公开(公告)号：US20170130745A1

公开(公告)日：2017-05-11

申请号：US14934568

申请日：2015-11-06

Applicant: Caterpillar Inc.

Inventor： Dennis Ray BARBER

IPC: F15B13/02 ,  F16K31/122 ,  F16K11/07

CPC classification number: F15B13/021 ,  F15B13/0435 ,  F16K11/07 ,  F16K31/1221

Abstract: A valve is disclosed for use with a hydraulic circuit. The valve may have a valve block, a central bore formed in the valve block, an actuator passage formed in the valve block and intersecting with the central bore, and at least one of a supply and a drain passage. The valve may also have a control spool movable to selectively connect the actuator passage and the at least one of the supply passage and the drain passage. The control spool may have a base end, and a tip end with a tapered outer surface. The valve may also have a first actuator configured to selectively meter a flow of pilot fluid and having a feedback follower configured to ride along the tapered outer surface of the control spool, and a second actuator configured to selectively direct the pilot fluid to the base and tip ends of the control spool.

公开(公告)号：US20170130864A1

公开(公告)日：2017-05-11

申请号：US14934576

申请日：2015-11-06

Applicant: Caterpillar Inc.

Inventor： Dennis Ray BARBER ,  Matthew J. BESCHORNER

IPC: F16K31/42 ,  F15B11/08 ,  F15B13/04 ,  F16K11/07

CPC classification number: F16K31/426 ,  F15B11/08 ,  F15B13/0402 ,  F15B13/0435 ,  F15B2211/20576 ,  F15B2211/255 ,  F15B2211/30575 ,  F15B2211/329 ,  F15B2211/351 ,  F15B2211/353 ,  F16K11/07 ,  Y10T137/86622

Abstract: A valve is disclosed for use with a hydraulic circuit. The valve may have a valve block, a central bore formed in the valve block, an actuator passage formed in the valve block and intersecting with the central bore, and at least one of a supply and a drain passage. The valve may also have a control spool movable to selectively connect the actuator passage and the at least one of the supply passage and the drain passage. The control spool may have a base end, and a tip end with a tapered outer surface. The valve may also have a first actuator configured to selectively direct pilot fluid to the tip end of the control spool, and a second actuator configured to selectively direct pilot fluid to the base end of the control spool. Each of the first and second actuators may have a primary axis oriented generally orthogonal to an axis of the control spool, and may be located at opposing sides of the control spool.

公开(公告)号：US20170130857A1

公开(公告)日：2017-05-11

申请号：US14934591

申请日：2015-11-06

Applicant: Caterpillar Inc.

Inventor： Dennis Ray BARBER

IPC: F16K31/06 ,  F16K27/04 ,  E02F9/00 ,  F16K11/06

CPC classification number: F16K31/061 ,  E02F9/00 ,  E02F9/2296 ,  F16K11/06 ,  F16K11/07 ,  F16K27/04 ,  F16K27/041 ,  F16K31/0613 ,  Y10T137/86606 ,  Y10T137/86614 ,  Y10T137/8671

Abstract: A pilot actuator is disclosed for use with a valve. The pilot actuator may have a cage with a base end and a tip end, and a pilot bore formed in the cage. The pilot actuator may also have a supply port, a drain port, a first end port, and a second end port each formed in the cage and intersecting with the pilot bore. The pilot actuator may further have a pilot spool slidingly disposed in the pilot bore and movable to selectively connect the supply port and the drain port with the first and second end ports, a follower separate from the cage and disposed at the tip end of the cage, and at least one spring operatively connecting the follower to the cage and to the pilot spool.