Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1990-10-10
1991-11-19
Crosland, Donnie L.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
3404501, 60534, 60535, 60545, B60Q 100
Patent
active
050669400
ABSTRACT:
A brake pedal travel warning system for use in an automotive vehicle includes a brake pedal and a master cylinder associated with the brake pedal through a connecting link. The master cylinder includes a fluid reservoir containing brake fluid and a housing including an internal bore communicating with the fluid reservoir through a reservoir port, the bore defining a primary chamber and a second chamber. A primary piston is slidably disposed in a primary chamber and reciprocally moves therein. A secondary piston is slidably disposed in the secondary chamber. The master cylinder further includes a signal generation means associated with the primary piston for generating a warning signal in response to excessive piston travel in the primary chamber. In one embodiment, the signal generation means comprises a magnetic member disposed on the end of the primary piston which excites a reed switch assembly disposed externally of the housing after the primary piston has exceeded the predetermined travel distance within its primary chamber.
REFERENCES:
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patent: 4077217 (1978-03-01), Leiber
patent: 4084377 (1978-04-01), Gaiser
patent: 4318091 (1982-03-01), Fulmer
patent: 4604866 (1986-08-01), Gaiser
patent: 5016442 (1991-05-01), Zander et al.
Coppiellie Raymond L.
Crosland Donnie L.
Ford Motor Company
Hofsass Jeffery A.
May Roger L.
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