公开(公告)号：US3655208A

公开(公告)日：1972-04-11

申请号：US3655208D

申请日：1970-04-13

Applicant: MC DONNELL DOUGLAS CORP

Inventor： WALKER JAMES V

IPC: F16J9/28 ,  F16J9/06 ,  F16J9/14

CPC classification number: F16J9/28 ,  Y10S277/924 ,  Y10T29/49284

Abstract: A plastic or plastic-like piston ring of the expandable type for use in hydraulic and pneumatic actuators is constructed from a single annular member and the expansion and contraction capabilities are provided by partially radially slitting the ring and by cutting a pair of stepped joints through opposite sides of the ring.

Abstract translation: 用于液压和气动致动器的可膨胀型的塑料或塑料状活塞环由单个环形构件构成，并且膨胀和收缩能力通过部分地径向切割环并通过相对的切割一对阶梯式接头而提供 戒指的两边。

公开(公告)号：US3698728A

公开(公告)日：1972-10-17

申请号：US3698728D

申请日：1971-01-07

Applicant: MC DONNELL DOUGLAS CORP

Inventor： WALKER JAMES V

IPC: F16J15/10

CPC classification number: F16J15/104

Abstract: An improved fluid seal designed for precluding leakage of fluid between two mating surfaces. The seal includes a back-up device and a pressure loading element. The back-up device is shaped like a ring having an outer ring portion and two side flanges integral with the inner periphery of the outer ring portion and extending radially inwardly therefrom. The side flanges are spaced apart from each other to define an inwardly facing annular channel for retaining the pressure loading element. The seal may be easily installed in a groove formed in one of the mating surfaces to prevent leakage.

公开(公告)号：US3916933A

公开(公告)日：1975-11-04

申请号：US17078271

申请日：1971-08-11

Applicant: MC DONNELL DOUGLAS CORP

Inventor： BOEHRINGER WILFRED E ,  WALKER JAMES V

IPC: B60T8/32 ,  B60T8/36 ,  B60T13/12 ,  G05D7/00 ,  G05D11/02

CPC classification number: B60T8/325 ,  B60T8/36 ,  B60T13/12 ,  Y10T137/2544 ,  Y10T137/2617

Abstract: A multi-stage, three port valve in which input commands are fed to a first stage which normally modulates the flow of medium to an actuator. During high demand conditions, differential pressures generated within the valve cause one or more other stages of the valve to automatically supplement medium flow as required.

Abstract translation: 多级三通阀，其中输入命令被馈送到通常将介质流动调节到致动器的第一级。 在高需求条件下，阀内产生的压差会导致阀的一个或多个其他级别，根据需要自动补充介质流量。