US3844152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous drawing bench
Assignee: Vallourec Usines a Tubes de Lorraine Escaut SA
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Filing: 1973-01-24
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Granted: 1974-10-29
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Expires: 1993-01-24
Abstract
Abstract Bench for drawing elongated material through a die comprises a plurality of carriages, each carrying a pair of jaws for gripping the material, and crank and connecting rod means for actuating said carriages to successively advance the material through the die.
Inventors
- 👤 P Peytavin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:54
CPC Classifications
B; B21; B21C; B21C1/00; B21C1/16; B21C1/20; B21C1/27; B21C1/30
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
150 words
In a bench for drawing elongated material in which the material is drawn through a die by being successively gripped by a plurality of pairs of jaws, each mounted on an individual carriage slidable upon the framework of the machine parallel to the direction of drawing, the improved drive system in which each carriage is pivotally connected to one end of an individual connecting rod the other end of which is pivotally connected to an individual rotatably mounted crank, said drive system further comprising means causing said connecting rods to impart a substantially constant linear speed to each of said carriages during a part of the movement of that carriage during which the jaws mounted on that carriage exert traction on the material being drawn, and means driving all of said cranks synchronously, with each of said cranks being angularly spaced from the next crank by the same angular distance.
Claim 2
Dependent Claim
150 words
In a bench for drawing elongated material in which the material is drawn through a die by being successively gripped by a plurality of pairs of jaws, each mounted on an individual carriage slidable upon the framework of the machine parallel to the direction of drawing, the improved drive system in which each carriage is pivotally connected to one end of an individual connecting rod the other end of which is pivotally connected to an individual rotatably mounted crank, said drive system further comprising means causing said connecting rods to impart a substantially constant linear speed to each of said carriages during a part of the movement of that carriage during which the jaws mounted on that carriage exert traction on the material being drawn, and means driving all of said cranks synchronously, with each of said cranks being angularly spaced from the next crank by the same angular distance.
Claim 3
Dependent Claim
19 words
Drawing bench as claimed in claim 1 which comprises three jaw-carrying carriages actuated by three cranks spaced 120* apart.
Claim 4
Dependent Claim
42 words
Drawing bench as claimed in claim 1 in which each crank and connecting rod system is driven from a shaft rotating at a constant speed through a universal joint the two shafts of which are angularly spaced with respect to each other.
Claim 5
Dependent Claim
46 words
Drawing bench as claimed in claim 1 in which each connecting rod used to actuate a carriage is made in two parts pivotally connected to each other at a point which is connected by another rod to another crank driven in synchronism with the first crank.
Claim 6
Dependent Claim
43 words
Drawing bench as claimed in claim 1 in which the angular movement of each connecting rod with respect to the carriage which it actuates causes the automatic opening and closing of the jaws on that carriage which grip the product to be drawn.
Claim 7
Dependent Claim
42 words
Drawing bench as claimed in claim 5 in which there is a crankpin fixed to each connecting rod at the point of its articulation to its carriage, which crankpin actuates linkage controlling the movements of the jaws with respect to the carriage.
Claim 8
Dependent Claim
49 words
Drawing bench as claimed in claim 6 in which said linkage comprises a composite link positioned between two articulated levers, which link may be elongated by compressing a spring, one of the ends of said link being axially slidable in its point of attachment to one of the levers.
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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |