Abstract: A helmet includes an energy absorbing layer and an outer shell mounted to the energy absorbing layer. The outer shell includes an air trip in the form of a continuous groove that extends from a bottom left side of the helmet to a bottom right side of the helmet.

Abstract: An apparatus comprising a helmet. The helmet can include at least one vent. A vent adapter can be configured to secure into the at least one vent. The vent adapter can include a first attachment surface and a second attachment surface. A mount can be configured to secure into the vent adapter. The mount can include a first attachment portion configured to mate with the first attachment surface. The mount can also include a second attachment portion configured to mate with the second attachment surface.

Abstract: An apparatus comprising a helmet. The helmet can include at least one vent. A vent adapter can be configured to secure into the at least one vent. The vent adapter can include a first attachment surface and a second attachment surface. A mount can be configured to secure into the vent adapter. The mount can include a first attachment portion configured to mate with the first attachment surface. The mount can also include a second attachment portion configured to mate with the second attachment surface.

Abstract: A quick connection device for removably connecting a headrail and a covering portion of a window covering assembly is disclosed. The quick connection device may include a male portion connected to the headrail and a female portion connected to the covering portion. Preferably, operation of the quick connection device by a user should allow of for the easy removal of the covering portion from the headrail.

Abstract: A quick connection device for removably connecting a headrail and a covering portion of a window covering assembly is disclosed. The quick connection device may include a male portion connected to the headrail and a female portion connected to the covering portion. Preferably, operation of the quick connection device by a user should allow of for the easy removal of the covering portion from the headrail.

Abstract: A quick connection device for removably connecting a headrail and a covering portion of a window covering assembly is disclosed. The quick connection device may include a male portion connected to the headrail and a female portion connected to the covering portion. Preferably, operation of the quick connection device by a user should allow of for the easy removal of the covering portion from the headrail.

Abstract: A window covering or shade for selectively covering, uncovering and providing a light filtering position where visibility is substantially blocked but light is allowed to enter therethrough. The window covering may include, among other components, a head rail and a unitary sheet of material. The window covering is preferably substantially constructed of a supple or non-rigid material.

Abstract: A quick connection device for removably connecting a headrail and a covering portion of a window covering assembly is disclosed. The quick connection device may include a male portion connected to the headrail and a female portion connected to the covering portion. Preferably, operation of the quick connection device by a user should allow of for the easy removal of the covering portion from the headrail.

Abstract: A synchronizing device for a parallel connection of a synchronous generator and an a.c. network. The device includes a measuring circuit for measuring the voltage and frequency of the generator and the a.c. network and for measuring the phase angle between the generator and the a.c. network. The measuring circuit includes control outputs for regulating the rotational speed of the generator drive. A set value for the generator frequency includes a defined slip at the start of balancing. The measuring circuit also regulates the voltage output of the generator to match the a.c. network voltage. Once the phase angle between a.c. network voltage and generator voltage has fallen below a predefined value, null balance occurs.