Lubricant sealing device for sewing machines
OwnerFranco Marchesiinventor
Life of this patent
Estimating the term…
Abstract
A lubricant sealing element for the slide members which actuate the feed dogs in a sewing machine fabricated from a resilient wear resistant material and having lubricant scraping surfaces formed by spaced walls defining an opening conforming in size to the cross-sectional configuration of the slide members and through which the latter extend. The sealing element is mounted for sliding movement restricted to the alternate vertical movement of the slide members and the spaced walls are of a thickness approximately one third the thickness of the remainder of said element which permits them to yield first in one direction and then the other with the alternate horizontal movement of the slide members.
Claims10
A lubricant sealing device for the slide members which actuate the feed dogs in a sewing machine of the type having a housing with a lubricating chamber containing driving elements for the slide members and from which the latter extend to support the feed dogs in the machine's sewing zone, said sealing device comprising:
- (a) a support bracket (31) mounted in the housing having an inner end communicating with the lubricating chamber and extending from the latter in the direction of the sewing zone, which includes:
- (i) a channel (34) through which the slide members extend and guided for alternating vertical and horizontal movement by the driving elements;
- and
- (ii) means defining a recess (35) extending from said channel (34) to said inner end;
- (b) a sealing element (43) having lubricant scraping surfaces formed by spaced walls defining an opening (44) of a size conforming to the cross sectional configuration of the slide members and through which the latter extend;
- (c) means for mounting said sealing element in said recess (35) for sliding movement restricted to the alternate vertical movement of the slide members;
- and
- (d) means operatively associated with said channel (34) for receiving excess lubricant removed from the slide members by said spaced walls and returning the same to the lubricating chamber.
Dependencies are inferred from the claim text.