Two-stage hand pump

Expansible chamber devices – Relatively movable working members

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C092S00600D, C417S487000

Reexamination Certificate

active

07353746

ABSTRACT:
A hand pump for inflating rafts or similar inflatables has a first piston with a relatively low pumping volume which is capable of pumping relatively small volumes of air into a raft as the raft becomes full and is approaching its maximum pressure, and a second piston with a larger pumping volume that can pump larger volumes of air into a raft when it is empty or only partially filled. Both pistons are operated with a single plunger. When the plunger is rotated in a first direction to a first position a locking mechanism allows it to operate only the first piston, and when the plunger is rotated in a second direction to a second position the locking mechanism allows it to operate only the second piston.

REFERENCES:
patent: 670811 (1901-03-01), Phelps
patent: 753530 (1904-03-01), Ten Eyck
patent: 3224378 (1965-12-01), Graham
patent: 5807078 (1998-09-01), Chen
patent: 5997256 (1999-12-01), Gunther
patent: 6135733 (2000-10-01), Wu
patent: 6257849 (2001-07-01), Wu
patent: 6299420 (2001-10-01), Saputo et al.
patent: 6325601 (2001-12-01), Wu
patent: 6676390 (2004-01-01), Wang
Brochure on K-Pump Models SK100 and K200.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Two-stage hand pump does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Two-stage hand pump, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Two-stage hand pump will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2796852

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.