Patent US1351562A successfully refreshed from Google Patents.
US4284019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricant sealing device for sewing machines
Assignee: Rockwell-Rimoldi SpA
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Filing: 1980-07-24
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Granted: 1981-08-18
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Expires: 2000-07-24
Abstract
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.
Inventors
- 👤 Franco Marchesi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:39
CPC Classifications
D; D05; D05B; D05B71/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
214 words
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.
Claim 2
Dependent Claim
214 words
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.
Claim 3
Dependent Claim
20 words
The lubricant sealing device according to claim 1 wherein said sealing element is fabricated from a wear resistant resilient material.
Claim 4
Dependent Claim
40 words
The lubricant sealing device according to claim 2 wherein said sealing element includes inclined surface (46) interconnecting walls (45) with the remainder of said element forming surfaces for directing excess lubricant removed from the slide members to said receiving means.
Claim 5
Dependent Claim
39 words
The lubricant sealing device according to claim 3 wherein said walls (45) are of substantially reduced width relative to the remainder of said sealing element for effecting yielding movement thereof with the alternate horizontal movements of the slide members.
Claim 6
Dependent Claim
58 words
The lubricant sealing device according to claim 2 wherein said sealing element includes diverging inclined surfaces (56,57) defining a centrally disposed peripheral groove within said opening 44 and aligned spaced walls (58,59) of substantially reduced width relative to the remainder of said sealing element for effecting yielding movement thereof with the alternate horizontal movements of the slide members.
Claim 7
Dependent Claim
66 words
The lubricant sealing device according to claim 1 wherein said means for mounting said sealing element (43) in said recess (35) defines a support member (36) including: (a) a horizontal cross-piece (38); (b) a pair of spaced leg members (37) depending from said cross-piece; and (c) means forming the outer opposed surfaces of said leg members for locating said support member (36) in said recess (35).
Claim 8
Dependent Claim
49 words
The lubricant sealing device according to claim 6 wherein said recess (35) includes a pair of spaced plate members (40) fixed therein and said locating means defines a longitudinally extendng groove (39) in each of said leg members into which the opposed sides of said plate members (40) extend.
Claim 9
Dependent Claim
37 words
The lubricant sealing device according to claim 6 wherein said cross-piece (38) includes means defining a transverse slot (48) for preventing restriction of movement of said sealing element during the laternate vertical movements of the slide members.
Claim 10
Dependent Claim
40 words
The lubricant sealing device according to claim 1 wherein said receiving means defines a lower surface (52) of said channel (34) slanted downwardly toward the lubricating chamber and a vertical channel 55 interconnecting the latter with said lower surface (52).
Claim 11
Dependent Claim
44 words
The lubricant sealing device according to claim 9 wherein said receiving means further includes a means defining a hopper-shaped recess (53) for receiving excess lubricant migrating beyond said lower surface (52) and a passageway (54) interconnecting said recess (53) with said vertical channel (55).
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-17 | 1985-02-16 | 1985-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-17 | 1989-02-16 | 1989-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-17 | 1993-02-16 | 1993-08-18 | $7700.00 | Window Closed / Lapsed |