Thawj Tricone Bits patent tau ruaj ntseg los ntawm American Howard R. Hughes nyob rau hauv 1909. Lub Tricone Bits thaum lub sij hawm tsuas muaj ib tug scraper me ntsis uas yuav ntaus lub heev mos av. Nws raug txwv rau kev siv Tricone Bits vim nws tsis tuaj yeem khawb hauv av nyuaj. Tsis zoo.
Xyoo 1925, Liangyalun me ntsis nrog meshing thiab interlocking hniav thawj zaug. Cov hniav no tuaj yeem "floss" tawm tsam ib leeg kom tshem tawm cov av thiab cov pob zeb hauv nruab nrab ntawm lawv, tiv thaiv koj los ntawm kev tshaj tawm. Txawm hais tias Tricone Bits no tuaj yeem xyaum ntu ntev dua yam tsis tas yuav hloov Tricone Bit thiab tuaj yeem cuam tshuam ib nrab ntawm ob qho tib si tawv thiab mos interlayers, qhov tsis sib xws ntawm lub neej luv luv tau pom meej.
Tricone Bits kuj tau ua nws qhov kev lag luam tawm hauv xyoo 1933, muab cov txiaj ntsig tseem ceeb thiab kev sib piv ntev ntev. Cov evolution uas ua raws li pom qhov pom ntawm ntau yam me me thiab qhov ntau thiab tsawg, nrog rau kev nce qib tseem ceeb hauv Tricone Bits cov ntaub ntawv thiab cov txheej txheem kho cua sov. Lub hnub nyoog ntawm cov ntaub ntawv kev loj hlob yog li pib.
