US3095825A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Locking mechanism for telescoping members
Assignee: Individual
•
Filing: 1961-07-10
•
Granted: 1963-07-02
•
Expires: 1981-07-10
Abstract
No abstract record available.
Inventors
- 👤 John W Sandberg
- 👤 Balzer Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:54
CPC Classifications
F; F16; F16B; F16B7/00; F16B7/10; F16B7/14; F16B7/1427; Y; Y10; Y10T; Y10T403/00; Y10T403/70; Y10T403/7047
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
IN A LOCKING MECHANISM FOR A PUMP OPERATIVE TO MOVE FLUID INTO AND OUT OF AN ELONGATED CYLINDER, THE COMBINATION OF: A MEMBER ADAPTED FOR AXIAL AND ROTATABLE MOVEMENT IN THE CYLINDER; A PISTON CARRIED BY AND ROTATABLE WITH SAID MEMBER, AND INCLUDING A PLURALITY OF RADIALLY OUTWARDLY DIRECTED CAM LOBES; AND A RESILIENT PISTON RING MOUNTED TO SAID PISTON FOR AXIAL AND SLIDABLE MOVEMENT IN THE CYLINDER, AND INCLUDING A PLURALITY OF RADIALLY INWARDLY DIRECTED CAM SHOULDERS ADJACENT SAID CAM LOBES, WHEREBY SAID PISTON RING IS RADIALLY COMPRESSIBLE FOR RESILIENT SLIDABLE ENGAGEMENT WITH THE WALLS OF THE CYLINDER, AND SAID CAM LOBES ARE URGABLE RADIALLY OUTWARDLY INTO FORCIBLE ENGAGEMENT WITH SAID CAM SHOULDERS UPON ROTATION OF SAID MEMBER TO RADIALLY EXPAND SAID PISTON RING FOR LOCKING FRICTIONAL ENGAGEMENT WITH THE CYLINDER TO THEREBY LOCK SAID PISTON IN ANY POSITION OF ITS STROKE.
Claim 2
Dependent Claim
143 words
IN A LOCKING MECHANISM FOR A PUMP OPERATIVE TO MOVE FLUID INTO AND OUT OF AN ELONGATED CYLINDER, THE COMBINATION OF: A MEMBER ADAPTED FOR AXIAL AND ROTATABLE MOVEMENT IN THE CYLINDER; A PISTON CARRIED BY AND ROTATABLE WITH SAID MEMBER, AND INCLUDING A PLURALITY OF RADIALLY OUTWARDLY DIRECTED CAM LOBES; AND A RESILIENT PISTON RING MOUNTED TO SAID PISTON FOR AXIAL AND SLIDABLE MOVEMENT IN THE CYLINDER, AND INCLUDING A PLURALITY OF RADIALLY INWARDLY DIRECTED CAM SHOULDERS ADJACENT SAID CAM LOBES, WHEREBY SAID PISTON RING IS RADIALLY COMPRESSIBLE FOR RESILIENT SLIDABLE ENGAGEMENT WITH THE WALLS OF THE CYLINDER, AND SAID CAM LOBES ARE URGABLE RADIALLY OUTWARDLY INTO FORCIBLE ENGAGEMENT WITH SAID CAM SHOULDERS UPON ROTATION OF SAID MEMBER TO RADIALLY EXPAND SAID PISTON RING FOR LOCKING FRICTIONAL ENGAGEMENT WITH THE CYLINDER TO THEREBY LOCK SAID PISTON IN ANY POSITION OF ITS STROKE.
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) | 1966-07-01 | 1966-12-31 | 1967-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-01 | 1970-12-31 | 1971-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-01 | 1974-12-31 | 1975-07-02 | $7700.00 | Window Closed / Lapsed |