US2206730A - Lubricating saw handle - Google Patents

Description

y 1940- A. PIHLQUIST ET AL 2,206,730

LUBRICATING SAW HANDLE Filed April 8, 1939 NVENIO war I 0/7 ATTORNEY.

Patented July 2, 1940 ENT OFFICE LUBRICATING SAW HANDLE Albert Pihlquist, Hicksville, and Arvid Larson, East Hempstead, Long Island, NLY.

Application April 8, 1939, Serial No. 266,750 r 1 Claim. (01. 145--35) a:

. The purpose of this invention is to provide a lubricating device that may readily be installed in the handle of a saw which will operate a fluid M under pressure along both sides of the sawand substantially throughout the length thereof, and which is so constructed that it does not change the design of the handle.

The invention is a sawhandle having an open space forming a lubricant reservoir therein, with a pump positioned in the reservoir, and a discharge connection extending from the pump to a point adjacent the saw blade, in which the connection is divided, conveying the lubricant n to both sides of the saw.

Other devices have been provided for lubricating saws, and, although some of these are incorporated in the handle, they require a handle of a special design, and those that eject a spray under pressure use mechanical parts on izothe outside of the handle, and those that do not use a pressure spray make it necessary to withdraw the saw from the kerf and hold it with the blade extending downward so that the lubricant will run out of the reservoir and along the surfaces of the blade.

The object of this invention is, therefore, to improve devices of this nature by installing a simple pump in an opening forming a reservoir in the grip of the handle and providing ejecting 35 handle of the saw without changing the exte+ j rior design of the handle.

Another object is to provide a saw lubricating device which is normally closed and which may readily be opened and operated by the same 40 movement and by a trigger.

Another object is to provide a sawlubricating device in which a substantial amount of lubricant may be contained in the handle.

A further object is to provide a saw lubricating 5 device incorporated inthe handle, in Which the supply of lubricant may readily be replenished.

And a still further object is to provide a saw handle having lubricating means incorporated therein which is of a simple and economical 60 construction.

With these ends in view the invention embodies a saw handle preferably made in two halves, with a substantial portion of the material of the grip of each half eliminated, provid- 55 ing an oil reservoir, a filling plug extending from :io means whereby the pump will discharge the the exterior of the handle to the reservoir and having a plug therein,-a pump positioned in the reservoir, a trigger adapted to operate said pump and a discharge connection extending from the pump to a point adjacent the inner end of the saw blade and in which the said connection is 3-3 of the grip of the handle.

Figure 4 is a detail showing a section through the nozzles in the forward side of the handle.

Figure ,5 is aview showing the lower end of the pump casing showing the openings therein.

In the drawing the device is shown as it may be made, wherein numeral I indicates the saw handle, numeral 2, a saw blade, and. numeral 3}"2'5 a pump adapted tobe incorporated in the handle.

In the design shown, the handle is formed of two f complementary halves adapted to be ccmented or secured together, and each half is cored providing an oil reservoir 4 and also pro- 3o viding a space 5 for the inner end of the trigger.

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, 6. The halves are dovetailed around the opening 4, with a continuous. groove 1 in one side,

and a continuous tongue 8 on the other half 1 adapted to extend into the groove, thereby sealing the lubricant in the reservoir. The reservoir is provided with a filling opening 9 having a plug Ill therein, and the operating or piston rod ll of the pump 3 extends upward through an opening I2 and through fibrous packing I3, providing sealing means for the upper end of the reservoir and through which the rod passes. The upper end of the rod II is attached to the end M of the trigger 6, and the trigger is fulcrummed at the point IS with the. end 6 extending outward through an opening IS in the two parts of the handle. It will be noted that, as the trigger 6 is drawn backward, it will raise the end [4 and thereby raise the pliuiger or piston I! of the pump 3 through the connecting rod l I, and as the piston moves upward, it will force a lubricant in the pump 3 upward through a discharged tube It, and the tube l8 extends outward through a passage in the handle, and is divided at the point l9 forming two smaller tubes 20 and 2| with nozzles 22 and 23 at their outer ends which extend outward slightly beyond. the surface 24 of the handle.

The small pump 3 is formed of a small tubular casing indicated by the reference numeral 3, and this casing is formed with the upper end closed, and a washer 25 with perforations 26 therein is held in the lower end forming a strainer, and it will be noted that, when the trigger 6 is released, a spring 21 in the pump casing will force the piston I! downward, and oil in the lower part of the casing will pass through an opening 28 in the piston, raising a thin flap 29 in a recess in the piston and positioned to cover the upper end of the opening 28. It will be noted that when the trigger is drawn backward, it will draw the piston upward in the casing, and the flap will then move downward forming a check valve pre venting the fluid passing downward through the piston, and thereby forcing the fluid upward through the tube I8, Pistons of this type are shown in Patents Nos. 826,071 and 660,136. The nozzles 22 and 23 arepositioned as shown in Figure 4, and it will be noted that, as a fluid-is ejected therefrom, it will travel outward and at the same time toward the saw blade so that it will substantially, cover the blade, lubricating both sides thereof. I

It will be understood that changes may be made in the construction without departing from the spirit of the invention. One of which changes maybe in the use of this device in a saw handle of any other design, another may be in the use of an oil reservoir of any other shape or design in the handle, another maybe in the use of other means for operating the pump,and still another may be in the use of nozzles of any other type.

The construction will be readily understood from the foregoing description. In use the device may be provided as shown and described, and it will be noted that the handle maybe-supplied as a separate and independent unit, and the saw may readily be attached in a groove 3B of the handle and held by bolts 3| which may be arranged at any suitable points. The handle is preferably formed of two halves cemented or bolted together after the parts have been inserted, and, although the handle may be made of any material, it is intendedv to use a substantially transparent or slightly colored transparent material so that the interior parts may readily be observed from the exterior, thereby making it center forming two similar halves having a grip with a hand opening through the handle, anda part in which a saw blade is secured positioned in front of the grip and opening. characterized in that the grip is cored out forming an interior reservoir therein, with the edges thereof sealed by a lip of one half of the handle extending into a recess of the other half, and also in that an area is also cored out above the reservicr providing space for an operatingtrigger, a cylinder pump in the reservoir and located in the lower end thereof of the type having a piston therein with inlet openings in the lower end and with a discharge tube extending from the upper end upward through the reservoir, through a passage in the sections of the handle to a point adjacent the edge of the saw blade where it is divided into two parts, providing two nozzles positioned on opposite sides of the saw blade and adapted to eject a lubricant, spraying the lubricant over substantially the entire length of the saw blade, said pump having a piston and an extended piston connecting rod passing through a sealed opening in the upper end of the reservior and into the area provided for .the trigger, and a trigger substantially in the form of a bell-crank positioned substantially against the lower surface of the area provided therefor, with one end attached to the upper end of the piston connecting rod and normally in a horizontal position, with the other end extending downward through an orifice in said area and into the upper end of the hand opening through the handle and positioned to be readily engaged by the forefinger of a hand gripping the handle, said trigger fulcrummed against a portion of the rear wall of said orifice, the inner end of said trigger being attached to the connect- .ing rod and adapted to move upward as the end

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