Massey-ferguson Inc.

Edwin J Skiba

Robert M Dwyer

A tractor draft sensing apparatus capable of sensing only draft forces. This invention is usable with a tractor provided with draft links (14) and includes a mounting member (30) to which the forward end of the draft links are secured by a mounting pin assembly (26), the mounting member in turn being secured by a support pin assembly (36) to a support plate (34) which is in turn secured to the tractor. The center lines of the mounting pin assembly (26) and the support pin assembly (36) lie in a vertical plane. A spring extends away from the support member and one end of it is disposed between restraining assembly (46). Sensing apparatus (72) are disposed adjacent and outwardly of the restraining assembly and is contacted by one end of a sensing arm (66), the other end of which is secured to the mounting member (30). The foregoing structure cancels deflections imposed by heavy draft loads and causes the sensor (72) to respond only to horizontal draft forces.

Tractor draft sensing apparatus

A compound master brake cylinder assembly (10) for a braking system, the cylinder assembly having a reservoir (34), a first low pressure cylinder (72), and a removable high pressure cylinder (58). A relief valve (84) is provided with a poppet valve (104) normally biased to a closed position. The relief valve (84) extends between the low pressure cylinder (72) and reservoir (34) and is responsive to first cylinder (72) pressure and outlet pressure through pilot passageways (114 and 111, respectively) to vent fluid from cylinder (72) to reservoir (34) to progressively reduce the pressure in the cylinder to insure that the force applied by push rod (14) does not substantially vary while cylinder (72) pressure is being reduced after outlet pressure exceeds a predetermined position.

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Sterling Heights, MI, United States of America

Edwin J Skiba