Valve for apparatus including a lifting device
AssigneeHarbor Freight Tools USA, Inc.
InventorAndrew McGraw
Life of this patent
Estimating the term…
Loading patent…
AssigneeHarbor Freight Tools USA, Inc.
InventorAndrew McGraw
Estimating the term…
According to embodiments, a valve in a lifting device is configured to operate in a metering mode and in a shutoff mode to control fluid through an orifice, the valve comprising: a poppet; a first portion (e.g., a screw or a piston head) configured to move in a first direction forcing the poppet to seal the orifice in the shutoff mode, and further configured to move in a second direction releasing the poppet from the orifice in the metering mode; and a second portion (e.g., a spring, such as a plurality of Belleville washers) configured to regulate positioning of the poppet with respect to the orifice in the metering mode. The first portion may be not compressible, and wherein the second portion may be compressible. A flow rate of the fluid may be adjustable corresponding to an adjustable position of the first portion.
A valve in a lifting device, wherein the valve is configured to operate in a metering mode and in a shutoff mode to control fluid through an orifice, the valve comprising:
A lifting device, comprising:
A lifting device for supporting an object, the lifting device comprising:
Dependencies are inferred from the claim text.