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Publication numberUS1401075 A
Publication typeGrant
Publication dateDec 20, 1921
Filing dateMar 7, 1921
Priority dateMar 7, 1921
Publication numberUS 1401075 A, US 1401075A, US-A-1401075, US1401075 A, US1401075A
InventorsGeorge Hartwig
Original AssigneeGeorge Hartwig
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Piston-rod connection
US 1401075 A
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Description  (OCR text may contain errors)




Patented D afia E J h HIIIV ve t M g I UNITED STATES PATENT oFFIcs.



T 0 all whom it may concern:

Be it known that I, GEORGE HARTWIG a citizen of the United States, residing at st. Louis, in the State of Missouri, have invented certain new and useful Improvements in Piston-Rod. Connections, of which the following is a specification.

The present invention relates to means for connecting the pitman of an engine, preferably of the internal combustion type, to the piston head, and the object is the provision of simple means for this purpose that will constitute an effective coupling, allowing the necessary play of the parts and automatically taking up wear.

The preferred embodiment of the invention is illustrated in the accompanying drawings, wherein Figure 1 is a sectional view through a piston, showing the connection in elevation,-

Fig. 2 is a similar view but illustrating the connecting means in section,

Fig. 3 is a horizontal sectional view substantially on the line 3-3 of Fig. 1,

Fig. 4 is a bottom plan View,

Fig. 5 is a perspective view of the socket member of the coupling.

The piston head is designated generally by the reference numeral 6 and may be of any desired type, preferably in the form of a shell. Within the inner portion of this shell are formed radial webs 'Z, integral with which is a central cup 8 formlng a socket 9. Radiating from this cup are flanges 10 that overlie and are integral with the webs 7.. The flanges preferably terminate short of the cylindrical Wall of the piston head and the webs between their outer ends and said wall are preferably cut-away or reduced, as shown at 11, to eliminate weight.

The pitman or connecting rod is composed of sections 12 and 12, one having a threaded stem 12 that is screwed into a socket in the other section. A taper key 12 serves to hold the sections against relative rotation. The section 12 is provided with a terminal ball 13 that engages in the socket 9 of the cup 8. The outer portion of the ball is received in the cupped portion 14 of a retaining cap that surrounds the pitman and is provided with outstanding ears 15 The opening 16 in the cap through which the pitman 12 passes is preferably flared to permit the lateral play of said pitman, and is of sufiicient diameter to permit the cap being removed from the end of the section 12 when Specification of Letters Patent. Patent d De 20 1921 Application filed March 7, 1921.

Serial No. 450,254.

it is disconnected from the section 12". The sectionalconstruction also permits the replacement. of a ball whenever it becomes unduly Worn. Threaded into the flanges 10 are stud bolts 17 that pass through the openings in the ears 15 and have 3' am nuts 18 adjustably threaded on their outer ends. In-

terposed between the inner jam nuts and the the piston, the bearing moreover being effec-' tivelylubricated.

From the foregoing, it is thought that the construction, operation and many advantages of the herein described invention will be apparent to those skilled in the art, without further description, and itwill be understood that various changes in the size, shape, proportion and minor details of construction may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

What I claim is:

1. An engine piston provided with a socket member, a pitman having a ball that fits in the socket member, and a yielding retaining device for holding the ball in the socket member.

2. An engine piston shell provided with an internal socket section, a pitman having a ball that fits in the socket of said section, a retaining cap surrounding the pitman and fitting over the ball, and a yielding connection between the cap and piston.

3. An engine piston shell provided with internal substantially radial webs having a centrally disposed socket, a pitman having a ball engaged in the socket, a retaining cap surrounding the pitman, bolts engaged with the webs and passing through the" cap, and springs on the bolts bearing against the t. An engine piston head having a socket, a pitman having an enlargement that is engaged in the socket, a cap that surrounds the pitman and engages over the ball, and means from when the sections are detached, said for securing-the cap 100 the head, said pitman eap engaging over the ball, and yielding comprising detachable sections and said cap means fer holding the cap against said. ball. being removable from the section carrying In testimony whereof, I aifix my signa- 5 the bill when the seetifnsdafle disconneciied. ture in the presence fe'i' two witnesses.

5. 11 engine iston iea avin a soc et 1, I 1 a tapered pitma comprising deta hable sec (IEQRQTL HARTWIU tions, one of said sections having a terminal Witnesses: ball engaged in the socket, a retaining cap Mrs. GEO. HAnTwIe, 10 surrounding thersection and remevable there- Jnsse G. HILL.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2452247 *Jan 24, 1946Oct 26, 1948Larsh Everett PPiston rod connecting device
US2601998 *Mar 31, 1949Jul 1, 1952Murray Aubrey SPedestal drafting table or the like
US2755729 *Feb 18, 1953Jul 24, 1956Scottish Aluminum Ware LtdVentilation devices or louvers
US2885235 *Nov 29, 1955May 5, 1959Harry FrankelBall joint assembly
US2934366 *Mar 4, 1959Apr 26, 1960Harry FrankelPre-assembled ball and socket joint
US3583293 *Jan 10, 1969Jun 8, 1971Biasse Richard L DePiston-rod device and components thereof
US7086368Oct 28, 2004Aug 8, 2006Honda Motor Co., Ltd.Piston for an internal combustion engine
US7637396Oct 16, 2006Dec 29, 2009MeadWestvaco Clamar, Inc.Trigger sprayer piston rod with integral spring and ball and socket piston connection
US7712636Oct 18, 2006May 11, 2010Meadwestvaco Calmar, Inc.Trigger sprayer piston rod with integral spring and pivoting piston connection
EP1528245A1 *Oct 29, 2004May 4, 2005HONDA MOTOR CO., Ltd.Piston for an internal combustion engine
WO2008048804A2 *Oct 8, 2007Apr 24, 2008Continentalafa Dispensing CompTrigger sprayer piston rod with integral spring and ball and socket piston connection
U.S. Classification403/24, 403/77, 403/143, 92/239
International ClassificationF16J1/22, F16J1/10
Cooperative ClassificationF16J1/22
European ClassificationF16J1/22