US3609631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable ground clamp
Assignee: Individual
•
Filing: 1969-01-23
•
Granted: 1971-09-28
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Expires: 1989-01-23
Abstract
Abstract A ground clamp for a pipe-welding apparatus includes an arcuate support member positionable upon and insulated from the work to be welded and flexible chain or cable means attachable to the support frame, and adjustable and lockable to secure the ground clamp into position upon the work. The support frame includes a sharply pointed grounding member biasable against the work to be grounded and having one end in ground connection to the welding apparatus. The ends of the ground clamp resting upon the work includes insulating members to insulate the frame from the work and the point of connection of the flexible chain or cable may also include insulating means to insulate the chain or cable from the work.
Inventors
- 👤 Robert L Looney
- 👤 John S Work
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:29
CPC Classifications
H; H01; H01R; H01R4/00; H01R4/58; H01R4/64; H01R4/643
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
66 words
A ground clamp comprising: an arcuate support frame, positionable to fit circumferentially of work to be welded, flexible adjustable means attachable to said support frame to hold said clamp securely in position, ground means on said support frame to provide grounding contact therewith, means biasing said ground means against said work, and insulating means on said support frame to insulate said support frame from said work.
Claim 2
Dependent Claim
66 words
A ground clamp comprising: an arcuate support frame, positionable to fit circumferentially of work to be welded, flexible adjustable means attachable to said support frame to hold said clamp securely in position, ground means on said support frame to provide grounding contact therewith, means biasing said ground means against said work, and insulating means on said support frame to insulate said support frame from said work.
Claim 3
Dependent Claim
36 words
A ground clamp as described in claim 1 wherein: said flexible means includes a chain or cable, said chain or cable having lockable means at an end thereof to cooperate with lockable means on said frame.
Claim 4
Dependent Claim
30 words
A ground clamp as described in claim 2 wherein: said arcuate support frame includes said insulating means adjacent a first end and adjacent a second end of said support frame.
Claim 5
Dependent Claim
59 words
A ground clamp as described in claim 3 wherein: said insulating means includes first and second insulating members adjacent first and second ends of said support frame to insulate said support frame from said work, and third and fourth insulating members adjacent said first and second ends of said support frame to insulate said flexible means from said work.
Claim 6
Dependent Claim
54 words
A ground clamp as described in claim 2 wherein: said support frame has an opening therein oriented toward said work when said support frame is in said position, and said ground means includes a grounding member disposed in said opening, said grounding member being sharply pointed to provide intimate grounding contact with said work.
Claim 7
Dependent Claim
83 words
A ground clamp as described in claim 3 wherein: said grounding means further includes a coil spring disposed around said grounding member to bias said grounding member toward said work when said support frame is in said position, and said grounding member receives threadably a nut adjacent an end remote from said sharp point to provide for adjustment of said grounding member, and said grounding member further includes means at said end remote from said sharp point for attachment of a ground wire.
Claim 8
Dependent Claim
33 words
A ground clamp as described in claiM 6 wherein: said first and second insulating members are pivotally attached to said support frame to provide adjustable positioning of said support frame on said work.
Claim 9
Dependent Claim
21 words
A ground clamp as described in claim 6 wherein: said grounding member includes a replaceable ground tip having said sharp point.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |