Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 7350515 | Ball feeder for ball serving machine A ball feeder for ball serving machine includes a seat consisting of a hollow transfer frame and a shaft bear, a rotating unit mounted to one side of the seat and having a ball scoop extended from an end thereof, and a plurality of guide sections sequentially rotata... | 04/01/2008 |
| 7334541 | Animal behavior shaping device A device for shaping the behavior of an animal using a behavior marking and reward delivery system is provided. The compact behavior shaping device includes a battery, a trigger assembly, a receiver, a spring assembly, and a bore assembly, and is capable of storing ... | 02/26/2008 |
| 7237545 | Compressed gas-powered projectile accelerator A compressed gas-powered projectile accelerator is disclosed having an improved means of gas distribution, a valve locking mechanism, an improved combined bumper/seal, and self-contained modular components to improve efficiency, manufacturability, and reduce size an... | 07/03/2007 |
| 7237544 | Pneumatic paintball gun and components An electro-pneumatic paintball gun preferably comprises a bolt assembly and a firing valve assembly that can be readily removed from the paintball gun. A bolt assembly preferably comprises a bolt sleeve. The bolt assembly is preferably removed by turning the bolt sl... | 07/03/2007 |
| 7185646 | Pneumatic assembly for a paintball gun A pneumatic assembly for a paintball gun preferably includes a bolt slidable between an open and a closed position. The bolt preferably operates as a firing valve by permitting compressed gas to flow through the bolt when the bolt is in the closed position but preve... | 03/06/2007 |
| 7146973 | Launching device A launching device of the present invention includes a launch unit having a first coupling element and a second coupling element. A barrel may be releasably connected to one of the first and second coupling elements and a cylinder may be releasably connected to the ... | 12/12/2006 |
| 7121272 | Paintball gun having an in-line pneumatic assembly A paintball gun preferably includes a compressed gas storage chamber, a bolt, and a firing valve all arranged in a longitudinal chamber of the paintball gun. The bolt preferably includes a first and a second surface area. One of the two bolt surface areas is prefera... | 10/17/2006 |
| 7114465 | Pet operated ball thrower A pet operated ball thrower including a base, a fulcrum post attached at its lower end to the base, a throw arm pivotally attached to the upper end of the fulcrum post, a ball receiving receptacle attached to the throw arm adjacent its outer end, a treadle pivotally... | 10/03/2006 |
| 7100593 | Pneumatically operated projectile launching device A pneumatically operated projectile launching device preferably comprises an electro-pneumatic flow distribution mechanism that receives and directs compressed gas to a pneumatic mechanism to open a bolt. ... | 09/05/2006 |
| 7069922 | Paintball marker internal reset system An internal reset system for paint ball markers. A hammer body as modified rearwardly to include an axial opening to receivably retain the forward head of a reset rod. The forward portion of the reset rod is thus free to reciprocate within the axial opening, but res... | 07/04/2006 |
| 7044119 | Pneumatic assembly for a paintball gun A pneumatic assembly for a paintball gun preferably includes a bolt slidable between an open and a closed position. The bolt preferably provides a firing mechanism for the paintball gun by permitting compressed gas to flow through the bolt to fire the paintball gun ... | 05/16/2006 |
| 7036496 | Anti-clogging paintball firing mechanism A mechanism for preventing the chopping by the firing bolt of a paintball stuck or only partially inserted into the gun barrel. The bolt comprises an axial channel admitting compressed gas through a radial intake port in the proximal section of the bolt and leading ... | 05/02/2006 |
| 6901923 | Pneumatic assembly for a paintball gun A pneumatic assembly preferably includes a compressed gas storage area, a firing valve, and a bolt arranged along substantially the same horizontal axis. A valve retainer, a compressed gas storage area housing, and a bolt assembly are preferably arranged to form a s... | 06/07/2005 |
| 6875136 | System for, and method of popping upwardly an element on a T-ball mechanism A transmitter in a member (e.g. bat) transmits signals when a switch on the bat is pressed. A pop-up apparatus receives the signals. A member in the apparatus prevents an element (e.g. ball) from being popped upwardly in a first positioning of the member and provide... | 04/05/2005 |
| 6776732 | Simulated tennis ball trajectory & delivery system A tennis training simulation system is disclosed that improves both reaction time and ground stroke techniques within a limited physical training environment. This training system combines simulated service of a tennis ball from a service line over a virtual net, an... | 08/17/2004 |
| 6481429 | Simulated gun A simulated gun for use with a disk-shaped or substantially disk-shaped flying member made of a metal as a bullet for discharging it forward, the simulated gun comprising: a gunbarrel having the hollow whose cross section along a direction normal to a fly... | 11/19/2002 |
| 5727538 | Electronically actuated marking pellet projector This invention is an airgun that is loaded and fired electronically. It is comprised of an "electronic decision maker" 12 capable of accepting input and supplying output, sensors (8, 22, 24, 26) to report to the decision maker 12 the condition of various ... | 03/17/1998 |
| 5303496 | Scent distributing method for hunters A method for applying a scent to a hunting or other desired location without approaching the area or contaminating it with human scent. The desired scent is placed in a carrying projectile means such as a pellet for a projectile delivery means such as a c... | 04/19/1994 |
| 5294109 | Ball tossing device for baseball batting practice A device for training a hitter to hit a baseball includes a striker rod having a striker head, a solenoid having a plunger, a ramp, a support structure and a control unit. The plunger is coupled to the striker rod. The support structure is coupled to the ... | 03/15/1994 |
| 4995374 | Throw and fetch doggie toy A ball-launching system for a dog's ball which automatically launches or shoots a ball along an airborne path, thereby enabling the dog to chase the ball, fetch it and return it to the system. The system includes a ball collection area for receiving the r... | 02/26/1991 |
| 4699378 | Tennis ball throwing machine A tennis ball throwing machine which comprises a motor secured to a frame board, the output end of the motor shaft having a gear wheel securely mounted thereon, first and second transmission shaft respectively fixed to a gear wheel at one end thereof and ... | 10/13/1987 |
| 4664094 | Apparatus for throwing objects In a training device for sports equipment, especially for serving tennis balls, the balls are supplied from a storage container through a laterally pivotable charging opening to a ball supply device. The ball supply device includes an endless belt circula... | 05/12/1987 |
| 4579340 | Basketball return device A basketball return device comprises a portable unit for positioning on a basketball court in a location generally underneath a basket into which shooting practice is to be conducted. The device includes a base with a ball-return mechanism therein and a v... | 04/01/1986 |
| 4539774 | Rodent exterminator A rodent exterminator triggered by the presence of a rodent in close proximity thereto having a spear attached thereto which impales the rodent, killing it instantly. A remote trigger actuates a solenoid to release a spring biased plunger, which is propel... | 09/10/1985 |
| 4365612 | Device for propelling an inflated ball by means of an elastic impact Device for propelling an inflated ball by elastic impact, includes an electromagnet 1, a plunger core 3 drawn by the coil, an oscillating lever 7, and a mechanical linkage 5, which connects the plunger core 3 to oscillating lever 7. The oscillating lever ... | 12/28/1982 |
| 4319168 | Multistage electromagnetic accelerator A multistage electromagnetic accelerator in which energy is serially induced in stages of parallel rail having serially segmented segments or stages utilizing a high DC current source, circuit breakers, and induction coils with both primary and secondary ... | 03/09/1982 |
| 4122822 | Spring type apparatus for the projecting of footballs and the like Apparatus for projecting footballs. Footballs are placed in a football container transferred one at a time to a football shooting station. A striking force is applied to the football. The striking force is adjustable; and its point of impact against the f... | 10/31/1978 |
| 4021036 | Tennis teaching machine with ball projector A tennis teaching machine has a ball hopper slidably mounted on a vertical support. A hollow extension arm protrudes from the ball hopper and has a ball projection mechanism at the end. A rotating ball tray supported within the ball hopper supplies balls ... | 05/03/1977 |
