Patent US3842480A successfully refreshed from Google Patents.
US3842480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making guide for electrochemical drilling
Assignee: RTX Corp
•
Filing: 1973-06-28
•
Granted: 1974-10-22
•
Expires: 1993-06-28
Abstract
Abstract This invention relates to a guide for use in guiding electrodes toward and into a workpiece in an electrochemical drilling operation and to a method for making the guide.
Inventors
- 👤 W Mikulski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:05
CPC Classifications
B; B23; B23H; B23H7/00; B23H7/26; B23H7/265; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/49336; Y10T29/49339; Y10T29/49341; Y10T29/4981; Y10T29/49826; Y10T29/49838; Y10T29/49947; Y10T29/49963; Y10T29/49964; Y10T29/4998
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
97 words
In the manufacture of a guide block for electrodes in electrochemical drilling, the steps of: positioning a plurality of pins in spaced walls of a mold in predetermined relation to one another and a mounting fitting on the base of the mold between said spaced walls, casting a plastic block between said walls and around the pins and the mounting fitting, said pins forming passages therein, removing the pins from the block and the walls, removing the cast block from the walls and positioning dielectric tubes in the passages formed by the pins for guiding electrodes therein.
Claim 2
Dependent Claim
97 words
In the manufacture of a guide block for electrodes in electrochemical drilling, the steps of: positioning a plurality of pins in spaced walls of a mold in predetermined relation to one another and a mounting fitting on the base of the mold between said spaced walls, casting a plastic block between said walls and around the pins and the mounting fitting, said pins forming passages therein, removing the pins from the block and the walls, removing the cast block from the walls and positioning dielectric tubes in the passages formed by the pins for guiding electrodes therein.
Claim 3
Dependent Claim
20 words
The process of claim 1 with the additional step of threading the fitting before casting to receive an attachment screw.
Claim 4
Dependent Claim
24 words
The process of claim 1 with the added step of releasably holding the fitting on the base while the plastic is cast around it.
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) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |