US3312388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for suction valves for reciprocating machinery
Assignee: Stal Refrigeration AB
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Filing: 1965-08-25
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Granted: 1967-04-04
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Expires: 1985-08-25
Abstract
No abstract record available.
Inventors
- 👤 Brandin Tore
- 👤 Lundvik Karl Vilhelm Bertil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:27
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/10; F04B39/1073; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7859
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
189 words
A DEVICE FOR SUCTION VALVE FOR RECIPROCATION MACHINES SUCH AS COMPRESSORS COMPRISING, A CYLINDER, A PISTON THEREIN, AN ANNULAR VALVE SEAT ARRANGED AS AN EXTENSION OF THE CYLINDER, SAID SEAT HAVING A PLURALITY OF PASSAGES EXTENDING THROUGH IT FOR THE PASSAGE OF WORKING MEDIUM, A RING-SHAPED VALVE BAND DISPOSED ON THE SIDE OF THE VALVE SEAT AND IN CONTACT THEREWITH, THE VALVE BAND BEING PROVIDED WITH A PLURALITY OF ELONGATED TABS THAT ARE FLEXED INWARDLY UPON THE DESCENT OF THE PISTON, EACH OF SAID TABS, APART FROM ITS BASE PORTION LOCATED ADJACENT TO THE BAND, HAVING A CONFIGURATION CORRESPONDING TO A LONGITUDINAL SECTION THROUGH A SPINDLE, THE SIDE EDGES OF EACH TAB BEING CONVEX FROM A POINT JUST ABOVE ITS BASE PORTION TO ITS EXTERMITY, THE CONVEX EDGES NEAR SUCH BASE PORTION EXTENDING INTO A CONCAVITY, THE TABS DEFINING SPACES BETWEEN THEM WHICH SPACES INCREASE IN WIDTH IN TWO DIRECTIONS FROM THE APPROXIMATE TRANSVERSE CENTER LINE OF THE TABS, THE SPACING BETWEEN THE TABS BETWEEN THEIR APPROXIMATE CENTERS AND THE BAND BEING DROPLET SHAPE, THE VALVE SEAT OPENINGS CORRESPONDING IN SHAPE SUBSTANTIALLY TO THE SPINDLE-SHAPED PORTIONS OF THE TABS.
Claim 2
Independent Claim
189 words
A DEVICE FOR SUCTION VALVE FOR RECIPROCATION MACHINES SUCH AS COMPRESSORS COMPRISING, A CYLINDER, A PISTON THEREIN, AN ANNULAR VALVE SEAT ARRANGED AS AN EXTENSION OF THE CYLINDER, SAID SEAT HAVING A PLURALITY OF PASSAGES EXTENDING THROUGH IT FOR THE PASSAGE OF WORKING MEDIUM, A RING-SHAPED VALVE BAND DISPOSED ON THE SIDE OF THE VALVE SEAT AND IN CONTACT THEREWITH, THE VALVE BAND BEING PROVIDED WITH A PLURALITY OF ELONGATED TABS THAT ARE FLEXED INWARDLY UPON THE DESCENT OF THE PISTON, EACH OF SAID TABS, APART FROM ITS BASE PORTION LOCATED ADJACENT TO THE BAND, HAVING A CONFIGURATION CORRESPONDING TO A LONGITUDINAL SECTION THROUGH A SPINDLE, THE SIDE EDGES OF EACH TAB BEING CONVEX FROM A POINT JUST ABOVE ITS BASE PORTION TO ITS EXTERMITY, THE CONVEX EDGES NEAR SUCH BASE PORTION EXTENDING INTO A CONCAVITY, THE TABS DEFINING SPACES BETWEEN THEM WHICH SPACES INCREASE IN WIDTH IN TWO DIRECTIONS FROM THE APPROXIMATE TRANSVERSE CENTER LINE OF THE TABS, THE SPACING BETWEEN THE TABS BETWEEN THEIR APPROXIMATE CENTERS AND THE BAND BEING DROPLET SHAPE, THE VALVE SEAT OPENINGS CORRESPONDING IN SHAPE SUBSTANTIALLY TO THE SPINDLE-SHAPED PORTIONS OF THE TABS.
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) | 1970-04-03 | 1970-10-03 | 1971-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-03 | 1974-10-03 | 1975-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-03 | 1978-10-03 | 1979-04-04 | $7700.00 | Window Closed / Lapsed |