Chain saw
First Claim
1. A chain saw provided with an electromagnetic pump for feeding lubricant to saw chain, comprising an engine speed sensor for sensing the rpm of an engine and a microcomputer for controlling the operation of the electromagnetic pump, wherein;
- said microcomputer having stored therein a plurality of stepped lubricant feeding patterns covering the number of actuations of the electomagnetic pump, the actuation frequency and the period of time of each actuation so as to control automatically the feeding of lubricant to the saw chain from the electromagnetic pump in response to the engine speed sensor to effect lubricant feeding in conformity with the sawing condition.
1 Assignment
0 Petitions
Accused Products
Abstract
A chain saw including an electromagnetic pump (4) for feeding lubricant to saw chain operative in response to an engine speed sensor (5) for sensing the rpm of an internal combustion engine and a microcomputer (6) for controlling the operation of the electromagnetic pump (4). The microcomputer (6) stores a plurality of lubricant feeding patterns covering the number of actuations of the electromagnetic pump (4), the actuation frequency and the period of time of each actuation so as to control automatically the feeding of lubricant to the saw chain from the electromagnetic pump (4) in response to the engine speed sensor (5) to effect lubricant feeding in conformity with the sawing condition.
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Citations
3 Claims
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1. A chain saw provided with an electromagnetic pump for feeding lubricant to saw chain, comprising an engine speed sensor for sensing the rpm of an engine and a microcomputer for controlling the operation of the electromagnetic pump, wherein;
said microcomputer having stored therein a plurality of stepped lubricant feeding patterns covering the number of actuations of the electomagnetic pump, the actuation frequency and the period of time of each actuation so as to control automatically the feeding of lubricant to the saw chain from the electromagnetic pump in response to the engine speed sensor to effect lubricant feeding in conformity with the sawing condition. - View Dependent Claims (2, 3)
Specification