Bizarre Patents
An aircraft having vertical takeoff and landing capability provided with at least first and second laterally extending paddle wheels rotatable on a central axis perpendicular to the longitudinal axis of the aircraft fuselage and between its nose and tail.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7735584 | Percussion hammer for enlarging drilled holes The present invention relates to a percussion hammer for enlarging drilled holes. The hammer comprises an external outer wear sleeve (5), an inner cylinder (7) mounted co-axially within the outer wear sleeve (5), a tubular torque shaft (3... | 06/15/2010 |
| 7347291 | Bit assembly A bit assembly for a drilling apparatus working by impact and rotation or merely by rotation, and comprising a pilot bit (1) drilling the hole centre and in connection with the pilot bit a ring bit (2) is arranged to drill the outer circle of the hole ... | 03/25/2008 |
| 7017684 | Jet cutting device with deflector A jet cutting device having a cutter head provided with a nozzle for ejecting a stream of fluid against a body so as to create a selected cut in said body. The cutter head is provided with a deflector having a deflection surface arranged to deflect the stream of flu... | 03/28/2006 |
| 6808030 | Enlargement drilling system The invention concerns a drilling apparatus for enlarging a bore in the ground, comprising a drilling head (6) having a drilling bit (12); a percussion piston (14) which is driven by a drive medium (9) and which impacts against the drilli... | 10/26/2004 |
| 6494272 | Drilling system utilizing eccentric adjustable diameter blade stabilizer and winged reamer The drilling assembly includes an eccentric adjustable diameter blade stabilizer having a housing with a fixed stabilizer blade and a pair of adjustable stabilizer blades. The adjustable stabilizer blades are housed within openings in the stabilizer housi... | 12/17/2002 |
| 6202768 | Rock drilling tool and reamer for percussive drilling A rock drilling tool includes a pilot bit screw threaded into a front end of a drill rod. A reamer is mounted on the outside of the pilot bit. The reamer includes a central opening having a front portion and a rear portion. The front portion is connected ... | 03/20/2001 |
| 5553676 | Reversible expander Several designs of reversible expanders (10, 50, 100, 150) are disclosed for use on an underground boring tool (14) of the type using an air impact hammer. The reversible expanders allow a borehole of larger diameter than the tool to be formed. The revers... | 09/10/1996 |
| 5174390 | Modular cluster drill apparatus A cluster drill includes a first plate portion and a second plate portion. The first plate portion extends parallel to the second plate portion and is rigidly affixed to the second plate portion. At least one first and second plate aperture is formed in t... | 12/29/1992 |
| 4361197 | Blast hole grooving bit and wear resistant compact A blast hole drill bit is disclosed for forming longitudinally extending grooves in already drilled blast holes, having a body with a forward face and a rearwardly extending pilot diameter. One or more radially extending wings are located at the rearmost ... | 11/30/1982 |
| 4317595 | Chisel for a crust breaking facility Device and method for breaking open the solidified crust of electrolyte on an electrolytic cell, in particular a cell for producing aluminum. At least one projection is provided on the lower part of the shaft of a chisel used on a crust breaker. After bre... | 03/02/1982 |
| 4106578 | Percussion drill bit A rotary air percussion drill bit which has a cylindrical body portion with first and second ends. A flat bottom face comprises one end with a shaft attached to the remaining end. A plurality of hard inserts is mounted in the body portion and projects dow... | 08/15/1978 |
