초록 ▼

Pressure cookers are disclosed comprising a pan having a pan ramp, a lid having a handle and a lid ramp cooperative with the pan ramp to provide a bayonet closure, such that the pan and lid ramps can be cooperatively engaged in the closed position, an abutment for preventing further rotation of the

Pressure cookers are disclosed comprising a pan having a pan ramp, a lid having a handle and a lid ramp cooperative with the pan ramp to provide a bayonet closure, such that the pan and lid ramps can be cooperatively engaged in the closed position, an abutment for preventing further rotation of the lid, a lock mechanism for locking the lid relative to the pan, a controller to control the lock mechanism to move it an unlocking and locking positions in which the lid cannot be removed from the pan, a pressure indicator mounted with respect to the lid movable between positions in which the pressure within the pressure cooker cannot leak therethrough and is permitted to leak therethrough, and a unitary assembly mounted on the lid independent of the handle in which the pressure indicator, the controller and the lock mechanism are mounted on the unitary assembly.

대표청구항 ▼

Pressure cookers are disclosed comprising a pan having a pan ramp, a lid having a handle and a lid ramp cooperative with the pan ramp to provide a bayonet closure, such that the pan and lid ramps can be cooperatively engaged in the closed position, an abutment for preventing further rotation of the

Pressure cookers are disclosed comprising a pan having a pan ramp, a lid having a handle and a lid ramp cooperative with the pan ramp to provide a bayonet closure, such that the pan and lid ramps can be cooperatively engaged in the closed position, an abutment for preventing further rotation of the lid, a lock mechanism for locking the lid relative to the pan, a controller to control the lock mechanism to move it an unlocking and locking positions in which the lid cannot be removed from the pan, a pressure indicator mounted with respect to the lid movable between positions in which the pressure within the pressure cooker cannot leak therethrough and is permitted to leak therethrough, and a unitary assembly mounted on the lid independent of the handle in which the pressure indicator, the controller and the lock mechanism are mounted on the unitary assembly. ethod of controlling a pneumatic actuator operably connected to a piston in a chamber and to a brake wherein a sensor system generates measurement values representative of a movement of the piston, the method comprising: supplying a pressurized gas to a forward side of the piston to accelerate the piston along a stroke; and beginning at a deceleration point along the stroke that is determined at least in part in response to the measurement values generated by the sensor system, supplying the pressurized gas to a reverse side of the piston while continuing to supply the pressurized gas to the forward side of the piston; and selectively activating the brake in response to the measurement values generated by the sensor system to stop the pneumatic actuator within a predetermined tolerance of a desired stopping position, wherein after at a predetermined condition after the deceleration point is determined at least in part in response to the measurement values generated by the sensor system the pressurized gas is discontinued to the reverse side of the piston but is continued to be supplied to the forward side of the piston; and wherein the predetermined condition is the first of a defined percentage of a distance from the deceleration point to the desired stopping position and a defined percentage reduction in a velocity of the piston. 7. The method of claim 6, wherein the brake is activated to control a velocity of the piston during acceleration of the piston. 8. A precision servo control system for a pneumatic actuator comprising: a pneumatic actuator having a positionable component with a stroke length; a supply of pressurized gas operably connected to provide a forward thrust and a reverse thrust to said positionable component; a brake operably connected to said actuator; a sensor system that determines a measurement of said positionable component along said stroke length; and a servo control system electrically connected to said supply, said brake, said sensor system and said pneumatic actuator, wherein said control system operates to initiate the forward thrust to move the positionable component along said stroke length and once a deceleration point along said stroke length is reached initiates the reverse thrust while maintaining the forward thrust and simultaneously selectively applies the brake to stop the positionable component within a predetermined tolerance of a desired stopping position. 9. The system of claim 8, wherein the brake controls a velocity of the positionable component during the forward thrust. 10. A precision servo control system for a pneumatic actuator comprising: a pneumatic actuator having a positionable component with a stroke length; a supply of pressurized gas operably connected to provide a forward thrust and a reverse thrust to said positionable component; a brake operably connected to said actuator; a sensor system that determines a measurement of said positionable component along said stroke length; and a servo control system electrically connected to said supply, said brake, said sensor system and said pneumatic actuator, wherein said control system operates to initiate the forward thrust to move the positionable component along said stroke length and once a deceleration point along said stroke length is reached initiates the reverse thrust while maintaining the forward thrust and simultaneously selectively applies the brake to stop the positionable component within a predetermined tolerance of a desired stopping position, wherein the brake is a proportional brake. 11. The system of claim 10, wherein the supply of pressurized gas is operably connected to said pneumatic actuator via at least one directional valve. 12. The system of claim 10 wherein the control system is separate from the pneumatic actuator in a housing having a keypad and a display to enter and display commands and having a communication port that allows commands to be provided from a remote computer