US3909388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-controlled spring-actuated tool advance for electrochemical machining
Assignee: United States Department of the Navy
•
Filing: 1974-12-09
•
Granted: 1975-09-30
•
Expires: 1994-12-09
Abstract
Abstract A device used in an electrochemical machining trepanning operation wherein a hollow electrode comprises two longitudinally adjacent segments. Attached to one of the segments are a plurality of spacer means for maintaining a gap between the electrode and the workpiece. An insulating member and a spring controlled rod prevent short-circuiting of the electrode.
Inventors
- 👤 Charles L Faust
- 👤 John A Gurklis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:16
CPC Classifications
F; F42; F42B; F42B33/00; F42B33/06; B; B23; B23H; B23H3/00
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
104 words
A TREPANNING ELECTRODE ADAPTED TO BE USED IN AN ELECTROCHEMICAL MACHINING OPERATION COMPRISING: A HOLLOW BODY, SAID BODY COMPRISING FIRST AND SECOND LONGITUDNALLY ADJACENT HOLLOW SEGMENTS, A SPRING MEANS FOR CONTROLLING ADVANCEMENT OF THE ELECTRODE TOWARDS A WORKPIECE, SAID SPRING MEANS BEING POSITIONED ON SAID FIRST BODY SEGMENT, SPACER MEANS FOR SEPARATING SAID ELECTRODE FROM SAID WORKPIECE, SAID SPACER MEANS BEING POSITIONED ON SAID SECOND BODY SEGMENT IN SUCH A MANNER AS TO OPPOSE ADVANCING FORCE EXERTED BY SAID SPRING MEANS, AND INSULATING MEANS POSITIONED ON THE INSIDE OF SAID SECOND SEGMENT FOR PREVENTING CONTACT BETWEEN MATERIAL REMOVED FROM SAID WORKPIECE AND SAID ELECTRODE.
Claim 2
Dependent Claim
104 words
A TREPANNING ELECTRODE ADAPTED TO BE USED IN AN ELECTROCHEMICAL MACHINING OPERATION COMPRISING: A HOLLOW BODY, SAID BODY COMPRISING FIRST AND SECOND LONGITUDNALLY ADJACENT HOLLOW SEGMENTS, A SPRING MEANS FOR CONTROLLING ADVANCEMENT OF THE ELECTRODE TOWARDS A WORKPIECE, SAID SPRING MEANS BEING POSITIONED ON SAID FIRST BODY SEGMENT, SPACER MEANS FOR SEPARATING SAID ELECTRODE FROM SAID WORKPIECE, SAID SPACER MEANS BEING POSITIONED ON SAID SECOND BODY SEGMENT IN SUCH A MANNER AS TO OPPOSE ADVANCING FORCE EXERTED BY SAID SPRING MEANS, AND INSULATING MEANS POSITIONED ON THE INSIDE OF SAID SECOND SEGMENT FOR PREVENTING CONTACT BETWEEN MATERIAL REMOVED FROM SAID WORKPIECE AND SAID ELECTRODE.
Claim 3
Dependent Claim
29 words
The trepanning electrode of claim 1 including a rod for preventing contact between material removed from said workpiece and said electrode, said rod being positioned longitudinally within said electrode.
Claim 4
Dependent Claim
42 words
The trepanning electrode of claim 2 wherein said rod has on one end a spring for maintaining said rod in position within said electrode and on the other end adhesive for holding material removed from said workpiece during the electrochemical machining operation.
Claim 5
Dependent Claim
21 words
The trepanning electrode of claim 2 including a grommet positioned on said first segment for maintaining said rod spring in position.
Claim 6
Dependent Claim
18 words
The trepanning electrode of claim 1 including electrolyte entrance and exit means whereby electrolyte flows through said electrode.
Claim 7
Dependent Claim
29 words
The trepanning electrode of claim 5 wherein said electrolyte entrance means is positioned on said first body segment and said electrolyte exit means is positioned on said second segment.
Claim 8
Dependent Claim
67 words
The trepanning electrode of claim 1 including a housing for said electrode, said housing comprising: frame means positioned about said electrode; sealing rings positioned between said frame means and said workpiece for preventing electrolyte leakage; a plurality of O-rings positioned around said electrode second segment between said electrode and said housing means; electrolyte entrance means through said frame means; and electrolyte exit means through said frame means.
Claim 9
Dependent Claim
30 words
The trepanning electrode of claim 7 wherein said frame means comprises at least two segments, a first segment comprising a support spider and a second segment comprising a support canister.
Claim 10
Dependent Claim
18 words
The trepanning electrode of claim 1 wherein said first and second longitudinal segments are separable from each other.
Claim 11
Dependent Claim
17 words
The trepanning electrode of claim 9 wherein said first and second longitudinal segments are threadably connected together.
Claim 12
Dependent Claim
22 words
The trepanning electrode of claim 1 wherein said insulating members are triangular and positioned longitudinally along the inside of said second segment.
Claim 13
Dependent Claim
13 words
The trepanning electrode of claim 1 wherein said spacer means are conical pegs.
Claim 14
Dependent Claim
13 words
The trepanning electrode of claim 1 wherein said spacer means are triangular pegs.
Claim 15
Dependent Claim
16 words
The trepanning electrode of claim 1 wherein said spacer means are manufactured from a glass-filled plastic.
Claim 16
Dependent Claim
18 words
The trepanning electrode of claim 1 wherein said spacer means are manufactured from a fiber reinforced plastic material.
Claim 17
Dependent Claim
14 words
The trepanning electrode of claim 1 wherein said spacer means are manufactured from quartz.
Claim 18
Dependent Claim
12 words
The trepanning electrode of claim 1 wherein said spacer means are removable.
References Cited (Backward Citations)
US3330754A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |