Thread lock
AssigneeThe Oakland Corporation
InventorRichard B. Wallace
Life of this patent
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Abstract
Thread locking structure in which the separate fluid parts of a two-part adhesive (such as an epoxy resin and an activator) are applied in circumferentially related relation to the threads of a threaded member such as a bolt. At least one pair of adjacent edges of the deposits are in contact and the parts are covered with a single protective sealing film such for example as polyvinyl alcohol. When the companion threaded member is engaged, the two parts of the adhesive are intermingled mechanically and the setting up of the adhesive is initiated.
Claims14
A thread lock construction comprising a body having threads formed thereon provided with two physically separated deposits of fluid components which when reacted together form a solid locking material in the thread grooves at a circumferentially extending zone on said body comprising a plurality of consecutive thread convolutions extending around said body, one of said deposits extending only partly around said body within said zone, the other deposit being located on substantially the same consecutive thread convolutions within said zone and extending around said body in position to bring one of the circumferentially separated edges of said other deposit initially into contact with the adjacent one of the circumferentially separated edges of the said one deposit, said deposits being fluid and capable of being spread and intermixed by engagement with a mating threaded body, a thin barrier of solid material formed by reaction between the two deposits at the initially contacting edges thereof constituting a barrier between said deposits which limits reaction therebetween, a rupturable thin film of dry non-tacky protective material overlying both deposits and barrier, the solid barrier between said zones forming mechanical mixing elements to improve the intermixing of the materials of said deposits when said body is threadedly engaged with a mating threaded body.
The method of making a thread lock construction which comprises depositing simultaneously in the thread grooves at opposite sides of a threaded portion of a body two physically separated deposits of fluid components which when reacted together form a solid locking material to occupy respectively a first zone extending only partly around the threaded portion but occupying a plurality of consecutive threads and a second zone located circumferentially of said first zone and occupying substantially the same consecutive threads, causing said deposits to flow circumferentially along the threads into contact with each other and to react to form a solid reaction product which forms barriers between the deposits on the first and second zones, and thereafter providing a liquid film-forming coating which when dry forms a non-tacky protective rupturable film covering both parts of said fluid deposits.
Dependencies are inferred from the claim text.