US3636294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-centering tube-butting clamp
Assignee: Individual
•
Filing: 1969-12-30
•
Granted: 1972-01-18
•
Expires: 1989-12-30
Abstract
Abstract A self-centering clamp for welding, machining and checking cylindrical parts. The clamp is mounted astride two tubes butted against each other, upon which it centers and finally fixes itself. Once fixed on the tubes, the clamp permits a toothed wheel in the shape of a C to drive in rotation round the tubes, tools for welding, machining or checking same under automatic control and with programmed sequences.
Inventors
- 👤 Jean Pierre Peyrot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:53
CPC Classifications
B; B23; B23K; B23K37/00; B23K37/04; B23K37/053; B23K37/0533
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
142 words
A self-centering clamp performing work on cylindrical parts comprising two cheeks spaced from each other and articulated about a shaft; each of said cheeks including a fork having a pair of abutment means to grip the cylindrical parts; handle means operatively connected to said forks to adjust pressure and diameter of clamping; a roller mounted substantially U-shaped drum mounted for rotation about an axis passing between said abutment means of said forks longitudinally of the cylindrical parts; at least two drive means positioned in spaced driving contact with said drum; action means to perform work on the cylindrical parts, fixed to said drum for coaxial rotation therewith; conduit means connected to said action means through said drum, means on said drum to receive said conduit means; said drum, action means, and conduit means being included in the width diameter of said cheeks.
Claim 2
Dependent Claim
142 words
A self-centering clamp performing work on cylindrical parts comprising two cheeks spaced from each other and articulated about a shaft; each of said cheeks including a fork having a pair of abutment means to grip the cylindrical parts; handle means operatively connected to said forks to adjust pressure and diameter of clamping; a roller mounted substantially U-shaped drum mounted for rotation about an axis passing between said abutment means of said forks longitudinally of the cylindrical parts; at least two drive means positioned in spaced driving contact with said drum; action means to perform work on the cylindrical parts, fixed to said drum for coaxial rotation therewith; conduit means connected to said action means through said drum, means on said drum to receive said conduit means; said drum, action means, and conduit means being included in the width diameter of said cheeks.
Claim 3
Dependent Claim
71 words
The self-centering clamp of claim 1, further characterized by said abutment means including a cam abutment having a plurality of angular positions for contact with the cylindrical parts, a ball controlled by a spring positioned for holding said cam abutment in one of its plurality of angular positions; an adjustment stop contacting the cylindrical parts and projecting from the clamp, having a locking screw in contact therewith for immobilizing said stop.
Claim 4
Dependent Claim
73 words
The self-centering clamp of claim 2, further characterized by said abutment means including a further abutment on the opposite side of the cylindricAl parts from said cam abutment having a spring pressing against said further abutment, said handle means including a crank arm eccentrically positioned to lock said abutment means in working position by compression on said spring passing against said further abutment and by further compression of said spring an unlocking action.
Claim 5
Dependent Claim
38 words
The self-centering clamp of claim 1, further characterized by said handle means including a knurled knob operating a screw to move one of said abutment means in translational relation to the other of said pair of abutment means.
Claim 6
Dependent Claim
30 words
The self-centering clamp of claim 1, further characterized by some of the rollers of said roller mounted drum being in contact with said drum during all positions of said drum.
Claim 7
Dependent Claim
16 words
The self-centering clamp of claim 1, in which said action means is a TIG welding torch.
Claim 8
Dependent Claim
53 words
The self-centering clamp of claim 1, in which the distance between an electrode of said welding torch and the weld is maintained constant by means of a roller pressed against the cylindrical parts by means of an adjustable spring means stressed between a point on said drum and a point on said torch.
Claim 9
Dependent Claim
16 words
The self-centering clamp of claim 1, in which said action means is an electronic bombardment gun.
Claim 10
Dependent Claim
83 words
The self-centering clamp of claim 1, further characterized by an impulse emitter including magnetic means rigidly fixed to one of said drive means, the angular speed of said magnetic means being a multiple of that of said drive means, a pair of spaced apart blades inside a bulb under vacuum, said magnetic means passing said pair of blades at each rotation of said drive means to establish contact between said blades in a circuit controlling the sequence of cycles of said action means.
Claim 11
Dependent Claim
15 words
The self-centering clamp of claim 9 in which said magnetic means is a permanent magnet.
Claim 12
Dependent Claim
28 words
The self-centering clamp of claim 1 in which said action means is offset from said drum and said drum is located between said action means and said cheeks.
Claim 13
Dependent Claim
15 words
The self-centering clamp of claim 1 further including base means for mounting on a table.
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) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |