Other

Accuray Inc.

Douglas A Bourne

Kirk Joseph Bertsche

Mark Trail

A linear accelerator target apparatus includes a target material to produce radiation upon being struck by electrons accelerated by a linear accelerator and a target holder assembly to which the target material is attached. The target holder assembly includes a cooling channel disposed around a perimeter of the target material. The target holder assembly is configured to be detachably coupled to a housing of the linear accelerator. The target apparatus further includes a protective window coupled to the target holder assembly over the target material.

Field replaceable, disposable, and thermally optimized X-ray target with integral beam current monitoring

A trip valve operator for actuating quarter turn valves comprises a return actuator, multi-stage leverage means for reducing the trigger load, a trigger, and one or more sensors or other trip actuators. The multi-stage leverage means comprises pivotally connected levers in series which form a compact mechanism, variously taking the form of four bar linkage or concatenated four bar linkage, that produces high leverage and low frictional holding torques at the reset position for reliable triggering, and that accommodates quarter turn actuation and can be single action reset. The operating areas of the successive stages of leverage overlap. Other multi-stage leverage means includes a leveraging release lever in which the short leverage arm has a land which lies in a radial plane with respect to the mounting pivot thereof for engaging a previous stage of leverage. Reset is provided by arm means which re-engage near the reset position. The trip valve operator can include by-pass means comprising a two degree of freedom linkage or a floating lever. An omnidirectional, switched resonating seismic sensor and transducer is combined with the trip valve operator to form a seismic sensitive valve. The sensor comprises a mass element which can move in a horizontal plane, an omnidirectional spring network, a two degree of freedom ball bearing having means for preserving the alignment thereof, and a sliding frictional damper. The transducer converts the two degree of freedom motion of the mass element into a trigger throw and comprises a conical cam and a follower.

Universal trip valve operators and trip actuating seismic vibration

A spring return valve operator for actuating a valve is comprised of a spring return actuator which is loadmatched to a valve load and extracts a large fraction of its spring energy storage capacity, and a controlled actuator which is load matched to the valve load and the spring return actuator retensioning load. Within the spring return actuator, the output of nested torsion springs is transformed into various torque outputs, particularly constant torque outputs and increasing torque outputs. Spring output is transformed by eccentric spool and flexible element mechanisms or by four bar mechanisms through changes in leverage produced by varying torque arms. The output of a controlled actuator can be transformed into torque outputs which are decreasing, increasing, etc., using eccentric spool and flexible element mechanisms or using four bar mechanisms in order to produce a loadmatch to the valve load. A pneumatic controlled actuator, comprised of a piston, push rod, concentric spool and flexible elements which oppositely wrap on the concentric spool and connect to the piston and the push rod, produces a constant torque output and no side thrusting of the piston, is not subject to fouling of the flexible element, and can be used as either a single or double acting actuator. A high fatigue life spooling cable connection, which is comprised of a self adjusting multiple leg cable, is used in the spring return actuator and the pneumatic controlled actuator.

Growing community of inventors

Valley Stream, NY, United States of America

Douglas A Bourne