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COMPACT MECHANISM FOR CREATING
SIMULTANEOUS ROTARY AND LINEAR MOTION
United States Patent [19]
Ruland
[11] Patent Number: 596499451
[45] Date of Patent: Jul. 22, 1997
[76] Inventor: Frederick W. Ruland. 929 Massachusetts Ave.. Cambridge. Mass. 02139
[21] Appl. No.: 269,160
[22] Filed: June 30, 1994
[51] Int. Cl.6
..............................................F16H 1/08
[52] U.S. Cl............................74/424.8 B; 74/424.8 R
[58] Field of Search ....................74/424.8 B 424.8 R
310/80
[56]
Referenm Cited
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2.023,841 1211935 Kingsbury.
2,476,594 7/1949 Caark ................................ 741424.8 B
2,860,266 11/1958 Schrader .
3,407,680 10/1968 Wesanoreland
3,872,738 3/1975 Price et al ........................... 74/424.8 B
4.123,192 10/1978 Ruland .
4.494,025 1/1985 Ficlder .
4.872,362 10/1989 Kemper et al.
4,926,709 5/1990 Gardner ............................... 74/424.8 B
4,939,946 7/1990 Teramachi .............................. 74/89.15
5,127,281 7/1992 Yanawgisawa ........................... 74/89.15
5.203,222 4/1993 Hirai .
5,327,795 7/1994 Katabira ............................... 74/424.8 B
FOREIGN PATENT DOCLTNIENTS
PCY/CH85/
00112 7/1985 YOPO ............................... 741424.8 B
Primary Ezaminer-Rodney H. Bonel-
Assistant Exapniner-David Fenstennacher
Attorney, Agent, or Firm--Lappin & Kusmer LLP
[57] ABSTRACT
A compact mechanism for producing simultaneous rotary and linear motion for a machine tool includes a drive shaft having a spline race and helical race coextensive over at least a portion of its length. The compact mechanism includes a first motor coupled to a screwy, engaginz the helical race for imparting linear motion on the drive shaft. The compact mechanism also includes a second motor coupled to a spline engaging the spline race for imparting rotary motion on the drive shaft- By operating the motors simultaneously but independently, a wide range of linear movement is obtained.
I8 Claims, 6 Drawing Sheets
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