Catapult construction
Patent 4411248 Issued on October 25, 1983. Estimated Expiration Date: 
November 27, 2001. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
November 27, 2001. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1577250 2644271 Spring type projecting device Patent #: 4050438 InventorApplicationNo. 06/325224 filed on 11/27/1981US Classes:124/20.1, Having handle (e.g., crotch type slingshot)124/80, ELEMENT124/900, LIMB TIP ROTATABLE ELEMENT STRUCTURE473/569PROJECTILE, PER SE; PART THEREOF OR ACCESSORY THEREFORExaminersPrimary: Pinkham, Richard C.Assistant: Browne, William R. International ClassesF41B 3/00 (20060101)F41B 3/02 (20060101) AbstractA construction for compact catapults is described. An elastic cord is mounted and placed in tension by threading it through a number of grooved reels. The reels are rotatably fastened to capstans and thereby to a handle-equipped base. When a U-shaped pellet is hooked over a portion of the elastic cord, drawn back and then released, high acceleration forces are transferred to the pellet which then issues from the catapult. | |
