
Expires: 1983-09-23
Abstract
No abstract record available.
Inventors
- 👤 Richard E Deschner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:08
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/32; F16F9/48; F15; F15B; F15B21/00; F15B21/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
136 words
IN A HYDRAULIC CONTROL DEVICE HAVING A HOUSING WITH A BORE CONTAINING FLUID AND A CYLINDER WITH A SLIDABLE PISTON, SAID PISTON FORMING A PART OF A RECIPROCATIVE PLUNGER ADAPTED TO RESIST MOVEMENT OF BODIES IN MOTION, SAID CYLINDER HAVING AN OUTER SURFACE AND AN AXIS AND A WALL WITH APERTURES THERETHROUGH TO PERMIT FLUID FLOW, THE PISTON HAVING "START STROKE" AND "END STROKE" POSITIONS BETWEEN WHICH SAID PISTON TRAVELS WHEN MAKING A WORKING STROKE; THE COMBINATION OF A CONTROL SURFACE PROVIDED WITHIN THE HOUSING ADJACENT THE OUTER SURFACE OF THE CYLINDER, SAID CONTROL SURFACE BEING SHAPED TO RESTRICT THE FLOW OF FLUID THROUGH THE APERTURES, AND PRESSURE MEANS URGING A PORTION OF THE CYLINDER ADJACENT THE APERTURES TOWARD THE CONTROL SURFACE, SAID PRESSURE MEANS COMPRISING A PRESSURE MEMBER RETAINED BETWEEN THE CYLINDER AND THE HOUSING.
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) | 1968-04-05 | 1968-10-05 | 1969-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-05 | 1972-10-05 | 1973-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-05 | 1976-10-05 | 1977-04-06 | $7700.00 | Window Closed / Lapsed |