Fast food service access window with segmented push-bar

An access window for installation in business establishments to provide access between a customer and a sales person comprising:

• (a) at least one pivoting planar surface hinged at a minimum of two pivot points;
• (b) a rotor member operatively coupled to at least one of said pivot points;
• (c) a segmented operator bar hinged at its outboard ends and articulated between said outboards ends;
• and
• (d) an adjustable flexible linkage operatively coupling said rotor member to said operator bar such that movement of said operator bar causes said planar surface to swing about said pivot points.

An access window for providing access between a customer and a sales person comprising:

• (a) two pivoting vertically disposed planar surfaces, each said planar surface hinged at a first pivot point and a second pivot point;
• (b) a first hinged post and antifriction member attached at said first pivot point;
• (c) a second hinged post antifriction member and rotor attached at said second pivot point;
• (d) an adjustable flexible linkage interconnecting the rotors such that the flexible linkage causes said rotors to rotate in opposite direction when either rotor is rotated;
• (e) a segmented operator bar hinged at its ouboard ends and articulated between said outboard ends and operatively coupled to at least one of said rotors such that pushing the operator bar causes the coupled rotor to rotate.

An access window for installation in business establishments to provide access between a customer and a sales person comprising:

• (a) at least one pivoting planar surface hinged at a minimum of two pivot points;
• (b) an operator bar;
• (c) an elastic linkage coupling said operator bar to said planar surface;
• and
• (d) a locked window bias member wherein said bias member stores the initial force applied to said operator bar and subsequently uses said stored initial force to open said planar surface.

An access window for installation in business establishments for providing access between a customer and a sales person comprising:

• (a) at least one pivoting planar surface hinged at least one pivot point;
• (b) a rotor attached to said pivoting planar surface wherein said rotor delivers an initial opening torque greater than the torque at the end of the opening cycle and wherein said rotor delivers an initial closing torque less than the closing torque at the end of the closing cycle;
• and
• (c) an operator bar operatively coupled to said rotor and acting to turn said rotor and said planar surface when the operator bar is pushed.