Powerlift competition safety device
Patent 4799672 Issued on January 24, 1989. Estimated Expiration Date: 
January 4, 2008. 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.
January 4, 2008. 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 3451271 Exercise process and apparatus Variable resistance exercise apparatus Barbell support apparatus for weight lifting exercising Plyometric exercising device Patent #: 4750739 InventorApplicationNo. 07/140622 filed on 01/04/1988US Classes:482/104, Barbell support482/113Including external conduit structureExaminersPrimary: Millin, V.Assistant: Bahr, Robert Attorney, Agent or FirmInternational ClassesA63B 21/078 (20060101)A63B 21/06 (20060101) AbstractA weightlifting apparatus operable to support a barbell comprising a pair of spaced-apart, substantially parallel vertical support members, each having an upper end and a lower end. A base supports the support members. Each support member bears synchronously and selectively movable, horizontally projecting spotting arms which are disposed in substantially the same horizontal plane. These support members are adapted to receive the barbell. Each spotting arm is coupled with a rod and cylinder assembly and each assembly is fluid actuable for synchronous movement of said spotting arms. An actuator or switch is provided for actuating said assemblies. | |
