Patent US3897894A successfully refreshed from Google Patents.
US3897894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pack frame top bracket
Assignee: Browning Arms Co
•
Filing: 1974-01-14
•
Granted: 1975-08-05
•
Expires: 1994-01-14
Abstract
Abstract A top bracket, preferably formed of a continuous tubular member, may be attached to the top of a tubular pack frame to form an extension of the frame. The structure extends the length of the frame and also projects laterally either rearwardly or forwardly of the frame in the form of a shelf or framework for lashing either loads or a shelter from the elements.
Inventors
- 👤 John S Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:26
CPC Classifications
A; A45; A45F; A45F3/00; A45F3/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
182 words
In a backpack frame for hikers having at least two spaced, upright coplaner side supports, the improvement which comprises a top shelf extension formed from: a pair of side extension members of approximately equal length, each of which carries releasable means to connect the lower portion thereof in longitudinally adjustable relationship to the upper portion of either of said side supports thereby selectively extending the effective lengths of said side supports to above the head of a hiker wearing said frame; a pair of coplaner lateral extension members of approximately equal length extending from attachment to and approximately normal to the upper ends of respective said side extension members; and a connection member extending from attachment between the distal ends of said lateral extension members approximately parallel the plane defined by said lateral extension members such that said side extension members, said lateral extension members and said connection member define a top shelf for said frame which may be selectively positioned either to the front of said frame above the head of a hiker wearing such frame or rearwardly of said frame.
Claim 2
Dependent Claim
182 words
In a backpack frame for hikers having at least two spaced, upright coplaner side supports, the improvement which comprises a top shelf extension formed from: a pair of side extension members of approximately equal length, each of which carries releasable means to connect the lower portion thereof in longitudinally adjustable relationship to the upper portion of either of said side supports thereby selectively extending the effective lengths of said side supports to above the head of a hiker wearing said frame; a pair of coplaner lateral extension members of approximately equal length extending from attachment to and approximately normal to the upper ends of respective said side extension members; and a connection member extending from attachment between the distal ends of said lateral extension members approximately parallel the plane defined by said lateral extension members such that said side extension members, said lateral extension members and said connection member define a top shelf for said frame which may be selectively positioned either to the front of said frame above the head of a hiker wearing such frame or rearwardly of said frame.
Claim 3
Dependent Claim
47 words
The improvement of claim 1 wherein the upper portion of said side supports and the lower portion of said side extension members carry adjustment means cooperative to connect said supports to said members at selected locations thereby selectively to adjust the effective length of said side supports.
Claim 4
Dependent Claim
49 words
The improvement of claim 2 wherein said adjustment means comprise a plurality of lateral bores through said side supports and said side extension members located so that a selected bore through a said side support may be selectively registered with any selected bore through a said side extension member.
Claim 5
Dependent Claim
45 words
The improvement of claim 1 wherein said side supports are of tubular construction and said side extension members are also of tubular construction with similar cross sectional configuration but sized relative to said side supports to slideably, coaxially engage said supports in a male/female relationship.
Claim 6
Dependent Claim
17 words
The improvement of claim 4 wherein said top bracket is formed from a single piece of tubing.
Claim 7
Dependent Claim
174 words
In conbination, a backpack frame having at least two spaced upright coplaner supports and a rigid adjustable top bracket which is comprised of: a pair of side extension members of approximately equal length, each of which is releasably connected in longitudinally adjustable relationship to the upper portion of one of said side supports thereby selectively extending the effective lengths of said side supports to above the head of a hiker wearing said frame; a pair of coplaner lateral extension members of approximately equal length extending from attachment to and approximately normal to the upper ends of respective said side extension members; and a connection member extending from attachment between the distal ends of said lateral extension members approximately parallel the plane defined by said lateral extension members such that said side extension members, said lateral extension members and said connection member define a top shelf for said frame which may be selectively positioned either to the front of said frame above the head of a hiker wearing such frame or rearwardly of said frame.
Claim 8
Dependent Claim
174 words
In conbination, a backpack frame having at least two spaced upright coplaner supports and a rigid adjustable top bracket which is comprised of: a pair of side extension members of approximately equal length, each of which is releasably connected in longitudinally adjustable relationship to the upper portion of one of said side supports thereby selectively extending the effective lengths of said side supports to above the head of a hiker wearing said frame; a pair of coplaner lateral extension members of approximately equal length extending from attachment to and approximately normal to the upper ends of respective said side extension members; and a connection member extending from attachment between the distal ends of said lateral extension members approximately parallel the plane defined by said lateral extension members such that said side extension members, said lateral extension members and said connection member define a top shelf for said frame which may be selectively positioned either to the front of said frame above the head of a hiker wearing such frame or rearwardly of said frame.
Claim 9
Dependent Claim
50 words
The combination of claim 6 wherein the upper portion of said side supports and the lower portion of said side extension members carry adjustment means cooperative to connect said side supports to said side extension members at selected locations thereby to selectively adjust the effective length of said side supports.
Claim 10
Dependent Claim
49 words
The combination of claim 7 wherein said adjustment means comprise a plurality of lateral bores through said side supports and said side extension members located so that a selected bore through a said side support may be selectively registered with any selected bore through a said side extension member.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-04 | 1979-02-03 | 1979-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-04 | 1983-02-03 | 1983-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-04 | 1987-02-03 | 1987-08-05 | $7700.00 | Window Closed / Lapsed |