Patents by Inventor Daniel W. Schaefer
Daniel W. Schaefer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 5803474Abstract: A rear suspension device for a ride-on mower includes a pivoting assembly coupled to the frame of the ride-on mower by a torsion bar which has a transversely extending back portion that can be trapped between projections on the rear portion of the frame of the mower and a front surface of the pivoting assembly. Portions of the torsion bar extend substantially parallel to a longitudinal axis of the ride-on mower and have ends that extend through apertures in torsion bar brackets that are coupled to the pivoting assembly. The suspension device is capable of transferring weight from one portion of the ride-on mower to another portion of the ride-on mower, thereby enhancing stability.Type: GrantFiled: July 26, 1996Date of Patent: September 8, 1998Assignee: Simplicity Manufacturing, Inc.Inventors: Kenneth H. Klas, Michael P. Schemelin, Daniel W. Schaefer
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Patent number: 5570570Abstract: A steering and suspension system for a ride-on mower. A wheel is connected to a spindle and rotates about a first axis of rotation. The spindle is coupled to a frame and rotates about a second axis of rotation that is inclined from vertical backward substantially along a longitudinal axis of the ride-on mower. A level adjusting device is coupled to a steering component of the ride-on mower and is also coupled to a lawn mower accessory. The level adjusting device offsets vertical displacements caused by the inclined spindles, thereby allowing the accessory to stay level when turning the ride-on mower.Type: GrantFiled: June 7, 1995Date of Patent: November 5, 1996Assignee: Simplicity Manufacturing, Inc.Inventors: Kenneth H. Klas, Edward Freier, Jr., Michael P. Schemelin, Daniel W. Schaefer, Gary A. Hays
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Patent number: 5474315Abstract: A rear suspension device for a ride-on mower that includes a pivoting assembly coupled to the ride-on mower. The pivoting assembly is coupled to a torsion bar and the torsion bar is coupled to a rear portion of the ride-on mower. The coupling to the rear portion is accomplished by insertion of a portion of the torsion bar that is substantially parallel to a longitudinal axis of the ride-on mower into an aperture coupled to the rear portion. The device is callable of transferring weight from one portion of the: ride-on mower to another portion of the ride-on mower, thereby enhancing stability.Type: GrantFiled: July 16, 1993Date of Patent: December 12, 1995Assignee: Simplicity ManufacturingInventors: Kenneth H. Klas, Edward Freier, Jr., Michael P. Schemelin, Daniel W. Schaefer, Gary A. Hays
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Patent number: 5094326Abstract: A control linkage for controlling the speed and direction of a hydrostatic transmission in a lawn and garden tractor. A directional control arm, coupled to a dash mounted direction and speed control lever, pivots relative to the hydrostatic transmission in response to movement of the direction and speed control lever. A cam roller on the directional control arm engages a cam plate mounted on the control input shaft of the hydrostatic transmission so as to rotate the control input shaft in response to movement of the direction and speed control lever. A detent adjacent the transmission and engaging the cam plate fixes the position of the cam plate to eliminate backlash and avoid vehicle "creep" when the direction and speed control lever is placed in "neutral." An additional cam, responsive to engagement of a vehicle clutch/brake system automatically places the transmission in "neutral" when the clutch/brake system is engaged.Type: GrantFiled: September 24, 1990Date of Patent: March 10, 1992Assignee: Simplicity Manufacturing, Inc.Inventors: Michael P. Schemelin, Kenneth H. Klas, Daniel W. Schaefer
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Patent number: 4711073Abstract: An impeller is mounted above the top wall of the housing of a mower carried by a riding vehicle, near the side of the mower at which it has its clipping outlet. The rotor of the impeller rotates on a vertical axis that is between the clipping outlet and the vertical axis of the mower blade nearest that outlet and is driven by a belt engaging a pulley on the spindle for that blade. Flat paddle-like blades of the rotor have a portion of their orbit in an upwardly and rearwardly extending passage defined by the front portion of a clipping duct that communicates the mower clipping outlet with a receptacle at the rear of the vehicle. The impeller draws air and clippings out of the mower housing and propels them rearward through the duct.Type: GrantFiled: June 30, 1986Date of Patent: December 8, 1987Assignee: Simplicity Manufacturing, Inc.Inventors: Edward Freier, Jr., Daniel W. Schaefer
