Unit for delivering fuel to an internal combustion engine

Details Unit for delivering fuel to an internal combustion engine Unit for delivering fuel to an internal combustion engine

2007-11-27

2007-11-27

Denion, Thomas (Department: 3748)

Rotary expansible chamber devices

Working chamber surface expressed mathematically

C418S150000, C418S148000, C418S077000, C418S206500

Reexamination Certificate

active

10565560

ABSTRACT:
A roller cell pump having a shaped sliding surface composed of elliptical portions results from two different equations. The function of the unit is improved because the equations are modified and include adaptable parameters, so that by adaptation of the parameters, the shaped sliding surface can be adapted in portions optimally to the requisite function in that particular region of the shaped sliding surface, for instance the function of generating an underpressure or an overpressure. The course of the radii of the elliptical portions corresponds, at least in portions, to one of two equations that differ from the prior art.

REFERENCES:
patent: 4480973 (1984-11-01), Ishizuka
patent: 4515514 (1985-05-01), Hayase et al.
patent: 4538977 (1985-09-01), Ruhl et al.
patent: 4737090 (1988-04-01), Sakai et al.
patent: 28 35 457 (1980-03-01), None
patent: 3824882 (1990-01-01), None

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