Celebrity Inventors
Mark Twain (Samuel L. Clemens) received Patent No. 121,992 for "An Improvement in Adjustable and Detachable Straps for Garments." He later received two more patents: one for a self-pasting scrapbook and one for a game to help players remember important historical dates.
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| Number | Title | Issue Date |
| 7090475 | Hydraulic control circuit for a hydraulic engine with at least two speeds A hydraulic control circuit for a radial piston engine with two speeds. The changeover between the speeds takes place through the alteration of the absorption volume, the delivery side being connected to the discharge side with a bypass connection by a valve arrange... | 08/15/2006 |
| 5716051 | One-piece seal with fastening section and sealing section A one-piece axial seal is provided for sealing a passage at the interface between a first component and a second component, in particular a fluid conduit or a screw hole. The seal has a fastening section, comprising a projection adapted to be pressed into... | 02/10/1998 |
| 5469704 | Hydraulic drive apparatus comprising a cylinder The invention relates to a hydraulic drive apparatus having a cylinder. Said cylinder comprises a piston movably mounted in a working chamber, a piston rod which is guided towards the outside through a cylinder head and a wear resistant primary seal and a... | 11/28/1995 |
| 5309881 | Engine brake for a multicyclinder internal combustion engine An engine brake for a multicylinder internal combustion engine includes valves that can be periodically opened briefly, in each case outside the exhaust stroke. In the vicinity of the applicable valve drive, a hydraulic piston is provided that is triggere... | 05/10/1994 |
| 5261232 | Valve system for supplying fluid from a pair of fluid pressure sources to a load The invention relates to a valve system for supplying fluid from a pair of fluid pressure sources to a load. A feed valve is provided which feeds--when required--a partial flow of the second fluid pressure source into the feed line of the load which is co... | 11/16/1993 |
| 5257605 | Engine brake for a multicylinder internal combustion engine An engine brake for a multicylinder internal combustion engine includes valves that can be periodically opened briefly, in each case outside the exhaust stroke. In the vicinity of the applicable valve drive, a hydraulic piston is provided that is triggere... | 11/02/1993 |
| 4967554 | Commonly-piloted directional control valve and load pressure signal line relieving switching valve A load-independent control device for hydraulic users has an initial position in which a control line transmitting a load pressure is connected with a tank. The control device has a control valve for the user and a switching valve, which can be controlled... | 11/06/1990 |
| 4960035 | Control system for a hydraulic lift driven by a variable displacement pump A control system for a hydraulic lift driven by a variable displacement pump is disclosed. It is comprised of a blocking valve which may be opened at least for lowering movement of the hydraulic lift. A control device is provided for opening and closing t... | 10/02/1990 |
| 4860634 | Arrangement for controlling the travel of two hydraulic cylinders For setting and guiding a band running round two rolls the bearings of the roll on either side are each adjustable by a hydraulic or lifting cylinder. Each hydraulic cylinder comprises a position control circuit. The position desired value applied jointly... | 08/29/1989 |
| 4835966 | Control switching arrangement for a hydraulic power lift A control switching arrangement for a hydraulic power lift control system comprises a power lift control valve which is controlled via control lines in a low pressure section. The main hydraulic section is controlled by the said control valve via a check ... | 06/06/1989 |
| 4809746 | Proportional throttle valve A proportional throttle valve which varies the throttle cross-sectional area in dependence upon a control signal and thus governs the flow rate. The invention relates to a throttle valve in which the position of the valve member remains constant independe... | 03/07/1989 |
| 4785715 | Hydraulic control means for a sweeping roller held by two cylinders in a sweeping machine The sweeping roller of a sweeping machine is held on the ground in sweeping operation by two hydraulic cylinders in such a manner that the degree of wear is small. For this purpose in each cylinder a static and different holding pressure must be set. The ... | 11/22/1988 |
| 4622883 | Apparatus for positioning a movable member An apparatus for controlling the movement of a movable element as a working circuit (10) with a directional control valve (3) equipped to control devices (11, 12) which can be pressure activated in two directions. A control circuit (29) which can be conne... | 11/18/1986 |
| 4484480 | Load measuring apparatus A load measuring apparatus for determining a load affecting a predetermined point of a mechanical system including a solid state member to which the load is directly transmitted and an integrated monolithic sensor, connected with the solid state member, w... | 11/27/1984 |
| 4478250 | Pressure control valve A pressure control valve construction comprising a valve body having an inlet port adapted for connection to a pressure source, a pair of working ports adapted for connection to respective loads, and a pair of outlet ports connected to a reservoir. A cont... | 10/23/1984 |
