Abstract: A retractable handle on a dolly for a portable compressor has a handle assembly including at least one handle pole and a handle grip member. The handle assembly is clamped onto a frame of the dolly using a clamp assembly. The clamp assembly includes a bearing portion configured for mounting the clamp assembly onto the frame, and a bushing portion for slidingly engaging the handle pole with respect to the clamp assembly.

Abstract: An air filter assembly including an air filter housing having a base, a sidewall, and an upper end, being configured for receiving an air filter element, and an end cap configured for attachment to the upper end of the housing without the use of tools.

Abstract: A pressure washer has an inlet and an outlet, a pump assembly in fluid communication with the inlet and the outlet, and a motor which drives the pump assembly. A flow switch is disposed upstream of the pump assembly, and is electrically connected to the motor. Configured to be extended with a biasing structure towards the inlet, an axially displaceable flow plunger seals the pump assembly from fluid communication with the inlet. The flow plunger is also configured to be retracted when a fluid force of a fluid from the inlet overcomes the bias of the biasing structure. When the flow plunger is retracted, the flow plunger automatically turns the pressure washer motor on.

Abstract: A dolly and compressor assembly for transporting compressors has a frame with a handle structure and a support portion. At least one wheel and a platform are attached to and supported by the support portion. To accommodate a compressor, a retention formation is disposed on the platform for engaging the compressor. The compressor, in turn, is provided with a receptor structure configured to receive the retention formation on the platform.

Abstract: A dolly and compressor assembly for transporting compressors has a frame with a handle structure and a support portion. At least one wheel and a platform are attached to and supported by the support portion. To accommodate a compressor, a retention formation is disposed on the platform for engaging the compressor. The compressor, in turn, is provided with a receptor structure configured to receive the retention formation on the platform.

Abstract: A multi-part foundation ventilator. The ventilator has a first frame member with a first exterior peripheral edge flange, and, extending inwardly therefrom, a protruding wall portion of preselected width X.sub.1(A). The first inwardly protruding wall portion has an outer surface portion with a first receiving ledge portion and a protruding, first joining flange portion. A second frame member has a second inwardly protruding wall portion of preselected width X.sub.2(A). The second inwardly protruding wall portion further includes an outer surface portion, with a second receiving ledge portion and a second joining flange portion. The first joining flange portion of the first frame member is sized and shaped to fit in close fitting, overlying engagement with the second receiving ledge portion of the second frame member.