Patent US3310230A successfully refreshed from Google Patents.
US3310230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic gas seal system for pistontype gas compressor
Assignee: Chicago Pneumatic Tool Co LLC
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Filing: 1965-09-22
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Granted: 1967-03-21
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Expires: 1985-09-22
Abstract
No abstract record available.
Inventors
- 👤 Richard C Wirth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:12
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/04; F04B39/041; F16; F16J; F16J15/00; F16J15/16; F16J15/40; Y; Y10; Y10S; Y10S277/00; Y10S277/927
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
227 words
A PISTON-TYPE GAS COMPRESSOR APPARATUS COMPRISING A CRANK CASE SECTION, A COMPRESSOR HEAD SECTION, A PISTON RECIPROCABLE IN THE COMPRESSOR HEAD SECTION HAVING A PISTON ROD EXTENDING INTO THE CRANKCASE SECTION, A CRANK SUPPORTED IN THE CRANKCASE SECTION DRIVINGLY CONNECTED TO THE PISTON ROD, AND A HYDRAULIC GAS SEAL SYSTEM FOR SEALING THE COMPRESSOR HEAD SECTION AGAINST LEAKAGE OF GAS AROUND THE PISTON ROD INTO THE CRANKCASE SECTION, THE HYDRAULIC GAS SEAL SYSTEM COMPRISING: A FALSE HEAD MOUNTED TRANSVERSELY OF THE COMPRESSOR APPARATUS PARTITIONING THE COMPRESSOR HEAD SECTION FROM THE CRANKCASE SECTION, A CAVITY AXIALLY OF THE FALSE HEAD SURROUNDING THE PISTON ROD, FIRST SEALING MEANS ABOUT THE PISTON ROD SEALING ONE END OF THE CAVITY FROM THE COMPRESSOR HEAD SECTION, OTHER SEALING MEANS ABOUT THE PISTON ROD SEALING AN OPPOSITE END OF THE CAVITY FROM THE CRANKCASE SECTION, A HYDRAULIC SUMP WITHIN THE CRANKCASE ADJACENT THE CORRESPONDING END OF THE FALSE HEAD, MEANS FOR CIRCULATING HYDRAULIC FLUID FROM THE SUMP THROUGH THE CAVITY AROUND THE PISTON ROD AND BACK TO THE SUMP, AND CONTROL MEANS FOR MAINTAINING THE FLUID CIRCULATING THROUGH THE CAVITY AT A PRESSURE GREATER THAN THAT OF GAS IN THE COMPRESSOR HEAD SECTION, WHEREIN THE FIRST AND OTHER SEALING MEANS ARE OF SOFT RESILIENT MATERIAL AND PROVIDE TOGETHER WITH THE HYDRAULIC FLUID THE SOLE CONTACT WITH THE PISTON ROD WITHIN THE FALSE HEAD.
Claim 2
Dependent Claim
227 words
A PISTON-TYPE GAS COMPRESSOR APPARATUS COMPRISING A CRANK CASE SECTION, A COMPRESSOR HEAD SECTION, A PISTON RECIPROCABLE IN THE COMPRESSOR HEAD SECTION HAVING A PISTON ROD EXTENDING INTO THE CRANKCASE SECTION, A CRANK SUPPORTED IN THE CRANKCASE SECTION DRIVINGLY CONNECTED TO THE PISTON ROD, AND A HYDRAULIC GAS SEAL SYSTEM FOR SEALING THE COMPRESSOR HEAD SECTION AGAINST LEAKAGE OF GAS AROUND THE PISTON ROD INTO THE CRANKCASE SECTION, THE HYDRAULIC GAS SEAL SYSTEM COMPRISING: A FALSE HEAD MOUNTED TRANSVERSELY OF THE COMPRESSOR APPARATUS PARTITIONING THE COMPRESSOR HEAD SECTION FROM THE CRANKCASE SECTION, A CAVITY AXIALLY OF THE FALSE HEAD SURROUNDING THE PISTON ROD, FIRST SEALING MEANS ABOUT THE PISTON ROD SEALING ONE END OF THE CAVITY FROM THE COMPRESSOR HEAD SECTION, OTHER SEALING MEANS ABOUT THE PISTON ROD SEALING AN OPPOSITE END OF THE CAVITY FROM THE CRANKCASE SECTION, A HYDRAULIC SUMP WITHIN THE CRANKCASE ADJACENT THE CORRESPONDING END OF THE FALSE HEAD, MEANS FOR CIRCULATING HYDRAULIC FLUID FROM THE SUMP THROUGH THE CAVITY AROUND THE PISTON ROD AND BACK TO THE SUMP, AND CONTROL MEANS FOR MAINTAINING THE FLUID CIRCULATING THROUGH THE CAVITY AT A PRESSURE GREATER THAN THAT OF GAS IN THE COMPRESSOR HEAD SECTION, WHEREIN THE FIRST AND OTHER SEALING MEANS ARE OF SOFT RESILIENT MATERIAL AND PROVIDE TOGETHER WITH THE HYDRAULIC FLUID THE SOLE CONTACT WITH THE PISTON ROD WITHIN THE FALSE HEAD.
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) | 1970-03-20 | 1970-09-19 | 1971-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-20 | 1974-09-19 | 1975-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-20 | 1978-09-19 | 1979-03-21 | $7700.00 | Window Closed / Lapsed |