Reciprocating stroke length adjustment device and method
US4263825A · kind A · utility
4Cited by
5References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 20, 1979 |
| Grant date | Apr 28, 1981 |
| Priority date | — |
| Expiry date | Jul 20, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/1642
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The adjustment screw that regulates the stroke length of the piston that drives a diaphragm pump is rotated by means of a clutch and "diamond-back" screw structure. By selectively engaging either of two oppositely oriented one-way clutches, one of two respective associated nuts that ordinarily rotate freely on the "diamond-back" screw is blocked from rotation when the screw moves longitudinally in one direction. Thus locked, the nut compels the "diamond-back" screw to rotate, thereby turning the adjustment screw with which it is connected in order to produce the desired increase in piston stroke length.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.