Patent ID: 6257352
Filing Date: 2001-07-10
Classification: B28D

Abstract:
A device for breaking rocks comprising:a) a hollow tube having a weight slidably disposed therein;b) a weight raising device for raising and releasing said weight to allow said weight to fall within said tube under the influence of gravity;c) an attachment structure connected to said hollow tube for securing said device for breaking rocks to one of a stationary object and a vehicle;d) a recoil tube telescopically received over a lower end of said hollow tube said recoil tube being resiliently secured to said hollow tube, a lower end of said recoil tube extending below said lower end of said hollow tube;e) a nose block secured to said lower end of said recoil tube, said nose block having a bore formed therethrough constructed and arranged to slidably receive a tool therein, said tool being retained in said bore in said nose block by a pin passed through said nose block, said tool having a flat machined into a side thereof to permit said pin to intersect and pass through said bore, thereby retaining said tool in said bore; and,f) an elastomeric recoil buffer disposed within said recoil tube in a space defined between said lower end of said hollow tube and an upper surface of said nose block, said recoil buffer having a bore formed therethrough in alignment with said nose block bore to allow an upper end of said tool to extend above said recoil buffer so that said weight may impact said tool directly, said recoil buffer being constructed and arranged to resiliently absorb impact forces imparted thereto by said weight.