Distributor Motor Working Member Is Valve Seat For Pilot Valve Patents (Class 91/312)
  • Patent number: 9328866
    Abstract: A treadmill includes a tread deck supported on a tread base for rotatably supporting an endless belt, a motor driving device coupled to the endless belt for driving the endless belt to move around the tread deck, a lubricant supplying device having a container for containing a lubricant, a pump device attached to the container for pumping the lubricant out of the container, a motor coupled to an actuating rod for actuating the actuating rod toward and away from the pump device and to force the lubricant to flow out through the pump device, and a pipe is coupled to the pump device for receiving the lubricant from the container and for supplying the lubricant to lubricate the endless belt.
    Type: Grant
    Filed: January 9, 2014
    Date of Patent: May 3, 2016
    Assignee: Sports Art Industrial Co., Ltd.
    Inventor: Hai Pin Kuo
  • Patent number: 5860794
    Abstract: An air operated double diaphragm pump is provided with an air valve assembly which allows the valve cup to move in a rectangular pattern.
    Type: Grant
    Filed: April 10, 1997
    Date of Patent: January 19, 1999
    Assignee: Graco Inc
    Inventors: Kent P. Hand, Ann C. Feitel, Joel T. Fisher, Harold D. Johnson, Graig D. Burt
  • Patent number: 5174322
    Abstract: A four-way hydraulic control valve automatically reverses flow of hydraulic fluid to a double acting hydraulic cylinder or to a reversible hydraulic motor when a substantial resistance to fluid flow is encountered, such as when the cylinder or a machine being operated by the cylinder or motor reaches a mechanical limit of its motion. The valve has a reciprocating spool in a valve body with two internal control valves, one at each end, and with appropriate internal pressure shunts for directing high pressure fluid into the control valves and drain fluid restrictions to shuttle the spool back and forth in response to an increase in pressure resulting from a substantial resistance to fluid flow.
    Type: Grant
    Filed: March 7, 1991
    Date of Patent: December 29, 1992
    Assignee: Town & Country Research & Development, Inc.
    Inventor: Clayton A. Melrose
  • Patent number: 4971531
    Abstract: A compressed air pump comprising a compressed air piston motor (11) having a cylinder housing (12) and a low pressure piston (22) moveable between first and second end wall parts (13, 14) and a hydraulic piston pump (15) in the second end wall part (14). One side of the low pressure piston and the first end wall part together define a working chamber (21) and the other side of the piston (22) abuts and drives the hydraulic piston (24). A pilot piston (25), which is controlled by the low pressure piston (22) controls the supply of compressed air to the working chamber (21). A spring powers the return stroke of the low pressure piston and the hydraulic piston. The pilot piston (25) is housed in a pilot cylinder (35) incorporated in the first end wall part (13) and is mounted for movement between a first position and a second position. In the first position compressed air can be passed from an inlet (17) in the end wall part to the working chamber.
    Type: Grant
    Filed: October 26, 1989
    Date of Patent: November 20, 1990
    Assignee: AB Nike
    Inventor: Vilho Aikioniemi
  • Patent number: 4949622
    Abstract: A fluid operable engine has a cylinder in which a piston slides up and down. The cylinder has a cylindrical wall and two end walls. The piston divides the cylinder into two chambers. The piston is hollow, has a cylindrical wall and two end walls, with a rigid tube extending from and through one end wall of the piston through an adjacent end wall of the cylinder so that the interior of the piston communicates with the exterior through the tube. The cylinder has an aperture in each end wall or in its cylindrical wall close to the end walls and the piston has an opening in each of its end walls. A closure member is provided for alternately closing the openings or the apertures as the piston reaches each end wall. The engine is operated either in a positive or negative manner, with fluid being charged into or sucked from the piston or the cylinder. The openings may be closed from within or without and the apertures may be closed from inside or outside. The closure member may be mechanically or fluid operable.
    Type: Grant
    Filed: December 5, 1988
    Date of Patent: August 21, 1990
    Inventor: David A. Brooks
  • Patent number: 4870891
    Abstract: A double acting piston and cylinder air motor with pneumatically actuated pilot valves for shifting a directional control valve, where the pilot valves are controlled by pilot ports in the cylinder as they are uncovered by the piston.
    Type: Grant
    Filed: March 13, 1989
    Date of Patent: October 3, 1989
    Assignee: Stewart Warner Corporation
    Inventors: Jerry D. Shew, Stuart A. Evans
  • Patent number: 4728267
    Abstract: A fluid driven reciprocating pump comprises a pair of heads each containing a displaceable member defining a drive chamber and a pump chamber on opposite sides of the diaphragm in one head, and a drive chamber and an inactive chamber on opposite sides of the diaphragm in the other head. A mechanical coupling connects the two displaceable members for reciprocation together; and a control valve assembly connects the drive chambers of both heads to a source of pressurized fluid for driving them through forward strokes, a spring driving the heads through return strokes.
    Type: Grant
    Filed: January 27, 1987
    Date of Patent: March 1, 1988
    Assignee: T.M.B. Fertilizer Pumps Ltd.
    Inventors: Alexander Ruttenberg, Alexander Zur
  • Patent number: RE34301
    Abstract: A fluid operable engine has a cylinder in which a piston slides up and down. The cylinder has a cylinder wall and two end walls. The piston divides the cylinder into two chambers. The piston is hollow, has a cylindrical wall and two end walls, with a rigid tube extending from and through one end wall of the piston through an adjacent end wall of the cylinder so that the interior of the piston communicates with the exterior through the tube. The cylinder has an aperture in each end wall or in its cylindrical wall close to the end walls and the piston has an opening in each of its end walls. A closure member is provided for alternately closing the openings or the apertures as the piston reaches each end wall. The engine is operated either in a positive or negative manner, with fluid being charged into or sucked from the piston or the cylinder. The openings may be closed from within or without and the apertures may be closed from inside or outside. The closure member may be mechanically or fluid operable.
    Type: Grant
    Filed: September 9, 1991
    Date of Patent: July 6, 1993
    Assignee: Garmar, Inc.
    Inventor: David A. Brooks