Shift rod piston seal arrangement for a vibratory plate compactor
AssigneeM-B-W Inc.
InventorsEric A. Niemi, Michael W. Schmitt
Life of this patent
Estimating the term…
Abstract
An easily accessible phase adjustment mechanism for a vibratory plate compactor includes an improved seal arrangement to protect against leakage of internal lubricating oil into the hydraulic cylinder providing fluid pressure to the adjustment mechanism. An easily demountable cylinder housing provides ready access to the piston and seal assembly which can then be threadably detached and replaced in its entirety.
Claims6
A quick access and easily replaceable improved seal arrangement for a shift rod piston in a vibratory plate compactor of the type in which a main rotating input shaft is journaled in a main housing, the housing including a liquid lubricant reservoir, said input shaft having an axial bore in which a shift rod carrier head is journaled on the end of the shift rod opposite the piston for operative adjustable connection to the input shaft, a cylinder housing attached to the main housing and having a bore coaxial with the input shaft bore, said housing bore sized to receive the shift rod piston, and the cylinder housing having a connection to a supply of pressurized hydraulic fluid for pressurizing the cylinder housing and piston to move the shift rod axially in the input shaft bore, said arrangement comprising:
- a threaded connection for demountably attaching the piston to the shift rod;
- seal means providing a hydraulic fluid seal and a liquid lubricant seal between the piston and the cylinder housing bore;
- and,
- a mounting device for demountably attaching the cylinder housing to the main housing.
Dependencies are inferred from the claim text.