US4408405A - Underwater excavator - Google Patents

US4408405A - Underwater excavator - Google Patents

US6482053B1 - Marsh excavator - Google Patents

The present invention is a flotation apparatus converting a land excavator for amphibious operation. The conversion package comprises a pair of elongated pontoon assemblies secured to each other in a spaced apart manner by transverse support beams telescopically and detachably connected to transverse sleeves located in each pontoon the beams fitted with a base to …

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US3430790A - Excavator - Google Patents

US3430790A - Excavator - Google Patents Excavator Download PDF Info Publication number US3430790A. Cleaning robot and underwater sediment cleaning apparatus and method CN102367058A (en) * Liming: Liming:

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US4408405A - Underwater excavator - Google Patents

US4408405A US06/250,471 US25047181A US4408405A US 4408405 A US4408405 A US 4408405A US 25047181 A US25047181 A US 25047181A US 4408405 A US4408405 A US 4408405A Authority US United States Prior art keywords excavator barrier eductor horizontal nozzle Prior art date Liming Legal status (The legal status is an assumption and is not a …

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JP2018523771A - Underwater trench - patents.google.com

A bottom trench excavator, a pump device, and a method for operating the bottom trench excavator are provided. A submarine trench excavator and pump apparatus includes first and second pumps and a trench excavation spray tool having first and second sections, wherein the first pump is a source of water. And an inlet for fluid connection to the first section of the …

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Patents Assigned to Caterpillar Tractor Co. - Justia

Type: Grant. Filed: April 17, 1978. Date of Patent: December 18, 1979. Assignee: Caterpillar Tractor Co. Inventor: Alexander Goloff. Electronic directional control circuit. Patent number: 4178518. Abstract: Lift trucks (10) have many hand control levers which are manipulated to hoist a load, propel the lift truck (10) forward and rearward, and

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United States Patent and Trademark Office

Nov 26, 2012 · This page is owned by Office of Patent Classification. Last Modified: 11/26/2012 5:18:16 PM

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US Patent Full-Text Database Manual Search

Patents from 1790 through 1975 are searchable only by Issue Date, Patent Number, and Current Classification (US, IPC, or CPC). When searching for specific numbers in the Patent Number field, utility patent numbers are entered as one to eight numbers in length, excluding commas (which are optional, as are leading zeroes).

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Issue Dates and Patent Numbers Since 1836

A brief description of these patent documents is provided on the following page. The patent documents listed in this report are as follows: 1) 1836-Series Patents (Utility Patents) - Mechanical, electrical, and chemical patents issued since July 13, 1836, which are frequently designated as "utility" patents, are included in this document set.

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US3999312A - Water jet type underwater - Google Patents

In a water jet type underwater ground excavator wherein an underwater pump portion is carried on an excavator body including stabilizer sleds, an excavation portion protrudes downwardly and rearwardly under the excavator body, and water is delivered from the underwater pump portion to the excavation portion and then ejected from jet nozzles of the excavation portion so as to …

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G - Index to the U.S. Patent Classification System

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