Patent US3744291A successfully refreshed from Google Patents.
US3744291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic hole piercing apparatus
Assignee: Vantage Tool Inc
•
Filing: 1971-06-17
•
Granted: 1973-07-10
•
Expires: 1991-06-17
Abstract
Abstract A pneumatically driven hole piercing apparatus is disclosed having an internally located valve actuator directly connected to the piercing tool to enable the air valve to be triggered by the tool. The hole piercing apparatus comprises a hollow cylindrical body having a threaded piercing tool movably mounted within the forward end thereof. An axially movable piston is located within the body and is adapted to strike the enclosed end of the piercing tool upon the admission of the piston motive fluid through a valve located at the rearward end of the body. A valve rod is also located within the body and is adapted to slidably extend through the piston for interconnecting the piercing tool with the valve. Upon a rearward movement of the piercing tool, the valve rod is moved rearwardly to unseat the valve. The motive fluid then enters the chamber within the body to urge the piston forwardly to strike the piercing tool and move it in the forward direction.
Inventors
- 👤 W Hagerty
- 👤 T Hunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:29
CPC Classifications
B; B21; B21D; B21D31/00; B21D31/02; B21D1/00; B21D1/06; Y; Y10; Y10S; Y10S72/00; Y10S72/705; Y10T; Y10T83/00; Y10T83/929; Y10T83/9314
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
147 words
Apparatus for removing dents from an object comprising: a hollow body member having a forward and a rearward end; a piercing member, adapted to pierce the object and remain fixed in the object, movably mounted at the forward end of the body member; a piston member slidably mounted in the body and adapted to transfer energy to the piercing member for penetrating the object; valve means for admitting a quantity of motive fluid therethrough into the body member whereby the piston member is energized to move through the body member towards the piercing member; valve actuating means responsive to only the movement of the piercing member for controlling the valve means; means for automatically returning the piston member to an initial operative position when the valve means is closed; and means for exerting force on the object through the piercing member whereby the dent can be removed.
Claim 2
Dependent Claim
147 words
Apparatus for removing dents from an object comprising: a hollow body member having a forward and a rearward end; a piercing member, adapted to pierce the object and remain fixed in the object, movably mounted at the forward end of the body member; a piston member slidably mounted in the body and adapted to transfer energy to the piercing member for penetrating the object; valve means for admitting a quantity of motive fluid therethrough into the body member whereby the piston member is energized to move through the body member towards the piercing member; valve actuating means responsive to only the movement of the piercing member for controlling the valve means; means for automatically returning the piston member to an initial operative position when the valve means is closed; and means for exerting force on the object through the piercing member whereby the dent can be removed.
Claim 3
Dependent Claim
31 words
Apparatus as in claim 1 wherein the valve actuating means further includes a connecting member movably mounted within the body member and extending between the valve means and the piercing member.
Claim 4
Dependent Claim
47 words
Apparatus as in claim 1 wherein said valve actuating means further includes a valve rod interconnecting the piercing member with the valve means whereby any relative movement between the piercing member and the body member will actuate the valve means to admit the quantity of motive fluid.
Claim 5
Dependent Claim
18 words
Apparatus as in claim 3 wherein the valve rod is located within the interior of the body member.
Claim 6
Dependent Claim
18 words
Apparatus as in claim 4 wherein the piston member has a front face for striking the piercing member.
Claim 7
Dependent Claim
20 words
Apparatus as in claim 5 wherein the valve rod extends through a bore formed along the length of said piston.
Claim 8
Dependent Claim
23 words
Apparatus as in claim 6 further including a return spring biasly positioned within the body member between the piston and the piercing member.
Claim 9
Dependent Claim
30 words
Apparatus as in claim 6 wherein the valve means comprises a valve face adapted to be seated on a valve seat formed within the rearward end of the body member.
Claim 10
Dependent Claim
22 words
Apparatus as in claim 8 wherein the valve means further includes a valve stem having a bore for receiving the valve rod.
Claim 11
Dependent Claim
27 words
Apparatus as in claim 2 wherein the connecting member extends through the piston member, the piston member having a bore for permitting passage of the connecting member.
