US1615701A

US1615701A - Valve-lifting apparatus

Info

Publication number: US1615701A
Application number: US20840A
Authority: US
Inventors: Harry C Hughes
Original assignee: Individual
Current assignee: Individual
Priority date: 1925-04-04
Filing date: 1925-04-04
Publication date: 1927-01-25
Anticipated expiration: 1944-01-25

Description

Jan. 25 1927.

H. c. HUGHES VALVE LIFTING APPARATUS Fild April 4A, 19'25 jf @f Patented Jan. 25, 1927.

narran srarss HARRY C. HUGHES, OF CINCINNATI, OHIO.

VALVE-LIFTING APPARATUS.

Application filed April 4:, 1925. Serial No. 20,840.

My invention relates to apparatus 'for the lifting and removal et valves 'tor grinding the same or valve renev-Jal. in automotive enn glues.

rlhe problem o'l' valve hitting and removal is al serious one in automohile practice, hecanse of the eonlined space in which the operator can work, and the heavy tension or the springs, and the presence o'l' the valve litters operated hy the engine. y

lt is the object oft my invention to provide a mechanism and process -tor removing and replacing oit the usual valves 'tound in autol motive engines at the present day, same particularly designed to facilitate the elevation o't the bottom retaining pan so that the valve key is available and the stem can he liitted clear out oit'the casing that contines it, and as readily inserted again. Q

The operator is provided with a ew simple implements which are easy to employ, and among other things, I provide a threader for passing through the valve guide, which threader will hold and guide the spring, and retain the lower pan.

I accomplish my objects ley that certain construction and arrangement of parts to he hereinafter more specifically pointed out and claimed.

In the drawings:

Figure 1 is a section showing a valve in place and seated.

V Figure 2 is a like view showing the valve raised. ley the lifting pin and with a retaining tool inserted beneath the pan.

Figure 3 is a like view showing the valve head released so as to lower the retaining pin.

Figure 4L is a like view showing the valve removed and the threader holding the spring and pan in place, with the pan supported hy the tool.

Figure 5 is a perspective ot the tool.

Figure 6 is a perspective ot the threader Figure 'l' is a perspective et a modified threader.

Referring to the frame parts ci the motor in which the valve is located I have selected a simple Yform ot structure in which the valve seat 1 is in a wall 2 ot the machine casing, the guide 3 for the valve stem is sup' ported between two welos 4 and 5, and the lifting pin is mounted and guided in a hess 6 of the casing. I have not shown the cam sha-ft operation of the lifting pins, which is as customarily practiced in automobile engines.

The valve is shown as having a head 7, a stem 8, and 'a key 9. This key 9 holds a pan or dish shaped washer 10 in place against the 'torce oliv al compression spring l1, arranged around the valve stem and abutting at its upper end against the weh 5 of the valve stem guide.

rThe lifting pin 12 engages the lower end et the valve stem and in the operation ol the engine raises the valve from its seat.

ln carrying out my process the iirst step is to revolve the engine crank shaft, tl'ierelrv causing the cam shaft to raise a selected valve stem. lVhen the stem is raised so that the valve is unseated, a tool Ta can he inserted under the head it an additional lift against the spring, and thereupon the retaining tool 13 is employed.

This tool is in the form of loar terminating in a U-shaped piece of suiiicient width, which is inserted under the pan on the valve stem resting against the hase of the boss 6, or resting at any other convenient point The U-.shaped end of the tool is open toward the operator, engage the pan without engaging the valve stem or key.

The lifter which has propped up the valve head, is removed when the tool has heen insert-ed, thereby permitting the valve stem to drop by gravity, and thereby exposing the key. The valve is turned around until the key is properly presented to the operator, who then reaches into the open space lel't loy the tool, and pulls out the key.

The valve is then lifted clear out of the guide spring, and pan. Now the small end of the threader is pushed up through the pan, spring and valve guide occupying the normal position of the f'alve stem, Figure 4. The threader is lowered hack through valve guide and removed trom engine `together with spring and pan. Thereupon the grinding can proceed without interferY ence of the spring.

When the valve is to he replaced, the threader is also used. It is y stiff wire 141, having a knob 15 secured thereto which is of larger diameter than the valve stem. The operator pushes the end 16 of the wire up through the pan and spring, and through the valve stem guide, so that he can grasp the end 16 from above. A. loop formed of a Jairof the valve to give and is of suthcient diameter to 'I whereupon he can insert at the end 16 will be convenient for handling.

The operator then pulls up on the threader to compress the spring sui'liciently to permit the tool 13 to be inserted under the pan again, and pulls the threader back out of the Way. He then drops the valve into place with its end coming below the pan Within the open portion of the U-shaped tool piece,

the key, and remove the tool.

The simplicity of this operation Will at once recommend itself to anyone Who has attempted to remove and grind the valves of an automobile engine.

If the threader is of the form of Figure 7, it can be dropped through the parts from above. The cable 30 of this structure has a ring 3l of less size than the valve stem. When the ring 3l is dropped down through the parts, the pin 32 Will be set into the ring so as to prevent the pan from slipping over the ring.

I am aware that it is old to block up the pan oil" a valve with a piece of metal, so as to get at the key, but my tool is a device which can be readily inserted and removed, and prevents the necessity of tumbling around with a block .which may fall out of place, and in fact frequently does do so.

Having thus described my invention, What I claim as new and desire to secure by Letters Patent, is

l. A process of removing and replacing valves from internal which consists in iirst raising the valve rod to compress the spring, then holding up the pan and spring on the valve rod and permitting the stein to drop in a manner that Will expose the key, then pulling out the key, and removing the valve, then replacing the valve by a stringer ruiming through the spring and pan and preventing the pan from coining oil' the Stringer, passing the Stringer through the valve guide, and pulling it up to compress the spring, and iinally reversing the operations now described.

2. A method of replacing valves in in` ternal combustion engines which consists in passing a Stringer through the pan and spring, and preventing the Stringer from pulling through the pan, passing the Stringer through the valve stem guide, and pulling it up to compress the spring, blocking up the pan to hold it in elevated position, removing the stringer, replacing' the valve stem to bring the key opening therein beloiv the pan, inserting the key and removing the blocking device, substantially as described.

HARRY C. HUGHES.

combustion engines