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"The idea that cavalry will be replaced by these iron coaches is absurd. It is little short of treasonous."
Aide-de-camp to Field Marshal Haig ; At a tank demonstration, 1916
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| Number | Title | Issue Date |
| 4568058 | Dual stage hydraulic actuator for expanding gate valve A dual stage hydraulic actuator (9) for actuation of an expanding gate valve (10). The actuator is mountable to the valve housing and comprises a housing 40 which defines a piston chamber 41 and a primary piston (61) slidably received therein. An actuator... | 02/04/1986 |
| 4179099 | Expanding gate valve An expanding gate valve according to the present invention includes a gate system incorporating a pair of segments, one segment being formed to define opening cam surface means and the other segment being formed to define closed cam surface means. Spreade... | 12/18/1979 |
| 4018420 | Slide valve for closing a large pressurized gas conveying pipe A housing, connectable to a pipe, has therein an opening, a chamber, a stationary sealing seat, and a movable sealing seat displaceable toward and away from the stationary sealing seat. A slide plate is movable from an open position, exterior of the housi... | 04/19/1977 |
