Device for the lubrication of the rotating hook in a sewing mach

Details Device for the lubrication of the rotating hook in a sewing mach Device for the lubrication of the rotating hook in a sewing mach

1990-10-12

1992-06-02

Nerbun, Peter

Sewing

Elements

Lubricating

D05B 7102

Patent

active

051177730

ABSTRACT:
A lubrication device for a rotating hook in a sewing machine, having a hook shaft provided with a hollow interior axially thereof, an inlet and an outlet communicating with the hollow interior for prevention of oil pressure build-up therein as oil is supplied from an oil reservoir, a restriction between the inlet and the outlet for decreasing the diametrical extent of the hollow interior, and a closure for one end of the hollow interior provided with an oil supply channel communicating with the hollow interior, the oil supply channel having an axis positioned either eccentrically or concentrically of a longitudinal axis of the hook-shaft and an insert part to prevent the porous material from resting at the bottom of the interior of the hook-shaft, when the machine is stopped.

REFERENCES:
patent: 2531362 (1950-11-01), Parry
patent: 2848967 (1958-08-01), Nicolay
patent: 3060877 (1962-10-01), Ketterer
patent: 3068820 (1962-12-01), Ketterer et al.
patent: 3272164 (1966-09-01), Keller
patent: 3955520 (1976-05-01), Gebhardt

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