Rotary expansible chamber devices – Grooved abutting cylinder-rotating member end surfaces – Non-working fluid directed to groove
Patent
1978-03-22
1981-03-10
Vrablik, John J.
Rotary expansible chamber devices
Grooved abutting cylinder-rotating member end surfaces
Non-working fluid directed to groove
418 81, 418 82, 418 94, 417372, F04B 3500, F04C 2902
Patent
active
042550980
ABSTRACT:
An improved rotary vane machine assembly of the type utilized for producing vacuum in motor vehicle power brake assistance units wherein a compensating coupling connects the pump drive shaft with the drive motor of the pump and a lubricant is supplied to the working elements of the pump from said drive motor, the improvement comprising a pot-shaped hood which receives the working components of the pump and, in particular, the rotor and vanes, and a mounting flange having a bell-shaped foot portion surrounding the compensating coupling and a lid portion covering the open end of the pot-shaped hood. A compensating disc which limits the operating chamber of the working components in an axial direction is also disclosed, the compensating disc being pressed against the face of the vanes by means of a cushion of lubricant and/or a compression spring.
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patent: 2902012 (1959-09-01), Malcolm
patent: 3865515 (1975-02-01), Allen
patent: 4086040 (1978-04-01), Shibuya et al.
patent: 4091638 (1978-05-01), Mitch
Barmag Barmer Machinenfabrik Aktiengesellschaft
Shurtleff John H.
Vrablik John J.
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