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Patent number: 4433530Abstract: A walk-behind vehicle in the form of a mower (11) is provided with an interlock mechanism (31, 68, 61 or 131, 158, 161) which prevents operation of a pull cable (51 or 151) to start an engine (21) when the mower power drive (22) is in a drive establishing condition.Type: GrantFiled: September 23, 1982Date of Patent: February 28, 1984Assignee: Simplicity Manufacturing, Inc.Inventor: Daniel W. Schaefer
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Patent number: 4433868Abstract: A protective cab (31) for the operator of a walk-behind tractor such as a snowthrower (11) is enclosed on its front and lateral sides by large window panels (51, 52, 53) of transparent plastic material extending between a top (32) and a bottom shroud (101). A pair of frames (56, 57) interconnect the top (32), the panels (51, 52, 53) and the shroud (101) and together with a pair of braces (121, 122) connect the cab to the handlebars (17, 18) and handlebar support (16). A transverse trough (34) minimizes flow of water over the rear edge of the roof (32) thus enhancing the comfort of the operator. The shroud (101) protects the operator against upwardly swirling winds and provides pocket means useful for temporarily storing personal items.Type: GrantFiled: December 31, 1981Date of Patent: February 28, 1984Assignee: Simplicity Manufacturing, Inc.Inventors: Lynn E. Hochwitz, Daniel W. Schaefer, Michael L. Dawson
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Patent number: 4396081Abstract: The proper drive establishing force is indicated by the relative position of the end (91) of a control link (36) and the end (92) of a spring coil (49) of a coil spring (47) by which resilient clutch engaging force is transmitted to a transmission clutching mechanism (65,66) by a hand lever (26).Type: GrantFiled: December 14, 1981Date of Patent: August 2, 1983Assignee: Simplicity Manufacturing, Inc.Inventors: Lynn E. Hochwitz, Daniel W. Schaefer
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Patent number: 4132280Abstract: A reversibly mountable clutch control handle for a walk-behind lawn mower which may be pivotally mounted on the collapsible handle of the lawn mower in either one of two alternative mounting positions, whichever best suits the convenience and comfort of the operator, and in which the mower handle, the clutch control handle, and the control linkage associated with the clutch control handle are all collapsible to a folded position for storage or shipment in either of the mounting positions of the clutch control handle. The mower handle includes two laterally spaced legs lying in a common plane and connected at their upper end by a cross bar.Type: GrantFiled: August 5, 1977Date of Patent: January 2, 1979Assignee: Allis-Chalmers CorporationInventors: Kenneth R. Jones, Daniel W. Schaefer
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Patent number: 4103478Abstract: A support for a rear mounted flexible grass catcher container is mounted directly to the mower body and is free to pivot back for clearing the container from the mower shroud, when necessary for service purposes, without disconnecting the support from the mower. The support pivot is disposed in a manner that the applied load from the grass catcher container causes a resulting moment which tends to hold the container rear support in operative position without the necessity of providing clamps or catches. In addition, the rear support serves as a barrier for the container preventing its engagement with the adjacent rear wheels of the mower.Type: GrantFiled: March 3, 1977Date of Patent: August 1, 1978Assignee: Allis-Chalmers CorporationInventor: Daniel W. Schaefer
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Patent number: 4068452Abstract: A braking arrangement for use with rotary mowers of the type comprising a pair of spaced apart arbors, each supporting for rotation a spindle having a mower blade mounted on the lower end thereof. A driven pulley is secured to the upper end of each spindle. The two driven pulleys are driven by a common drive belt. An idle pulley is movable either into tensioning or nontensioning relation to the drive belt to cause said belt to be in either driving or nondriving relation to the driven pulleys. To prevent coasting of the two mower blades and of the drive belt upon movement of the idler pulley to a nontensioning position, a rod-like pivoted brake member is provided which has a common braking cooperation with both driven pulleys. A biasing spring constantly urges the brake member toward braking position.Type: GrantFiled: March 11, 1976Date of Patent: January 17, 1978Assignee: Allis-Chalmers CorporationInventors: Daniel W. Schaefer, Kenneth H. Klas