Other

Duval Corporation

David H. Vroom

David H Vroom

Shaft and gear housing

Rack-and-pinion sliding support mechanisms and mechanical elements thereof. One or more shafts are coupled to pinions configured to engage with one or more racks and configured to be driven by one or more motors. The rack and pinion are configured to provide vertical and horizontal displacement to reduce premature component wear leading to poor gear mesh caused to by forces on the mechanism during use. Motor assembly in such support mechanism is modified&#x2014;as compared to current industrial versions&#x2014;to prevent the destruction of motor-assembly housing by torques generated by the one or more motors and transferred to the pinions, thereby reducing motor failures.

Sliding support mechanism

Preventing torque-caused impair of a sliding support mechanism

Rack-and-pinion sliding support mechanisms and mechanical elements thereof are disclosed. One or more shafts are coupled to pinions configured to engage with one or more racks and configured to be driven by one or more motors. The rack and pinion are configured to provide vertical and horizontal displacement to reduce premature component wear leading to poor gear mesh caused to by forces on the mechanism during use. Motor assembly in such support mechanism is modified&#x2014;as compared to current industrial versions&#x2014;to prevent the destruction of motor&#x2014;assembly housing by torques generated by the one or more motors and transferred to the pinions, thereby reducing motor failures.

Rack-and-pinion sliding support mechanisms are disclosed. One or more shafts are coupled to pinions configured to engage with one or more racks and configured to be driven by one or more motors. The rack and pinion are configured to provide vertical and horizontal displacement to reduce premature component wear leading to poor gear mesh caused to by forces on the mechanism during use.

Sliding support mechanism with improved reliability and serviceability

Motorized rack-and-pinion sliding support mechanisms are disclosed. One or more shafts are coupled to pinions configured to engage with one or more racks and configured to be driven by one or more motors. The shaft(s) are configured to be manually disengageable from the motor(s), allowing the mechanism to slide freely in the event of a motor failure. The mechanism is further configured to reduce premature component wear leading to poor gear mesh caused to by forces on the mechanism during use.

A reversible ratchet mechanism includes a pair of roller clutches set to operate in opposite directions when engaged by a belt. During the forward motion of the ratchet assembly in either direction of propulsion of the belt, one roller clutch is disengaged while the other is engaged and locked, thereby propelling the belt. During the backward stroke, the engaged roller clutch is free to rotate. The result is that the reciprocating motion of the assembly is converted into the linear motion of the belt. The ratchet assembly includes a shift mechanism to reverse the engagement of the roller clutches and change the direction of propulsion of the belt produced by the push/pull action of the operator. The invention is advantageously used in conjunction with a wheelchair.

Reversible ratchet mechanism

A pressure relief system for a gyratory crusher is disclosed in which two separate but interacting fluid assemblies function, respectively, to adjust the operating position of the crusher cone of the gyratory crusher and to control the pressure above which the pressure relief system is activated. The system operates to relieve excessive pressure caused by the introduction of uncrushable foreign matter into the crushing chamber and to facilitate the elimination of such matter from the crusher.

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Tucson, AZ, United States of America

David H Vroom