초록 ▼

A piston and geared rack assembly are moved by pressurized air in opposite directions within a power cylinder housing as the vehicle operator registers door closing and opening commands in a solenoid valve. This lateral movement is converted to rotary movement by a pinion gear driven by the rack and

A piston and geared rack assembly are moved by pressurized air in opposite directions within a power cylinder housing as the vehicle operator registers door closing and opening commands in a solenoid valve. This lateral movement is converted to rotary movement by a pinion gear driven by the rack and coupled to turn a spindle shaft which drives the door. At full stroke during door closing, the power piston actuates a valve to charge the lower chamber of an auxiliary cylinder to move a lift piston rod, movable within the spindle shaft, to raise the closed door into a locked position. Upon a door-open command, the solenoid valve exhausts the charged cylinder chambers, admits air into the upper chamber of the auxiliary cylinder to move the lift piston and rod to lower and release the door, and slowly charges the associated opening chamber. This enables the delayed movement of the power piston and rack assembly in the opposite direction, reversing the rotation of the pinion and spindle shaft, to open the door. If air pressure is lost with the door closed and locked, the weight of the door forces the lift piston and rod down, releasing the door from its locked position for emergency manual operation.

대표청구항 ▼

Door operating apparatus, for controlling the opening and closing of a vehicle door, comprising: (a) a housing including a first cylinder chamber, (b) a piston and rack assembly within said first chamber and movable in both directions therein, (c) a pinion and associated shaft coupled for moving sai

Door operating apparatus, for controlling the opening and closing of a vehicle door, comprising: (a) a housing including a first cylinder chamber, (b) a piston and rack assembly within said first chamber and movable in both directions therein, (c) a pinion and associated shaft coupled for moving said door and controlled by said piston and rack assembly for rotating in opposite directions to close and open said door as said rack moves in one or the other direction, respectively, (d) means for supplying a source of pressurized fluid coupled to said first chamber for selectively moving said piston and rack assembly in said one and other directions, (e) an auxiliary housing with a cylinder chamber coupled to said housing, (f) a lift piston and rod assembly having the piston portion positioned within said auxiliary housing cylinder chamber to respond to pressurized fluid, (1) the rod portion colocated within said pinion shaft, movable longitudinally with respect thereto, and coupled to said door, (g) valve means coupling said auxiliary cylinder to said source and controlled by said piston and rack assembly for supplying pressurized fluid to said auxiliary cylinder chamber when said piston and rack assembly completes a full stroke when closing said door, and (h) said lift piston and rod responsive to the pressurized fluid supplied to said auxiliary cylinder chamber for raising said rod and said door into a lock position.