Automatic stake sharpening apparatus
Abstract
Abstract APPARATUS IS PROVIDED FOR SERIALLY ADVANCING STAKE BLANKS FROM AN ADJUSTABLE HOPPER UTILIZING A HYDRAULIC RAM. AS EACH STAKE IS ADVANCED TO A SHARPENING POSITION, A HYDRAULIC CLAMP HOLDS THE STAKE WHILE IT RECEIVES FIRST AND SECOND ANGULAR CUTS IN SEQUENCE TO EFFECT THE SHARPENING. AFTER THE SEQUENTIAL CUTS ARE COMPLETED, THE HYDRAULIC CLAMP WITHDRAWS TO PERMIT THE SHARPENED STAKE TO BE EJECTED AS THE HYDRAULIC RAM PUSHES THE NEXT BLANK INTO POSITION. THE ANGULAR CUTS ARE ACHIEVED BY HYDRAULICALLY ADVANCING MOTOR DRIVEN CIRCULAR SAWS ONE AT A TIME TO AVOID INTERFERENCE WITH ONE ANOTHER. THE SEQUENCE OF OPERATION IS CONTROLLED BY A LOGICAL COMBINATION OF SWITCHES ACTUATED BY THE VARIOUS MOVING PARTS WHICH FUNCTION TO SELECTIVELY ENERGIZE AND DE-ENERGIZE SOLENOIDS CONTROLLING FLUID FLOW AND RETENTION TO THE SEVERAL HYDRAULIC ELEMENTS. D R A W I N G
Inventors
- 👤 M Tracy
Bibliographic Details
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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) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |