A length adjusting device has a guiding track and a controlling assembly. The guiding track has a guiding structure and a locking structure. The controlling assembly has a connecting base, an engaging body, a switch base, a spring, a switch, and a controlling body. The guiding track is mounted between the connecting base and the engaging body. The engaging body is selectively engaged with the guiding track. The switch is combined with the connecting base and has a switching recess. The spring is mounted between and compressed by the engaging body and the switch base. The switch is selectively engaged in the switching recess. The controlling body is mounted on the switch base and has a gear engaged with the guiding track.

Exemplary arrangements relate to a clothing system that comprises a plurality of clothing items (1, 2, 3). Each of the clothing items is configured to be worn simultaneously in layered relation with at least one of the other clothing items. Each of the clothing items includes at least one hold device (5, 6, 7). Each hold device is configured to releasably hold a protective textile item (4) in engagement with the respective clothing item. One or more protective textile items in engaged relation with the respective clothing item provides one or more desired properties suitable for addressing environmental or occupational conditions.

A fluid-filled damper system for apparel and protective padding manages impact forces through controlled fluid movement between chambers. The system includes a flexible bladder defining first and second fluid chambers connected by a flow restrictor that limits fluid transfer rate between chambers. When force is applied to the first chamber, fluid displaces into the second chamber at a rate regulated by the flow restrictor, creating progressive damping that varies with compression rate.

A motorized ambulatory assist device is configured to augment natural walking or running motion by applying torque to an article of footwear at specific points in a gait cycle. The device includes a shin-mounted control pack secured to a lower leg of a wearer, a drive unit rigidly coupled to the control pack, a lower control arm rotatably coupled to both the drive unit and the article of footwear, and a motor assembly that tensions a drive belt extending between the motor and the lower control arm. The device may include a quick disconnect coupling that enables selective attachment and detachment from the footwear, a fluid-filled bladder between the control board assembly and shin guard to dampen reactionary forces, and flexible battery packs integrated with elastic bands that secure the device to the wearer's leg.

A magnetic quick-release closure system for apparel and footwear applications combines magnetic attraction with mechanical retention to provide secure closure with intuitive, single-handed release capability. The system includes a closure panel with first and second edges, and a receiving surface with complementary features. The first edge nests within an upstanding convex ledge on the receiving surface, creating a pivot point. Multiple magnet pairs draw the panel toward the receiving surface and assist alignment. A spring-biased retention latch engages the second edge of the closure panel when closed, providing mechanical security during athletic activities. A pull tab enables a translational pulling motion of the closure panel, aligning a notched portion on its second edge with the latch for quick release. The system may also incorporate magnetic repulsion assistance for opening and an over-center locking feature for enhanced security under tension.

A rotatable quick disconnect coupling system for apparel and footwear applications provides secure attachment and detachment between components while enabling rotational movement. The system includes a keyed post with a non-radially symmetric cross-sectional profile that inserts into a receiver with a complementary internal profile, preventing unintended rotation of the post within the receiver. A spring-biased latching protrusion extends from the keyed post to engage a retention edge of the receiver when fully inserted. A user-activated release mechanism allows easy detachment by retracting the latching protrusion, via configurations such as an upstanding tab or a push-button. A bearing shaft extending from the keyed post rotatably couples with an annular portion of a connected component, enabling rotational movement while maintaining secure attachment.

A flexible battery system for wearable and robotic applications comprises rigid or semi-rigid battery cells interconnected by flexible interconnection sections that enable conformability to curved contours while maintaining electrical connectivity. Each flexible interconnection section includes a flexible substrate with embedded conductive elements such as conductive traces, wires, or accordion-folded materials. The system includes a protective encapsulation layer and the battery cells may be arranged in linear, circular, or matrix configurations, including auxetic patterns for enhanced three-dimensional conformability.

A wearable airbag includes an attachment unit, which is provided at the wearable airbag and a counterpart wearable airbag so as to structurally connect the wearable airbag to the counterpart wearable airbag, the counterpart wearable airbag being worn at a location on a user's body adjacent to a location at which the wearable airbag is worn, and an electrical connection unit configured to transmit and receive an electrical signal to the counterpart wearable airbag in a state in which the wearable airbag is coupled to the counterpart wearable airbag via the attachment unit.

Systems, methods, and other embodiments for removably attaching personal protective equipment (PPE) to an air intake device, including an air intake device having a removable filter, a personnel protective equipment (PPE), wherein the PPE includes an opening located on a portion of the PPE such that the opening is sized and shaped to accommodate one end of the removable filter, a sealing flange operatively connected to the opening, a gasket seal, wherein the gasket seal is configured to be retained within the sealing flange, and a plurality of fasteners located around a periphery of the one end of the removable air filter, wherein the plurality of magnets are configured to interact with the gasket seal and sealing flange to removably attach the PPE to the removable air filter.