US4902206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bellows pump
Assignee: HALUNA 12 MINAMIYAMABUSHI-CHO SHINJUKU-KU TOKYO JAPAN KK
•
Filing: 1988-09-30
•
Granted: 1990-02-20
•
Expires: 2008-09-30
Abstract
Abstract A bellows pump which is disclosed herein has two bellows made of a plastic material and provided with liquid inlet and outlet ports for transferring a liquid by expanding and contracting the bellows. The bellows pump comprises cylinder cases in each of which the bellows is vertically expandably and contractably contained and mounted at its access port side to a ceiling of said cylinder cases, gas pumping means for alternately feeding a compressed gas from a lower end thereof into the cylinder cases, a pair of rods passed through bottoms of the cylinder cases and fixed to the lower ends of the bellows, and adapted to be moved in response to the expansion and contraction of the bellows, and actuating means adapted to be operated in response to the up and down movement of the rods.
Inventors
- 👤 Takao Nakazawa
- 👤 Jisaburo Naito
- 👤 Hiroyuki Horiki
- 👤 Tutomu Kawashima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:19
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/08; F04B43/10; F04B43/113; F04B43/1136
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
137 words
A bellows pump having two bellows made of a plastic material and provided with liquid inlet and outlet ports for transferring a liquid by expanding and contracting the bellows, comprising: cylinder cases set in parallal in each of which the bellows is vertically expandably and contractably contained and mounted at its access port side to a ceiling of said cylinder case; gas pumping means for alternately feeding a compressed gas from lower ends thereof into said cylinder cases; a pair of rods passed through bottoms of the cylinder cases and fixed to the lower ends of the bellows, and adapted to be moved in response to the expansion and contraction of said bellows, and actuating means for alternating said gas pumping means adapted to be operated in response to the up and down movement of said rods.
Claim 2
Dependent Claim
137 words
A bellows pump having two bellows made of a plastic material and provided with liquid inlet and outlet ports for transferring a liquid by expanding and contracting the bellows, comprising: cylinder cases set in parallal in each of which the bellows is vertically expandably and contractably contained and mounted at its access port side to a ceiling of said cylinder case; gas pumping means for alternately feeding a compressed gas from lower ends thereof into said cylinder cases; a pair of rods passed through bottoms of the cylinder cases and fixed to the lower ends of the bellows, and adapted to be moved in response to the expansion and contraction of said bellows, and actuating means for alternating said gas pumping means adapted to be operated in response to the up and down movement of said rods.
Claim 3
Dependent Claim
53 words
A bellows pump according to claim 1, wherein said actuating means is constructed so that the lower ends of the rods reciprocate in such a manner that, when the compressed gas is fed into one of said cylinder cases to contract said bellows, the other cylinder case is expanded in an interlocking manner.
Claim 4
Dependent Claim
36 words
A bellows pump according to claim 2, wherein said actuating means comprises a drum pivotally mounted, and a belt passed around said drum and connected at its opposite ends to the lower ends of said rods.
Claim 5
Dependent Claim
37 words
A bellows pump according to claim 1, wherein said actuating means actuates said gas pumping means in response to the up and down movement of said rods to feed the compressed gas alternately into said cylinder cases.
Claim 6
Dependent Claim
37 words
A bellows pump according to claim 2, wherein said actuating means actuates said gas pumping means in response to the up and down movement of said rods to feed the compressed gas alternately into said cylinder cases.
References Cited (Backward Citations)
US2613607A
Cited
US2951450A
Cited
US3751988A
Cited
US4090818A
Cited
JPS58170866A
Cited
US4488592A
Cited
JPS60206987A
Cited
US4836756A
Cited
US4832580A
Cited
JPH06259781A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-02-19 | 1993-08-21 | 1994-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-19 | 1997-08-21 | 1998-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-19 | 2001-08-21 | 2002-02-20 | $7700.00 | Window Closed / Lapsed |