Reelable ear plugs for construction helmets
Patent 5581821 Issued on December 10, 1996. Estimated Expiration Date: 
June 26, 2015. 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.
June 26, 2015. 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 D277317 3021090 3461463 3841326 Hard hat ear protector Self-storing cord and hose reel assemblies Seat belt retractor with comfort mechanism Retractable reel assembly for telephone extension cord Hearing protection system assembly Retractable reel assembly for telephone extension cord InventorApplicationNo. 494346 filed on 06/26/1995US Classes:2/422, With article-attaching means2/209.13, Combined with diverse article2/423, And ears128/866, External ear or head mounting means181/135, Ear insert242/385.1, Material movement responsive (e.g., window shade type)242/385.3Movable locking pawl on frameExaminersPrimary: Neas, Michael A.Attorney, Agent or FirmInternational ClassA42B 003/16AbstractA construction helmet is disclosed having a housing detachably mounted thereon which supports a ratcheted take-up reel having a pair of ear plugs attached to a hub by flexible cords wound about the hub. The reel is rotatably carried on the housing and a manually operable plunger releases the reel for automatic withdrawal of the ear plugs into a storage receptacle on the housing. Strain relief elements are attached to each cord and the receptacle includes shoulder straps engageable with the strain relief elements. The plunger is releasably connected to ratchet teeth carried on the reel hub. | |
