Method of forming spacer rings in the convolutions of a bellows
Abstract
Abstract AN IMPROVED BELLOWS FOR REDUCING THE ADVERSE AMBIENT EFFECTS WHICH AMY OCCUR IN A TEMPERATURE RESPONSIVE SYSTEM WHICH INCLUDES A BULB, BELLOWS, AND A CAPILLARY TUBE, ALL FILLED WITH A THERMALLY RESPONSIVE FLUID, OR MATERIAL. IN SUCH A SYSTEM, THE BULB SERVES THE TEMPERATURE SENSING ELEMENT. BY REDUCING THE AMOUNT OF THE FLUID IN THE BELLOWS, THE ADVERSE EFFECT OF AMBIENT TEMPERATURE CHANGE AT THE BELLOWS IS GREATLY REDUCED. RINGS ARE FORMED WITHIN THE TIPS OF THE CONVOLUTIONS OF THE BELLOWS TO REDUCE THE VOLUME OF FLUID IN THE BELLOWS. THE RINGS MAY BE MADE OF METAL OR ELASTORMERIC MATERIAL OR OTHER SUITABLE MATERIAL. CASTING AND INJECTION METHODSD ARE USED TO FORM SAID RINGS.
Inventors
- 👤 Robert S Vernon
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |