US3220277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Worm gear jack
Assignee: Duff Norton Co Inc
•
Filing: 1963-05-20
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Granted: 1965-11-30
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Expires: 1983-05-20
Abstract
No abstract record available.
Inventors
- 👤 John J Dixon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:56
CPC Classifications
B; B66; B66F; B66F3/00; B66F3/08; B66F3/18; F; F16; F16H; F16H25/00; F16H25/18; F16H25/20; F16H2025/2062; F16H2025/209; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576; Y10T74/18712; Y10T74/1872; Y10T74/18728; Y10T74/19; Y10T74/19623; Y10T74/19991
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A PRECISION WORM GEAR JACK COMPRISING, IN COMBINATION, A HOUSING, A WORM SUPPORTED THEREBY, A WORM GEAR, HAVING A CENTRAL THREADED OPENING, A POWER OUTPUT SCREW HAVING A THREAD INTERFITTING WITH THE WORM GEAR THREADED CENTRAL OPENING, A SHELL CAP FOR THE HOUSING, SAID SHELL CAP HAVING A THREADED RECESSED CYLINDRICAL PORTION, MEANS DEFINING A CYLINDRICAL THREADED PORTION IN THE HOUSING COAXIAL WITH THE POWER OUTPUT SCREW, LOAD BEARINGS COAXIAL WITH THE POWER OUTPUT SCREW AND FLANKING THE WORM GEAR, HOUSING SEAT MEANS FOR ONE OF THE LOAD BEARINGS, A LOAD BEARING SEAT ON THE SHELL CAP CENTRAL OF ITS THREADED CYLINDRICAL PORTION, AND MEANS FOR SETTING THE SHELL CAP AGAINST ROTATION AFTER THREADEDLY ENGAGING THE SAME WITH THE HOUSING WHEREBY THE SHELL CAP SERVES TO COMPRESS THE LOAD BEARINGS TO MINIMIZE BACKLASH ALONG THE LIFTING SCREW AXIS.
Claim 2
Dependent Claim
138 words
A PRECISION WORM GEAR JACK COMPRISING, IN COMBINATION, A HOUSING, A WORM SUPPORTED THEREBY, A WORM GEAR, HAVING A CENTRAL THREADED OPENING, A POWER OUTPUT SCREW HAVING A THREAD INTERFITTING WITH THE WORM GEAR THREADED CENTRAL OPENING, A SHELL CAP FOR THE HOUSING, SAID SHELL CAP HAVING A THREADED RECESSED CYLINDRICAL PORTION, MEANS DEFINING A CYLINDRICAL THREADED PORTION IN THE HOUSING COAXIAL WITH THE POWER OUTPUT SCREW, LOAD BEARINGS COAXIAL WITH THE POWER OUTPUT SCREW AND FLANKING THE WORM GEAR, HOUSING SEAT MEANS FOR ONE OF THE LOAD BEARINGS, A LOAD BEARING SEAT ON THE SHELL CAP CENTRAL OF ITS THREADED CYLINDRICAL PORTION, AND MEANS FOR SETTING THE SHELL CAP AGAINST ROTATION AFTER THREADEDLY ENGAGING THE SAME WITH THE HOUSING WHEREBY THE SHELL CAP SERVES TO COMPRESS THE LOAD BEARINGS TO MINIMIZE BACKLASH ALONG THE LIFTING SCREW AXIS.
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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) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |