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| Number | Title | Issue Date |
| 7316298 | Wheelchair safety brake assembly This invention relates to gravity reactive braking systems. According to the invention there is provided a brake system to control speed in a forward direction for descending inclined surfaces and a brake system for controlling rollback when ascending an inclined su... | 01/08/2008 |
| 6899212 | Device for holding a wheel against rotation on an inclined surface A one-way clutch includes a chamber containing a roller that moves in response to changes in the angular position of a component relative to an axis, such as in response to the slope of a surface on which a wheel is supported, to engage and disengage alternately a o... | 05/31/2005 |
| 5845746 | Wheelchair dynamic braking system An automatic braking system for wheelchairs which prevents rearward, downhill motion of wheelchairs while having no effect on horizontal or uphill motion. The braking system is made up of circular ratcheted plates which are attached to the axles of the dr... | 12/08/1998 |
| 5197405 | Auxiliary boat wheel apparatus A transportation and launching device for boats which can be handled by one person and which is carried with the boat during overland transportation, launching, and water operation of the boat. The device remains completely external to the boat during ope... | 03/30/1993 |
| 4629036 | Shopping cart braking wheel This invention relates generally to devices which are designed to prevent loss of shopping carts from shopping center parking lots or other areas where use thereof is expected. More specifically, it relates to a particular wheel design which locks when re... | 12/16/1986 |
| 4042251 | Safety device for lawn mowers A safety device for lawn mowers includes an elongated frame assembly having a pair of laterally spaced leg elements connected by a bight section. A plurality of ground anchoring elements depend from the bight section and are adapted to be selectively affi... | 08/16/1977 |
