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US3625622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sensing means
Assignee: Individual
•
Filing: 1969-09-16
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Granted: 1971-12-07
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Expires: 1989-09-16
Abstract
Abstract Apparatus for sensing movement of a member by feeding fluid, such as air, displaced as a result of movement of the member, to the control input jet of a fluid logic device so that the fluid logic device switches at a predetermined speed of movement of the member. A drilling apparatus in which the bluntness of the drill is monitored by such a movement sensing apparatus is described. The drilling apparatus also includes means for providing a pecking motion to the drill head.
Inventors
- 👤 Alan T Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:08
CPC Classifications
F; F15; F15C; F15C1/00; F15C1/003; B; B23; B23Q; B23Q5/00; B23Q5/22; B23Q5/26; Y; Y10; Y10T; Y10T408/00; Y10T408/16; Y10T408/165; Y10T408/17; Y10T408/172
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
328 words
Apparatus including means for sensing movement of a member comprising means for sensing speed of flow of fluid displaced in consequence of movement of said member wherein means for sensing the speed of fluid flow comprises conduit means to feed at least part of said fluid to the control input jet of a fluid logic element, said element being arranged so as to switch at a predetermined speed of flow of said fluid, said member being in the piston of a piston and cylinder fluid ram device, the fluid displaced being a fluid displaced into or out of the cylinder as a result of relative movement between the piston and cylinder, the ram device being a double acting ram device and there being fluid supply means including a fluid pressure pilot operated supply valve means to supply fluid under pressure to the cylinder on one, forward, side of the piston to move the piston forward or to feed fluid under pressure to the cylinder on the other, return, side of the piston to return the piston, conduit means to feed at least part of the fluid displaced from the return side of the cylinder when the piston is moved forwardly, to the control input jet of said fluid logic element and said fluid logic element being connected to said supply valve means whereby said fluid logic element provides a first pilot signal to the valve means to cause the valve means to feed fluid to the forward side of the piston when the speed of flow of fluid from the cylinder on said return side of the piston exceeds a predetermined speed or provides a second pilot signal to the valve means to cause the valve means to stop feeding fluid to said one side of the piston and to feed fluid to the return side of the piston, when the speed of fluid flowing from said return side of the cylinder does not exceed a predetermined speed.
Claim 2
Dependent Claim
328 words
Apparatus including means for sensing movement of a member comprising means for sensing speed of flow of fluid displaced in consequence of movement of said member wherein means for sensing the speed of fluid flow comprises conduit means to feed at least part of said fluid to the control input jet of a fluid logic element, said element being arranged so as to switch at a predetermined speed of flow of said fluid, said member being in the piston of a piston and cylinder fluid ram device, the fluid displaced being a fluid displaced into or out of the cylinder as a result of relative movement between the piston and cylinder, the ram device being a double acting ram device and there being fluid supply means including a fluid pressure pilot operated supply valve means to supply fluid under pressure to the cylinder on one, forward, side of the piston to move the piston forward or to feed fluid under pressure to the cylinder on the other, return, side of the piston to return the piston, conduit means to feed at least part of the fluid displaced from the return side of the cylinder when the piston is moved forwardly, to the control input jet of said fluid logic element and said fluid logic element being connected to said supply valve means whereby said fluid logic element provides a first pilot signal to the valve means to cause the valve means to feed fluid to the forward side of the piston when the speed of flow of fluid from the cylinder on said return side of the piston exceeds a predetermined speed or provides a second pilot signal to the valve means to cause the valve means to stop feeding fluid to said one side of the piston and to feed fluid to the return side of the piston, when the speed of fluid flowing from said return side of the cylinder does not exceed a predetermined speed.
Claim 3
Dependent Claim
23 words
Apparatus according to claim 1 wherein the piston is connected to a drill head and provides the feed means for the drill head.
Claim 4
Dependent Claim
273 words
Apparatus according to claim 2, including a first reservoir for fluid under pressure, first control valve means to connect said first reservoir to a source of fluid under pressure or to said supply valve means to supply said first pilot signal thereto, a second reservoir for fluid under pressure, means controlled by said fluid logic element to feed fluid to said second reservoir during forward movement of the piston to build up fluid pressure therein during forward movement of the piston, second control valve means whereby when the pressure of the fluid in the second reservoir exceeds a predetermined pressure a signal is passed to said first control valve means to cause said first control valve means to connect said first reservoir to said source of fluid under pressure and wherein said fluid logic element, after a predetermined time of forward movement of the piston, is arranged to deliver said second pilot signal to said fluid supply valve means to cause said supply valve means to feed fluid under pressure to the cylinder to return the piston and to cause said second reservoir to be exhausted whereby the signal fed by said second control valve means to said first control valve means is removed and wherein there is a first mechanically operated valve actuated by the piston on return movement thereof, to cause a signal to be passed to said first control valve means to cause said first reservoir to be connected to said supply valve means to supply said first pilot signal means to cause said supply valve means to feed fluid under pressure to the cylinder to move the piston forward.
Claim 5
Dependent Claim
26 words
Apparatus according to claim 3 wherein the output from sad fluid logic element is connected to the control input jet of a second fluid logic element.
Claim 6
Dependent Claim
20 words
Apparatus according to claim 4 wherein the output of the second fluid logic element is fed to a step-up relay.
Claim 7
Dependent Claim
91 words
Apparatus according to claim 4 wherein a further conduit extends from the conduit to the control jet of the first fluid logic element, via first and second flow control valves to atmosphere and wherein the control input jet of a third fluid logic element is connected to said conduit between said first and second flow control valves and wherein said third fluid logic element is arranged to feed a signal to an exhaust valve to cause said exhaust valve to connect said conduit to the first fluid logic element to atmosphere.
Claim 8
Dependent Claim
27 words
Apparatus according to claim 6 wherein the output of said first fluid logic element is connected to the control input jet of a fourth fluid logic element.
Claim 9
Dependent Claim
20 words
Apparatus according to claim 7 wherein the output of said fourth fluid logic element is connected to a step-up relay.
Claim 10
Dependent Claim
33 words
Apparatus according to claim 3 wherein the period required to charge said second reservoir is adjustable by means of an adjustable flow control valve connected in the fluid supply means to the reservoir.
Claim 11
Dependent Claim
68 words
Apparatus according to claim 3 wherein a manually operable valve is provided and arranged to feed a pilot signal to a starting valve means, said starting valve means being arranged to connect a source of fluid under pressure to said first mechanically operated valve whereby on operation of said manually operated valve said starting valve means causes fluid under pressure to be fed to said mechanically operated valve.
Claim 12
Dependent Claim
67 words
Apparatus according to claim 10 wherein there is a second mechanically operated valve adapted to be actuated by the piston when the piston has caused movement of the drill head by a required amount to cause a pilot signal to be delivered to said third valve means to cause said starting valve means to disconnect said source of fluid under pressure from said first mechanically operated valve.
Claim 13
Dependent Claim
33 words
Apparatus according to claim 8 wherein the period required to charge said second reservoir is adjustable by means of an adjustable flow control valve connected in the fluid supply means to the reservoir.
Claim 14
Dependent Claim
68 words
Apparatus according to claim 12 wherein a manually operable valve is provided and arranged to feed a pilot signal to a starting valve means, said starting valve means being arranged to connect a source of fluid under pressure to said first mechanically operated valve whereby on operation of said manually operated valve said starting valve means causes fluid under pressure to be fed to said mechanically operated valve.
References Cited (Backward Citations)
US3151505A
Cited
US3396631A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |