Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 7040185 | Device for driving an output mechanism A device for driving an output mechanism has a rotationally drivable input shaft, a structure located between the input shaft and the outlet mechanism for transmitting a drive torque to the input shaft to the output mechanism, wherein a non-positive functional conne... | 05/09/2006 |
| 7032785 | Caulking gun having angle adjustment function A caulking gun includes a gun body, a push rod, a push plate, an adjusting knob, and a piston lever. Thus, the adjusting knob is rotated to move away from the push plate to increase the incline angle of the push plate, so that the push plate is locked on the push ro... | 04/25/2006 |
| 7032786 | Caulking gun having angle adjustment function A caulking gun includes a gun body, a push rod, a push plate, an adjusting seat, a driving member, and an elastic member. Thus, the adjusting seat is movable in the gun body by rotation of the driving member to adjust the incline angle of the push plate by guidance ... | 04/25/2006 |
| 6176398 | Effective trigger grip power device for caulk dispensing devices An effective trigger grip power device is disclosed for countering piston rod lock due to wear and tear in conventional manual caulking guns. The device is shown in the context of an open frame (which may be a single piece of molded plastic) having a down... | 01/23/2001 |
| 5893488 | Bone cement injector gun A paste injector gun, especially adapted for injecting bone cement, has first and second mechanical advantages. In a first embodiment, the first and second mechanical advantages are produced by two fulcrums engageable during different portions of the trig... | 04/13/1999 |
| 5887765 | Caulk gun A caulk gun is provided with a forward-biasing mechanism to maintain contact between the caulk tube and the piston rod. The forward biasing mechanism is of simple construction and is piggy-backed to the trigger housing of the caulk gun. The operation of t... | 03/30/1999 |
| 5638997 | Bone cement injector gun A paste injector gun, especially adapted for injecting bone cement, has first and second mechanical advantages corresponding to different portions of the trigger stroke. The first mechanical advantage is greater than the second such that the first facilit... | 06/17/1997 |
| 5433352 | Liquid dispenser A liquid dispensing device which includes a housing and a spring actuated lever arm hingedly connected to the housing and having a latch operatively connected to a toothed bar wherein upon depression of the lever arm the toothed bar is axially displaced t... | 07/18/1995 |
| 4779770 | Metering dispenser A metering device for dispensing a flowable substance from a container 10, in which a piston 11 with a piston rod 12 having a toothed portion 16 is disposed, includes a socket 17 adapted to be fixed to the container 10, an actuation lever 18 pivotal relat... | 10/25/1988 |
| 4744494 | Ram gun A ram gun for dispensing viscous fluid products such as adhesive, caulking materials and the like is disclosed. The gun can be rechargeable or can be employed as a single charge, disposable device. In a particular embodiment, the gun is formed in two part... | 05/17/1988 |
| 4679453 | Apparatus for producing stepwise movement An apparatus for providing stepwise movement along an elongated stepped member. A holder contains at least one button that includes a pivotally mounted claw disposed to engage the stepped member when the button is depressed. The claw pivots upon engagemen... | 07/14/1987 |
| 4633723 | Chainless feed system of mining cutterloader A chainless feed system of a mining cutter-loader comprises a guiding rack mounted on a conveyer and meshing with gears rotatably mounted on the cutter-loader. The gears are operatively connected through a rotating mechanism with the hydraulic cylinders o... | 01/06/1987 |
| 4621748 | Thermoplastic block shape, feeding mechanism and manufacturing method A block of solid thermoplastic material comprising alternating sections of circular and rectangular cross section, a device for melting and dispensing thermoplastic material having a thumb operated drive assembly for driving the block into the device, and... | 11/11/1986 |
| 4471888 | Device for dispensing measured amounts of multi-component materials A manually operable device is provided for dispensing measured amounts of a mastic-like or paste-like multi-component material. The components are supplied in separate containers and each container has an axially displaceable ejection piston. The pistons ... | 09/18/1984 |
