US3920084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extendable and retractible material delivery devices
Assignee: Individual
•
Filing: 1974-09-05
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Granted: 1975-11-18
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Expires: 1994-09-05
Abstract
Abstract An extendible and retractible boom or conduit comprises a number of shaft or boom members on a common longitudinal axis, each except the outermost member being telescoped within the one next adjacent. Each telescoped member has a piston slidably sealed to the inner wall of the next adjacent outer member to form a series of tandem-arranged sealed pistons. Fluid passageways are provided between adjacent shaft members so that fluid supplied under pressure to a port of the device flows through the passageways to all the piston heads, thereby extending the telescoped shaft members and at the same time driving fluid out from under each piston through fluid passageways to another port of the device. When the pressurized fluid flow is reversed to send pressurized fluid to the under sides of the pistons, the telescoped members are retracted and fluid above the pistons is driven out through the first-mentioned port. A conduit for conveying fluid or other material enters the device above the piston heads and tubular members attached to one or more of the pistons move with the pistons to effectively extend the length of the conveying conduit when the piston members are extended. Thus, the material or fluid can be ejected from the delivery end regardless of the length of extension of the device. In another embodiment, a second material or fluid conveying conduit, also extendible and retractible with the extension and retraction of the device, is adapted to retrieve the material or fluid delivered through the other conduit, such as for example in the case of earth drilling or well drilling operations where fluid may be forced down to the drilling member and then retracted and recirculated.
Inventors
- 👤 Jr Wayne B Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:01
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/02; E21B17/04; E21B17/07; E21B3/00; E21B3/02; E21B3/04; F; F15; F15B; F15B15/00; F15B15/08; F15B15/14; F15B15/16; F15B15/20; F15B15/22; F15B15/224
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
231 words
In an extendible and contractible shaft having a plurality of shaft members having a common longitudinal axis and each, except the outermost shaft member, being telescoped within the one next adjacent, each telescoped shaft member having a piston slidably sealed to the inner wall of the next adjacent outer shaft member to form a series of tendem-arranged sealed pistons, closure means at the end of said outermost shaft member which the pistons approach when the shaft is coNtracting, fluid passageways between adjacent shaft members, means providing fluid communication between adjacent fluid passageways, a first port means communicating with one side of said piston seals and a second port means communicating with the opposite side of said piston seals, whereby application of fluid pressure at said first port means extends the length of said shaft and application of fluid pressure at said second port means contracts the length of said shaft, the improvement comprising: material conveying conduit means comprising a first material conveying tubular conduit section within said shaft and fixed relative to said outermost shaft member and communicating with the exterior of said shaft through said closure means, a second material conveying tubular conduit section slidably sealed to said first material conveying conduit section so that the conduit means is thereby extendible; and opening means at the end of the shaft opposite the closure means providing communication with the conduit means.
Claim 2
Dependent Claim
231 words
In an extendible and contractible shaft having a plurality of shaft members having a common longitudinal axis and each, except the outermost shaft member, being telescoped within the one next adjacent, each telescoped shaft member having a piston slidably sealed to the inner wall of the next adjacent outer shaft member to form a series of tendem-arranged sealed pistons, closure means at the end of said outermost shaft member which the pistons approach when the shaft is coNtracting, fluid passageways between adjacent shaft members, means providing fluid communication between adjacent fluid passageways, a first port means communicating with one side of said piston seals and a second port means communicating with the opposite side of said piston seals, whereby application of fluid pressure at said first port means extends the length of said shaft and application of fluid pressure at said second port means contracts the length of said shaft, the improvement comprising: material conveying conduit means comprising a first material conveying tubular conduit section within said shaft and fixed relative to said outermost shaft member and communicating with the exterior of said shaft through said closure means, a second material conveying tubular conduit section slidably sealed to said first material conveying conduit section so that the conduit means is thereby extendible; and opening means at the end of the shaft opposite the closure means providing communication with the conduit means.
Claim 3
Dependent Claim
21 words
A shaft according to claim 1 in which the second material conveying conduit section is attached to one of said pistons.
Claim 4
Dependent Claim
41 words
A shaft according to claim 1 in which a third material conveying tubular conduit section is attached to a second of said pistons and is slidably sealed to the second material conveying conduit section, thereby making the conduit means further extendible.
