High efficiency hydraulic jack/air pump

Details High efficiency hydraulic jack/air pump High efficiency hydraulic jack/air pump

1987-03-10

1988-05-24

Watson, Robert C.

Implements or apparatus for applying pushing or pulling force

Fluid pressure

Vehicle attached

254 1, B66F 324

Patent

active

047460970

ABSTRACT:
An overload protected motor which drives a motor assembly to urge a connector rod up and down. The connector rod has two piston heads connected in line with each other, a large pneumatic piston head to pump air and a smaller hydraulic piston head to pump hydraulic fluid. The pneumatic head reciprocates in an air cylinder which has an air inlet and an air outlet. Both the inlet and the outlet have spring-loaded air stops which allow for one-way passage of air into and out of the air cylinder, respectively.

REFERENCES:
patent: 1983444 (1934-12-01), Dry
patent: 2034605 (1936-03-01), Carman
patent: 2313744 (1943-03-01), Hays
patent: 2420910 (1947-05-01), Richards
patent: 4052687 (1977-10-01), Kimball et al.
patent: 4219747 (1980-08-01), Hornvng et al.
patent: 4512151 (1985-04-01), Yamatani
patent: 4517541 (1985-05-01), Ubukata et al.
patent: 4598898 (1986-07-01), Hsu et al.
patent: 4923743 (1985-06-01), Wang

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