, an OC outer radial surface 96, an OC first axial end 98, an OC second axial end 100, an OC first axial end wall 102, a release spring flange 104, a plurality lock ball apertures 106, and a pin guide slot 108. The OC inner cavity 92 is defined by the OC inner radial surface 94. The OC outer radial surface 96 is opposite the OC inner radial surface 94. The OC first axial end wall 102 is disposed at the first axial end 98 and includes an OC first axial end wall bore 110 configured to receive a portion of the lock sleeve 44. In some embodiments, the outer cylinder 42 may include a circumferentially extending LS retainer bore 112 disposed inwardly at the edge of the OC first axial end wall bore 110. The LS retainer bore 112 is configured to receive a lock sleeve retainer as will be detailed herein. In some embodiments, the outer cylinder 42 may include an OC retainer 114 engaged with the OC outer radial surface 96 proximate the first axial end 98 of the outer cylinder 42. The OC retainer 114 is configured for engagement with the OC retainer bore disposed in the control sleeve 46 as will be described herein. The release spring flange 104 extends outwardly from the OC outer radial surface 96. The lock ball apertures 106 are aligned with one another at an axial position, are disposed around the circumference of the outer cylinder 42, and each is configured to permit a lock ball 51 to travel radially therethrough.

Referring to FIGS. 7-9, the pin guide slot 108 is configured to have a first axial end 108A, a second axial end 108B, an axially extending guide portion 108C, a ramp portion 108D, and an intermediate position 108E. The first and second axial ends 108A, 108B are axially separated from one another by a distance “A1”. The first and second axial ends 108A, 108B are circumferentially spaced apart from one another by a distance “C1”. The intermediate position 108E is disposed at the interface between the axially extending guide portion 108C and the ramp portion 108D. The axially extending guide portion 108C extends from the second axial end 108B to the intermediate position 108E. The axially extending guide portion 108C has a width “W” that is sized to form a slide fit with a pin 146 attached to the control sleeve 46 as will be detailed herein. The ramp portion 108D is defined by a guide ramp surface 108F, a side surface 108G, and a base surface 108H. Collectively, the guide ramp surface 108F, side surface 108G, and base surface 108H form a generally triangular aperture in the outer cylinder 42. The guide ramp surface 108F intersects with the axially extending guide portion 108C at the intermediate position 108E and extends to the first axial end 108A. The guide ramp surface 108F extends both axially and circumferentially and may be described as extending at an angle beta (ß) relative to the axial centerline of the HOR 36. The side surface 108G is disposed opposite the guide ramp surface 108F, and extends from the first axial end 108A to the base surface 108H in a direction that is parallel to the axial centerline of the HOR 36. The base surface 108H, which is disposed proximate to the intermediate position 108E, extends circumferentially from the side surface 108G to the axially extending guide portion 108C. As will be detailed herein, the pin guide slot 108 is configured to require movement in two directions (axial and rotational) to permit the HOR 36 to transition from an unlocked configuration to a locked configuration and vice versa. The above described pin guide slot 108 configuration is an example of a configuration that requires movement in two directions (axial and rotational) to permit the HOR 36 to transition from an unlocked configuration to a locked configuration and vice versa. The present disclosure is not limited to this specific pin guide slot 108 configuration. For example, alternative pin guide slot 108 configurations may be used to satisfy a different unlock sequence.

