1987-09-21
1989-05-23
Apley, Richard J.
Undertaking
A63B 2100
Patent
active
048323357
ABSTRACT:
An exercise air pump is an exercise equipment of compression/expansion action capable of variable resistant force by means of generated air pressure/partial vacuum. The exercise air pump includes a tubular casing construction with a cap which allows for the entrance and retainment of a hollow plunger unit with an exchangeable rubber stopper which contains a central exhaust hole which is of variable sizes.
REFERENCES:
patent: 767008 (1904-08-01), Pelletier et al.
patent: 2825563 (1958-03-01), Lawton
patent: 3471145 (1969-10-01), Berger
patent: 4290599 (1981-09-01), Berger
Apley Richard J.
Welsh J.
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