Cutlery – Combined cutlery or combined with ancillary feature – With means to apply transient fluid to tool
Patent
1980-10-30
1982-10-12
Peters, Jimmy C.
Cutlery
Combined cutlery or combined with ancillary feature
With means to apply transient fluid to tool
83169, 13754313, B27B 1712, F16N 714, F16N 1322
Patent
active
043531636
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
Heretofore oiling systems of prior art chain saws and the like used oil pumps carried or driven intermediately of the drive shaft and having complex valves such as alternately operative pairs of ball or check valves. Whenever an external adjustment was present, the flow was being remotely controlled and the oil was never being delivered at the point of adjustment.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide an improved automatic oiling system for chain saw which overcomes the prior art disadvantages; which is simple, economical and reliable; which has an oil pump mounted at the end of the drive shaft; which pump has an eccentric rotor with yieldable vanes; which pump has parallel tangential inlet and outlet; which has oil flowing through an externally accessible adjustment member for the control valve; which has a unidirectionally control valve; which has a two position control member, one position being a check valve and the other position being to regulate the flow through a transition section; and which uses a spring biased unidirectional valve able to open a pre-set distance upon the pump operating and to coact with an adjustment member to regulate the flow of oil through said member.
Other objects and advantages will be apparent from the following description of the invention, and the novel features will be particularly pointed out hereinafter in the claims.
BRIEF DESCRIPTION OF THE DRAWINGS
This invention is illustrated in the accompanying drawings in which:
FIG. 1 is a perspective view of chain saw embodying the novel automatic oiling system of the present invention.
FIG. 2 is a schematic view of chain saw embodying the improved oiling system of the present invention.
FIG. 3 is an elevational view, partially cut away, showing the location of oiling tank and control valve, respectively.
FIG. 4 is an elevational view, partly in section, taken along line 4--4 of FIG. 3, showing the control valve.
FIG. 5 is an elevational view, partly in section, taken along line 5--5 of FIG. 3, showing the oil pump.
FIG. 6 is an enlarged elevational view, partly in section, of the control valve of the present invention, being closed.
FIG. 7 is an enlarged elevational view, partly in section, of the control valve of the present invention, opened.
FIG. 8 is an enlarged elevational view, partly in section, of the control valve of the present invention, opened an additional turn of the adjusting screw.
FIG. 9 is an elevational view taken along line 9--9 of FIG. 6.
FIG. 10 is a sectional, elevational view taken along line 10--10 of FIG. 6.
FIG. 11 is an exploded perspective view of the oil pump of the present invention.
FIG. 12 is a schematic, elevational view of the oil pump of the present invention.
DESCRIPTION OF THE INVENTION
A portable power driven chain saw designated generally 20 is shown in FIG. 1 and embodies the present invention. The chain saw 20 has a housing 22 from which a guide bar 24 extends forwardly therefrom, and is mounted to the housing at a guide pad 26 by means of a stud 28 and guide pin 30 and over which is affixed a cover plate 32 with a nut 34 threaded to the stud 28, as shown in FIGS. 1 and 3. An endless saw chain 30 is entrained on the guide bar 24 to be driven by a suitable motive means as, for example, an electric motor (not shown) housed in a motor casing 36 to drive an output shaft 38 illustrated in FIGS. 2 and 5 through a gear 40 from a motor pinion 41.
The motor is energizable by a trigger switch 42 mounted in a rear handle 44 and connected to a source of electricity by an electric cord 46. The housing 22 has a transverse top handle 48 which combined with handle 44 permits the chain saw 20 to be easily held and controlled during operation. The handle 44 is enclosed and widened at the bottom thereof by a lower portion 50 which protects the operator's hand from beneath. Forwardly of top handle 48 is a brake lever 52 shown in FIG. 1 in the non-braking position which, when pivoted clockwise toward the guide bar 24, will actu
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Overbury Douglas G.
Overy Colin
Black & Decker Inc.
Murphy Edward D.
Ottesen Walter
Peters Jimmy C.
Weinstein Harold
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