Buffer device for transmission operating booster
AssigneesNissan Diesel Motor Co., Ltd., Sanwa Seiki Ltd.
InventorsIsao Okamoto, Jun Kajinami, Kazunari Imasato
Life of this patent
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Abstract
A transmission operating apparatus includes a booster for increasing the transmission operating force, and a buffer device for suppressing rapid shift-changes caused by a change in the load due to the damper action of a hydraulic damper mechanism. A by-pass is incorporated into the buffer to permit working fluid to flow into damper chamber by-passing an orifice when necessary. A sealing member having a sealing portion is interposed in the by-pass to seal the by-pass under normal conditions but is resiliently deformed releasing the seal when the working fluid flows into the damper chamber.
Claims10
An apparatus for operating a transmission comprising a booster for boosting the transmission operation force, and a buffer device for suppressing a rapid shift-change operation caused by a change in the load due to the damper action of a hydraulic damper mechanism, wherein said damper mechanism comprises a damper chamber and an orifice via which an operation fluid flows into and out of the damper chamber, by-passing through which the operation fluid flows into said damper chamber by-passing said orifice, and a sealing member interposed in said by-pass, said sealing member having a sealing portion to seal said by-pass under normal conditions inclusive of when the operation fluid flows out from said damper chamber and to be deformed for releasing the seal only when the operation fluid flows into said damper chamber.
Dependencies are inferred from the claim text.