US3817663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reciprocating pump
Assignee: TECNO PROD CO
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Filing: 1971-11-15
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Granted: 1974-06-18
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Expires: 1991-11-15
Abstract
Abstract A reciprocating pump for liquids and adapted to quick conversion to double its pumping capacity with the addition of extra pumping cylinders. A rotary crankshaft operates through crossheads to drive pistons in the pumping cylinders, and a piston rod rigidly, but releasably, connects each piston and crosshead. Flexible bellows seal between each crosshead guide and piston rod to prevent loss of oil from the case around the piston rod to prevent any of the liquid pumped or outside dirt from reaching the case. The bellows also aid in the circulation of oil from the case to and around each crosshead and associated parts.
Inventors
- 👤 W Zehner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:46
CPC Classifications
F; F01; F01M; F01M1/00; F01M1/06; F04; F04B; F04B1/00; F04B53/00; F04B53/16; F04B53/162; F04B53/164
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
251 words
A reciprocating pump for liquids including a crank case, a crankshaft journalled in the crank case, a plurality of crossheads slidably journalled at one side of the crank case, a piston rod carried by each crosshead, a connecting rod between each crosshead and the crankshaft, sealing means between each piston rod and the crank case, a piston rigidly but removably secured on each piston rod, a cylinder surrounding eaCh piston, an intake valve for each cylinder, an intake manifold connecting to the upstream side of each intake valve, an outlet valve for each cylinder, and an outlet manifold connecting to the downstream side of each outlet valve; an individual sleeve for and slidably mounting each crosshead, and the sealing means between each piston rod and the crank case is a bellows secured at one end to the sleeve and at its other end to the piston rod; and the sleeve being formed with a channel to receive oil drippings from the inside of the crank case, the sleeve has an oil hole through it connected to the channel, and each crosshead and connecting rod have aligned oil holes periodically movable beneath the oil hole in the sleeve, a pin with surrounding bushing connects each crosshead to its connecting rod, and each crosshead has openings from the bushing towards the bellows whereby the bellows acts as a pump upon reciprocating movement of the crosshead to cause a continuous flow of oil around the pin, bushing, and between each crosshead and its sleeve.
Claim 2
Dependent Claim
251 words
A reciprocating pump for liquids including a crank case, a crankshaft journalled in the crank case, a plurality of crossheads slidably journalled at one side of the crank case, a piston rod carried by each crosshead, a connecting rod between each crosshead and the crankshaft, sealing means between each piston rod and the crank case, a piston rigidly but removably secured on each piston rod, a cylinder surrounding eaCh piston, an intake valve for each cylinder, an intake manifold connecting to the upstream side of each intake valve, an outlet valve for each cylinder, and an outlet manifold connecting to the downstream side of each outlet valve; an individual sleeve for and slidably mounting each crosshead, and the sealing means between each piston rod and the crank case is a bellows secured at one end to the sleeve and at its other end to the piston rod; and the sleeve being formed with a channel to receive oil drippings from the inside of the crank case, the sleeve has an oil hole through it connected to the channel, and each crosshead and connecting rod have aligned oil holes periodically movable beneath the oil hole in the sleeve, a pin with surrounding bushing connects each crosshead to its connecting rod, and each crosshead has openings from the bushing towards the bellows whereby the bellows acts as a pump upon reciprocating movement of the crosshead to cause a continuous flow of oil around the pin, bushing, and between each crosshead and its sleeve.
Claim 3
Dependent Claim
221 words
A reciprocating pump for liquids including a crank case, a crankshaft journalled in the crank case, a plurality of crossheads slidably journalled at one side of the crank case, a piston rod carried by each crosshead, a connecting rod between each crosshead and the crank shaft, sealing means between each piston rod and the crank case, a piston rigidly but removably secured on each piston rod, a cylinder surrounding each piston, an intake valve for each cylinder, an intake manifold connecting to the upstream side of each intake valve, an outlet valve for each cylinder, and an outlet manifold connecting to the downstream side of each outlet valve; and each said piston is rigidly but removably secured to its piston rod by means of a nut which is rotatable on the piston rod and screws into the piston skirt, each said piston rod having an annular groove therein with a beveled side thereon facing axially rearwardly, a diametrically split wedge ring with a surface complementary to said beveled side received in said groove with said surface and side being engaged, complementary means being provided on said wedge ring and the inner end of said nut to force part of said wedge ring against said piston by tightening said nut which also forces said wedge ring into engagement with said piston rod.
Claim 4
Dependent Claim
221 words
A reciprocating pump for liquids including a crank case, a crankshaft journalled in the crank case, a plurality of crossheads slidably journalled at one side of the crank case, a piston rod carried by each crosshead, a connecting rod between each crosshead and the crank shaft, sealing means between each piston rod and the crank case, a piston rigidly but removably secured on each piston rod, a cylinder surrounding each piston, an intake valve for each cylinder, an intake manifold connecting to the upstream side of each intake valve, an outlet valve for each cylinder, and an outlet manifold connecting to the downstream side of each outlet valve; and each said piston is rigidly but removably secured to its piston rod by means of a nut which is rotatable on the piston rod and screws into the piston skirt, each said piston rod having an annular groove therein with a beveled side thereon facing axially rearwardly, a diametrically split wedge ring with a surface complementary to said beveled side received in said groove with said surface and side being engaged, complementary means being provided on said wedge ring and the inner end of said nut to force part of said wedge ring against said piston by tightening said nut which also forces said wedge ring into engagement with said piston rod.
Claim 5
Dependent Claim
78 words
The combination defined in claim 9 wherein said complementary means including said wedge ring also having a second beveled surface facing axially rearwardly protruding radially of said groove, said nut having a split extension on its inner end beveled complementary to said second beveled surface and engaged therewith whereby tightening said nut forces said wedge ring into engagement with said piston rod and forces said extension out against said piston to lock said piston on its piston rod.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |