US3851557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutting apparatus with work clamp
Assignee: Individual
•
Filing: 1973-11-01
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Granted: 1974-12-03
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Expires: 1993-11-01
Abstract
Abstract Cutting apparatus for obliquely cutting elongate workpieces of substantial dimensions such as girders comprises a frame which supports a circular saw for rotation about a horizontal axis. Opposed to the saw is a workpiece locating and clamping device having two sets of clamping jaws which are spaced apart by a distance just sufficient to enable the saw to pass therebetween. The clamping device and the saw are pivotal about vertical axes and means are provided for coordinating this pivotal movement so that the inclination of the saw required for producing a particular angle of cut coincides with the inclination of the gap between the two sets of jaws.
Inventors
- 👤 J Vierstraete
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:48
CPC Classifications
B; B23; B23D; B23D45/00; B23D45/14; B23D47/00; B23D47/04; Y; Y10; Y10T; Y10T83/00; Y10T83/748; Y10T83/7487; Y10T83/7493; Y10T83/7547; Y10T83/7573; Y10T83/758; Y10T83/768; Y10T83/7755; Y10T83/7763; Y10T83/7768; Y10T83/869; Y10T83/8773
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
152 words
Cutting apparatus capable of producing an oblique transverse cut in an elongate workpiece, comprising a frame supporting a circular saw rotatable about a horizontal axis, and an angularly movable device for locating and clamping the workpiece in horizontal and vertical directions, the saw being movable about its diametral vertical axis which is perpendicular to and intersects with the longitudinal axis of the workpiece in the cutting position, the clamping device comprising at least one set of jaws with fixed clamping surfaces, means being provided for coordinating angular movement of the clamping device and the saw so that, even with large cutting angles, the saw is always located as near as possible to the set of jaws, said jaws being movable independently to clamp the workpiece, after the saw and jaws have been adjusted into the required attitude for a desired angle of cut, without causing any rotation or deformation of the workpiece.
Claim 2
Dependent Claim
152 words
Cutting apparatus capable of producing an oblique transverse cut in an elongate workpiece, comprising a frame supporting a circular saw rotatable about a horizontal axis, and an angularly movable device for locating and clamping the workpiece in horizontal and vertical directions, the saw being movable about its diametral vertical axis which is perpendicular to and intersects with the longitudinal axis of the workpiece in the cutting position, the clamping device comprising at least one set of jaws with fixed clamping surfaces, means being provided for coordinating angular movement of the clamping device and the saw so that, even with large cutting angles, the saw is always located as near as possible to the set of jaws, said jaws being movable independently to clamp the workpiece, after the saw and jaws have been adjusted into the required attitude for a desired angle of cut, without causing any rotation or deformation of the workpiece.
Claim 3
Dependent Claim
24 words
Cutting apparatus as claimed in claim 1, having two sets of jaws spaced apart just sufficiently to allow the passage of the saw therebetween.
Claim 4
Dependent Claim
92 words
Cutting apparatus as claimed in claim 2, wherein the clamping device and the saw are mounted on respective turrets, each set of jaws comprising six independent jaws some of which effect vertical clamping and have plane gripping surfaces and other of which effect horizontal clamping and have cylindrical gripping surfaces with a vertical axis, said jaws serving to locate the workpiece initially vertically and then horizontally, clamping occurring only after the workpiece is located by all the jaws, locking of the horizontal clamping jaws occurring after locking of the vertically clamping jaws.
Claim 5
Dependent Claim
70 words
Cutting apparatus as claimed in claim 3, wherein the means for coordinating the angular movements of the clamping device and the saw comprises a mechanical coupling consisting of a vertical shaft at each of whose ends is a pinion meshing with a ring of teeth on the respective turret, the two rings of teeth, on the one hand, and the two pinions on the other hand, having the same diameters.
Claim 6
Dependent Claim
43 words
Cutting apparatus as claimed in claim 3, wherein each set of six jaws comprises upper and lower pairs of jaws for vertical clamping of the edges of the workpiece and one pair of jaws for horizontal clamping of the edges of the workpiece.
Claim 7
Dependent Claim
57 words
Cutting apparatus as claimed in claim 5, wherein each upper vertical clamping jaw is integral with a respective one of the horizontal clamping jaw and may slide vertically on the latter in appropriate slides each upper vertical jaw and the clamping surface of the associated horizontal clamping jaw forming a single right-angled member which can move horizontally.
Claim 8
Dependent Claim
21 words
Cutting apparatus as claimed in claim 6, wherein the jaws are moved by hydraulic jacks in dependence upon a control device.
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) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |