| DYNAMIC SYSTEMS, INC. Patent applications |
| Patent application number | Title | Published |
|---|
| 20090139344 | Apparatus for a cam-based jack assembly for use in materials, testing machines and an accompanying method for use therewith - A jack assembly, for use in a materials testing system, utilizes both a cam and a resilient push block. The cam, having an progressive eccentric, is situated between the push block and a jaw housing and located partially within a corresponding shallow channel in each such that both channels effectively straddle the cam. The channels accommodate axial rotation of the cam. The push block is formed of a material with an appropriate modulus of elasticity such that bending moments, particularly at ends of the push block and resulting from axial rotation of the eccentric to its top dead-center position, cause the channel in the push block to elastically deform and increasingly and sufficiently deflect against and around the eccentric, thus increasingly pinching the eccentric and securely locking the cam, push block and specimen grip in their proper positions. | 06-04-2009 |
| 20090139343 | Specimen grip, having a grip shell, for use in a materials testing machine - A specimen grip assembly which can be used with a relatively light-weight jaw in a materials testing system. The specimen grip assembly illustratively contains a grip shell and a pair of wedge-shaped specimen grips. The shell has a truncated, frusto-pyramidal exterior shape with two outwardly facing inclined surfaces, both inclined at an angle and which matingly abut and slide against complementary inclined interior surfaces of the jaw. The grips are oriented in a recess within the shell such that inclined surfaces of the grips abut against interior complementary surfaces of the shell. The shell, containing the grips and specimen, is suitably positioned within the jaw, with the shell and grips then jacked into a fixed position. The shell substantially eliminates any noticeable compliance from the specimen grips that might otherwise arise from tensile and/or compressive forces applied to the jaw and specimen grip assemblies during a test program. | 06-04-2009 |