Claim 12
Dependent Claim
14 words
Apparatus as in claim 1 wherein the point of the piercing member is threaded.
Claim 13
Dependent Claim
18 words
Apparatus as in claim 11 wherein the piercing member is keyed against relative rotation with the body member.
Claim 14
Dependent Claim
43 words
Apparatus as in claim 11 wherein the means for exerting force includes a weighted slide hammer slidably mounted on the exterior of the body member, the slide hammer adapted to impact an abutting portion formed on the rearward end of the body member.
Claim 15
Dependent Claim
26 words
Apparatus as in claim 13 further comprising means on the forward ends of the body member and the slide hammer for rotating the body member manually.
Claim 16
Dependent Claim
42 words
Apparatus as in claim 14 wherein the rotating means comprises the forward end of the body member having an enlarged portion and the forward end of the slide hammer having a cavity for matingly receiving the enlarged portion of the body member.
Claim 17
Dependent Claim
21 words
Apparatus as in claim 15 further including a compression spring anchored to the body member and biased against the piercing member.
Claim 18
Dependent Claim
27 words
Apparatus as in claim 16 wherein the piston further comprises rear face means for striking and actuating the valve means during the return cycle of the piston.
Claim 19
Dependent Claim
172 words
A contact activated automatic hole piercing apparatus comprising: a hollow body member having a forward and a rearward end; a piercing member, for piercing an object, movably mounted at the forward end of the body member; a piston member slidably mounted in the central portion of the body member and adapted to transfer energy to piercing member for penetrating the object; valve means within the rearward end of the body member for admitting a quantity of motive fluid therethrough into the body member whereby the piston member is energized to move through the body member towards the piercing member; valve actuating means within the body member responsive only to movement of the piercing member for controlling the valve means and including a connecting member movably mounted within the body member and extending between the valve means and the piercing member; and means for automatically returning the piston member to an initial operative position when the valve means is closed whereby the apparatus is activated only upon contact movement of the piercing member.
Claim 20
Dependent Claim
172 words
A contact activated automatic hole piercing apparatus comprising: a hollow body member having a forward and a rearward end; a piercing member, for piercing an object, movably mounted at the forward end of the body member; a piston member slidably mounted in the central portion of the body member and adapted to transfer energy to piercing member for penetrating the object; valve means within the rearward end of the body member for admitting a quantity of motive fluid therethrough into the body member whereby the piston member is energized to move through the body member towards the piercing member; valve actuating means within the body member responsive only to movement of the piercing member for controlling the valve means and including a connecting member movably mounted within the body member and extending between the valve means and the piercing member; and means for automatically returning the piston member to an initial operative position when the valve means is closed whereby the apparatus is activated only upon contact movement of the piercing member.
Claim 21
Dependent Claim
38 words
Apparatus as in claim 18 further including a weighted slide hammer slidably mounted on the exterior of the body member, the slide hammer adapted to impact an abutting portion formed on the rearward end of the body member.
Claim 22
Dependent Claim
26 words
Apparatus as in claim 19 further comprising means on the forward ends of the body member and the slide hammer for rotating the body member manually.
Claim 23
Dependent Claim
42 words
Apparatus as in claim 20 wherein the rotating means comprises the forward end of the body member having an enlarged portion and the forward end of the slide hammer having a cavity for matingly receiving the enlarged portion of the body member.
Claim 24
Dependent Claim
18 words
Apparatus as in claim 18 wherein the piercing member is keyed against relative rotation with the body member.
Claim 25
Dependent Claim
25 words
Apparatus as in claim 18 wherein the connecting member is a valve rod that extends through a bore formed along the length of the piston.
Claim 26
Dependent Claim
23 words
Apparatus as in claim 23 further including a return spring biasly positioned within the body member between the piston and the piercIng member.
Claim 27
Dependent Claim
31 words
Apparatus as in claim 24 wherein the valve means further includes a valve face adapted to be seated on a valve seat formed within the rearward end of the body member.
References Cited (Backward Citations)
US1792888A
Cited
US2605808A
Cited
US2787178A
Cited
US2791926A
Cited
US3030837A
Cited
US3392792A
Cited
US3483727A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |