Brake master cylinder and brakelamp switch assembly

摘要

A brake master cylinder assembly includes a brake master cylinder housing having a rear end surface separated from a front end surface by a side surface, and defines an inner cavity that opens through the front end surface. At least one plunger is positioned in the inner cavity and is moveable between a retracted position and an advanced position. A shaft with one end extending into the inner cavity is in contact with the at least one plunger and has an other end extending out of the inner cavity away from the front end surface. A collapsible cover surrounds a portion of the shaft and has a forward end attached to the shaft and a base end attached to the brake master cylinder housing. An electrical brakelamp switch is attached to the brake master cylinder housing adjacent one of either the front end surface or the rear end surface. The electrical brakelamp switch has a stationary portion with a first electrical contact and a moveable portion with a second electrical contact positioned across from the first electrical contact. Finally, the switch portion of the assembly is sized and arranged in order to prevent damage to the electrical brakelamp switch in the event of hydraulic fluid loss within the brake master cylinder housing and advancement of the shaft to its advanced position.