Abstract: A resilient expandable pressure vessel configured to function like a spring. The resilient expandable pressure vessel includes a body portion, a cavity defined within the body portion, and at least one port in communication with the cavity defined in the body portion. The at least one port is configured to receive a fluid into the cavity and discharge the fluid from the cavity. The resilient expandable pressure vessel has a predetermined expansibility across a range of operating pressures of the fluid in the cavity. The range is at least 200 psi.

Abstract: A resilient expandable pressure vessel configured to function like a spring. The resilient expandable pressure vessel includes a body portion, a cavity defined within the body portion, and at least one port in communication with the cavity defined in the body portion. The at least one port is configured to receive a fluid into the cavity and discharge the fluid from the cavity. The resilient expandable pressure vessel has a predetermined expansibility across a range of operating pressures of the fluid in the cavity. The range is at least 200 psi.

Abstract: A resilient expandable pressure vessel configured to function like a spring. The resilient expandable pressure vessel includes a body portion, a cavity defined within the body portion, and at least one port in communication with the cavity defined in the body portion. The at least one port is configured to receive a fluid into the cavity and discharge the fluid from the cavity. The resilient expandable pressure vessel has a predetermined expansibility across a range of operating pressures of the fluid in the cavity. The range is at least 200 psi.

Abstract: A bone dowel assembly for attaching a tissue to a bone includes an approximately cylindrical shank having a continuous borehole which extends axially from a free end of the shank to a second end of the shank, and two slots in the outside surface of the shank which communicate with the borehole and extend from the second end of the shank partially along its length to form reeds or tines which expand radially outwardly when an expansion part is forced into the borehole. The expansion part is conical and includes at least one aperture which extends through the expansion part transversely to the longitudinal axis of the shank. Before insertion into a hole drilled in the bone, the assembly is threaded from the free end of the shank through the borehole, out through one of the slots, past an outside portion of the expansion part, through the aperture, again past an outside portion of the expansion part, through the other slot, and back through the borehole to the free end of the shank.