Spring brake actuator with release tool requiring limited axial space
US5636562A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 15, 1995 |
| Grant date | Jun 10, 1997 |
| Priority date | — |
| Expiry date | Aug 15, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T17/086
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A brake release tool incorporates a two-part structure wherein a portion accessible from outside the brake actuator does not move axially away from the brake actuator during caging. In this way, less room is necessary outwardly of the brake actuator housing than has been required in the prior art. An operator turns an outer bolt, which turns a threaded inner nut. The threaded inner nut moves axially to contact a piston, and moves the piston to cage the power spring. The bolt need not move axially outwardly, although in one embodiment it may move slightly axially inwardly as the spring is caged to provide a visual indication that the spring is not uncaged.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.