US3186684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for measurement of the bottom runner clearance in a reaction type hydraulic turbine
Assignee: Hitachi Ltd
•
Filing: 1963-04-04
•
Granted: 1965-06-01
•
Expires: 1983-04-04
Abstract
No abstract record available.
Inventors
- 👤 Takase Mitsuo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:58
CPC Classifications
F; F03; F03B; F03B11/00; Y; Y02; Y02E; Y02E10/00; Y02E10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
IN A MIXED FLOW REACTION-TYPE HYDRAULIC TURBINE HAVING A ROTARY RUNNER PROVIDED WITH AN ANNULAR CLOSURE SHROUD, A GUIDE CASE INCLUDING A BOTTOM COVER HAVING AN ANNULAR SURFACE SPACED IN CLOSE PROXIMITY TO SAID CLOSURE SHROUD AND OVERLAPPING THE CLOSURE SHROUD RADIALLY AT ONE END THEREOF AND DEFINING WITH SAID BOTTOM COVER AN ANNULAR GAP CLEARANCE SPACE NOT VISIBLE FROM SAID ONE END DUE TO THE AFORESAID OVERLAP, A DRAFT TUBE CONNECTED TO SAID BOTTON COVER, MEANS TO DETERMINE SAID CLEARANCE SPACE COMPRISING A PLURALITY OF AXIALLY EXTENDING HOLES FORMED IN SAID BOTTOM COVER IN DALIGNMENT WITH SAID ANNULAR GAP, AT LEAST ONE CLOSED CHAMBER POSITIONED BENEATH SAID BOTTOM COVER IN ALIGNMENT WITH SAID HOLES TO DETERMINE A GUAGE MAY BE INSERTED THROUGH SAID HOLES TO DETERMINE THE SIZE OF SAID GAP AND MEANS PROVIDING ACCESS TO SAID CHAMBER THROUGH THE WALL OF SAID DRAFT TUBE.
Claim 2
Dependent Claim
146 words
IN A MIXED FLOW REACTION-TYPE HYDRAULIC TURBINE HAVING A ROTARY RUNNER PROVIDED WITH AN ANNULAR CLOSURE SHROUD, A GUIDE CASE INCLUDING A BOTTOM COVER HAVING AN ANNULAR SURFACE SPACED IN CLOSE PROXIMITY TO SAID CLOSURE SHROUD AND OVERLAPPING THE CLOSURE SHROUD RADIALLY AT ONE END THEREOF AND DEFINING WITH SAID BOTTOM COVER AN ANNULAR GAP CLEARANCE SPACE NOT VISIBLE FROM SAID ONE END DUE TO THE AFORESAID OVERLAP, A DRAFT TUBE CONNECTED TO SAID BOTTON COVER, MEANS TO DETERMINE SAID CLEARANCE SPACE COMPRISING A PLURALITY OF AXIALLY EXTENDING HOLES FORMED IN SAID BOTTOM COVER IN DALIGNMENT WITH SAID ANNULAR GAP, AT LEAST ONE CLOSED CHAMBER POSITIONED BENEATH SAID BOTTOM COVER IN ALIGNMENT WITH SAID HOLES TO DETERMINE A GUAGE MAY BE INSERTED THROUGH SAID HOLES TO DETERMINE THE SIZE OF SAID GAP AND MEANS PROVIDING ACCESS TO SAID CHAMBER THROUGH THE WALL OF SAID DRAFT TUBE.
References Cited (Backward Citations)
US1823702A
Cited
GB373940A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-05-31 | 1968-11-30 | 1969-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-31 | 1972-11-30 | 1973-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-31 | 1976-11-30 | 1977-06-01 | $7700.00 | Window Closed / Lapsed |