Apparatus for manufacturing a pump spindle
Abstract
Abstract A PUMP SPINDLE HAS A SCREW-SHAPED CONFIGURATION AND IS IN THE FORM OF AN ELONGATED HOLLOW TUBE OF SMALL WALL THICKNESS, CARRYING AT ONE END A MEANS THROUGH WHICH A DRIVE IS TRANSMITTED TO THE PUMP SPINDLE. THE TUBE IS GIVEN ITS REQUIRED CONFIGURATION BY MEANS OF PRESSING JAWS WHICH PRESS INWARDLY AGAINST THE TUBE AND WHICH ARE SUITABLY SHAPED SO AS TO ACHIEVE THE DESIRED HELICAL CONFIGURATION OF THE HOLLOW PUMP SPINDLE. THESE JAWS ARE SUPPORTED NOT ONLY FOR AXIAL MOVEMENT BUT ALSO FOR RADIAL MOVEMENT TOWARD AND AWAY FROM A GIVEN AXIS ALONG WHICH THE TUBE IS ADVANCED AND AROUND WHICH THE TUBE IS ROTATED, SO THAT BY ADVANCING THE TUBE IN STEPS SYNCHRONIZED WITH THE MOVEMENT OF THE SHAPING JAWS THERE WILL ISSUE FROM AN APPARATUS FOR MANUFACTURING THE PUMP SPINDLE A TUBE OF REQUIRED CONFIGURATION FROM WHICH A SECTION OF PREDETERMINED LENGTH CAN BE CUT. THEREAFTER, A CONNECTING MEANS IS FASTENED TO ONE END OF THE THUS CUT TUBE TO BE ABLE TO TRANSMIT A DRIVE TO THE TUBE THROUGH THE CONNECTING MEANS.
Inventors
- 👤 Karel Kozusnik
Bibliographic Details
Claims Analysis
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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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |