Did You Know...
...that on Dec. 15, 1836, the Patent Office was completely destroyed by fire? Lost were some 7,000 models, 9,000 drawings, and 230 books plus all records of patent applications and grants.
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 |
| 6560879 | Chain saw adjuster An arrangement that provides a semi-automatic tension adjustment of an endless cutting chain on a guide bar of a chain saw as the links of the chain wear with use. A specially designed cam biases a tensioner pin to continuously force the guide bar away fr... | 05/13/2003 |
| 6418902 | Composite full circle crankshaft counterweight A composite cranks haft counterweight of a two-cycle internal combustion engine includes a "T" shaped counterweight surrounded by a cup-shaped retainer that holds light weight inserts against the counterweight. Together with the counterweight the inserts ... | 07/16/2002 |
| 6079697 | Method and apparatus for fast start fuel system for an internal combustion engine A fuel delivery system for an internal combustion engine. The fuel delivery system includes a carburetor housing having an air passage with a throttle valve disposed therein. A choke lever is movably mounted to the carburetor housing for restricting air f... | 06/27/2000 |
| 5881464 | Line head for flexible line trimmer A "bump-feed" type line head (108) and replaceable spool (116) for a flexible line trimmer are specially adapted for removing and mounting the spool in a single manual movement to the line head to facilitate spool and line replacement. The line head inclu... | 03/16/1999 |
| 5881465 | Line head for flexible line trimmer A "bump-feed" type line head (108) and replaceable spool (116) for a flexible line trimmer are specially adapted for removing and mounting the spool in a single manual movement to the line head to facilitate spool and line replacement. A U-shaped retentio... | 03/16/1999 |
| 5815928 | Portable powered lawn and garden tool A trimmer (10) has a power source (12) and a tabular drive shaft housing (32) for coupling the power source (12) to a rotating working element. The drive shaft housing (32) is rotatable with respect to the power source (12) and a handle (26) which is fixe... | 10/06/1998 |
| 5794864 | Portable lawn and garden mulching vacuum The invention provides for a portable apparatus for shredding yard and garden waste. Particularly shaped blades are used for better shredding and mulching performance.... | 08/18/1998 |
| 5771582 | Apparatus for carrying spare line spool on flexible line trimmer A flexible line trimmer having a rotating cutting head using a spool of flexible trimming line to form a cutting element is provided with a spare spool of cutting line, stored in various locations on the flexible line trimmer, available to replace the spo... | 06/30/1998 |
| 5738064 | Vibration weld chassis assembly A portable power tool is provided which includes a chassis defining an integral rear handle, a first chamber for lubricating oil generally at a front end of the chassis, a second chamber for fuel generally at a rear end of the chassis, and a recess betwee... | 04/14/1998 |
| 5666734 | Guide bar coding system A guide bar coding system which permits a user to easily and correctly match a saw chain to a saw guide bar. The guide bar has a laminate or multi-layer structure, and includes a recessed surface that is colored or painted to define guide bar indicia whic... | 09/16/1997 |
| 5652995 | Nozzle for lawn and garden blower A nozzle for use with a lawn and garden blower provides a comparatively wide pattern of high velocity air. The nozzle includes a substantially hollow, tubular housing tapering from the upstream end to the downstream end. At the downstream end is a plurali... | 08/05/1997 |
| 5638574 | Convertible leaf blower and vacuum A convertible leaf blower and vacuum apparatus includes a fan and baffle supported on one end of a cylindrical member for insertion into a collar defining an air inlet of the fan for narrowing the diameter of the air inlet when the apparatus is being conn... | 06/17/1997 |
| 5634322 | Method for assembling and packaging a flexible line trimmer A flexible line trimmer for shipping and storing in a knocked down version for reduced package sizes includes a single length of tube that is received within an extended neck portion of a motor housing. During final assembly, the tube is extended and lock... | 06/03/1997 |
| 5603869 | Fuel mixture limitation device A limitation device which limits post-adjustment rotation of an adjustment screw (10) on single adjustment screw carburetors (20). In one embodiment, the limitation device uses a limiter cap (100, 200) removably attached to the adjustment screw (10) which... | 02/18/1997 |
| 5594990 | Lawn trimming and edging apparatus having motor housing rotatable on extendable handle A powered lawn and garden tool for trimming and edging lawns is specially adapted for shipping and storing in collapsed state for reduced package sizes includes a single length of tube that is received within an extended neck portion of a motor housing. D... | 01/21/1997 |
| 5542380 | Integrated dynamic air cleaner An improved centrifugal air cleaning system including a fan, a fan volute defined, in part, by a curved outer wall and a base wall, and a deflector wall projecting from the base wall intermediate the fan and the outer wall. An air inlet port is formed in ... | 08/06/1996 |
| 5521339 | Catalyst muffler system A muffler for coupling to an exhaust port of an internal combustion engine includes a housing, a first hollow body within the housing, a catalyzer within the first hollow body, and a second hollow body within the housing. The first hollow body has an inne... | 05/28/1996 |
| 5485814 | Resetting ignition switch for a gasoline powered chain saw A resetting ignition switch for a portable power tool whereby movement of a choke assembly from a first, normal position to a second, choking position simultaneously and automatically moves an ignition switch from a stop to a run position to permit starti... | 01/23/1996 |
| 5451728 | Muffler for two-cycle internal combustion engine and method of assembly A muffler for a two-cycle internal combustion engine used to power lawn and garden equipment includes two mating shells and two plates, sandwiching a spark arrestor screen, are disposed between the shells to form first and second expansion chambers betwee... | 09/19/1995 |
| 5446964 | Apparatus and method for packaging and assembling a flexible line trimmer A flexible line trimmer for shipping and storing in a knocked down version for reduced package sizes includes a single length of tube that is received within an extended neck portion of a motor housing. During final assembly, the tube is extended and lock... | 09/05/1995 |
| 5383427 | Two-cycle, air-cooled uniflow gasoline engine for powering a portable tool A flexible line trimmer is powered by a two-stroke internal combustion engine. The engine is scavenged in a uniflow fashion and has a scavenging cylinder and an exhaust cylinder connected by a common combustion chamber. Each cylinder has a piston turning ... | 01/24/1995 |
| 5345684 | Flexible line trimmer having an anti-vibration handle A flexible line trimmer with a vibration dampening support handle includes a rotary power source and a rotatable trimmer head, both of which are connected by a drive shaft enclosed in a rigid housing. A flexible line trimmer has a vibration dampening rear... | 09/13/1994 |
| 5343831 | Dynamic air cleaner and carburetor pressurization system for air cooled internal combustion engine A portable work producing apparatus, such as a chain saw, has an engine cooled by air from a blower driven by the engine. The engine's carburetor is pressurized with clean air from the blower. The blower includes a centrifugal impeller mounted within a fa... | 09/06/1994 |
| 5303476 | Line head for a rotary line trimmer A line head (10) for a rotary line trimmer uses a bail (16) to clasp a single length of cutting line (18). The head has a first and second side (12, 14). The first side (12) of the head (10) has a plurality of radial ridges extending radially from a centr... | 04/19/1994 |
