Pivotal closing member
AssigneeDr. Ing. h.c.F. Porsche Aktiengesellschaft
InventorKlaus Groger
Life of this patent
Estimating the term…
Abstract
A throttle valve for regulating the introduction of a fuel-air mixture into an internal-combustion engine is provided with a return spring system. The return spring system includes a first coiled spring, a second coiled spring, a hat-shaped bushing for separating the two spring coils and a lever, fixed in relation to a throttle valve housing, for simultaneously loading both spring coils to yieldably urge the throttle valve toward a normal position. The return spring system is positioned at one end of a shaft on which the throttle valve is mounted and operates to yieldably rotate the shaft in a selected direction to orient the throttle valve.
Claims2
A return spring system for a throttle valve comprising:
- a housing;
- a shaft rotatably mounted in said housing;
- a valve attached to said shaft;
- a lever attached to said shaft;
- a multiplicity of spring members having coils of different diameters and being concentrically arranged, each of said spring members having a first end attached to said lever and a second end attached to said housing, said spring members include an outer spring member concentrically disposed around an inner spring member;
- wherein the lever includes an opening for receiving said first end of the inner spring member and the housing includes a recess for receiving said second end of the inner spring member, and the housing includes a stop member for engaging said second end of said outer spring;
- and said outer spring first end includes a bent portion engaging an edge of said lever, all of said spring members urging said shaft in a uniform direction;
- a bushing attached to said shaft disposed intermediate said outer spring member and said inner spring member, said bushing having an opening for receiving said first end of said inner spring;
- a loading means including said lever for loading said inner and outer spring members for urging said shaft in a uniform direction;
- and
- a retaining means for retaining the lever in a first position, said retaining means including a screw member in threaded engagement with the stop member of the housing, the screw member being movable to engage the lever.
Dependencies are inferred from the claim text.