MS. HONG LIU, L.AC.
Acupuncture at Bascom Ave, San Jose, CA

5650569, Jul 22, 1997

Jul 26, 1995

8/507788

Hong S. Liu - San Jose CA

B06B 300

73663

A skewed, multi-axis vibration fixture supports a device as it undergoes vibration testing simultaneously along three mutually orthogonal axes. A base surface of the fixture is juxtaposed with and coupled to a vibrating surface which shakes along a pre-established vibration axis. A device mounting surface is rigidly coupled to the base surface in a pre-established fixed, skewed angular relationship. The device mounting surface receives and rigidly secures a device as it undergoes vibration testing. The device mounting surface secures the device at an invariable, skewed angle with respect to the vibration axis. Consequently, uniaxial shaking of the vibrating surface is coupled through the fixture to the device mounting surface and is decomposed into shaking along each of the device's three mutually orthogonal axes. The invariable, skewed angular relationship between the device and the vibration axis establishes fixed, pre-established ratios between the shaking along pairs of the device's mutually orthogonal axes. The planar device mounting surface is preferably formed as small as possible to match the shape of the device being tested.

5644087, Jul 1, 1997

Jun 20, 1996

8/667094

Hong S. Liu - San Jose CA

B06B 300

73663

A rotational shock/vibration fixture that adapts a rectilinear shock or vibration apparatus for applying a rotary shock or vibration to a device undergoing test. A rotatable device-mounting-plate, enclosed within a rigid box, receives the device. A pair of diametrically opposed bearings support the box within a frame for movement about a rotation axis. Coil springs stretching between the box and the frame establish a rest orientation for the box with respect to the frame, and dampens oscillations of the box. A reduced backlash linkage between the box to the rectilinear shock or vibration apparatus couples rectilinear movement of the shock or vibration apparatus into rotary shock or vibration of the box. The reduced-backlash linkage may include a lever arm for mechanically amplifying shock applied by the shock or vibration apparatus.

5948987, Sep 7, 1999

Jun 25, 1997

8/882553

Hong S. Liu - San Jose CA

B06B 300

73663

A rotational shock fixture, energized by an impulsive driver, applies a rotary shock to a device undergoing test. A rotatable device-mounting-plate, enclosed within a rigid box, receives the device. A pair of diametrically opposed bearings support the box within a frame for movement about a rotation axis. A brake, coupled to the rotatable device-mounting-plate abruptly stops the rotatable device-mounting-plate from whirling about the rotation axis thereby applying the rotary shock to the device. Optional coil springs, stretching between the box and the frame, establish a rest orientation for the box with respect to the frame, and dampens oscillations of the box.