Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 6848245 | Lawn mower with improved blade and blade housing A grass cutting blade is provided which can be rotated in either direction while providing cutting and airlift in either direction. This can be used in cooperation with a cutting deck housing which includes a particular discharge opening and channel configuration wh... | 02/01/2005 |
| 6708472 | Lawn mower having disabling feature A disabling feature used with a lawn mower, for disabling the drive wheels of a lawn mower when an obstacle is encountered. Braking, engine kill, blade stopping, and declutching is contemplated upon the tripping of a pivotable contact device which in one embodiment ... | 03/23/2004 |
| 6684535 | Snowthrower discharge assembly clearance method and apparatus for facilitating same A shield configuration for a snowthrowing discharge chute, which may be pivoted out of the way for clean-out purposes while reducing the opportunity for the user to extend a body part or other object into the chute while the engine is running. The apparat... | 02/03/2004 |
| 6629586 | Method and apparatus for braking vehicle A brake assembly is provided for use with a utility vehicle. The brake assembly includes a mechanism including a pair of compression springs configured to provide the ability of one brake to be further applied after one brake has been completely applied. ... | 10/07/2003 |
| 6591594 | Method and apparatus for restricting grass cutting of a lawn mower in reverse A lock out feature for preventing a lawn mower from going into reverse unless the lawn mower blade is first disengaged, while allowing the lawn mower cutting blade to be reengaged upon being placed in reverse, the latch nevertheless allowing the lawn mowe... | 07/15/2003 |
| 6513310 | Lawn mower having disabling feature A disabling feature used with a lawn mower, for disabling the drive wheels of a lawn mower when an obstacle is encountered. Braking, engine kill, blade stopping, and declutching is contemplated upon the tripping of a pivotable contact device which in one ... | 02/04/2003 |
| 5983614 | Lockable front wheel swivel for lawn mowers This invention relates in general to lawn mowers, and particularly relates to a front wheel swivel assembly which can be selectively locked into a straight-ahead orientation during operation of the mower and by use of controls within the operator's reach ... | 11/16/1999 |
| 5960617 | Lawn mower cutting blade spindle assembly including quick change characteristics The present invention provides a lawn mower blade spindle assembly which can be easily serviced in the field, which includes a blade height adjustment feature which allows a blade to be replaced or be adjusted without removing the blade spindle bearings. ... | 10/05/1999 |
| 5791131 | Convertible mower blade One or more replaceable cutting blade tips and a central mounting bar comprise a blade assembly. Each of the replaceable cutting blade tips can be selectively attached to the central mounting bar without the use of tools. During typical operation, the rep... | 08/11/1998 |
| 5782073 | Lawn mower cutting blade spindle assembly including quick change characteristics The present invention provides a lawn mower blade spindle assembly which can be easily serviced in the field, which includes a blade height adjustment feature which allows a blade to be replaced or be adjusted without removing the blade spindle bearings. ... | 07/21/1998 |
| 5601512 | Reverse speed control for lawn mowers A self-propelled lawn mower and control system for same which prevents the lawn mower from operating at high engine speed while in reverse, while still allowing a wide range of throttle speeds while in forward drive mode. Normally-open switches are closed... | 02/11/1997 |
| 5526635 | Lawn mower including improved blade clutch and brake features A lawn mower including a cutting blade brake and clutch which discourages blade engagement after a predetermined level of blade brake wear, damage, or improper adjustment is encountered. Also provided is an improved idler pulley system providing an improv... | 06/18/1996 |