Referring to FIGS. 4 and 10, the lock sleeve 44 (LS) has a LS first axial end 116, a LS second axial end 118, a first LS outer radial surface 120, a second LS outer radial surface 122, a third LS outer radial surface 124, a first LS shoulder surface 126, a second LS shoulder surface 128, an LS bore 130 defined by an inner LS radial surface 132, and an LS retainer 134. The first LS outer radial surface 120 extends axially from the second axial end 118 to the second LS outer radial surface 122, the second LS outer radial surface 122 extends axially from the first LS outer radial surface 120 to the third LS outer radial surface 124, and the third LS outer radial surface 124 extends axially from the second first LS outer radial surface 122 to the first axial end 116. The first LS shoulder surface 126 extends between the first LS outer radial surface 120 and the second LS outer radial surface 122 and the second LS shoulder surface 128 extends between the second LS outer radial surface 122 and the third LS outer radial surface 124. The first LS outer radial surface 120 is configured to create a slide fit with the OC inner radial surface 94. The third LS outer radial surface 124 is configured to create a slide fit with the OC first axial end wall bore 110. The inner LS radial surface 132 is configured to create a slide fit with the PSS outer radial surface 70. The LS retainer 134 is engaged with the third LS outer radial surface 124 and is disposed to limit the travel of the lock sleeve 44 as will be detailed herein.

The control sleeve 46 (CS) includes a CS first axial end 136, a CS second axial end 138, a CS outer radial surface 140, a first CS cavity section 142, a second CS cavity section 144, a pin 146, and a CS channel 148 that extends circumferentially around the control sleeve 46. The first and second axial ends 136, 138 are opposite one another. The first CS cavity section 142 has a diameter D6 and is defined by a first CS inner radial surface 150. The second CS cavity section 144 has a diameter D7 and is defined by a second CS inner radial surface 152. The first CS cavity section diameter D6 is greater than the second CS cavity section diameter D7 (D6>D7). The first CS cavity section 142 extends from the CS second axial end 138 to the second CS cavity section 144 and the second CS cavity section 144 extends from the first axial end 136 to the first CS cavity section 142. A CS shoulder surface 154 extends radially between the first CS inner radial surface 150 and the second CS inner radial surface 152. The pin 146 extends into the second CS cavity section 144 a distance (“PD”) beyond the second CS inner radial surface 152 for engagement with the pin guide slot 108 as will be detailed herein. The CS channel 148 has a depth 148A, a width 148B, and a base surface 148C disposed between a pair of ramp surfaces 148D. In some embodiments, the control sleeve 46 may include a circumferentially extending OC retainer bore 156 disposed at the CS first axial end 136, extending inwardly at the intersection of the second CS inner radial surface 152 and the first axial end 136.

Referring to FIGS. 4 and 12, the lock spring 48 is disposed in an annular region between the lock sleeve 44 and the outer cylinder 42. Depending on the configuration of the HOR 36, a portion of the lock spring 48 may be disposed radially between the second LS outer radial surface 122 and the OC inner radial surface 94, and a portion radially between the third LS outer radial surface 124 and the OC inner radial surface 94 (e.g., in a HOR 36 unlocked configuration—see FIGS. 12 and 13), or the entire lock spring 48 may be disposed between the second LS outer radial surface 122 and the OC inner radial surface 94 (e.g., in a HOR 36 locked configuration—see FIG. 14). The lock spring 48 may be disposed axially between the first LS shoulder surface 126 and the inner surface of the OC first axial end wall 102. In the FIGURES, the lock spring 48 is shown as a helical spring and is configured to resist axial movement of the lock sleeve 44 toward the first axial end 54 of the HOR 36 and to bias the lock sleeve 44 in the opposite direction toward the second axial end 56 of the HOR 36. The present disclosure is not limited to any particular lock spring 48 configuration. In FIGS. 4 and 12 wherein the HOR 36 is in an unlocked configuration, the lock spring 48 is in a substantially uncompressed state. In FIG. 15 wherein the HOR 36 is in a locked configuration and in FIG. 16 wherein the HOR 36 is in a locked and loaded configuration, the lock spring 48 is in a compressed state.

