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John S. Pilch Patents
Pilch; John S.
Ware, MA
No. of patents:

Patent Number Title Of Patent Date Issued
4904149 Swing mechanism for an earth-moving apparatus February 27, 1990
A swing mechanism for an earth-moving apparatus having a main frame and a swing frame which is pivoted at the main frame about a vertical axis. The swing mechanism includes a pair of slide members which are in sliding engagement with a pair of slide surfaces. Each slide member is operati
4355945 Tool mounting apparatus October 26, 1982
A tool mounting apparatus is disclosed for detachably mounting a tool component such as for example a bucket, on a carrier such as for example the dipper stick of a backhoe. A power hitch component is connected to the carrier. Notches on one of the components are arranged to receive a fi
4235567 Material handling machine with adjustable speed-power relationship for boom movement November 25, 1980
In a material handling machine having a turret, a boom supported by the turret for movement about a first pivot, and a piston-cylinder unit for pivoting the boom about the first pivot, the piston-cylinder unit being supported by the turret for pivotal movement about a second pivot parall
4138928 Fluid actuated apparatus February 13, 1979
This invention is directed to fluid actuated apparatus for automatically restricting the flow of fluid in conduits leading to and/or from fluid actuated cylinder means for causing pivotal movement of a member, such as the turret carrying the boom and bucket of a backhoe, so that the spee
4078680 Swing mechanism for earthmoving apparatus such as a backhoe March 14, 1978
Swing mechanism for a backhoe, crane or other earthmoving apparatus which includes a main frame, a rotatable turret supported by the frame, the drive mechanism includes a pair of hydraulic rams supported by the frame in partially coextensive lateral relationship. The drive strokes of sai
4043470 Hitch for coupling alignment of tractor and backhoe August 23, 1977
Hitch for coupling together a self-propelled hauling vehicle or tractor and a separate earth moving rig or backhoe which includes hydraulic stabilizers for raising and lowering the coupling end portion of the backhoe. The tractor and backhoe are each provided with interengageable cou

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