Bizarre Patents
A self defense weapon formed as a memo pad and which is easily held by a person's fingers, therefore making it possible to provide protection from a mugger and also to quickly and easily write a record or a message without failure of missing or forgetting significant information under a stressful situation.
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| Number | Title | Issue Date |
| 7156190 | Impact tool An impact tool has a slidable hammer that is driven by hydraulic oil under pressure inside a chamber. The hydraulic oil is pressurized by a piston driven by compressed gas on the opposite side of the piston from the hydraulic oil. The gas in the gas chamber is compr... | 01/02/2007 |
| 7137458 | Impact mechanism for a hammer drill An impact mechanism for a hammer drill, which has a housing and a drill bit protruding outside the housing, is provided. The mechanism includes firstly an impact platform within the housing; the impact platform is in connection with the drill bit for receiving impac... | 11/21/2006 |
| 6460628 | Rapper assembly The conventional rapper design is improved to provide longer service without maintenance and easier access at less cost when service is required by, among other things, redesign of the hammer assembly, hammer shaft and lever assemblies, and the hammer ass... | 10/08/2002 |
| 6431655 | Breaker device for removing the tops of columns The breaker device for removing the tops of columns comprises a support structure composed of a plurality identical chain elements reciprocally linked by link couplings to form a closed chain which can surround a column which is to be topped. Each chain e... | 08/13/2002 |
| 5695254 | Method and apparatus for breaking concrete or the like A substrate breaking apparatus and method including a frame and a plurality of independently controlled hammers movable between a lowered position and a raised position.... | 12/09/1997 |
| 4867251 | Impact device An impact device having a housing with hollow cylindrical aperture therein. The cylindrical aperture has a rotatable member within. The rotatable member has axial multiple rods thereon. On each rod of the rotatable member there are captive annular masses ... | 09/19/1989 |
| 4723610 | Percussion device The percussion mechanism of this device, comprising a cylinder, a free piston, an anvil, a tool holder in which a bundle of needles is disposed, the heads of which are applied to the anvil, is mounted to slide in a tubular housing between two springs used... | 02/09/1988 |
| 4594759 | Surface-chiseling machine A surface-chiseling machine for refractory, concrete or other materials is disclosed, which includes a piston having at its one end a step portion and on a side periphery at its other end a through-hole, and a cylinder forming a first air chamber on a clo... | 06/17/1986 |
| 4507014 | Consolidating plank for a highway finishing machine The invention concerns a consolidating plank for a highway finishing machine the basic plank body of which is lengthenable by a manually attachable plank or by an extendible plank. For creating such a high compacting effect that a subsequent following com... | 03/26/1985 |
| 4458415 | Hammer driven chopper A chopping hand tool, including a slidable hammer along a handle of the tool for striking against a hammer stop mounted on the handle, so to transmit the hammer striking force to a toothed edge of a blade affixed to one end of the handle, so that the toot... | 07/10/1984 |
| 4356008 | Knocking arrangement for electric precipitation A knocking arrangement for cleaning electrodes of an electric precipitator has a plurality of hammer members mounted on a rotary shaft, a plurality of anvil members arranged so that the hammer members strike against the anvil members, and connecting eleme... | 10/26/1982 |
| 4339961 | Pressure-responsive apparatus for assembling track links or the like Conventional apparatus for assembling a track chain tend to impose undesireable bending moments and residual loads thereon. The apparatus (22) of this invention overcomes these problems by providing a pair of movable pressure heads (26,28) registering wit... | 07/20/1982 |
| 4258956 | Method and apparatus for driving a single transversely elongated tool with a plurality of force transmitting beams An elongated tool is mounted for reciprocal motion on a support frame. A plurality of resonant force transmitting beams each having an input, an output, and at least one resonant node, are supported by the frame so their outputs are spaced apart adjacent ... | 03/31/1981 |
| 4247149 | Mechanically actuated impact mechanism An impact mechanism for rock breaking, pile driving and pile extracting, and the like, includes a head assembly (18) with a pair of shank members (24,26) movably mounted thereto and flywheel (76,78) and eccentric crankshaft parts (74) rotated by a motor (... | 01/27/1981 |
| 4153121 | Fluid operated undercutter The invention herein relates to an undercutting device which is provided with a substantially tubular body adapted to be placed within a parallel-sided hole. A rotary percussion head is provided at one end of the body and has one or more cutting tools whi... | 05/08/1979 |
| 4143719 | Multi-vibro pile hammer A multi-vibro pile hammer comprising a plurality of vibro pile hammers having vibration generating units adapted to generate vibrations with different phases and in synchronism with one another, and the arrangement is made such that vibrations to be trans... | 03/13/1979 |
