Locking bolts for shut-off valves and switches
Abstract
Abstract IN A LOCKING BOLT FOR SHUT-OFF VALVES, SWITCHES, METERS, AND OTHER SUPPLY-CONTROLLING DEVICES, SUCH BOLT BEING ACTUATED BY AN INNER SPRING-BIASED PLUNGER HAVING AN AXIAL RECESS AND ACCESSIBLE ONLY THROUGH AN APERTURE IN THE BOLT SMALLER THAN THE DIAMETER OF THE RECESS, THE NOVEL PROVISION OF A SLIDABLE SLEEVE OR LINER IN SUCH RECESS WHICH MUST BE EXPANDED INTO TIGHT FRICTIONAL ENGAGEMENT WITH THE WALLS OF THE RECESS IN ORDER TO RETRACT THE PLUNGER TO UNLOCK THE BOLT. SEALING MEANS PREVENTING ACCESS TO THE INTERIOR OF THE LOCKING BOLT WITHOUT RUPTURE IS PROVIDED. THE LOCK IS ALSO ADAPTED TO FIX A COVER ON A METER CASING OR OTHER ENCLOSURE, TO PREVENT UNAUTHORIZED ACCESS THERETO, OR TO PREVENT REMOVAL OF THE METER ITSELF. D R A W I N G
Inventors
- 👤 L Morse
- 👤 A Nielsen
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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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) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |