US2346713A - Caltrop - Google Patents
Caltrop Download PDFInfo
- Publication number
- US2346713A US2346713A US462530A US46253042A US2346713A US 2346713 A US2346713 A US 2346713A US 462530 A US462530 A US 462530A US 46253042 A US46253042 A US 46253042A US 2346713 A US2346713 A US 2346713A
- Authority
- US
- United States
- Prior art keywords
- arms
- caltrop
- hollow
- atmosphere
- central body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
- F41H11/00—Defence installations; Defence devices
- F41H11/08—Barbed-wire obstacles; Barricades; Stanchions; Tank traps; Vehicle-impeding devices; Caltrops
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F13/00—Arrangements for obstructing or restricting traffic, e.g. gates, barricades ; Preventing passage of vehicles of selected category or dimensions
- E01F13/12—Arrangements for obstructing or restricting traffic, e.g. gates, barricades ; Preventing passage of vehicles of selected category or dimensions for forcibly arresting or disabling vehicles, e.g. spiked mats
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T152/00—Resilient tires and wheels
- Y10T152/10—Tires, resilient
- Y10T152/10279—Cushion
Definitions
- Patented pr. 18, i944 il Claims.
- 'I'his invention relates to an improved caltrop. to be used against enemy vehicles mounted on pneumatic tires.
- Websters Dictionary shows a caltrop or caltrap as a four-pointed body, the points being so arranged that, when any three of them are on the ground, the fourth sticks straight up from the ground surface; the dictionary points out that the device was used against enemy cavalry.
- Fig. 1 of the drawing shows a plan view of a caltrop made according to the invention.
- Fig. 2 is an elevational view of the device of Fig. 1.
- Fig. 3 is a view in section on line 3-3 of Fig. 1.
- Fig. 4 is an elevational view of a modied form of caltrop.
- Fig. 5 is a view in section similar to Fig. 3, but showing the modication of Fig. 4.
- the caltrop is shown as comprising a central body 2 having four hollow arms 4 equally spaced about the body.
- the spacing of the four arms is a relatively simple problem when it is remembered that these arms could be centered in the faces of an equilateral pyramid.
- the arms are thus spaced approximately 109.5 apart.
- the arms are hollow throughout their length, and the hollows of the various arms are interconnected by means of passages in the body 2.
- One of these passages is a straight-through bore 6. which serves to communicate the inner ends of all the hollow arms to atmosphere. ⁇
- arms d are shown as screwed into body 2.
- the central body 22 is made integral with the spaced act of March 3, amended April 30, 1928; 370 0. G.
- Arms 24 interconnect, as shown in Fig. 5, and body 22 is vented to atmosphere directly through passage 26.
- the arms d and 2t are preferably pointed. as shown by the oblique cut-oil indicated by 8 and 28.
- caltrops according to the invention can be scattered in large quantities from low-dying aircraft in areas which are likely to be traversed by enemy vehicles. So used, one of the devices in only one tire could stop or slow down a vehicle by completely deating that one tire.
- the device with screwed arms is especially useful in that it may be carried in quantities in the disassembled form and put together prior to use by scattering or deliberate planting. Thus, it may be readily carried in the pockets of members of a raiding party.
- a caltrop comprising a central body, hollow arms extending therefrom, and an opening communicating the hollows with the atmosphere.
- a hollow central body In a caltrop, a hollow central body, and a plurality of hollow arms secured to the central body and open to the atmosphere, each arm being pointed at its outer end.
- a puncturing object for ground sowing comprising interconnected hollow arms and open to the atmosphere diverging in spacial conguration.
- a puncturing object for ground sowing comprising interconnected hollow arms and open to the atmosphere diverging in spacial configuration and pointed outer ends on said arms.
- a caltrop comprising a plurality of hollow open end connected arms extending in diierent directions from their point of connection, the hollows in said arms being interconnectedeand open to the atmosphere.
- a caltrop comprising a connector portion having intercommunicating openings therethrough extending in different directions, and hollow open end tubes with their ends retained 1n said openings.
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Tires In General (AREA)
Description
B. WALKER Filed Oct. 19, 1942 'lill 3mm/wo@ Emu clk@ WnlKEP atto/Wx April 18, 1944.
Patented pr. 18, i944 il Claims.
(Granted under the The invention described herein may be manufactured and used by or for the Government for governmental purposes, without the payment to me of any royalty thereon.
'I'his invention relates to an improved caltrop. to be used against enemy vehicles mounted on pneumatic tires.
Websters Dictionary shows a caltrop or caltrap as a four-pointed body, the points being so arranged that, when any three of them are on the ground, the fourth sticks straight up from the ground surface; the dictionary points out that the device was used against enemy cavalry.
The cavalry of modern war is much less easily affected by the old style caltrop for, even though a pointed instrument pierce a tire wall, it will not necessarily stop the progress of the vehicle, nor will it even materially impede that progress. The reason is that self-sealing tires may substantially eliminate the effectiveness of simple punctures. It therefore becomes necessary to not only puncture the tire, but also to let the air out. Clearly, the ancient form of caltrop was called on for no such purposes.
It is therefore the object of this invention to provide a caltrop which will be effective in retarding the advance of military vehicles which run on pneumatic pressure tires. This is accomplished by a caltrop having hollow arms.
The specic nature of the invention as well as other objects and advantages thereof will clearly appear from a description of a preferred embodiment as shown in the accompanying drawing in which:
Fig. 1 of the drawing shows a plan view of a caltrop made according to the invention.
Fig. 2 is an elevational view of the device of Fig. 1.
Fig. 3 is a view in section on line 3-3 of Fig. 1.
Fig. 4 is an elevational view of a modied form of caltrop.
Fig. 5 is a view in section similar to Fig. 3, but showing the modication of Fig. 4.
Referring to the drawing in detail, the caltrop is shown as comprising a central body 2 having four hollow arms 4 equally spaced about the body. The spacing of the four arms is a relatively simple problem when it is remembered that these arms could be centered in the faces of an equilateral pyramid. The arms are thus spaced approximately 109.5 apart. As can be seen in Fig. 8, the arms are hollow throughout their length, and the hollows of the various arms are interconnected by means of passages in the body 2. One of these passages is a straight-through bore 6. which serves to communicate the inner ends of all the hollow arms to atmosphere.` In this iirst embodiment shown in Figs. 1 to 3. arms d are shown as screwed into body 2.
In the embodiment shown in Figs. 4 and 5, the central body 22 is made integral with the spaced act of March 3, amended April 30, 1928; 370 0. G.
The arms d and 2t are preferably pointed. as shown by the oblique cut-oil indicated by 8 and 28.
In use, caltrops according to the invention can be scattered in large quantities from low-dying aircraft in areas which are likely to be traversed by enemy vehicles. So used, one of the devices in only one tire could stop or slow down a vehicle by completely deating that one tire.
The device with screwed arms is especially useful in that it may be carried in quantities in the disassembled form and put together prior to use by scattering or deliberate planting. Thus, it may be readily carried in the pockets of members of a raiding party.
While the preferred caltrop shown is of the classical form with four symmetric arms, it will be understood that the particular coniguration is not a limiting factor and other forms of the device may be used that carry out the novel concept of providing hollow members for passage of air or other iuid.
I claim:
1. A caltrop comprising a central body, hollow arms extending therefrom, and an opening communicating the hollows with the atmosphere.
2. In a caltrop, a hollow central body, and a plurality of hollow arms secured to the central body and open to the atmosphere, each arm being pointed at its outer end.
3. The invention as in claim 2, in which the hollows of the various arms are interconnected through the central body.
4. A puncturing object for ground sowing comprising interconnected hollow arms and open to the atmosphere diverging in spacial conguration.
5. A puncturing object for ground sowing comprising interconnected hollow arms and open to the atmosphere diverging in spacial configuration and pointed outer ends on said arms.
6. A caltrop comprising a plurality of hollow open end connected arms extending in diierent directions from their point of connection, the hollows in said arms being interconnectedeand open to the atmosphere.
7. In ention of claim 6 characterized in that arms h' ve chamfered outer ends to facilitate entry into the air space of an inflated body.
8. A caltrop comprising a connector portion having intercommunicating openings therethrough extending in different directions, and hollow open end tubes with their ends retained 1n said openings.
9. The invention that the tubes are the connector.
of claim 8, characterized in threaded into the openings in
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US462530A US2346713A (en) | 1942-10-19 | 1942-10-19 | Caltrop |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US462530A US2346713A (en) | 1942-10-19 | 1942-10-19 | Caltrop |
Publications (1)
Publication Number | Publication Date |
---|---|
US2346713A true US2346713A (en) | 1944-04-18 |
Family
ID=23836775
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US462530A Expired - Lifetime US2346713A (en) | 1942-10-19 | 1942-10-19 | Caltrop |
Country Status (1)
Country | Link |
---|---|
US (1) | US2346713A (en) |
Cited By (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3020617A (en) * | 1960-03-07 | 1962-02-13 | Dopera Rudolph | Supports for ceramic ware |
US3387824A (en) * | 1967-03-03 | 1968-06-11 | Gen Dynamics Corp | Interdiction device |
US3652059A (en) * | 1970-07-17 | 1972-03-28 | Earl E Groblebe | Tire puncturing device to impede movement of a vehicle |
US3961773A (en) * | 1975-07-14 | 1976-06-08 | Faulkner Max L | Traction device |
US4055104A (en) * | 1976-03-29 | 1977-10-25 | Mcdonnell Douglas Corporation | Tire piercing munition |
US4473948A (en) * | 1982-09-13 | 1984-10-02 | Chadwick Thomas L | Tire puncturing device |
US5328292A (en) * | 1993-03-11 | 1994-07-12 | Williams Francis R | Traffic barrier chain |
US5330285A (en) * | 1993-01-28 | 1994-07-19 | Stop-Stick, Inc. | Apparatus for deflating tires of moving vehicles |
US5452962A (en) * | 1993-01-28 | 1995-09-26 | Stop Stick, Inc. | Apparatus for deflating tires of moving vehicles |
US5820293A (en) * | 1996-10-11 | 1998-10-13 | Stop Stick, Ltd. | Vehicle tire deflation device |
US5921703A (en) * | 1997-06-25 | 1999-07-13 | Becker; Jonathan B. | Caltrop |
US6155745A (en) * | 1998-06-04 | 2000-12-05 | Stop Stick, Ltd. | Vehicle tire deflation device |
US6709190B1 (en) * | 2002-09-16 | 2004-03-23 | James O. Partin | Double-cross barricade |
DE102007025480A1 (en) * | 2007-05-31 | 2008-12-04 | Bundesrepublik Deutschland, vertreten durch das Bundesministerium der Verteidigung, vertreten durch das Bundesamt für Wehrtechnik und Beschaffung | Defensive weapon, especially crow's foot, has tetrahedral shape when ready for use with corners of flexurally stiff points and can be dismantled at interface into three triangular individual parts for transportation |
DE102007060506B3 (en) * | 2007-12-15 | 2009-04-30 | Rheinmetall Landsysteme Gmbh | Locking body against wheels vehicles |
US8231303B1 (en) | 2009-08-27 | 2012-07-31 | Plasticomp, Inc. | Road spikes with improved characteristics and methods of deployment |
CN103572718A (en) * | 2012-07-30 | 2014-02-12 | 凌怀宇 | Square-core puncturing device capable of being thrown about |
US20140119825A1 (en) * | 2008-10-06 | 2014-05-01 | Pacific Scientific Energetic Materials Company (Arizona), Llc | Apparatus And Method For Rapidly Deflating Tires To Disable A Land Vehicle |
US8858113B1 (en) | 2014-01-23 | 2014-10-14 | Leonard Jon Bettendorf | Tire deflation device for puncturing one or more tires of a fleeing vehicle |
USD780882S1 (en) * | 2015-06-17 | 2017-03-07 | Robert Rea Barker | Tire puncturing device |
RU174311U1 (en) * | 2017-06-29 | 2017-10-11 | Общество с ограниченной ответственностью "Дизфор" | PROTECTIVE BLOCKER BARRIER |
US10301786B2 (en) | 2015-03-23 | 2019-05-28 | Pacific Scientific Energetic Materials Company (California) LLC | Deployable device having an unrolled configuration for rapid, bi-directional immobilization of a targeted vehicle traveling on a roadway, and associated methods |
US10408557B2 (en) | 2016-10-13 | 2019-09-10 | Stop Stick, Ltd. | Vehicular tire deflation device and propulsion unit for vehicular tire deflation device |
CZ308333B6 (en) * | 2019-03-25 | 2020-05-20 | České vysoké učenà technické v Praze | Mobile barrier for slowing and / or stopping and / or preventing vehicle entry |
DE102022002642A1 (en) | 2022-07-19 | 2024-01-25 | Eberhard Kübel & Frank Strobel GbR (vertretungsberechtigter Gesellschafter: Eberhard Kübel, 96472 Rödental) | Crow's feet |
-
1942
- 1942-10-19 US US462530A patent/US2346713A/en not_active Expired - Lifetime
Cited By (31)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3020617A (en) * | 1960-03-07 | 1962-02-13 | Dopera Rudolph | Supports for ceramic ware |
US3387824A (en) * | 1967-03-03 | 1968-06-11 | Gen Dynamics Corp | Interdiction device |
US3652059A (en) * | 1970-07-17 | 1972-03-28 | Earl E Groblebe | Tire puncturing device to impede movement of a vehicle |
US3961773A (en) * | 1975-07-14 | 1976-06-08 | Faulkner Max L | Traction device |
US4055104A (en) * | 1976-03-29 | 1977-10-25 | Mcdonnell Douglas Corporation | Tire piercing munition |
US4473948A (en) * | 1982-09-13 | 1984-10-02 | Chadwick Thomas L | Tire puncturing device |
US5452962A (en) * | 1993-01-28 | 1995-09-26 | Stop Stick, Inc. | Apparatus for deflating tires of moving vehicles |
US5330285A (en) * | 1993-01-28 | 1994-07-19 | Stop-Stick, Inc. | Apparatus for deflating tires of moving vehicles |
US5328292A (en) * | 1993-03-11 | 1994-07-12 | Williams Francis R | Traffic barrier chain |
US5820293A (en) * | 1996-10-11 | 1998-10-13 | Stop Stick, Ltd. | Vehicle tire deflation device |
US5921703A (en) * | 1997-06-25 | 1999-07-13 | Becker; Jonathan B. | Caltrop |
US6155745A (en) * | 1998-06-04 | 2000-12-05 | Stop Stick, Ltd. | Vehicle tire deflation device |
US6709190B1 (en) * | 2002-09-16 | 2004-03-23 | James O. Partin | Double-cross barricade |
DE102007025480A1 (en) * | 2007-05-31 | 2008-12-04 | Bundesrepublik Deutschland, vertreten durch das Bundesministerium der Verteidigung, vertreten durch das Bundesamt für Wehrtechnik und Beschaffung | Defensive weapon, especially crow's foot, has tetrahedral shape when ready for use with corners of flexurally stiff points and can be dismantled at interface into three triangular individual parts for transportation |
DE102007060506B3 (en) * | 2007-12-15 | 2009-04-30 | Rheinmetall Landsysteme Gmbh | Locking body against wheels vehicles |
US20090162142A1 (en) * | 2007-12-15 | 2009-06-25 | Rheinmetall Landsysteme Gmbh | Blocking bodies against vehicles having wheels |
US7946785B2 (en) | 2007-12-15 | 2011-05-24 | Rheinmetall Landsysteme Gmbh | Blocking bodies against vehicles having wheels |
EP2071082A2 (en) | 2007-12-15 | 2009-06-17 | Rheinmetall Landsysteme GmbH | Retaining element for vehicles with wheels |
US9340935B2 (en) | 2008-10-06 | 2016-05-17 | Pacific Scientific Energetic Materials Company (Arizona) LLC | Apparatus and method for rapidly deflating tires to disable a land vehicle |
US20140119825A1 (en) * | 2008-10-06 | 2014-05-01 | Pacific Scientific Energetic Materials Company (Arizona), Llc | Apparatus And Method For Rapidly Deflating Tires To Disable A Land Vehicle |
US9714492B2 (en) | 2008-10-06 | 2017-07-25 | Pacific Scientific Energetic Materials Company (Arizona) LLC | Apparatus and method for rapidly deflating tires to disable a land vehicle |
US9103082B2 (en) * | 2008-10-06 | 2015-08-11 | Pacific Scientific Energetic Materials Company (Arizona) LLC | Apparatus and method for rapidly deflating tires to disable a land vehicle |
US8231303B1 (en) | 2009-08-27 | 2012-07-31 | Plasticomp, Inc. | Road spikes with improved characteristics and methods of deployment |
CN103572718A (en) * | 2012-07-30 | 2014-02-12 | 凌怀宇 | Square-core puncturing device capable of being thrown about |
US8858113B1 (en) | 2014-01-23 | 2014-10-14 | Leonard Jon Bettendorf | Tire deflation device for puncturing one or more tires of a fleeing vehicle |
US10301786B2 (en) | 2015-03-23 | 2019-05-28 | Pacific Scientific Energetic Materials Company (California) LLC | Deployable device having an unrolled configuration for rapid, bi-directional immobilization of a targeted vehicle traveling on a roadway, and associated methods |
USD780882S1 (en) * | 2015-06-17 | 2017-03-07 | Robert Rea Barker | Tire puncturing device |
US10408557B2 (en) | 2016-10-13 | 2019-09-10 | Stop Stick, Ltd. | Vehicular tire deflation device and propulsion unit for vehicular tire deflation device |
RU174311U1 (en) * | 2017-06-29 | 2017-10-11 | Общество с ограниченной ответственностью "Дизфор" | PROTECTIVE BLOCKER BARRIER |
CZ308333B6 (en) * | 2019-03-25 | 2020-05-20 | České vysoké učenà technické v Praze | Mobile barrier for slowing and / or stopping and / or preventing vehicle entry |
DE102022002642A1 (en) | 2022-07-19 | 2024-01-25 | Eberhard Kübel & Frank Strobel GbR (vertretungsberechtigter Gesellschafter: Eberhard Kübel, 96472 Rödental) | Crow's feet |
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