Abstract: A retractor device for simultaneously retracting and viewing bodily tissues during a medical procedure. The retractor includes a blade member for retracting bodily tissues and an imaging device to form an image of the bodily tissues which are exposed by the operation of the blade member. The imaging device is coupled to a display device so that the image of the bodily tissues formed by the imaging device is displayed by the display device. Moreover, a method is provided for endoscopically performing a tissue retracting procedure using a retractor device. The method includes the steps of retracting bodily tissues using a retractor to form a cavity and imaging the cavity using an imaging device mounted on said retractor to form an image of the cavity and to provide the image of the cavity to a display device that is coupled to the imaging device.

Abstract: A reactor device for simultaneously retracting and viewing bodily tissues during a medical procedure. The retractor includes a blade member for retracting bodily tissues and an imaging device to form an image of the bodily tissues which are exposed by the operation of the blade member. The imaging device is coupled to a display device so that the image of the bodily tissues formed by the imaging device is displayed by the display device. Moreover, a method is provided for endoscopically performing a tissue retracting procedure using a retractor device. The method includes the steps of retracting bodily tissues using a retractor to form a cavity and imaging the cavity using an imaging device mounted on said retractor to form an image of the cavity and to provide the image of the cavity to a display device that is coupled to the imaging device.

Abstract: A fluid injector, for example for injecting liquid fuel into a combustion chamber, comprises a valve housing and an injector assembly which may be removably mounted on the valve housing. The injector assembly includes discharging means for discharging fluid from the injector assembly, ducting for conveying the fluid between the valve housing and the discharging means and a control valve movable to a first position in response to flow of the fluid in a first direction through the ducting to close the discharging means and return the fluid from the discharging means to the valve housing and movable to a second position in response to flow of the fluid in a second direction through the ducting to open the discharging means to allow at least some of the fluid conveyed to the discharging means to be discharged therefrom and to return any surplus fluid to the valve housing. Provided in the valve housing are inlet and outlet passages for conveying the fluid into and from the valve housing, and a change-over valve.

Abstract: A fluid injector, for example for injecting liquid fuel into a combustion chamber, comprises a valve housing and an injector assembly removably mounted on the valve housing. The injector assembly includes discharging means for discharging fluid from the injector assembly, ducting for conveying the fluid between the valve housing and the discharging means and a control valve movable to a first position in response to flow of the fluid in a first direction through the ducting to close the discharging means and return the fluid from the discharging means to the valve housing and movable to a second position in response to flow of the fluid in a second direction through the ducting to open the discharging means to allow at least some of the fluid conveyed to the discharging means to be discharged therefrom and to return any surplus fluid to the valve housing. Provided in the valve housing are inlet and outlet passages for conveying the fluid into and from the valve housing, and a change-over valve.