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Class Information
Number: 418/234
Name: Rotary expansible chamber devices > Tapered vane or abutment (e.g., wedge shaped)
Description: Apparatus comprising a vane or abutment which has (1) nonparallel or (2) semi-circular surface portions to engage adjacent surface portions of a vane or abutment slot respectively, in which it moves incident to the expansion and contraction of the working chamber.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6913451 |
Vacuum pump with fail-safe vanes |
Jul. 5, 2005 |
| 5509388 |
Internal combustion rotary engine |
Apr. 23, 1996 |
| 5409360 |
Vacuum pumps |
Apr. 25, 1995 |
| 5269668 |
Folding-unfolding rotating flap meter-motor-pump |
Dec. 14, 1993 |
| 5156541 |
Revolving vane pump-motor-meter with a toroidal working chamber |
Oct. 20, 1992 |
| 5007813 |
Rotary rolling piston compressor with fixed vane having a relieved incline section |
Apr. 16, 1991 |
| 4090825 |
Plate with passages for fluid rotative machines |
May. 23, 1978 |
| 4012182 |
Machines for energy conversion |
Mar. 15, 1977 |
| 4009690 |
Rotary internal combustion engine |
Mar. 1, 1977 |
| 3985473 |
Rotary pump |
Oct. 12, 1976 |
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