James Brian Carson

US Patent:

43555250, Oct 26, 1982

Filed:

Sep 4, 1979

Appl. No.:

6/072455

Inventors:

James W. Carson - Fayetteville AR

International Classification:

B21D 704
B21D 905

US Classification:

72149

Abstract:

There is disclosed a tube bending machine with a rotatable die having a tubing clamp associated therewith and a stationary wiper block to bend a tubing work piece around the die as it rotates. The wiper block and tubing clamp are placed into and locked in operative position with similar toggle linkages which are adjustable to accommodate different bending dies and wiper blocks. The die is rotated by a fluid pressure linear actuator chain driving a sprocket secured to a common shaft with the die; the chain is pinned at one end to the sprocket and the sprocket has a torsion spring connected thereto applying tension to the chain and causing the die to return when the actuator moves to slacken the chain. An adjustable stop limits the travel of the actuator shaft and a pointer which moves with the stop reads against a scale to directly indicate degree of bend. The actuator is operated on the bend stroke by a pilot valve operated by the wiper block toggle mechanism; the pilot valve operates the main valve controlling the linear actuator.

US Patent:

42575834, Mar 24, 1981

Filed:

Feb 29, 1980

Appl. No.:

6/125870

Inventors:

James W. Carson - Fayetteville AR

International Classification:

B25B 114

US Classification:

269 32

Abstract:

There is disclosed a clamping device primarily for clamping workpieces in production forming presses or other production tools which includes a toggle mechanism powered by an air cylinder or other power actuator and cooperating in tandem with a hand toggle mechanism; the hand toggle mechanism provides a short travel at a very high force for the moving one of a pair of clamping jaws. The hand toggle mechanism must be moved through its travel to a locked position to actuate the powered toggle mechanism and preferably a valve or other control for the power actuator is positioned to operate upon locking of the hand toggle mechanism. The hand toggle mechanism is spring biased to unlock and open after the locking force imparted by the power toggle mechanism has been released. The release of the power toggle mechanism is by a hand operated valve or a press operated valve so that manual opening of the clamping jaws is not required on the part of the operator.