US3374776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-stroke internal combustion engine
Assignee: VILLIERS ENGINEERING Co Ltd
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Filing: 1966-09-27
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Granted: 1968-03-26
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Expires: 1986-09-27
Abstract
No abstract record available.
Inventors
- 👤 Hooper Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:08
CPC Classifications
F; F02; F02B; F02B75/00; F02B75/16; F02B25/00; F02B75/02; F02B2075/022; F02B2075/025; F02B2700/00; F02B2700/03; F02B2700/034; F02B2700/037
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
203 words
A TWO-STROKE INTERNAL COMBUSTION ENGINE EMPLOYEDING CRANK CASE COMPRESSION AND INCLUDING A CYLINDER, A PISTON RECIPROCABLE IN THE CYLINDER, A CRANK CASE DEFINING A CRANK CHAMBER, A CRANK SHAFT ROTATABLY MOUNTED BY MAIN JOURNAL MEANS IN THE CRANK CASE AND CONNECTED TO THE PISTON TO FORM AN ASSEMBLY, MAIN TRANSFER PASSAGE MEANS BETWEEN THE CRANK CHAMBER AND THE CYLINDER FOR TRANSFERRING THE CHARGE THEREBETWEEN AND AUXILIARY TRANSFER PASSAGE MEANS IN SAID MAIN JOURNAL MEANS TO PASS THE CHARGE FROM THE CRANK CHAMBER TO THE MAIN TRANSFER PASSAGE MEANS, AND WHEREIN DURING THE MAJOR PORTIONS OF THE TIME DURING WHICH TRANSFER OF THE CHARGE FROM THE CRANK CHAMBER TO THE CYLINDER OCCURS, TWO PATHS FOR THE CHARGE FROM THE CHAMBER INTO THE MAIN TRANSFER PASSAGE MEANS APART FROM THE NORMAL WORKING CLEARANCE BETWEEN THE PISTON AND THE CYLINDER, THE FIRST OF SAID PATHS BEING THROUGH THE AUXILIARY TRANSFER PASSAGE MEANS AND THE SECOND OF SAID PATHS COMPRISING A SMALL CLEARANCE BETWEEN THE CRANK SHAFT AND PISTON ASSEMBLY AND STATIONARY ABUTMENT MEANS OF THE ENGINE, THE RELATION BETWEEN THE RESTRICTIONS OFFERED TO GAS FLOW BY THE TWO PATHS BEING SUCH THAT THE MAJOR PART OF THE CHARGE FLOWS THROUGH THE AUXILIARY PASSAGE MEANS DURING TRANSFER.
Claim 2
Dependent Claim
203 words
A TWO-STROKE INTERNAL COMBUSTION ENGINE EMPLOYEDING CRANK CASE COMPRESSION AND INCLUDING A CYLINDER, A PISTON RECIPROCABLE IN THE CYLINDER, A CRANK CASE DEFINING A CRANK CHAMBER, A CRANK SHAFT ROTATABLY MOUNTED BY MAIN JOURNAL MEANS IN THE CRANK CASE AND CONNECTED TO THE PISTON TO FORM AN ASSEMBLY, MAIN TRANSFER PASSAGE MEANS BETWEEN THE CRANK CHAMBER AND THE CYLINDER FOR TRANSFERRING THE CHARGE THEREBETWEEN AND AUXILIARY TRANSFER PASSAGE MEANS IN SAID MAIN JOURNAL MEANS TO PASS THE CHARGE FROM THE CRANK CHAMBER TO THE MAIN TRANSFER PASSAGE MEANS, AND WHEREIN DURING THE MAJOR PORTIONS OF THE TIME DURING WHICH TRANSFER OF THE CHARGE FROM THE CRANK CHAMBER TO THE CYLINDER OCCURS, TWO PATHS FOR THE CHARGE FROM THE CHAMBER INTO THE MAIN TRANSFER PASSAGE MEANS APART FROM THE NORMAL WORKING CLEARANCE BETWEEN THE PISTON AND THE CYLINDER, THE FIRST OF SAID PATHS BEING THROUGH THE AUXILIARY TRANSFER PASSAGE MEANS AND THE SECOND OF SAID PATHS COMPRISING A SMALL CLEARANCE BETWEEN THE CRANK SHAFT AND PISTON ASSEMBLY AND STATIONARY ABUTMENT MEANS OF THE ENGINE, THE RELATION BETWEEN THE RESTRICTIONS OFFERED TO GAS FLOW BY THE TWO PATHS BEING SUCH THAT THE MAJOR PART OF THE CHARGE FLOWS THROUGH THE AUXILIARY PASSAGE MEANS DURING TRANSFER.
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) | 1971-03-26 | 1971-09-25 | 1972-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-26 | 1975-09-25 | 1976-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-26 | 1979-09-25 | 1980-03-26 | $7700.00 | Window Closed / Lapsed |