Methods and apparatus to assemble actuators are described. An example method includes positioning a biasing element in a cavity defined by a housing of an actuator such that the biasing element is in an uncompressed state and at least a portion of the biasing element is to extend outside of the cavi
Methods and apparatus to assemble actuators are described. An example method includes positioning a biasing element in a cavity defined by a housing of an actuator such that the biasing element is in an uncompressed state and at least a portion of the biasing element is to extend outside of the cavity beyond an end defined by the housing; compressing the biasing element to a compressed state until the portion of the biasing element extending outside of the cavity is positioned inside the cavity; coupling a cover to the end of the housing to capture the biasing element in the cavity; and maintaining the biasing element in the compressed state during the coupling such that the biasing element does not engage the cover.
대표청구항▼
1. An apparatus comprising: a housing defining a cavity having a first dimensional length;a spring positioned in the cavity of the housing in a relaxed state, the spring in the relaxed state having a second dimensional length that is greater than the first dimensional length of the cavity such that
1. An apparatus comprising: a housing defining a cavity having a first dimensional length;a spring positioned in the cavity of the housing in a relaxed state, the spring in the relaxed state having a second dimensional length that is greater than the first dimensional length of the cavity such that at least a portion of the spring extends from the housing;a compression assembly disposed in the cavity and coupled to the spring, the compression assembly to compress the spring to a first compressed state and a second compressed state different than the first compressed state, the spring in the first compressed state having a third dimensional length that is less than the first dimensional length of the cavity; anda cover to be coupled to the housing to enclose the cavity, the cover being coupled to the housing after the spring is positioned in the first compressed state via the compression assembly, at least a portion of the compression assembly being accessible via an aperture formed in the cover when the cover is coupled to the housing to enable movement of the spring between the first compressed state and the second compressed state. 2. The apparatus of claim 1, wherein the spring is spaced apart from the cover when the cover is attached to the housing and the spring is in the first compressed state to prevent galling when the cover is coupled to the housing. 3. The apparatus of claim 1, wherein a first end of the spring is to engage the compression assembly and a second end of the spring is to engage a loading member. 4. The apparatus of claim 3, wherein the compression assembly comprises a fastener threadably coupled to a stem of the loading member, the fastener to rotate relative to the stem in a first direction about a longitudinal axis of the fastener to cause the spring to move toward at least one of the first compressed state or the second compressed state and the fastener to rotate relative to the stem in a second direction opposite the first direction about the longitudinal axis to cause the spring to move toward the relaxed state. 5. The apparatus of claim 4, wherein the compression assembly further comprises a plate positioned between a head of the fastener and the first end of the spring, the plate to evenly distribute a load to the first end of the spring when the fastener rotates relative to the longitudinal axis. 6. An apparatus comprising: means for actuating positioned in a cavity defined by a housing;means for biasing positioned in the cavity in an uncompressed state, the means for biasing is to at least partially extend outside of the cavity when the means for biasing is in the uncompressed state;means for compressing the means for biasing, the means for compressing to position the means for biasing to a first compressed state such that the means for biasing is positioned inside the cavity and away from an edge of the housing; andmeans for covering the cavity, wherein the means for covering the cavity is to be coupled to the edge of the housing after the means for biasing is positioned in the first compressed state such that the means for biasing does not engage or impart a force to the means for covering when the means for covering is coupled to the housing, and the means for covering having means for enabling access to the means for compressing when the means for covering is attached to the means for housing to enable adjustment of the means for biasing to a second compressed state different than the first compressed state when the means for covering is attached to the means for housing. 7. The apparatus of claim 6, wherein the means for compressing threadably engages the means for actuating. 8. The apparatus of claim 6, wherein the means for compressing comprises means for driving the means for biasing to the first compressed state and selectively maintaining the means for biasing in the first compressed state when the means for covering is coupled or decoupled from the housing. 9. An apparatus comprising: a loading member positionable in a cavity of a housing to define a first chamber and a second chamber, the housing having a removable cover, the cover to enclose the cavity when the cover is attached to the housing;a biasing element positionable in the first chamber of the cavity, the biasing element having a first end and a second end, the loading member to couple to the first end of the biasing element, the biasing element has a first dimensional length that is greater than a longitudinal length of the cavity when the biasing element is in the uncompressed state, the biasing element has a first compressed state and a second compressed state, the first compressed state being different than the second compressed state: anda compression assembly to couple to the second end of the biasing element, the compression assembly having a plate and a fastener, the compression assembly to move the biasing element from the uncompressed state to the first compressed state in the first chamber prior to attachment of the cover to the housing to enable the cover to attach to the housing free from a force imparted to the cover by the biasing element, and the compression assembly being accessible via the cover when the cover is attached to the housing to move the biasing element from the first compressed state to the second compressed state. 10. The apparatus of claim 9, wherein the cover includes an aperture to facilitate access to the compression assembly when the cover is coupled to the housing. 11. The apparatus of claim 10, further comprising a cap coupled to the cover, the cap to prevent contaminates from entering the aperture. 12. The apparatus of claim 9, wherein the fastener comprises a head and a threaded portion, the threaded portion to pass through a hole in the plate, the plate positionable between the second end of the spring and the head. 13. The apparatus of claim 9, wherein the fastener is to threadably couple to an internal opening of a stem of the loading member. 14. The apparatus of claim 9, wherein the second end of the biasing element is separated from the cover while the cover is attached to the housing. 15. The apparatus of claim 9, wherein the first chamber is adjacent a first side of the loading member and the second chamber is adjacent a second side of the loading member. 16. The apparatus of claim 15, further comprising a flow control member having a stem coupled to the second side of the loading member. 17. The apparatus of claim 16, further comprising a base to be coupled to the housing adjacent the second chamber, the base having an opening to receive the flow control member. 18. The apparatus of claim 9, wherein the biasing element has a second dimensional length that is less than the longitudinal length of the cavity and the first dimensional length when the biasing element is in the first compressed state. 19. The apparatus of claim 10, wherein the fastener is to at least partially pass through the aperture of the cover. 20. The apparatus of claim 9, wherein the compression assembly is to enable the biasing element to move from the first compressed state to an uncompressed state after the cover is removed from the housing.
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