Claim 5
Dependent Claim
23 words
A shaft according to claim 1 in which the first material conveying conduit section comprises a tubular member concentric with the longitudinal axis.
Claim 6
Dependent Claim
26 words
A shaft according to claim 1 in which the conduit means comprises an annular region between the first and second conduit sections concentric with the axis.
Claim 7
Dependent Claim
16 words
A shaft according to claim 5 in which the annular region surrounds said first conduit section.
Claim 8
Dependent Claim
21 words
A shaft according to claim 5 in which both of said conduit sections are fixed relative to said outermost shaft member.
Claim 9
Dependent Claim
24 words
A shaft according to claim 7 including a conduit member in communication with said first conduit section and attached to one of said pistons.
Claim 10
Dependent Claim
16 words
A shaft according to claim 1 which includes means for driving said shaft members in rotation.
Claim 11
Dependent Claim
16 words
A shaft according to claim 5 which includes means for driving said shaft members in rotation.
Claim 12
Dependent Claim
227 words
In an extendible and contractible shaft having a plurality of shaft members having a common longitudinal axis and each, except the outermost shaft member, being telescoped within the one next adjacent, each telescoped shaft member having a piston slidably sealed to the inner wall of the next adjacent outer shaft member to form a series of tandem-arranged sealed pistons, closure means at the end of said outermost shaft member which the pistons approach when the shaft is contracting, fluid passageways between adjacent shaft members, means providing fluid communication between adjacent fluid passageways, a first port means communicating with one side of said piston seals and a second port means communicating with the opposite side of said piston seals, whereby application of fluid pressure at said first port means extends the length of said shaft and application of fluid pressure at said second port means contracts the length of said shaft, the improvement comprising: first material conveying conduit means comprising a first material conveying tubular conduit section positioned to provide communication from the exterior of said shaft through said closure means to a position within said shaft, and fixed relative to said outermost shaft member, a second material conveying tubular conduit section movable longitudinally within said first conduit section and attached at its end opposite said closure means to a shaft member other than the outermost shaft member.
Claim 13
Dependent Claim
227 words
In an extendible and contractible shaft having a plurality of shaft members having a common longitudinal axis and each, except the outermost shaft member, being telescoped within the one next adjacent, each telescoped shaft member having a piston slidably sealed to the inner wall of the next adjacent outer shaft member to form a series of tandem-arranged sealed pistons, closure means at the end of said outermost shaft member which the pistons approach when the shaft is contracting, fluid passageways between adjacent shaft members, means providing fluid communication between adjacent fluid passageways, a first port means communicating with one side of said piston seals and a second port means communicating with the opposite side of said piston seals, whereby application of fluid pressure at said first port means extends the length of said shaft and application of fluid pressure at said second port means contracts the length of said shaft, the improvement comprising: first material conveying conduit means comprising a first material conveying tubular conduit section positioned to provide communication from the exterior of said shaft through said closure means to a position within said shaft, and fixed relative to said outermost shaft member, a second material conveying tubular conduit section movable longitudinally within said first conduit section and attached at its end opposite said closure means to a shaft member other than the outermost shaft member.
Claim 14
Dependent Claim
40 words
A shaft according to claim 11 in which said other shaft member is provided at its end opposite said closure means, with a sEcond closure means, said second closure means having an opening which communicates with said second conduit section.
Claim 15
Dependent Claim
36 words
A shaft according to claim 12 in which a third material conveying tubular conduit section is positioned between said first and second conduit sections and is slidably related to both said first and second conduit sections.
Claim 16
Dependent Claim
69 words
A shaft according to claim 11 which includes a second material conveying conduit means comprising a tubular member providing an annular conduit surrounding said first material conveying conduit means and being fixed to the outermost shaft member, the annular conduit communicating with the exterior of the shaft through the first mentioned closure means, said second closure means being provided with a second opening providing communication with said annular conduit.
Claim 17
Dependent Claim
30 words
A shaft according to claim 14 in which a shaft member surrounding said tubular member moves longitudinally relative to said annular conduit to extend the length of said annular conduit.
References Cited (Backward Citations)
US1626277A
Cited
US1908734A
Cited
US2288545A
Cited
US3180236A
Cited
US3603207A
Cited
US3610100A
Cited
US3696712A
Cited
US3768578A
Cited
US3797587A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |