Fluid handling – Inflatable article – With coupling means
Reexamination Certificate
2000-05-08
2001-04-24
Rivell, John (Department: 3753)
Fluid handling
Inflatable article
With coupling means
C137S223000, C137S270000
Reexamination Certificate
active
06220273
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a pumping device, and more particularly to a pumping device that includes a pivotal switch member for various valves without the need of visual discrimination of the types of the valves.
2. Description of the Related Art
Various pumping devices have heretofore been provided for inflating bicycle tires. Since there are many kinds of valves for bicycle tires, e.g., French valve, Japanese valve, and American valve, a so-called “double head” type pump with a switch means have been proposed to be used on these different valves. Nevertheless, the conventional pumping devices generally have complicated structures and require troublesome operation to suit different valves. U.S. Pat. No. 5,819,781 to Wu issued on Oct. 13, 1998 discloses a pumping device with a pivotal lever for various valves that can be successfully used on different valves, yet troublesome operation of the pivotal lever is still required. The present invention is intended to provide a pumping device that can be used without the need of visual discrimination of the types of the valves to be inflated.
SUMMARY OF THE INVENTION
It is a primary object of the present invention to provide a pumping device that has a pivotal switch member for various valves without visual discrimination of the types of the valves to be inflated.
A pumping device in accordance with the present invention comprises:
a main body having a passage defined therein through which air passes,
a head including a first end and a second end, the second end of the head being communicated with the passage,
a pivotal switch member including a hollow cam seat and a lever extending from the cam seat to move therewith, the cam seat being rotatably received in the first end of the head, the cam seat including a central rotating axis relative to the first end of the head, the lever being extended beyond the head for manual operation, the cam seat including a first side with a first opening and a second side with a second opening communicated with the first opening, a distance from the central rotating axis of the cam seat to the first side being smaller than a distance from the central rotating axis of the cam seat to the second side,
a retainer slidably received in the head and including a first compartment therein, a first end, and a second end, the second end of the retainer including a conical recess defined therein, a spring being mounted in the first compartment, a nozzle being slidably mounted in the second end of the retainer and including a first end attached to the spring and a second end, a pin being slidably mounted in the retainer and including a first end extended beyond the first end of the retainer and a second end secured to the nozzle to slide therewith,
the second opening of the cam seat being sized to be smaller than the first end of the pin to prevent the first end of the pin from passing through the second opening, the first opening of the cam seat being sized to be larger that the first end of the pin to allow the first end of the pin to pass through, and
a nozzle head securely mounted in the second end of the head and including a second compartment communicated with the first compartment via the nozzle, the nozzle head including a hollow conical section for engaging with the conical recess of the retainer.
In an embodiment of the invention, the retainer includes a transverse hole for communicating the first compartment of the retainer and the passage of the main body. The pin includes a second transverse hole communicated with the first-mentioned transverse hole via the first compartment of the retainer. The pin further includes an axial hole that communicates the second transverse hole with the second end of the nozzle.
The passage of the main body may include a check valve mounted therein such that air is only flowable from the passage to the first compartment.
An outer cap is securely mounted to the second end of the head to secure the nozzle head in position. The outer cap includes an opening communicated with the second compartment of the nozzle head.
Other objects, advantages, and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
REFERENCES:
patent: 4276898 (1981-07-01), Ross
patent: 5379796 (1995-01-01), Wang
patent: 5683234 (1997-11-01), Chuang et al.
patent: 5762095 (1998-06-01), Gapinski et al.
patent: 5819781 (1998-10-01), Wu
patent: 5960815 (1999-10-01), Wang
patent: 5975109 (1999-11-01), Wu
patent: 6076544 (2000-06-01), Pierce
patent: 6102063 (2000-08-01), Pierce et al.
patent: 6105600 (2000-08-01), Wang
patent: 6105601 (2000-08-01), Wang
patent: 6146116 (2000-11-01), Wu et al.
Kamrath Alan
Rider Bennett Egan & Arundel, LLP.
Rivell John
Schoenfeld Meredith H
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