Expansible drive shaft tool mechanism
US4069749A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 6, 1976 |
| Grant date | Jan 24, 1978 |
| Priority date | — |
| Expiry date | Aug 6, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/9377
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An expansible drive shaft tool mechanism is disclosed in which mutually cooperating parallel drive shafts carry tool elements that can be shifted into and locked by shaft expansion in any of selected positions along such drive shafts. Applied hydraulic pressure in a sealed chamber causes outward expansion of a flexible outer sleeve member on each such shaft to grip the tool elements. An inner sleeve member closely encircled by the outer sleeve member and joined in sealed relationship therewith at opposite end portions forms the radially thin elongated annular sealed chamber into which the pressurized hydraulic fluid is forced by the action of a plunger type hydraulic pressure source housed inside the inner sleeve member cavity. Actuation of the hydraulic pressure source plunger passing through a cylindrical fluid take-up chamber by longitudinal displacement is effected by means of a pneumatic piston energizable through a connecting line including a low pressure rotary seal or union. Hydraulic fluid that may leak past a primary seal along the plunger is taken up in the seal chamber which, of cylindrical form, incorporates a sliding piston or seal element contacting the plunger and c…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.