Inflatable pressure compensated helmet stabilization system
Patent 4035846 Issued on July 19, 1977. Estimated Expiration Date: 
July 19, 1994. 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.
July 19, 1994. 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 3310811 3600714 3761959 3806950 InventorApplicationNo. 05/715039 filed on 08/17/1976US Classes:2/413, By fluid-containing cushion2/6.1, Aviator`s helmet2/6.2, Having article attaching means2/909Head protector (e.g., helmet, goggles, etc.)ExaminersPrimary: Guest, Alfred R.Attorney, Agent or FirmAbstractAn inflatable stabilization system located within a rigid helmet shell. The ystem is constructed of an inflatable bladder having a manifold located in the nape area of the helmet with four curved ducts branching off to extend forwardly over the occipital and crown areas of the wearer. The bladder is attached to the helmet shell by hook and pile fastener strips. A pressure difference sensor controls bladder pressure to maintain a desired pressure difference between the bladder and ambient pressure. When a cloth hat or liner is used with the helmet, the bladder is located between the hat and the helmet shell. | |
