Lubricant feed system
US4094382A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 21, 1976 |
| Grant date | Jun 13, 1978 |
| Priority date | — |
| Expiry date | Jun 21, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB27B17/12
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A lubricant feed system for use in lubricating the cutting attachments of a chain saw having an internal combustion engine and a lubricant tank. The feed system has a system of passageways permitting flow of lubricant from the tank to the guide bar. A check valve and a manually operable plunger are positioned in the passageway and spaced from each other to define a first chamber. The check valve permits flow from the tank to the bar pad and is openable by pressure in the tank. A metering valve for regulating the flow from the check valve to the bar pad is reciprocable between a closed and an opened position. The reciprocation and thus the position of the valve are controllable by manually operable means extending from the metering valve to the exterior. The metering valve has means to urge it to the closed position. The urging means exerts a force that can be overcome by operation of the plunger. There are means to permit the metering valve to move to a fully open position by the operation of the plunger regardless of the position of the metering valve. Thus operation of the plunger closes the check valve, opens fully the metering valve and forces lubricant contained in the first c…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.