Rotary expansible chamber devices – Non-metallic working member – cylinder or partition – Resilient
Patent
1988-02-11
1990-01-02
Vrablik, John J.
Rotary expansible chamber devices
Non-metallic working member, cylinder or partition
Resilient
418178, 418195, 74425, 74439, 267161, 267182, F01C 302, F01C 308, F01C 502, F16F 100
Patent
active
048909890
ABSTRACT:
In a positive displacement machine, a rotor has screw grooves in which pressure chambers are variably limited, at one end, by teeth of a plastic pinion which is the front element of a composite pinion meshing with the grooves. A metal backing pinion supports the plastic pinion. The metal pinion and plastic pinion are rotatable with respect to each other about the axis of rotation of the composite pinion, in conjunction with a deformation of a resilient angular coupling provided between them. This coupling is a metal blade at least partly surrounding the backing pinion shaft between the plastic pinion and the backing pinion, in a groove of the backing pinion. One end of the blade is secured to the plastic pinion, the other end of the blade is secured to the backing pinion. Several embodiments of the blade are disclosed.
REFERENCES:
patent: 1619799 (1927-03-01), Rounds et al.
patent: 3959988 (1976-06-01), McNamee
patent: 4640147 (1987-02-01), Yasukawa et al.
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