US2053607A

US2053607A - Fuel pump protector

Info

Publication number: US2053607A
Application number: US67738A
Authority: US
Inventors: James E Foster
Original assignee: Individual
Current assignee: Individual
Priority date: 1936-03-07
Filing date: 1936-03-07
Publication date: 1936-09-08
Anticipated expiration: 1953-09-08

Description

Sept w36.' J. E. FOSTER f FUEL PUMP PROTECTOR Filed March 7, 19:56

` Srwentor Fig.2.

Patented Sept. 8, 1936 site stares earner tries 3 Claims.

This invention relates to a fuel pump protector for use upon motor vehicles employing internal combustion engines as a motive power, the pump referred to being depended upon for supplying the 5 carbureter with liquid fuel from th-e supply tank of the vehicle, the operation of these pumps generally being that, at each rotation of the crank shaft, a limited quantity of liquid fuel Will be drawn from the supply tank and delivered.

In the use of these pumps it is well known that when the vehicle is exposed to freezing temperatures, a flow of liquid fuel, such as gasoline, through the pump-valve will often be prevented on account of condensation or a frozen condition of the liquid fuel in the pump.

The invention has for its object, broadly, to provide a frost-protector or means to prevent condensation or freezing of the fuel in the pump.

Other objects of the invention will appear in the written description and accompanying drawing and as pointed out by the appended claims, it being understood that I may make changes in form, size, proportion of parts and kinds of material as found to be of advantage, said changes being within the scope of the invention as claimed.

In the drawing, Fig. l is a view in side elevation of a fuel pump, and broken away parts showing its operating connections.

Fig. 2 is a side view of the pump taken at rightangles to the view shown in Fig. 1, a heat-insulating jacket on the pumpcasing being shown in longitudinal section, and Fig. 3 is av plan view of a coupling-band.

Referring now to the drawing for a more particular description, the invention is shown and described in connection with a two-part fuel pump best shown in Fig. l, the body-portion l of the pump casing being provided with an intake pipe 5 in communication with a fuel supply tank (not shown) and having an exit-pipe l for conducting fuel from the pump to the carbureter of the engine, said part l being provided near its top with a flange l.

The lower part of the pump-casing is indicated at 8, and at 9 .are indicated coupling-ledges for the parts l and S of the casing secured together by bolts lll.

The parts thus mentioned relate to a fuel pump in general use, but it will be understood that the herein described protector may be applied to other types of fuel pumps.

In Fig. l of the drawing is shown means for operating the pump, a part of a rotatable crank 55 shaft l l being provided with a projection I2 (Cl. 10S-202) adapted, at each rotation of the crank shaft, to engage and move a coupling-rod or plunger I3 against the force of a spring (not shown) for moving a valve-rod i4 of the pump.

During sub-zero weather, vapor in the gasoline 5 supply tank will become condensed, and the water thus formed, heavier than oil, will become mixed and will move wtih gasoline to the fuel pump, and on account of the exposed surface of the pump casing the mixture will often become frozen in the l0 pump.

It has been found that by the use of the herein described protector the fuel mixture in the pump will not become frozen by reason of exposure to low temperatures, said protector consisting, in 15 part, of a heat-insulating band i5 adapted to fill the annular depression in the casing 4 between the flange l and coupling-ledge 9 thereof, the remaining part of the protector for the upper casing l being a heat-insulating cap il adapted to 20 overlap the band l5 and great-er portion of the part fl of the pump casing.

The protector for the part l as thus described answers all purposes in preventing the condensation or freezing mentioned except during extreme 25 cold Weather, but to provide protection against extreme low temperatures the heat-insulating cap i8 is provided for covering that part of the pump-casing indicated at 8.

As thus described, the parts Il and i8 of the insulators may be readily removed from the pump-casing whenever required. However they are normally disposed slidably upon said

parts

4 and 8 of the pump-casing with the flat surfaces at their open ends engaging the ledges 9, and to prevent accidental removal of the lower part I8 or either part ll or i8 they are removably connected by any suitable means, the means herein shown for this purpose being a compressor or coupling-band i9 provided at its ends with fastening 40 devices 2@ for pressing said band against the adjacent end-portions of said insulators, the lugs 2l of said band being adapted to engage therein as shown in Fig. 2.

The use of the protector, .as described, not only prevents condensation or freezing of the contents of the pump but it permits a free flow of the liquid at all times, for the gasoline moves sluggishly when partly frozen, and the use of the protector maintains the pump and contents above the freezing point.

Relative to the parts l5, I1 and i8, any suitable insulating material may be used, and I have used asbestos for these parts to advantage.

I claim as my invention,-

1. A protector for a fuel pump having a. twopart valve casing provided exteriorly with an annular recess, comprising a band within said recess, a heat-insulating-cap on one part of the casing overlapping said band, a second heat-insulatingcap on the other part of said casing, and a coupling-element on the two caps for securing them together.

2. A protector for a fuel pump having a twopart valve casing provided exteriorly with an annular recess, comprising an insulating band withprojections arranged to be pressed into said insu- 10 lating-caps.

JAMES E. FOSTER.