The release spring 50 is disposed in an annular region radially between the OC outer radial surface 96 and the first CS inner radial surface 150. The release spring 50 is disposed axially between the CS shoulder surface 154 and the release spring flange 104. In the FIGURES, the release spring 50 is shown as a helical spring and is configured to bias the control sleeve 46 toward the first axial end 54 of the HOR 36 and to resist movement of the control sleeve 46 in the opposite direction. The present disclosure is not limited to any particular release spring 50 configuration. In FIGS. 4 and 12 wherein the HOR 36 is in an unlocked configuration, the release spring 50 is in a compressed state. When the HOR 36 is in a locked configuration, the release spring 50 is in an uncompressed state.

FIGS. 4 and 12 illustrate a present disclosure HOR 36 embodiment disposed in an “unlocked” configuration. FIG. 3 illustrates a fan cowl member 28A disposed in a stowed condition. When the fan cowl member 28A is in a stowed condition, the HOR 36 is in an unlocked configuration. In the unlocked configuration, the piston head 40 is mounted within the OC inner cavity 92 proximate the second axial end 56 of the HOR 36, and the lock sleeve 44 is mounted within the OC inner cavity 92 proximate the first axial end 54 of the HOR 36. In this position, the lock sleeve 44 is prevented from traveling axially toward the second axial end 56 by the LS retainer 134 that is at least partially received within the LS retainer bore 112 (see FIG. 7) disposed in the OC first axial end wall 102. In the unlocked configuration, the control sleeve 46 is prevented from traveling axially by the lock balls 51 disposed partially in the lock ball apertures 106 disposed in the outer cylinder 42 and partially into the CS channel 148. In the HOR 36 embodiment shown in the FIGURES, the CS channel 148 includes an axial width 148B that is greater than the diameter of the lock balls 51; e.g., to facilitate alignment. In the unlocked configuration, the lock spring 48 is substantially uncompressed and the release spring 50 is compressed. Referring to FIG. 9, in the unlocked configuration, the pin 146 is received in the axially extending guide portion 108C (see FIG. 9) at the second axial end 108B of the pin guide slot 108.

FIGS. 13-16 illustrate relative movement of HOR 36 components as the HOR 36 transitions from an unlocked configuration to a locked and loaded configuration.

Referring to FIGS. 4 and 13, the piston 38 is moved axially in a direction from the second axial end 56 of the HOR 36 toward the first axial end 54 in the process of transitioning from the unlocked configuration to a locked and loaded configuration. The fan cowl member 28A (see FIGS. 3-3B) is attached to the cowl end of the HOR 36 and as the fan cowl member 28A is rotated outwardly, the piston 38 is drawn in the direction from the second axial end 56 of the HOR 36 toward the first axial end 54; i.e., the HOR 36 is expanding. As can be seen in FIG. 13, the PH retainer 72 engages with the PH retainer bore 90 disposed in the piston head 40. As a result, the piston head 40 moves axially with the piston 38. FIG. 13 shows the first axial end 74 of the piston head 40 engaged with the second axial end 118 of the lock sleeve 44 but the lock sleeve 44 has not yet moved axially. The second lock sleeve shoulder surface 128 is spaced apart from the OC first axial end wall 102, the lock spring 48 is not compressed, and the release spring 50 is compressed. Also in this position, the lock balls 51 are partially disposed in the CS channel 148 and partially disposed in the lock ball apertures 106 of the outer cylinder 42, thereby preventing axial movement of the control sleeve 46.

Referring to FIGS. 4 and 14, the piston 38 is moved axially further in the direction from the second axial end 56 of the HOR 36 toward the first axial end 54 in the transition process. In this position, the lock sleeve 44 has moved axially until the second LS shoulder surface 128 is engaged with the OC first axial end wall 102, the lock spring 48 is now compressed, but the release spring 50 remains compressed because the control sleeve 46 has not yet moved axially. The PH first channel 80 is now aligned with the lock ball apertures 106 of the outer cylinder 42. In this aligned position, the control sleeve 46 tends to move axially towards the first axial end 54 under the spring force from spring 50. As a result of the radial force from the ramp 148D of the CS channel 148, the lock balls 51 are pushed radially inward so as to be partially disposed in the lock ball apertures