44results about How to "Limited maintenance" patented technology

A radiation therapy system optimized for treating extremities such as the breast has unique geometrical features that enable the system to deliver an accurately located prescribed dose to a target volume while eliminating or reducing the collateral dose delivered to the rest of the patient. The patient lies in a prone position on a rotating, shielded table, with the anatomy to be treated protruding through an orifice in the table into the path of a radiation beam. An optional integral imaging system provides accurate target volume localization for each treatment session. Utilizing the effects of gravity on a prone patient maximizes the separation of a target volume within the breast to adjacent critical structures such as the chest wall, heart and lungs, thereby reducing long term complications not associated with the primary disease. A shielded interface surface between the radiation source and the patient reduces patient dose due to scattered or stray radiation. A shielded enclosure for the radiation sources combined with the shielded interface surface eliminates the need for primary shielding in the room and allows the therapy system to be used in a transportable, mobile facility.

A non-motorized waterfowl decoy device includes a recoil mechanism adapted for use in a front-facing position or a rear-facing position. The recoil mechanism includes a rotatable spindle having a long axis about four times greater than its diameter. The recoil mechanism further includes a elastic drive member adapted to slidably couple into a pair of corresponding slots on the spindle and engage a rear-support post having a u-shaped alignment channel. A pull cord attached to the spindle causes the spindle to rotate and coil the elastic drive member. Positioning the pull cord through a provided aperture on the rear guide-post enables reward-facing operation and, positioning the pull cord through a provided aperture on a front guide posts enables forward-facing operation.

In a motorcycle-use power unit in which a clutch device arranged in a power transmission path between a crankshaft and a drive wheel is housed in a clutch chamber which is defined between a crankcase and a clutch cover joined to a side surface of the crankcase, the maintenance of the clutch control device can be easily performed while preventing a lowering of oil-pressure transmission efficiency between the clutch device and the clutch control device and preventing an increase in the weight of the motorcycle. A clutch control device performs a changeover of engagement and disengagement of a clutch device by controlling the oil pressure applied to the clutch device. Oil passages for connecting the clutch control device and the clutch device with each other are mounted on a clutch cover.

An engine includes an exhaust gas control apparatus that is configured to store NOx and react NOx with a reduction agent. A control device for the engine includes an electronic control unit. The electronic control unit is configured to: (i) execute a rich spike control, the rich spike control is a control executed to temporarily change an in-cylinder air-fuel ratio from a leaner air-fuel ratio than the stoichiometric air-fuel ratio to the stoichiometric air-fuel ratio or a richer air-fuel ratio than the stoichiometric air-fuel ratio, and (ii) vary an overlap amount of an intake valve and an exhaust valve such that the overlap amount is less during execution of the rich spike control than during non-execution of the rich spike control, in an operation range where a pressure of the intake port becomes higher than a pressure of the exhaust port.