Abstract:
An optical waveguide feedthrough assembly passes at least one optical waveguide through a bulk head, a sensor wall, or other feedthrough member. The optical waveguide feedthrough assembly comprises a cane-based optical waveguide that forms a glass plug sealingly disposed in a feedthrough housing. For some embodiments, the optical waveguide includes a tapered surface biased against a seal seat formed in the housing. The feedthrough assembly can include an annular gold gasket member disposed between the tapered surface and the seal seat. The feedthrough assembly can further include a backup seal. The backup seal comprises an elastomeric annular member disposed between the glass plug and the housing. The backup seal may be energized by a fluid pressure in the housing. The feedthrough assembly is operable in high temperature and high pressure environments.
Abstract:
A lateral-posterior approach sacroiliac joint stabilizing method including, as viewed from a lateral view of a pelvic region of a prone patient, forming a first incision that is anterior to a posterior sacral wall and inferior to an ala and a second incision that is located along a lateral border of the sacroiliac joint, and thereafter, forming a first void that extends from the first incision, through the ilium, across the sacroiliac joint and into the sacrum and a second void that extends between the second incision and into the sacroiliac joint. A first implant is placed within the first void such that the first implant extends across the sacroiliac joint with its distal end within the sacrum and its proximal end flush with the lateral aspect of the ilium, and a second implant is placed within the second void such that the second implant extends into the sacroiliac joint.
Abstract:
Optical sensors used in harsh environments require a sealed pressure tight passage of an optical waveguide into an interior of the sensor. In one embodiment, a pressure sensor assembly for determining the pressure of a fluid in a harsh environment includes a sensing element suspended within a fluid filled housing. An optical waveguide that provides communication with the sensing element couples to a feedthrough assembly, which includes a cane-based optical waveguide forming a glass plug sealingly disposed in the housing. The glass plug provides optical communication between the optical waveguide and the sensing element. A pressure transmitting device can transmit the pressure of the fluid to the fluid within the housing. The assembly can maintain the sensing element in a near zero base strain condition and can protect the sensing element from shock/vibration.
Abstract:
A process for precisely controlling the thickness of a heat-softenable sheet material (52) comprising heating the material to bring it to a softened condition, compressing the material while in the softened condition to the desired thickness or somewhat less and then cooling the material to a temperature below its softening point so that it sets while precisely maintained at the desired thickness. The material is cooled by passing it between substantially parallel cooling plate (32,34) rigidly spaced with a separation equal to the desired thickness of the material.
Abstract:
FIG. 1 is a perspective view of a front side of the bone screw showing my new design. FIG. 2 is a perspective view of a rear side thereof. FIG. 3 is an elevational view of the front side thereof. FIG. 4 is an elevational view of the rear side thereof. FIG. 5 is an elevational view of a first lateral side thereof. FIG. 6 is an elevational view of a second lateral side thereof. FIG. 7 is top plan view thereof; and, FIG. 8 is a bottom plan view thereof. The broken line portions of the disclosure are for illustrative purposes only and form no part of the claimed design.