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Class Information
Number: 74/40
Name: Machine element or mechanism > Mechanical movements > Rotary to or from reciprocating or oscillating > Crank, pitman, lever, and slide
Description: Mechanisms, including a crank, pitman, lever, and slide.

Sub-classes under this class:

Class Number Class Name Patents
74/41 Pump jack type 75

Patents under this class:

Patent Number Title Of Patent Date Issued
8671895 Variable compression ratio apparatus with reciprocating piston mechanism with extended piston offset Mar. 18, 2014
7373915 Motion control mechanism for a piston engine May. 20, 2008
7077023 Toroidal continuously variable transmission Jul. 18, 2006
6904888 Reciprocating piston device Jun. 14, 2005
6622582 Assembly for limiting axial motion of shaft in an imaging apparatus Sep. 23, 2003
6439071 Transmission mechanism for transforming a continuous rotating motion into intermittent rotating motion and a device for transporting sheets of laminar material which is provided with such a de Aug. 27, 2002
6371008 Water-raising pump Apr. 16, 2002
6334423 Reciprocating piston engine and its link mechanism Jan. 1, 2002
6055903 Press, specifically punch press May. 2, 2000
5860318 Stroke adjustment device for pickling machines Jan. 19, 1999
5762480 Reciprocating machine Jun. 9, 1998
5328443 Massage apparatus Jul. 12, 1994
5317934 Variable speed linear actuator Jun. 7, 1994
5287728 Power transmission device for press machine Feb. 22, 1994
5279235 Valve actuation mechanism for incinerator Jan. 18, 1994
5182505 Aircraft control surface position transducer Jan. 26, 1993
5167358 Material loading apparatus for material working machines Dec. 1, 1992
5065636 Drive arrangement for a male-die-side ejector slidably disposed in a slide of a mechanical metal-forming press Nov. 19, 1991
5063807 Saw such as a jig saw or scroll saw Nov. 12, 1991
5054330 Motion transfer mechanism with a linkage Oct. 8, 1991
5031265 Wiper device for wiping a vehicle windshield Jul. 16, 1991
4979428 Reciprocating air compressor with improved drive linkage Dec. 25, 1990
4970861 Geared rotary-to-linear motion converting system for bidirectional pump drive Nov. 20, 1990
4848171 Rocker arm drive for electrical appliances Jul. 18, 1989
4787114 Wiper driving system for vehicle Nov. 29, 1988
4596160 Mechanism for transferring movements between first and second linearly displaceable bodies Jun. 24, 1986
4572166 Self-travelling vibration generator Feb. 25, 1986
4546663 Drive linkage for Stirling cycle and other machines Oct. 15, 1985
4527769 Apparatus for moving a controlled member to a predetermined position Jul. 9, 1985
4520682 Reciprocating rectilinear motion apparatus Jun. 4, 1985
4483126 Adjustable drive mechanism Nov. 20, 1984
4483208 Pumping unit Nov. 20, 1984
4416198 Drive for producing motion with dwells Nov. 22, 1983
4367658 Oscillating member for transforming a rotary motion into a reciprocating motion Jan. 11, 1983
4353422 Hand held power machine with oscillating tool Oct. 12, 1982
4347961 Rapid advance long dwell feed mechanism for multiple slide machines Sep. 7, 1982
4276823 Eccentric press Jul. 7, 1981
4207774 Drive mechanism for piston engines Jun. 17, 1980
4184383 Dual stroke drive mechanism for pumps Jan. 22, 1980
4173903 Crank drive for a photographic camera Nov. 13, 1979
4138904 Link drive mechanism for mechanical presses Feb. 13, 1979
4092871 Precision drive mechanism for converting fixed reciprocating motion to adjustable reciprocating motion Jun. 6, 1978
3964524 Loom lay drive linkage Jun. 22, 1976
3964523 Shuttle drive linkage for looms Jun. 22, 1976
3956942 Mechanism producing a linear reciprocating output motion with a low speed interval near the center of the stroke May. 18, 1976
3941240 Apparatus for operating automatic conveyors Mar. 2, 1976

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