Adjustable shaft actuator
Patent 5054372 Issued on October 8, 1991. Estimated Expiration Date: 
February 13, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
February 13, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesDevice for variable height adjustment of supports Adjustable rotary actuator Rotary actuator with backlash elmination Rotary actuator with backlash elimination Actuator for actuating valves Patent #: 4949936 InventorApplicationNo. 654768 filed on 02/13/1991US Classes:92/13.5, Independent adjustment of opposite stroke limits of single reciprocating working member74/89, Reciprocating or oscillating to or from alternating rotary92/13.6, Adjustable abutment positioned within working chamber92/32, Working fluid-actuated interengaging means permits unidirectional rotation of element relative to fixed part92/33Element extends through working member portionExaminersPrimary: Look, Edward K.Assistant: Denion, Thomas Attorney, Agent or FirmInternational ClassesF01B 031/14F15B 015/24 AbstractA fluid-powered rotary actuator having a body with first and second ends, and a shaft extending generally coaxially within the body. The shaft is supported for rotational movement relative to the body by bearing races formed on the shaft first and second end portions and corresponding bearing races formed on a pair of first and second end caps. First and second stop rings are disposed within the body, each adjacent to a corresponding end cap, with the shaft extending therethrough. The stop rings are each freely and longitudinally movable on the shaft within a limited axial range. The stop rings are positioned using set screws which extend through the end caps and engage the stop rings at selected longitudinal positions within their limited axial ranges. When the first and second stop rings are positioned, they engage and limit axial travel of the piston sleeve toward the end caps, and hence provide preselected and adjustable and rotational limits for the rotational travel of the shaft.Field of SearchWITH ADJUSTABLE MEANS TO VARY STROKE OF WORKING MEMBERIndependent adjustment of opposite stroke limits of single reciprocating working member Adjustable abutment positioned within working chamber RECTILINEARLY MOVING WORKING MEMBER AND COAXIAL OR PARALLEL ELEMENT SLIDABLY INTERENGAGED FOR RELATIVE ROTARY MOVEMENT Working fluid-actuated interengaging means permits unidirectional rotation of element relative to fixed part Element extends through working member portion Backlash take-up Reciprocating or oscillating to or from alternating rotary | |
