Ammonia driven underwater motor

Claim 2

A motive device for operation within a surrounding water medium from a source of ammonia gas, said device comprising: motor means, including a rotary output shaft and having gas inlet and exhaust ports, for producing rotation of said shaft; a rigid housing defining a closed chamber, connected to said exhaust port, for receiving spent ammonia gas from said motor means; water metering means, mounted on said housing and operatively associated with said motor means, for introducing predetermined amounts of water from said medium into said chamber for absorbing said spent ammonia gas; and water expelling pump means, mounted on said housing and operatively associated with said motor means, for expelling ammonia laden water from said chamber into said surrounding water medium.

Claim 3

A motive device as defined in claim 1, and wherein: said shaft extends through said chamber; and said operative associations of said water metering means and said water expelling means with said shaft comprise off center cam means on said shaft.

Claim 4

A motive device as defined in claim 2, and wherein: said water metering means comprises spray means for increasing the surface area of said predetermined amounts of water as they are introduced into said chamber.

Claim 5

A motive device as defined in claim 3, and further comprising: moving surface means, operatively connected to said shaft in the path of water from said spray means and having surfaces disposed in the path of said spent ammonia gas as it enters said chamber.

Claim 6

A motive device as defined in claim 4, and wherein: said moving surface means comprises a perforated, cylindrical drum concentrically mounted on said shaft and disposed with one end adjacent said exhaust port.

Claim 7

A motive device as defined in claim 4, and wherein: said water metering means comprises a body defining a cylinder and having inlet and outlet passages, a plunger reciprocable in said cylinder by said off center means, and valve means positively actuated from rotation of said shaft to alternatively open and close said inlet and outlet passages in predetermined timed relation to reciprocation of said plunger.

Claim 8

A motive device as defined in claim 6, and wherein: said water expelling means comprises a positive displacement pump.

Claim 9

A motive device as defined in claim 7, and wherein: said positive displacement pump is characterized by intake means within said chamber that renders said pump operative only to expel water therefrom in excess of a predetermined volume.

Claim 10

A motive device as defined in claim 8, and wherein: said water expelling pump has a capacity at least equal to the capacity of said metering means, whereby water in said chamber is prevented from accumulating substantially beyond said predetermined volume.

Claim 11

A motive device as defined in claim 9, and wherein: said moving surface means comprises a perforated cylindrical drum concentrically mounted on said shaft for rotation therewith and disposed in alignment with flow of said ammonia into said chamber.

Claim 12

A power tool for use at substantial water depths from a source of ammonia gas under pressure, said tool comprising: a rigid housing defining an ammonia receiving chamber; an expansible chamber, rotary motor mounted at one end of said housing, said motor having a rotary shaft extending through said ammonia receiving chamber, an inlet port connected to said source, and having an exhaust port communicating with said ammonia receiving chamber; a water metering pump mounted on said housing and comprising a body defining a first cylinder connected by an inlet passage to the exterior of said housing and by an outlet passage to said ammonia receiving chamber, said metering pump further comprising a first plunger reciprocable in said first cylinder in response to rotation of said shaft and a rotary valve member operative to alternatively open and close said inlet and outlet passages in timed relation to reciprocation of said plunger; a water expelling pump mounted on said housing and comprising a body defining a second cylinder connected by an inlet passage to a predetermined location within the interior of said ammonia receiving chamber and by an outlet passage to the exterior of said housing, said water expelling pump further comprising a second plunger reciprocable in said second cylinder in response to rotation of said shaft and first and second check valves in said inlet and outlet passages, respectively; a cam rotatable with said shaft for effecting reciprocation of said first and second plungers; cooperating gears on said shaft and rotary valve member for effecting said timed relation; and chuck means, coupled to said shaft, for holding a tool piece.

Claim 13

A power tool for use at substantial water depths from a source of ammonia gas under pressure, said tool comprising: a rigid housing defining an ammonia receiving chamber; an expansible chamber, rotary motor mounted at one end of said housing, said motor having a rotary shaft extending through said ammonia receiving chamber, an inlet port connected to said source, and having an exhaust port communicating with said ammonia receiving chamber; a water metering pump mounted on said housing and comprising a body defining a first cylinder connected by an inlet passage to the exterior of said housing and by an outlet passage to said ammonia receiving chamber, said metering pump further comprising a first plunger reciprocable in said first cylinder in response to rotation of said shaft and a rotary valve member operative to alternatively open and close said inlet and outlet passages in timed relation to reciprocation of said plunger; a water expelling pump mounted on said housing and comprising a body defining a second cylinder connected by an inlet passage to a predetermined location within the interior of said ammonia receiving chamber and by an outlet passage to the exterior of said housing, said water expelling pump further comprising a second plunger reciprocable in said second cylinder in response to rotation of said shaft and first and second check valves in said inlet and outlet passages, respectively; a cam rotatable with said shaft for effecting reciprocation of said first and second plungers; cooperating gears on said shaft and rotary valve member for effecting said timed relation; and chuck means, coupled to said shaft, for holding a tool piece.