公开(公告)号：WO1989007213A1

公开(公告)日：1989-08-10

申请号：PCT/US1988000355

申请日：1988-02-01

Applicant: WHITEMAN, Marvin, E., Jr.

IPC: F16H19/04

CPC classification number: F16H19/04 ,  G05G7/02 ,  G05G11/00 ,  Y10T74/18128 ,  Y10T74/18808 ,  Y10T74/18976 ,  Y10T74/1967

Abstract: The invention relates to an apparatus for converting a unidirectional displacement to an angular displacement of selectable direction. The apparatus (10) has a rack gear assembly, which has two opposing rack gears (16 and 17) held in a parallel spaced relationship and constituting a coordinate plane. Disposed within the two opposing rack gears is rotational shaft (15) having attached to it engagement pin (21) for engaging a segmental pinion gear slot (22 or 23). A pair of opposing segmental pinion gears (13 and 14) are rotatably attached to shaft (15). Each segmental pinion gear (13 and 14) is engaged with a corresponding rack gear (16 and 17). The invention also provides a means for engaging the first said engagement means with either one of the two segmental pinion gears.

公开(公告)号：WO1991006790A1

公开(公告)日：1991-05-16

申请号：PCT/US1989005721

申请日：1989-12-27

Applicant: WHITEMAN, Marvin, E., Jr.

IPC: F16H59/38

CPC classification number: F16H55/563

Abstract: An automatic variable speed centrifugal clutch (2) with belt tightening assembly is characterized by even transmission of rotational drive to a pair of belts and includes a rotating spindle (4) and clutch plate (10) having an adjustable centrifugally operable belt tightening mechanism. The belt tightening mechanism includes a clutch drum (20) and a spacer (30) which define recesses for receiving the belts to be driven. Slide rails (18) are slidably inserted through slide rail holes (26) in the clutch drum and (36) in the spacer, and are connected at their ends to the clutch plate (10) and spindle flange (4b) rotationally interlock the clutch assembly yet allow for longitudinal displacement of the clutch drum (20) and spacer means (30) relative to the spindle flange (4b). As the spindle (4) rotates, clutch drum (20) presses spacer (30) against flange (46) of spindle (4) to evenly drive the belts while compensating for differences in belt size.

Abstract translation: 具有皮带紧固组件的自动变速离心式离合器（2）的特征在于将旋转驱动传递到一对皮带，并且包括具有可调离心操作皮带紧固机构的旋转心轴（4）和离合器片（10）。 带束紧机构包括离合器鼓（20）和间隔件（30），其限定用于接收待驱动皮带的凹部。 滑轨（18）通过离合器鼓中的滑轨孔（26）和（36）可滑动地插入到间隔件中，并且在它们的端部连接到离合器板（10），并且主轴凸缘（4b）将离合器 组件还允许离合器鼓（20）和间隔件装置（30）相对于主轴凸缘（4b）的纵向位移。 当主轴（4）旋转时，离合器鼓（20）将间隔件（30）压靠在主轴（4）的凸缘（46）上，以均匀地驱动皮带，同时补偿皮带尺寸的差异。

公开(公告)号：WO1990009875A1

公开(公告)日：1990-09-07

申请号：PCT/US1989003949

申请日：1989-09-11

Applicant: WHITEMAN, Marvin, E., Jr.

IPC: B28C05/08

CPC classification number: B28C5/0862

Abstract: A horizontally oriented mortar mixing drum (11) fabricated of polyethylene material having an elemental cylindrical segment opening through which mortar materials to be mixed may be deposited into or poured from. A perimeter frame having base elemental frame member (15), diametric wall frame members (16) and polyethylene grate (20) is provided for enhancing resistance to torsional stress on drum (11). Wear resistant liner (12) and side panels (13) and (14) cover the interior surface of drum (11). Paddle shaft (18) is rotatably and axially supported within drum (11) and has paddle stubs (28) attached to and extending radially therefrom. Polyethylene mixing paddles (19) are sleeved onto paddle stubs (28) to complete improved mortar mixing drum assembly (10).

公开(公告)号：WO1987000221A1

公开(公告)日：1987-01-15

申请号：PCT/US1986001404

申请日：1986-06-30

Applicant: WHITEMAN, Marvin, E., Jr.

IPC: E01C19/22

CPC classification number: E04F21/248 ,  Y10T74/18752 ,  Y10T74/20207 ,  Y10T74/20396 ,  Y10T74/2158

Abstract: A concrete finishing machine having a rotatable trowel blade assembly (11) and a mechanism (27, 29, 33) for controllably adjusting the pitch of the trowel blades (15) relative to a wet concrete surface (19) on which the blades rest. Manual pivoting of a control lever (25) controllably adjusts the trowel blade pitch and, in doing so, automatically increases or decreases the amount of blade surface contacting the concrete surface (19), and correspondingly lowers or raises the machine relative to the surface (19). The contacting blade surface supports the machine's entire weight. A special counterbalancing apparatus that includes, for example, a compressed coil spring (51), biases the control lever (25) so as to compensate for the machine's weight and permits an operator to adjust the blade pitch with substantially less force than otherwise would be required.