Female coupler for a fluid circuit

Details

Inventors: Kugler, Uwe H.;
Assignee: Deere & Company (Moline, IL)
Primary Examiner:
Assistant Examiner:
Attorney, Agent or Firm:

A female coupler for engagement with a male coupler which has a spring loaded check valve, the female coupler includes a main poppet valve biased to a normally closed position and movable by the check valve in the male coupler to a fully opened position, a piston responsive to fluid pressure in the female coupler to force the main poppet valve to an intermediate position and open the male coupler check valve, a flow check prevention valve for normally maintaining a predetermined pressure of the fluid acting on the piston, and a second poppet valve to relieve the fluid acting on the piston.

DETAILED DESCRIPTION This invention relates to a female coupler and has for its object to provide a female coupler which retains all the desirable features present in prior art couplers but which has fewer parts, is less expensive to manufacture, is easily repairable and eliminates the problems of valve binding present in the prior art.
Another object of the present invention is to provide an improved female coupler which is retrofittable to existing coupler housings, that is, if an old coupler needs to be replaced the improved coupler according to the present invention can be used in the same housing and same location as the old coupler was used.
The above objects and additional objects and advantages of the present invention will become apparent to those skilled in the art from a reading of the following detailed description when taken in conjunction with the accompanying drawings.

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