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| Number | Title | Issue Date |
| 7357065 | Compound linear motion and rotary actuator To eliminate necessity for rotating a rotation drive mechanism against frictional resistance originated by a sealing portion of a piston when an output shaft is rotated in a component linear motion and rotary actuator. An inside cylinder tube is concentrically provi... | 04/15/2008 |
| 5954105 | Workhead for timber processing There is disclosed a workhead for timber processing, the workhead having a main body and a jaw assembly for grappling timber. The jaw assembly includes first and second cooperating pairs of jaw arms that are pivotally mounted to the main body. The first o... | 09/21/1999 |
| 5577436 | Stepping actuators A stepping actuator having a housing containing two linearly reciprocating members independently and axially slidable, and a common rotating member passed through them. One of the housing and linearly reciprocating members has endless circulating grooves ... | 11/26/1996 |
| 5447095 | Actuator with ring gear and method of manufacturing same A fluid-powered rotary actuator having a body with a cylindrical interior sidewall portion. A drive shaft extends generally coaxially within the body and is supported for rotation relative thereto. The shaft has a grooved, outwardly facing circumferential... | 09/05/1995 |
| 5327812 | Fluid-powered actuator and method of attaching mounting plates A fluid-powered actuator having a body with a shaft adapted for coupling to an external device to provide rotational drive thereto. A piston sleeve is mounted for reciprocal longitudinal movement within the body to provide rotational drive to the shaft. A... | 07/12/1994 |
| 5309816 | Rotary actuator with external bearings A fluid-powered rotary actuator having a body adapted for coupling to a movable member to transfer rotational force thereto. A drive member includes a flange extending axially outward from a body first end, and a stub shaft extending coaxially within the ... | 05/10/1994 |
| 5263324 | Rotary electrothermal actuator An electrothermal actuator for converting electrical energy to rotational mechanical motion includes a housing, a flexible diaphragm disposed in the housing and defining a boiler chamber within the housing, a working fluid disposed within the boiler chamb... | 11/23/1993 |
| 5203171 | Rotary electrothermal actuator An electrothermal actuator for converting electrical energy to rotational mechanical motion includes a housing, a flexible diaphragm disposed in the housing and defining a boiler chamber within the housing, a working fluid disposed within the boiler chamb... | 04/20/1993 |
| 5038672 | Hydraulic rotary actuating apparatus The apparatus includes a steeped axially displaceable piston in a stepped cylinder housing, and a rotary shaft is axial fixed relative to the housing and extends into the piston reduced diameter end portion. The piston reduced diameter portion and the hou... | 08/13/1991 |
| 4989652 | Rotor for crane-mounted working implements, especially tree-processing units A rotator for crane-mounted working implements comprises a housing (7) swingably connectible with the tip of the crane via a joint, and a pivot shaft (8) connectible with the working implement and pivotal relative to said housing by means of at least one ... | 02/05/1991 |
| 4854223 | Pneumatic or hydraulic drive for opening and closing of doors The invention is directed to a penumatic or hydraulic drive for opening and closing of doors, in which the linear motion of a double-acting piston 5 driven by a pressure medium is converted into a rotary motion of a spindle 2 through a piston rod 6 and a ... | 08/08/1989 |
| 4842200 | Pivotable nozzle The present invention relates to a pivotable spraying nozzle intended to be used in the treatment of a chassis for a car body. The device comprises a nozzle and a feeding tube for a chassis treatment agent. The nozzle is supported in a hydraulic/pneumatic... | 06/27/1989 |
| 4794847 | Rotary actuator A rotary actuator for a damper shaft controls the angular position of the damper shaft in accordance with variations in fluid pressure inside of the actuator. The actuator includes a housing, a flexible diaphragm within the housing separating it into a fl... | 01/03/1989 |
| 4745847 | Helical splined rotary actuator Helical splined rotary actuator includes a pair of cylinder housings having inboard ends rotatably mounted in coaxial alignment on opposite ends of a center sleeve member. Contained within the housings are pistons having relatively large diameter helical ... | 05/24/1988 |
| 4646893 | Hydraulic clutch actuator Hydraulic actuator for the operation of clutch discs, consisting of a housing having a hole therein, a hydraulic cylinder having a centrally oriented hole therethrough, the hydraulic cylinder being mounted at its one end to the hole in the housing, and at... | 03/03/1987 |
| 4508016 | Rotary actuated support A fluid-powered, rotary actuated support, including an elongated cylindrical body having ports for introducing pressurized fluid therein; a platform concentric with the cylindrical body and rotatable relative thereto; a radially extending bearing support ... | 04/02/1985 |
| 4499813 | Piston-cylinder device In a piston-cylinder device, a guide ring (11) that is provided with helical flutings (12, 26) is arranged between the piston (25) and the cylinder (2). This guide ring (11) has an inner fluting (12). With this it engages an outer fluting (26) on the pist... | 02/19/1985 |
| 4478319 | Spring-applied brake unit for railway vehicle with manual release arrangement A brake actuator device having a pneumatic service brake piston and a spring parking or emergency brake piston operation of either one of which effects displacement of a brake actuator rod which includes a screw-threaded spindle that operates in a non-rot... | 10/23/1984 |
| 4261251 | Kelly head for hydraulic mast digger A hydraulic mast digger has a kelly head with improved retaining and sealing features. The digger is of the type having a kelly with a bearing assembly mounted between the kelly and a bearing sleeve. The bearing sleeve is reciprocally carried in the hydra... | 04/14/1981 |
| 4226168 | Spring-loaded brake cylinder A spring-loaded brake cylinder particularly for the air brake system of a railway vehicle has a piston slidable within a housing and a threaded shaft and nut assembly between the piston and a piston rod. The nut is carried upon a non-self-locking thread o... | 10/07/1980 |
| 4218960 | Ram with two-part piston rod The invention relates to a ram comprising a piston rod in two parts mounted for relative rotation. A first part extends out of the cylinder, beyond each of the heads, while the second part extends out of the cylinder only beyond one head, namely the upper... | 08/26/1980 |
| 4114517 | Double acting actuator The actuator comprises a cylinder of non-circular cross section having three ports and a center axis, three pistons and a piston rod which is provided with at least one male thread having a pre-determined helical angle at a pre-determined pitch. One of th... | 09/19/1978 |
| 4063491 | Device for discontinuing and automatically restoring the operational function of a spring brake actuator A spring brake actuator has manual means for discontinuing and automatic means for restoring the spring braking function. A non-self-locking nut member is rotatable about the spindle and is releasably locked to the brake cylinder in that direction it rota... | 12/20/1977 |
| 4044871 | Hydraulically operated clutch release bearing A hydraulic release mechanism for automobile clutches comprising a housing open at one end and a bearing. The bearing comprises a rotating race ring adapted to be connected to the operating member of the clutch, a non-rotating race ring and a plurality of... | 08/30/1977 |
| 3989223 | Rotary motion failsafe gate valve actuator An hydraulically operated failsafe valve actuator for use on non-rising valve stems, particularly in a subsea environment. A rotatable shaft is connected to the non-rising valve stem. In one embodiment the valve is actuated to open by a fluid pressure ope... | 11/02/1976 |
| 3972266 | Control cylinder assembly for servo steering systems A control cylinder assembly for servo-steering systems including a fluid pressure circuit and steering shaft and an output shaft, in which a servo piston is supported during axial travel by axially spaced sleeves connected to a housing cover and the sleev... | 08/03/1976 |
